subject:(Ceratomileuse assistida por excimer laser in situ)

1. Barreto Júnior, Jackson. Estudo comparativo entre a ceratectomia fotorrefrativa e a ceratomileusis in situ a laser guiadas pela análise de frente de onda.

Degree: PhD, Oftalmologia, 2010, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-31082010-174113/ ;

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OBJETIVO: Comparar os resultados de duas técnicas cirúrgicas guiadas pela análise de frente de onda, a ceratectomia fotorrefrativa (PRK) e a ceratomileusis in situ a… (more)

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OBJETIVO: Comparar os resultados de duas técnicas cirúrgicas guiadas pela análise de frente de onda, a ceratectomia fotorrefrativa (PRK) e a ceratomileusis in situ a laser (LASIK), para correção da miopia baixa a moderada, associada ou não ao astigmatismo. LOCAL: Setor de Cirurgia Refrativa da Clínica Oftalmológica do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brasil. MÉTODOS: Estudo prospectivo randomizado envolvendo 70 olhos (35 pacientes) submetidos ao LASIK personalizado em um olho e PRK personalizado no olho contralateral para correção de miopia até 5 dioptrias (D) e astigmatismo até 1,5D. Avaliou-se acuidade visual não-corrigida (AVNC), melhor acuidade visual corrigida (MAVC), resultados refratométricos, aberrometria, sensibilidade ao contraste fotópico e mesópico, acuidade visual de baixo contraste (AVBC), qualidade da imagem retiniana (Função de Transferência Modular e Strehl ratio) e espalhamento intraocular de luz (EIL) no período pré-operatório e no 1o, 3o, 6o e 12o mês pós-operatório. RESULTADOS: O equivalente esférico (EE) médio pré-operatório foi -2,57 ± 0,95D no grupo LASIK e, no grupo PRK, -2,52 ± 0,90D (p = 0,722). No 12o mês pósoperatório (PO), EE foi -0,06 ± 0,33D e -0,12 ± 0,41D, respectivamente (p = 0,438). No grupo LASIK, 60,0% dos olhos apresentaram AVNC 20/16 e 96,7% 20/20, e no grupo PRK, 66,6% e 96,7%, respectivamente (p = 0,667). No período pré-operatório, o total das aberrações de alta ordem (HOAs) foi 0,37 ± 0,09 m no grupo LASIK e 0,36 ± 0,11m no grupo PRK (p = 0,752). No 12o mês PO, o total das HOAs foi 0,46 ± 0,21m no grupo LASIK e 0,42 ± 0,14m no grupo PRK (p = 0,438). Tanto o teste de sensibilidade ao contraste fotópico como o mesópico apresentaram resultados semelhantes entre as técnicas, exceto pela freqüência 1,5 ciclos por grau (cpg) do teste mesópico no 12o mês PO, a favor do grupo PRK. Os índices de qualidade da imagem retiniana mostraram comportamento similar entre as técnicas ao longo do seguimento. Não houve aumento significativo do espalhamento intraocular da luz em ambos os grupos, quatro olhos cursaram com aumento transitório. CONCLUSÃO: Dentro das condições deste estudo, ambas as técnicas apresentaram excelentes resultados refratométricos e função visual semelhante. Apesar do tratamento personalizado guiado pela análise de frentes de onda, houve indução das HOAs, de forma similar, tanto no LASIK como no PRK.

PURPOSE: To compare clinical results of two wavefront-guided treatments, photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK), for low to moderate myopia correction, with or without astigmatism. SETTING: Refractive Surgery Service, General Hospital, University Of São Paulo, São Paulo, Brazil. METHODS: Prospective randomized study of 70 eyes (35 patients) submitted to custom LASIK and custom PRK (contralateral eye) for myopia up to 5D and astigmatism up to 1,5D. Uncorrected visual acuity (AVNC), best-corrected visual acuity (MAVC), refractive results, wavefront analysis, photopic and mesopic…

Advisors/Committee Members: Alves, Milton Ruiz.

Subjects/Keywords: Aberrometria; Astigmatism; Astigmatismo; Ceratectomia fotorrefrativa; Ceratomileuse assistida por excimer laser in situ; Contrast sensitivity; LASIK; Miopia; Myopia; PRK; Sensibilidade de contraste; Wavefront

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Barreto Júnior, J. (2010). Estudo comparativo entre a ceratectomia fotorrefrativa e a ceratomileusis in situ a laser guiadas pela análise de frente de onda. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/5/5149/tde-31082010-174113/ ;

Chicago Manual of Style (16^th Edition):

Barreto Júnior, Jackson. “Estudo comparativo entre a ceratectomia fotorrefrativa e a ceratomileusis in situ a laser guiadas pela análise de frente de onda.” 2010. Doctoral Dissertation, University of São Paulo. Accessed January 19, 2021. http://www.teses.usp.br/teses/disponiveis/5/5149/tde-31082010-174113/ ;.

MLA Handbook (7^th Edition):

Barreto Júnior, Jackson. “Estudo comparativo entre a ceratectomia fotorrefrativa e a ceratomileusis in situ a laser guiadas pela análise de frente de onda.” 2010. Web. 19 Jan 2021.

Vancouver:

Barreto Júnior J. Estudo comparativo entre a ceratectomia fotorrefrativa e a ceratomileusis in situ a laser guiadas pela análise de frente de onda. [Internet] [Doctoral dissertation]. University of São Paulo; 2010. [cited 2021 Jan 19]. Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-31082010-174113/ ;.

Council of Science Editors:

Barreto Júnior J. Estudo comparativo entre a ceratectomia fotorrefrativa e a ceratomileusis in situ a laser guiadas pela análise de frente de onda. [Doctoral Dissertation]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-31082010-174113/ ;

2. Medeiros, Fabricio Witzel de. Alterações biomecânicas da córnea de suínos induzidas pela confecções de lamelas pediculadas de diferentes espessuras por laser de femtossegundo.

Degree: PhD, Oftalmologia, 2011, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-22082011-123320/ ;

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Objetivo: Investigar as alterações biomecânicas da córnea de suínos induzidas pela confecção de lamelas pediculadas de diferentes espessuras pelo laser de femtossegundo. Métodos: Para a… (more)

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Objetivo: Investigar as alterações biomecânicas da córnea de suínos induzidas pela confecção de lamelas pediculadas de diferentes espessuras pelo laser de femtossegundo. Métodos: Para a formação dos dois grupos, 12 olhos de porcos foram usados: lamelas pediculadas de 100 e de 300 micrômetros confeccionadas pelo laser de femtossegundo. Cada olho foi submetido aos seguintes exames, antes da criação das lamelas: topografia por rasterstereography, Ocular Response Analyzer (ORA), tomografia do segmento anterior por coerência óptica para a avaliação paquimétrica corneal e das lamelas criadas e sistema de velocidade de onda (SVO), que mede a velocidade de propagação de ondas acústicas entre dois transdutores posicionados na superfície corneal antes e imediatamente, após a feitura da lamela. O primerio passo foi desenhado para o estudo das diferenças em relação à histerese corneal, fator de resistência corneal, mudanças na curvatura e velocidade de propagação de onda acústica entre córneas com lamelas finas e espessas. Posteriormente, as lamelas foram amputadas, e as medidas do sistema de velocidade de onda foram repetidas. Resultados: A média de espessura das lamelas ± desviopadrão (DP) foi de 108,5±6,9 (8,5% da espessura total) e 307,8±11,5 m (22,9% da espessura total), para os grupos de lamelas finas e espessas, respectivamente (p< 0,001). Histerese corneal e o fator de resistência corneal não apresentaram diferença estatística, após a criação de lamelas finas (p = 0,81 e p = 0,62, respectivamente). Histerese corneal foi significantemente mais baixa, depois da confecção de lamelas mais espessas (8,0±1,0 para 5,1±1,5 mmHg para medidas pré e pós-operatórias, respectivamente, p = 0,003, diminuição de 36,25%) e fator de resistência corneal também mostrou significante diminuição nesse grupo, após o procedimento cirúrgico; valores médios pré e pós-operatórios de 8,2±1,6 e 4,1±2,5 mmHg respectivamente (p= 0,007), diminuição de 50%. A ceratometria média simulada apresentou maiores valores, após a confecção das lamelas mais espessas em relação ao pré-operatório (ceratometria pré e pós-operatória de 39,5±1 D e 45,9±1,2 D, respectivamente, p= 0,003). Para o grupo de lamelas finas, não houve diferença estatisticamente significante (ceratometria pré e pós-operatória de 40,6±0,6 D e 41,4±1,0 D, respectivamente, p=0,55). Em relação ao Sistema de Velocidade de Onda, após a criação das lamelas e sua amputação, houve diminuição da velocidade de propagação acústica, embora na maior parte das posições não fosse estatisticamente significante. Conclusão: Nas condições experimentais estabelecidas por este estudo, a criação de lamelas de maior espessura pareceu exercer efeito mais relevante sobre a biomecânica da córnea de suínos

Purpose: To study the impact of programmed flaps at two different thicknesses on the biomechanical properties of the swine corneas. Methods: Twelve pig eyes were enrolled in this study and were formed two groups: 100m and 300 m flaps performed with the femtosecond laser. Each eye had the following procedure before…

Advisors/Committee Members: Alves, Milton Ruiz.

Subjects/Keywords: Biomecânica; Biomechanics; Ceratomileuse assistida por excimer laser in situ; Cirurgia refrativa; Cornea; Córnea; Corneal topography; Ectasia; Ectasia; Flaps; Histerese; Histeresis; Lamelas pediculadas; Laser-assisted in situ keratomileusis; Pachymetry; Paquimetria; Refractive surgery; Topografia da córnea

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Medeiros, F. W. d. (2011). Alterações biomecânicas da córnea de suínos induzidas pela confecções de lamelas pediculadas de diferentes espessuras por laser de femtossegundo. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/5/5149/tde-22082011-123320/ ;

Chicago Manual of Style (16^th Edition):

Medeiros, Fabricio Witzel de. “Alterações biomecânicas da córnea de suínos induzidas pela confecções de lamelas pediculadas de diferentes espessuras por laser de femtossegundo.” 2011. Doctoral Dissertation, University of São Paulo. Accessed January 19, 2021. http://www.teses.usp.br/teses/disponiveis/5/5149/tde-22082011-123320/ ;.

MLA Handbook (7^th Edition):

Medeiros, Fabricio Witzel de. “Alterações biomecânicas da córnea de suínos induzidas pela confecções de lamelas pediculadas de diferentes espessuras por laser de femtossegundo.” 2011. Web. 19 Jan 2021.

Vancouver:

Medeiros FWd. Alterações biomecânicas da córnea de suínos induzidas pela confecções de lamelas pediculadas de diferentes espessuras por laser de femtossegundo. [Internet] [Doctoral dissertation]. University of São Paulo; 2011. [cited 2021 Jan 19]. Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-22082011-123320/ ;.

Council of Science Editors:

Medeiros FWd. Alterações biomecânicas da córnea de suínos induzidas pela confecções de lamelas pediculadas de diferentes espessuras por laser de femtossegundo. [Doctoral Dissertation]. University of São Paulo; 2011. Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-22082011-123320/ ;

3. Ghanem, Vinicius Coral. Estudo comparativo entre a ceratectomia fotorrefrativa (PRK) e a ceratectomia subepitelial borboleta assistida a laser (LASEK borboleta).

Degree: PhD, Oftalmologia, 2007, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-24102007-153937/ ;

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OBJETIVO: Avaliar comparativamente os resultados de duas técnicas de cirurgia refrativa de superfície com excimer laser, ceratectomia fotorrefrativa (PRK) e ceratectomia subepitelial borboleta assistida à… (more)

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OBJETIVO: Avaliar comparativamente os resultados de duas técnicas de cirurgia refrativa de superfície com excimer laser, ceratectomia fotorrefrativa (PRK) e ceratectomia subepitelial borboleta assistida à laser (LASEKb). LOCAL: Hospital de Olhos Sadalla Amin Ghanem, Joinville, Santa Catarina, Brasil. MÉTODOS: Realizou-se um estudo prospectivo, randomizado e duplo-cego envolvendo 102 olhos de 51 pacientes. Cada paciente teve aleatoriamente um dos olhos operado com a técnica do PRK e o outro com LASEKb. Os pacientes foram acompanhados por 1 ano. RESULTADOS: Não houveram diferenças significativas entre os dois grupos na acuidade visual (AV) para longe, sem correção, (P = 0,5593). No 12o mês pós-operatório (PO), 98,04% dos olhos no grupo do PRK e 96,08% no grupo do LASEKb atingiram AV sem correção de 20/20. A previsibilidade, eficácia, segurança e estabilidade não apresentaram diferença estatisticamente significativa entre os grupos. O índice de segurança foi de 1 no PRK e 0,996 no LASEKb. Um olho do grupo do LASEKb perdeu uma linha de visão. A porcentagem de olhos que apresentou EE aos 12 meses na faixa de ±0,50 D foi de 94,1% no grupo do PRK e de 86,3% no grupo do LASEKb (P = 0,1883). Enquanto que na faixa de ±1,0 D foi de 100% no grupo do PRK e 98% no grupo do LASEKb (P = 0,3125). Não houve necessidade de reoperações. O tempo médio de cirurgia na técnica PRK foi de 304,86 + 58,77 segundos (aproximadamente 5 minutos) e na técnica LASEKb de 608,35 + 76,88 segundos (aproximadamente 10 minutos) (P < 0,001). O tempo médio de reepitelização no grupo do PRK foi de 4,35 ± 0,48 dias (variação, 4 a 5 dias) e no grupo do BLASEK foi de 4,75 ± 0,72 dias (variação, 4 a 6 dias) (P < 0,002). Os níveis de dor e o desconforto ocular PO não foram estatisticamente diferentes entre os grupos, entretanto houve uma tendência para menor dor no PRK (3,31 ± 4,09 vs 4,43 ± 4,27; P = 0,18). Houve uma redução estatisticamente significativa nos valores do teste de Schirmer em todas as avaliação PO, tanto no PRK (23,6 ± 8,1 vs 19,4 ± 10,1; P < 0,002) quanto no LASEKb (22,4 ± 8,7 vs 18,9 ± 9,7; P = 0,01), entretanto não houve diferença entre os grupos. A opacificação corneana (OC) PO foi pequena nos dois grupos. Somente no 1o mês foi observado diferença estatística entre os grupos, com maior intensidade da OC no grupo do LASEKb (0,18 ± 0,3881) quando comparado ao PRK (0,08 ± 0,2109) (P = 0,039936). A maior intensidade foi observada no 3o mês, com redução gradativa até o 12o mês. CONCLUSÃO: Dentro das condições deste estudo, conclui-se que o PRK e o LASEKb mostraram resultados semelhantes, exceto que o PRK apresentou menor tempo cirúrgico, reepitelização corneana mais rápida e menor OC no 30o PO.

PURPOSE: Comparatively evaluate the results of two techniques of surface excimer laser refractive surgery, photorefractive keratectomy (PRK) and butterfly laser-assisted subepithelial keratectomy (BLASEK). SETTING: Sadalla Amin Ghanem Eye Hospital, Joinville, Santa Catarina, Brazil. METHODS: This is a prospective, randomized and double-masked study…

Advisors/Committee Members: Jose, Newton Kara.

Subjects/Keywords: Astigmatism; Astigmatismo; Ceractectomia fotorrefrativa por excimer laser; Ceratectomia subepitelial assistida por laser; Double-blind method; Estudos prospectivos; Excimer laser photorefractive keratectomy; Laser assisted subepithelial keratectomy; Método duplo-cego; Miopia; Myopia; Prospective studies

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ghanem, V. C. (2007). Estudo comparativo entre a ceratectomia fotorrefrativa (PRK) e a ceratectomia subepitelial borboleta assistida a laser (LASEK borboleta). (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/5/5149/tde-24102007-153937/ ;

Chicago Manual of Style (16^th Edition):

Ghanem, Vinicius Coral. “Estudo comparativo entre a ceratectomia fotorrefrativa (PRK) e a ceratectomia subepitelial borboleta assistida a laser (LASEK borboleta).” 2007. Doctoral Dissertation, University of São Paulo. Accessed January 19, 2021. http://www.teses.usp.br/teses/disponiveis/5/5149/tde-24102007-153937/ ;.

MLA Handbook (7^th Edition):

Ghanem, Vinicius Coral. “Estudo comparativo entre a ceratectomia fotorrefrativa (PRK) e a ceratectomia subepitelial borboleta assistida a laser (LASEK borboleta).” 2007. Web. 19 Jan 2021.

Vancouver:

Ghanem VC. Estudo comparativo entre a ceratectomia fotorrefrativa (PRK) e a ceratectomia subepitelial borboleta assistida a laser (LASEK borboleta). [Internet] [Doctoral dissertation]. University of São Paulo; 2007. [cited 2021 Jan 19]. Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-24102007-153937/ ;.

Council of Science Editors:

Ghanem VC. Estudo comparativo entre a ceratectomia fotorrefrativa (PRK) e a ceratectomia subepitelial borboleta assistida a laser (LASEK borboleta). [Doctoral Dissertation]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-24102007-153937/ ;

4. Santos, Tiago João Batista. Proteogenómica de isolados de Enterococcus spp. e Escherichia coli com a utilização do MALDI-TOF MS.

Degree: 2016, RCAAP

URL: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5482

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Dissertação de Mestrado em Genética Molecular Comparativa e Tecnológica

Os Enterococcus spp. e Escherichia coli são microrganismos comensais do trato gastrintestinal da maioria dos animais… (more)

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Dissertação de Mestrado em Genética Molecular Comparativa e Tecnológica

Os Enterococcus spp. e Escherichia coli são microrganismos comensais do trato gastrintestinal da maioria dos animais e humanos, permitindo realizar estudos genéticos sobre a ocorrência e disseminação da resistência aos antibióticos. Estas bactérias apresentam, também, diferenças significativas no seu proteoma, representando bons organismos modelo para a caracterização bacteriana por novas técnicas proteómicas, como o MALDI-TOF MS. Estes dois aspetos estão relacionados com os objetivos deste trabalho: estudar a taxa de resistência a antibióticos em isolados fecais de Enterococcus spp. de aves selvagens do Arquipélago dos Açores e caracterizar, por meio de MALDI-TOF MS, isolados de E. coli e enterococos com a mesma proveniência, a nível proteómico. A resistência aos antibióticos é um problema emergente em saúde pública pelo que, a avaliação da suscetibilidade aos antibióticos em “bactérias indicadoras”, atua como forma de controlo da disseminação. As bactérias deste estudo são reservatórios de genes de resistência que podem ser transmitidos para outras bactérias patogénicas ou comensais e, assim, representar um problema à escala mundial. A emergência de estirpes de enterococos resistentes à vancomicina (VRE) realça a inexistência de barreiras entre hospitais, população e animais. Os estudos sobre a incidência de enterococos resistentes em animais selvagens são escassos, pelo que, a sua propagação oriunda de outros biossistemas é ainda pouco compreendida. Porém, é reconhecido que os animais selvagens, incluindo as aves, albergam bactérias que atuam como reservatórios de genes de resistência passíveis de ser disseminados. A prevalência e os mecanismos implicados na resistência aos antibióticos foram avaliados em 138 isolados Enterococcus spp. (59 Enterococcus faecalis, 40 E. faecium, 27 E. durans e 12 E. hirae), de um total de 218 amostras fecais de aves dos Açores. Encontraram-se percentagens elevadas de resistência nos enterococos para a tetraciclina (32,6%) e a ciprofloxacina (19,6%), sendo que 46,4% dos isolados apresentaram resistência a pelo menos um antibiótico. Pela técnica de PCR com primers específicos e corrida eletroforética dos amplicões obtidos em gel de agarose, a presença dos genes erm(B), tet(M) e/ou tet(L), e van(A) foi confirmada, nos isolados resistentes à eritromicina, tetraciclina e vancomicina, respetivamente. Vários estudos estão de acordo com os resultados obtidos neste trabalho, realizados noutras aves selvagens, como gaivotas e pombas. A informação conseguida é importante para fomentar o conhecimento sobre a disseminação de bactérias resistentes no ecossistema selvagem e as possíveis implicações resultantes da transferência para outros animais ou humanos. A técnica “Matrix Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry” (MALDI-TOF MS) é um método expedito e preciso na identificação de bactérias intactas, em comparação com os métodos convencionais de microbiologia e/ou biologia molecular. O…

Advisors/Committee Members: Igrejas, Gilberto Paulo Peixoto, Capelo Martinez, José Luís.

Subjects/Keywords: Microrganismos; Resistência a antibióticos; Espectrometria de massas por ionização e dessorção a laser assistida por matriz (MALDI-TOF/MS)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Santos, T. J. B. (2016). Proteogenómica de isolados de Enterococcus spp. e Escherichia coli com a utilização do MALDI-TOF MS. (Thesis). RCAAP. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5482

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Santos, Tiago João Batista. “Proteogenómica de isolados de Enterococcus spp. e Escherichia coli com a utilização do MALDI-TOF MS.” 2016. Thesis, RCAAP. Accessed January 19, 2021. http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5482.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Santos, Tiago João Batista. “Proteogenómica de isolados de Enterococcus spp. e Escherichia coli com a utilização do MALDI-TOF MS.” 2016. Web. 19 Jan 2021.

Vancouver:

Santos TJB. Proteogenómica de isolados de Enterococcus spp. e Escherichia coli com a utilização do MALDI-TOF MS. [Internet] [Thesis]. RCAAP; 2016. [cited 2021 Jan 19]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5482.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Santos TJB. Proteogenómica de isolados de Enterococcus spp. e Escherichia coli com a utilização do MALDI-TOF MS. [Thesis]. RCAAP; 2016. Available from: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5482

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

5. Núbia Cristina de Freitas Maia. Avaliação da exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea.

Degree: 2006, Universidade Federal de São Paulo

URL: http://www.bdtd.unifesp.br/tede//tde_busca/arquivo.php?codArquivo=83

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Objetivo: Avaliar a exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea utilizando um microcerátomo e uma câmara anterior artificial . Métodos: 21 olhos… (more)

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Objetivo: Avaliar a exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea utilizando um microcerátomo e uma câmara anterior artificial . Métodos: 21 olhos com opacidades corneanas superficiais foram submetidos ao transplante lamelar automatizado de córnea. Nos olhos receptores a ceratectomia foi realizada semelhante a uma cirurgia refrativa. As lamelas doadoras foram obtidas a partir de botões esclero-corneanos utilizando o mesmo microcerátomo e uma câmara anterior artificial. As medidas das espessuras corneanas foram feitas através da biomicroscopia ultra-sônica. Resultados: As cirurgias obtiveram êxito em 19 olhos. Em 80% das lamelas obtidas em córneas doadoras e em 84,2% das lamelas em olhos receptores houve uma variação de até 0,5mm do diâmetro desejado. Verificou-se uma alta semelhança entre as espessuras das lamelas obtidas nos olhos receptores e lamelas doadoras. Obteve-se acuidade visual corrigida pós-operatória igual ou superior a 20/40 em 52,6% dos olhos. Foram observadas complicações como diâmetro inadequado da lamela, perfuração intra-operatória e ectasia corneana pós-operatória (um caso). Conclusão: O transplante lamelar automatizado de córnea mostrou-se executável pela reprodutibilidade das espessuras e diâmetros das lamelas; eficaz pela melhora da acuidade visual pós-operatória e seguro, devido ao baixo índice de complicação cirúrgica.

Purpose: To evaluate the feasibility, efficacy and safety of a manual microkeratome and an artificial anterior chamber for lamellar keratoplasty (the ALTK system). Methods: twenty one eyes with superficial corneal opacities had been submitted to lamellar keratectomy. In recipient eyes the keratectomy was performed as in refractive surgery. The donor flap was removed from the preserved corneal shell using the same microkeratome and an artificial anterior chamber. The lamella thickness was measured by an ultrasound biomicroscopy (UBM) in postoperative time. Results: The surgeries were accomplished successfully in 19 eyes. 75% of the flaps obtained in donated corneas and 83,3% of the flaps in recipient eyes had a variation of even 0,5mm of the desired diameter. An adequate thickness between the donor flap and the recipient stromal bed was gotten. Post operative visual acuity of 20/40 or better was observed in 52,6% of the eyes. It was observed complications such as undesired diameter of the flap, a case of perforation and a case of cornea ectasia. Conclusion: the ALTK system showed a good performance through the predictability and reproducibility regarding the lamella thickness and diameter, efficient by improvement of post operative visual acuity and safe due to the low complication level. 86

Advisors/Committee Members: Wallace Chamon, Bruno Castelo Branco.

Subjects/Keywords: Opacidade da córnea/cirurgia; Transplante de córnea; Ceratectomia fotorrefractiva por excimer laser/métodos; Resultado de tratamento.; OFTALMOLOGIA; Não tem

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Maia, N. C. d. F. (2006). Avaliação da exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea. (Thesis). Universidade Federal de São Paulo. Retrieved from http://www.bdtd.unifesp.br/tede//tde_busca/arquivo.php?codArquivo=83

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Maia, Núbia Cristina de Freitas. “Avaliação da exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea.” 2006. Thesis, Universidade Federal de São Paulo. Accessed January 19, 2021. http://www.bdtd.unifesp.br/tede//tde_busca/arquivo.php?codArquivo=83.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Maia, Núbia Cristina de Freitas. “Avaliação da exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea.” 2006. Web. 19 Jan 2021.

Vancouver:

Maia NCdF. Avaliação da exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea. [Internet] [Thesis]. Universidade Federal de São Paulo; 2006. [cited 2021 Jan 19]. Available from: http://www.bdtd.unifesp.br/tede//tde_busca/arquivo.php?codArquivo=83.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Maia NCdF. Avaliação da exeqüibilidade, eficácia e segurança do transplante lamelar semi-automatizado de córnea. [Thesis]. Universidade Federal de São Paulo; 2006. Available from: http://www.bdtd.unifesp.br/tede//tde_busca/arquivo.php?codArquivo=83

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

6. Oliveira, Simone Cristina Buzzo. Avaliação da glicosilação não enzimática (glicação) sobre a fosfolipases A2 secretórias pró-inflamatórias isoladas de venenos de serpentes: Evaluation of non enzymatic glycosylation (glycation) on phospholipase A2 secretory pro-inflammatory isolated from snake venoms.

Degree: 2011, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/314477

► Abstract: The objective of this work was evaluate the effect of glycations in the secretory PLA2 isolated from Crotalus durissus collilineatus (Cdcolli) and Bothrops jararacussu… (more)

▼ Abstract: The objective of this work was evaluate the effect of glycations in the secretory PLA2 isolated from Crotalus durissus collilineatus (Cdcolli) and Bothrops jararacussu (BthTX-I, catalytic inative K49 and BthTX-II, catalytic active D49) rattlesnake venom. The MALDI-TOF technic was used to test the glycation in the PLA2: Cdcolli showed glycation to 6 molecules of D-Glucose and 5 molecules of D-Lactose, but no glycation to D-Galactose; the BthTX-I showed glycation to 5 molecules of D-Glucose, 1 molecule of D-Galactose and 4 molecules of D-Lactose; the BthTX-II showed glycation to 6 molecules of D-Glucose, 1 molecule of D-Galactose and 4 molecules of D-Lactose. The glycation of PLA2 from Cdcolli to D-Glucose and D-Lactose increased the enzymatic activity and changed its alosteric profile, in the same way, theses carbohydrates increased the edematogenic effect and annuled the citotoxic activity. However, D-Lactose and D-Glucose decreased the miotoxic effect and changed the platelet aggregation profile of native PLA2, although only D-Lactose had decreased the aggregation. The glycation of BthTX-I to D-Glicose and D-Galactose decreased the edematogenic effect and its glycation to all carbohydrates decreased the miotoxic effect. The glycation of BthTX-II to D-Lactose decreased its enzymatic activity; the edematogenic effect was decreased by the glycation to all the carbohydrates, while the glycation to D-Glucose and D-Galactose decreased the miotoxic effect. The intrinsec fluorescence shows changes in the terciary structure of BthTX-I and BthTX-II after glycation and the circular dichroism suggests modification in the secundary structure of glycated PLA2 from Cdcolli. Besides, the structure modelation shows many free areas in the PLA2 from Cdcolli, where the glycation can be happening. Theses results suggest that the glycation modifies the structure of PLA2, modulating in a different way the enzymatic and the biologic activity; probably the structure changes or even the linked carbohydrates to the PLA2 structure are modifying the affinity for membrane receptors. Additionally, the results show that the enzymatic and biological sites are in different areas in the PLA2 structure. Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Toyama, Marcos Hikari (advisor), Universidade Estadual de Campinas. Instituto de Biologia (institution), Programa de Pós-Graduação em Biologia Funcional e Molecular (nameofprogram), Moriel, Patricia (committee member), Ferreira, Marcelo José Pena (committee member), Lago, João Henrique Guilardi (committee member), Marangoni, Sérgio (committee member).

Subjects/Keywords: Glicosilação; Fosfolipase A2; Carboidratos; Espectrometria de massas por ionização e dessorção a laser assistida por matriz; Edema; Glycosylation; Phospholipase A2; Carbohydrates; Matrix-assisted laser desorption-ionization mass spectrometry; Edema

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oliveira, S. C. B. (2011). Avaliação da glicosilação não enzimática (glicação) sobre a fosfolipases A2 secretórias pró-inflamatórias isoladas de venenos de serpentes: Evaluation of non enzymatic glycosylation (glycation) on phospholipase A2 secretory pro-inflammatory isolated from snake venoms. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/314477

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Oliveira, Simone Cristina Buzzo. “Avaliação da glicosilação não enzimática (glicação) sobre a fosfolipases A2 secretórias pró-inflamatórias isoladas de venenos de serpentes: Evaluation of non enzymatic glycosylation (glycation) on phospholipase A2 secretory pro-inflammatory isolated from snake venoms.” 2011. Thesis, Universidade Estadual de Campinas. Accessed January 19, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/314477.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Oliveira, Simone Cristina Buzzo. “Avaliação da glicosilação não enzimática (glicação) sobre a fosfolipases A2 secretórias pró-inflamatórias isoladas de venenos de serpentes: Evaluation of non enzymatic glycosylation (glycation) on phospholipase A2 secretory pro-inflammatory isolated from snake venoms.” 2011. Web. 19 Jan 2021.

Vancouver:

Oliveira SCB. Avaliação da glicosilação não enzimática (glicação) sobre a fosfolipases A2 secretórias pró-inflamatórias isoladas de venenos de serpentes: Evaluation of non enzymatic glycosylation (glycation) on phospholipase A2 secretory pro-inflammatory isolated from snake venoms. [Internet] [Thesis]. Universidade Estadual de Campinas; 2011. [cited 2021 Jan 19]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/314477.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Oliveira SCB. Avaliação da glicosilação não enzimática (glicação) sobre a fosfolipases A2 secretórias pró-inflamatórias isoladas de venenos de serpentes: Evaluation of non enzymatic glycosylation (glycation) on phospholipase A2 secretory pro-inflammatory isolated from snake venoms. [Thesis]. Universidade Estadual de Campinas; 2011. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/314477

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

7. Santos, Vanessa Gonçalves dos, 1983-. Explorando novas aplicações para a técnica de espectrometria de massas com ionização/dessorção por laser - LDI-MS: Exploring new applications for laser desorption/ionization mass spectrometry - LDI-MS.

Degree: 2016, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/321937

► Abstract: This work applied laser desorption/ ionization mass spectrometry (LDI), in the analysis of target compounds present in complex matrices exploring new practical applications for… (more)

▼ Abstract: This work applied laser desorption/ ionization mass spectrometry (LDI), in the analysis of target compounds present in complex matrices exploring new practical applications for the technique. Two approaches were employed: the fingerprinting analysis that characterizes the samples by means of their characteristic profile and mass spectrometry imaging (MSI). The presence of fullerenes as constituents of carbonaceous materials or their formation as artifacts of the LDI-MS analysis was reinvestigated and reviewed. The results showed that, using asphaltenes samples with different compositions as well as polycyclic aromatic hydrocarbon (PAH) standards, Cn fullerene rings are often formed as predominant artifacts under laser radiation. When the present results are also evaluated in the light of the vast literature on LDI-MS of carbonaceous materials, the formation of fullerene artifacts appears to be particularly frequent, being more common in samples with high concentration of PAH and varying according to the type and intensity of the laser used. The second work used matrix assisted LDI (MALDI) technique in the analysis of bovine single embryo whose cryopreservation can be influenced by factors such as subspecies involved, presence of lipid droplets and in vitro culture. However, little information is available on membrane lipids in embryos. The objective of this work was to compare the membrane lipids profiles and to relate this information to the levels of cytoplasmic lipids present in Nellore and Simmental blastocysts produced in vivo (ET) and in vitro (IVP). The results showed that the phosphatidylcholines and sphingomyelins profile differs significantly in the level of unsaturation and carbon chain composition in bovine blastocysts due to subspecies and in vitro culture conditions. The third work arose from the need to improve the single embryo analysis technique in order to obtain more comprehensible results of lipid fingerprinting by MALDI-MS and to considerably increase the lipid information obtained from a single embryo. Starting from an imaging approach, the ability of nano-assisted LDI mass spectrometry (NALDI-MS) to promote selective monitoring with an appropriate spatial distribution of lipid profiles of tumor tissues after tissue fixation on plate was tested. NALDI-MS imaging has identified and mapped several potential biomarkers in a murine melanoma model (B16 / F10) treated with synthetic supplement containing phosphoethanolamine (PHO-S) against control (untreated) tumor tissue. This method provided good quality and chemical selectivity to the images, with preservation of spatial distribution and less interference from the tissue and the results showed a decrease in the relative abundance of the tumor biomarkers. Finally, the MALDI imaging technique was applied to determine the spatial distribution of peptides such as cyclic microcystins and nodularins released by cultures of cyanobacteria directly into the agar. Aiming for a better understanding of the release of these peptides and other key… Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Eberlin, Marcos Nogueira, 1959- (advisor), Universidade Estadual de Campinas. Instituto de Química (institution), Programa de Pós-Graduação em Química (nameofprogram), Cataldi, Thaís Regiani (committee member), Garcia, Jerusa Simone (committee member), Sussulini, Alessandra (committee member), Oliveira, Luciana Gonzaga de (committee member).

Subjects/Keywords: Espectrometria de massas; Espectrometria de massas por ionização e dessorção a laser assistida por matriz; Espectrometria de imageamento; Mass spectrometry; Matrix assisted laser desorption ionization; Mass spectrometry imaging

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Santos, Vanessa Gonçalves dos, 1. (2016). Explorando novas aplicações para a técnica de espectrometria de massas com ionização/dessorção por laser - LDI-MS: Exploring new applications for laser desorption/ionization mass spectrometry - LDI-MS. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/321937

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Santos, Vanessa Gonçalves dos, 1983-. “Explorando novas aplicações para a técnica de espectrometria de massas com ionização/dessorção por laser - LDI-MS: Exploring new applications for laser desorption/ionization mass spectrometry - LDI-MS.” 2016. Thesis, Universidade Estadual de Campinas. Accessed January 19, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/321937.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Santos, Vanessa Gonçalves dos, 1983-. “Explorando novas aplicações para a técnica de espectrometria de massas com ionização/dessorção por laser - LDI-MS: Exploring new applications for laser desorption/ionization mass spectrometry - LDI-MS.” 2016. Web. 19 Jan 2021.

Vancouver:

Santos, Vanessa Gonçalves dos 1. Explorando novas aplicações para a técnica de espectrometria de massas com ionização/dessorção por laser - LDI-MS: Exploring new applications for laser desorption/ionization mass spectrometry - LDI-MS. [Internet] [Thesis]. Universidade Estadual de Campinas; 2016. [cited 2021 Jan 19]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/321937.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Santos, Vanessa Gonçalves dos 1. Explorando novas aplicações para a técnica de espectrometria de massas com ionização/dessorção por laser - LDI-MS: Exploring new applications for laser desorption/ionization mass spectrometry - LDI-MS. [Thesis]. Universidade Estadual de Campinas; 2016. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/321937

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

8. Lopes, Miguel. Estudo do comportamento ao desgaste de compósitos de Al-12Si/NbC desenvolvidos por deposição assistida por laser.

Degree: 2018, RCAAP

URL: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/21227

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Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Engenharia de Produção

Os revestimentos compósitos Al-12Si/NbC foram produzidos por deposição… (more)

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Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Engenharia de Produção

Os revestimentos compósitos Al-12Si/NbC foram produzidos por deposição assistida por laser em um substrato de liga Al-7Si. A microestrutura e a resistência ao desgaste dos revestimentos foram avaliadas em comparação com as propriedades do substrato e da liga da matriz. A resistência ao desgaste foi avaliada usando testes de deslizamento reciproco de configuração esfera sobre o plano, em que foram usados como contra-corpos esferas do aço crómio AISI 52100, aço inox 316L, carboneto de tungsténio (WC) e óxido de alumínio (Al2O3). A microestrutura dos revestimentos é constituída por partículas de NbC dispersas numa matriz de liga Al-12Si. A matriz é constituída por dendrites primárias de α-Al e mistura eutéctica α-Al/Si. O reforço com partículas de NbC induz um aumento considerável na dureza média do material da matriz de (85 ± 1) HV a (152 ± 40) HV e na respetiva resistência ao desgaste. Os mecanismos de desgaste envolvem oxidação, adesão com deformação plástica e delaminação e dependem do contra-corpo utlizado.

Al-12Si/NbC composite coatings were produced by laser-assisted deposition on a substrate of Al-7Si alloy. The microstructure and wear resistance of the coatings were evaluated in comparison to the properties of the substrate and the matrix alloy. The wear resistance was evaluated using reciprocating sliding tests in a configuration of sphere over-a-plan and as counter-body spheres of AISI 52100 chromium steel, AISI 316L stainless steel, tungsten carbide (WC) and alumina (Al2O3). The coatings microstructure consists of NbC particles dispersed in an Al-12Si alloy matrix. The matrix consists of primary dendrites of α-Al and α-Al/Si eutectic mixture. The reinforcement with NbC particles induces a considerable increase in the average hardness of the matrix material from (85 ± 1) HV to (152 ± 40) HV and in the respective wear resistance. The wear mechanisms involve oxidation, adhesion with plastic deformation and delamination and depend of the counter-body used.

Advisors/Committee Members: Pina, Célio, Almeida, Amélia.

Subjects/Keywords: Deposição assistida por laser; Compósito Al-12Si/NbC; Desgaste por deslizamento; Laser-assisted deposition; Al-12Si/NbC composite; Sliding wear; Domínio/Área Científica::Engenharia e Tecnologia

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lopes, M. (2018). Estudo do comportamento ao desgaste de compósitos de Al-12Si/NbC desenvolvidos por deposição assistida por laser. (Thesis). RCAAP. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/21227

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lopes, Miguel. “Estudo do comportamento ao desgaste de compósitos de Al-12Si/NbC desenvolvidos por deposição assistida por laser.” 2018. Thesis, RCAAP. Accessed January 19, 2021. https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/21227.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lopes, Miguel. “Estudo do comportamento ao desgaste de compósitos de Al-12Si/NbC desenvolvidos por deposição assistida por laser.” 2018. Web. 19 Jan 2021.

Vancouver:

Lopes M. Estudo do comportamento ao desgaste de compósitos de Al-12Si/NbC desenvolvidos por deposição assistida por laser. [Internet] [Thesis]. RCAAP; 2018. [cited 2021 Jan 19]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/21227.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lopes M. Estudo do comportamento ao desgaste de compósitos de Al-12Si/NbC desenvolvidos por deposição assistida por laser. [Thesis]. RCAAP; 2018. Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/21227

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Ferreira, Jorge Miguel Lourenço. Extracção e identificação de proteínas possivelmente associadas à ocorrência de abortos espontâneos.

Degree: 2016, RCAAP

URL: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5481

►

Dissertação de Mestrado em Genética Molecular Comparativa e Tecnológica

Estudos indicam que cerca de 20% das gravidezes clínicas terminam em aborto espontâneo, principalmente durante o… (more)

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Dissertação de Mestrado em Genética Molecular Comparativa e Tecnológica

Estudos indicam que cerca de 20% das gravidezes clínicas terminam em aborto espontâneo, principalmente durante o 1º semestre. Apesar de aproximadamente 55% dos mesmos se deverem a anomalias cromossómicas, torna-se essencial complementar as técnicas convencionais de prog- e diagnóstico. A análise proteómica pode desempenhar um papel crucial na abordagem desta problemática. A identificação de proteínas adversas (incluindo proteínas com modificações pós-traducionais) ao desenvolvimento embrionário em humanos pode elucidar as causas desta anomalia. Assim, este trabalho dividiu-se em três fases. A primeira que consistiu na optimização da extracção das proteínas presentes nos abortos, aliado à técnica de electroforese em gel de poliacrilamida na presença de dodecil sulfato de sódio (SDSPAGE, sodium dodecyl sulfate – polyacrylamide gel electrophoresis). A segunda fase consistiu na separação das mesmas por peso molecular e ponto isoeléctrico, através do procedimento de focalização isoeléctrica, seguido de electroforese em gel de poliacrilamida na presença de dodecil sulfato de sódio (SDS-PAGE x IEF, sodium dodecyl sulfate – polyacrylamide gel electrophoresis x isoelectric focusing) e, finalmente, procedeu-se à sua identificação por ionização e dessorção a laser assistida por matriz, com recurso ao tempo de voo (MALDI-TOF/TOF, Matrix-assisted laser desorption/ionization – Time of flight/ Mass Spectometry). Com base na técnica de MALDI-TOF/MS foi possível identificar 23 proteínas relacionadas com diversos processos destacando-se a glicólise, regulação do ciclo celular, mecanismos de tradução e angiogénese e resposta a stress. Através da identificação de proteínas como a HSP 70 e 90 e algumas variantes é possível, por exemplo, formular a hipótese de uma infecção bacteriana não detectada. As anti-HSPs produzidas podem ter afectado o crescimento do feto, dado que as mesmas são crucias no desenvolvimento inicial do embrião. Graças a este trabalho, a análise proteica revelou-se uma ferramenta de prog- e diagnóstico promissora nesta problemática, carecendo mais estudos, para que num futuro próximo a mesma se consiga conjugar com as actuais técnicas utilizadas.

Studies show that about 20% of the clinical pregnancies end with the loss of the fetus, resulting in a spontaneous abortion, mainly in the 1st semester. Although around 55% of the spontaneous abortions are due to chromosomes anomalies, it is crucial to add new techniques to the conventional ones, to increase the prog- and diagnosis. The proteomic analysis may play an important role in this kind of studies. The identification of adverse proteins (including proteins with post transcriptional modifications) to the human embryonic development may elucidate the causes related to this anomaly. Taking that in consideration, this work is divided in three distinct phases. The 1st one was the optimization of the protein extraction from the abortions, using the SDSPAGE (sodium dodecyl sulfate – polyacrylamide…

Advisors/Committee Members: Igrejas, Gilberto, Leite, Rosário Pinto.

Subjects/Keywords: Proteómica; Aborto espontâneo; Eletroforese em gel de poliacrilamida (SDS-PAGE); Espectrometria de massas por ionização e dessorção a laser assistida por matriz (MALDI-TOF/MS)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ferreira, J. M. L. (2016). Extracção e identificação de proteínas possivelmente associadas à ocorrência de abortos espontâneos. (Thesis). RCAAP. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5481

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ferreira, Jorge Miguel Lourenço. “Extracção e identificação de proteínas possivelmente associadas à ocorrência de abortos espontâneos.” 2016. Thesis, RCAAP. Accessed January 19, 2021. http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5481.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ferreira, Jorge Miguel Lourenço. “Extracção e identificação de proteínas possivelmente associadas à ocorrência de abortos espontâneos.” 2016. Web. 19 Jan 2021.

Vancouver:

Ferreira JML. Extracção e identificação de proteínas possivelmente associadas à ocorrência de abortos espontâneos. [Internet] [Thesis]. RCAAP; 2016. [cited 2021 Jan 19]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5481.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ferreira JML. Extracção e identificação de proteínas possivelmente associadas à ocorrência de abortos espontâneos. [Thesis]. RCAAP; 2016. Available from: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5481

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Univerzitet u Beogradu

10. Perović, Ivana. 1984-. Uticaj primene jonskih aktivatora na bazi d-metala Zn, Co, Cu, Ni, Mo i laserskog zračenja na energetsku efikasnost procesa dobijanja vodonika alkalnom elektrolizom.

Degree: Fakultet za fizičku hemiju, 2018, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:18989/bdef:Content/get

►

Fizička hemija - Elektrohemija / Physical chemistry - Electrochemistry

Rast životnog standarda sve brže rastuće svetske populacije zahteva veliki napredak u snabdevanju energijom i povećanom… (more)

Subjects/Keywords: hydrogen; energy efficiency; alkaline electrolysis; in situ activation; laser radiation; green laser

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APA (6^th Edition):

Perović, I. 1. (2018). Uticaj primene jonskih aktivatora na bazi d-metala Zn, Co, Cu, Ni, Mo i laserskog zračenja na energetsku efikasnost procesa dobijanja vodonika alkalnom elektrolizom. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:18989/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Perović, Ivana 1984-. “Uticaj primene jonskih aktivatora na bazi d-metala Zn, Co, Cu, Ni, Mo i laserskog zračenja na energetsku efikasnost procesa dobijanja vodonika alkalnom elektrolizom.” 2018. Thesis, Univerzitet u Beogradu. Accessed January 19, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:18989/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Perović, Ivana 1984-. “Uticaj primene jonskih aktivatora na bazi d-metala Zn, Co, Cu, Ni, Mo i laserskog zračenja na energetsku efikasnost procesa dobijanja vodonika alkalnom elektrolizom.” 2018. Web. 19 Jan 2021.

Vancouver:

Perović I1. Uticaj primene jonskih aktivatora na bazi d-metala Zn, Co, Cu, Ni, Mo i laserskog zračenja na energetsku efikasnost procesa dobijanja vodonika alkalnom elektrolizom. [Internet] [Thesis]. Univerzitet u Beogradu; 2018. [cited 2021 Jan 19]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:18989/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Perović I1. Uticaj primene jonskih aktivatora na bazi d-metala Zn, Co, Cu, Ni, Mo i laserskog zračenja na energetsku efikasnost procesa dobijanja vodonika alkalnom elektrolizom. [Thesis]. Univerzitet u Beogradu; 2018. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:18989/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Minnesota

11. Gage, Thomas. Probing the Crystallization Process and Morphology of Thin Films of Yttrium Iron Garnet on Non-Garnet Substrates with in situ TEM Methods.

Degree: PhD, Material Science and Engineering, 2018, University of Minnesota

URL: http://hdl.handle.net/11299/206280

► Thin films of yttrium iron garnet (YIG) are of high interest for promising photonics and spintronics applications. Integration challenges with current silicon processing technology have… (more)

Subjects/Keywords: in situ crystallization; laser annealing; TEM; UEM; YIG

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APA (6^th Edition):

Gage, T. (2018). Probing the Crystallization Process and Morphology of Thin Films of Yttrium Iron Garnet on Non-Garnet Substrates with in situ TEM Methods. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/206280

Chicago Manual of Style (16^th Edition):

Gage, Thomas. “Probing the Crystallization Process and Morphology of Thin Films of Yttrium Iron Garnet on Non-Garnet Substrates with in situ TEM Methods.” 2018. Doctoral Dissertation, University of Minnesota. Accessed January 19, 2021. http://hdl.handle.net/11299/206280.

MLA Handbook (7^th Edition):

Gage, Thomas. “Probing the Crystallization Process and Morphology of Thin Films of Yttrium Iron Garnet on Non-Garnet Substrates with in situ TEM Methods.” 2018. Web. 19 Jan 2021.

Vancouver:

Gage T. Probing the Crystallization Process and Morphology of Thin Films of Yttrium Iron Garnet on Non-Garnet Substrates with in situ TEM Methods. [Internet] [Doctoral dissertation]. University of Minnesota; 2018. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11299/206280.

Council of Science Editors:

Gage T. Probing the Crystallization Process and Morphology of Thin Films of Yttrium Iron Garnet on Non-Garnet Substrates with in situ TEM Methods. [Doctoral Dissertation]. University of Minnesota; 2018. Available from: http://hdl.handle.net/11299/206280

University of Minnesota

12. Schliep, Karl. The Investigation Of New Magnetic Materials And Their Phenomena Using Ultrafast Fresnel Transmission Electron Microscopy.

Degree: PhD, Material Science and Engineering, 2017, University of Minnesota

URL: http://hdl.handle.net/11299/191448

► State-of-the-art technology drives scientific progress, pushing the boundaries of our current understanding of fundamental processes and mechanisms. Our continual scientific advancement is hindered only by… (more)

▼ State-of-the-art technology drives scientific progress, pushing the boundaries of our current understanding of fundamental processes and mechanisms. Our continual scientific advancement is hindered only by what we can observe and experimentally verify; thus, it is reasonable to assert that instrument development and improvement is the cornerstone for technological and intellectual growth. For example, the invention of transmission electron microscopy (TEM) allowed us to observe nanoscale phenomena for the first time in the 1930s and even now it is invaluable in the development of smaller, faster electronics. As we uncover more about the fundamentals of nanoscale phenomena, we have realized that images alone reveal only a snapshot of the story; to continue progressing we need a way to observe the entire scene unfold (e.g. how defects affect the flow of current across a transistor or how thermal energy propagates in nanoscale systems like graphene). Recently, by combining the spatial resolution of a TEM with the temporal resolution of ultrafast lasers, ultrafast electron microscopy  or microscope  (UEM) has allowed us to simultaneously observe transient nanoscale phenomena at ultrafast timescales. Ultrafast characterization techniques allow for the investigation of a new realm of previously unseen phenomenon inherent to the transient electronic, magnetic, and structural properties of materials. However, despite the progress made in ultrafast techniques, capturing the nanoscale spatial sub-ns temporal mechanisms and phenomenon at play in magnetic materials (especially during the operation of magnetic devices) has only recently become possible using UEM. With only a handful of instruments available, magnetic characterization using UEM is far from commonplace and any advances made are sparsely reported, and further, specific to the individual instrument. In this dissertation, I outline the development of novel magnetic materials and the establishment of a UEM lab at the University of Minnesota and how I explored the application of it toward the investigation of magnetic materials. In my discussion of UEM, I have made a concerted effort to highlight the unique challenges faced when getting a UEM lab running so that new researchers may circumvent these challenges. Of note in my graduate studies, I assisted in the development of three different magnetic material systems, strained Fe nanoparticles for permanent magnetic applications, FePd for applications in spintronic devices, and a rare-earth transition-metal (RE-TM) alloy that exhibits new magneto-optic phenomena. In studying the morphological and magnetic effects of lasers on these RE-TM alloys using the in situ laser irradiation capabilities of UEM along with standard TEM techniques and computational modeling, I uncovered a possible limitation in their utility for memory applications. Furthermore, with the aid of particle tracing software, I was able to optimize our UEM system for magnetic imaging and demonstrate the resolution of ultrafast demagnetization…

Subjects/Keywords: Electron Microscopy; In situ; Magnetism; Pulsed Laser; Ultrafast

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Schliep, K. (2017). The Investigation Of New Magnetic Materials And Their Phenomena Using Ultrafast Fresnel Transmission Electron Microscopy. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/191448

Chicago Manual of Style (16^th Edition):

Schliep, Karl. “The Investigation Of New Magnetic Materials And Their Phenomena Using Ultrafast Fresnel Transmission Electron Microscopy.” 2017. Doctoral Dissertation, University of Minnesota. Accessed January 19, 2021. http://hdl.handle.net/11299/191448.

MLA Handbook (7^th Edition):

Schliep, Karl. “The Investigation Of New Magnetic Materials And Their Phenomena Using Ultrafast Fresnel Transmission Electron Microscopy.” 2017. Web. 19 Jan 2021.

Vancouver:

Schliep K. The Investigation Of New Magnetic Materials And Their Phenomena Using Ultrafast Fresnel Transmission Electron Microscopy. [Internet] [Doctoral dissertation]. University of Minnesota; 2017. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11299/191448.

Council of Science Editors:

Schliep K. The Investigation Of New Magnetic Materials And Their Phenomena Using Ultrafast Fresnel Transmission Electron Microscopy. [Doctoral Dissertation]. University of Minnesota; 2017. Available from: http://hdl.handle.net/11299/191448

University of New South Wales

13. Jahangir, Solmaz. In-situ study of solid state dewetting in metallic thin films.

Degree: Materials Science & Engineering, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/57585 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44124/SOURCE02?view=true

► Thin films are fabricated in conditions far from the equilibrium, and they bear a high surface to volume ratio. Therefore, when thermally activated, they gain… (more)

▼ Thin films are fabricated in conditions far from the equilibrium, and they bear a high surface to volume ratio. Therefore, when thermally activated, they gain the required atomic mobility to reduce their free energy associated with surfaces, by transforming to a stable morphology of isolated islands. This phenomenon is called “solid-state dewetting”. Solid-state dewetting of thin films is a source of failure in microelectronic applications.In the first part of this thesis, we present an in-situ investigation on the integrity of a polycrystalline Pt thin film which was enhanced by applying ZnO as an adhesion layer between the film and the Si substrate. Besides the typical morphological evolution during dewetting of a continuous thin film e.g. hillocking, hole formation, hole growth and formation of isolated islands, we report on two distinct events that were captured in real-time. Sublimation of ZnO and secondary hole formation via break up of blisters of Pt thin film, in this case at ~ 1053 K, and formation of an amorphous platinum silicide phase and Pt3Si intermetallic phase in later stages of dewetting. We do however highlight that these observations are for films exposed to high temperatures under high vacuum conditions and caution must be exercised when applying these observations to other systems.Moreover, solid-state dewetting can lead to the formation of complex submicron or nanostructures, depending on the original geometry of the film. In single crystal thin films, due to the structural symmetry and anisotropic surface properties, the ordered assembly of the islands occurs spontaneously during dewetting. There is an increasing interest in controlling the morphology of dewetting structures due to higher demand for the scaled-down devices. The morphological characteristics of these structures are manifested by instabilities that happen simultaneously during dewetting. Precise identification of these instabilities leads to an enhanced inference of the underpinning kinetic mechanisms that govern the formation of complex dewetting morphologies. In the second part of the thesis, we use pre-patterned single crystal Ni film on single crystal MgO substrate as a model system to study the effect of various parameters on final morphology of dewetted structures. More specifically, we investigate the effect of film's edge roughness, the in-plane crystallographic orientation of film patches, annealing temperature and annealing ambient on fingering instability. We also demonstrate that solid-state dewetting can be exploited as a self-assembly method to achieve the desired morphology via introducing a template to the edges of patches of single crystal Ni film. The template is systematically designed to facilitate the fingering instability and control the spacing of void fingers. Advisors/Committee Members: Valanoor, Nagarajan, Materials Science & Engineering, Faculty of Science, UNSW, Ferry, Michael, Materials Science & Engineering, Faculty of Science, UNSW.

Subjects/Keywords: In-situ Characterisation; Dewetting; Thin films; Confocal laser microscopy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jahangir, S. (2017). In-situ study of solid state dewetting in metallic thin films. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/57585 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44124/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Jahangir, Solmaz. “In-situ study of solid state dewetting in metallic thin films.” 2017. Doctoral Dissertation, University of New South Wales. Accessed January 19, 2021. http://handle.unsw.edu.au/1959.4/57585 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44124/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Jahangir, Solmaz. “In-situ study of solid state dewetting in metallic thin films.” 2017. Web. 19 Jan 2021.

Vancouver:

Jahangir S. In-situ study of solid state dewetting in metallic thin films. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2021 Jan 19]. Available from: http://handle.unsw.edu.au/1959.4/57585 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44124/SOURCE02?view=true.

Council of Science Editors:

Jahangir S. In-situ study of solid state dewetting in metallic thin films. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/57585 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44124/SOURCE02?view=true

University of Manchester

14. Yue, Liyang. Laser cleaning of slotted components.

Degree: PhD, 2013, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/laser-cleaning-of-slotted-components(c66c7114-d1d7-40be-a2c9-b99329435a43).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570281

► Laser cleaning is a non contact, highly controllable process for the removal of contaminants from a surface with minimum or no damage to the substrate… (more)

Subjects/Keywords: 621.36; laser; laser cleaning; slot; excimer laser; finite element method

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APA (6^th Edition):

Yue, L. (2013). Laser cleaning of slotted components. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/laser-cleaning-of-slotted-components(c66c7114-d1d7-40be-a2c9-b99329435a43).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570281

Chicago Manual of Style (16^th Edition):

Yue, Liyang. “Laser cleaning of slotted components.” 2013. Doctoral Dissertation, University of Manchester. Accessed January 19, 2021. https://www.research.manchester.ac.uk/portal/en/theses/laser-cleaning-of-slotted-components(c66c7114-d1d7-40be-a2c9-b99329435a43).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570281.

MLA Handbook (7^th Edition):

Yue, Liyang. “Laser cleaning of slotted components.” 2013. Web. 19 Jan 2021.

Vancouver:

Yue L. Laser cleaning of slotted components. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2021 Jan 19]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/laser-cleaning-of-slotted-components(c66c7114-d1d7-40be-a2c9-b99329435a43).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570281.

Council of Science Editors:

Yue L. Laser cleaning of slotted components. [Doctoral Dissertation]. University of Manchester; 2013. Available from: https://www.research.manchester.ac.uk/portal/en/theses/laser-cleaning-of-slotted-components(c66c7114-d1d7-40be-a2c9-b99329435a43).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570281

15. Leal, Aline de Medeiros. Avaliação da citogenética convencional e molecular em portadores de leucemia promielocítica aguda no Serviço de Hematologia do Hospital das Clínicas da Faculdade de Medicina da USP.

Degree: PhD, Hematologia, 2009, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/5/5136/tde-28082009-090853/ ;

►

INTRODUÇÃO: A leucemia promielocítica aguda (LPA) é um subtipo distinto de leucemia mielóide aguda (LMA), caracterizado pela presença de um acúmulo de promielócitos anormais na… (more)

▼

INTRODUÇÃO: A leucemia promielocítica aguda (LPA) é um subtipo distinto de leucemia mielóide aguda (LMA), caracterizado pela presença de um acúmulo de promielócitos anormais na medula óssea e/ou sangue periférico, riscos de coagulopatias e por alterações cromossômicas estruturais envolvendo sempre o locus gênico para o receptor alfa do ácido retinóico (RAR). Corresponde morfologicamente aos subtipos M3 e M3variante de LMA, segundo a Classificação Franco- Américo- Britânica (FAB) e ao subtipo de LMA associada à translocação recíproca e balanceada entre os cromossomos 15 e 17[t(15;17)] e variantes, segundo a classificação da Organização Mundial de Saúde. O curso clínico da LPA tem sido modificado, nos últimos anos, de uma leucemia aguda rapidamente fatal para um dos mais curáveis subtipos de LMA. A introdução de agentes terapêuticos que atuam diretamente na lesão molecular, como o ATRA e o Trióxido de Arsênico, teve grande impacto na sobrevida da LPA. A eficácia do tratamento é dependente do rearranjo genético presente nas células leucêmicas, o diagnóstico morfológico é sugestivo da alteração genética, devendo ser rapidamente confirmado por técnicas de citogenética molecular. MÉTODOS: Utilizando a citogenética convencional e molecular (FISH) com sondas de fusão para o rearranjo PML-RAR e de ruptura para o gene RAR, analisou-se 62 pacientes portadores de LPA, diagnosticados por estudo morfológico/imunofetípico no HC-FM/USP entre os anos de 1997 a 2006. RESULTADOS: Dos 62 pacientes analisados, 37 (59,7%) apresentaram a t(15;17)(q22;q21) visível no cariótipo; destes, 26 (42,0%) apresentaram a t(15;17) como anormalidade clonal isolada, 10 (16,1%) apresentaram outras alterações cromossômicas clonais em adição a t(15;17) e um paciente (1,6%) apresentou uma variante complexa da t(15;17). Dezoito pacientes (29%) tiveram a confirmação da presença da t(15;17)-rearranjo PML-RAR através da técnica de FISH-fusão e sete (11,3%) não apresentaram ruptura no RAR. Ausência de sangramento ao diagnóstico (p<0,02) e a presença de morfologia M3v (p<0,01) se associaram à ausência ruptura no RAR. A taxa de sobrevida global (SG) em dois anos, entre os 55 pacientes que apresentaram a t(15;17)-rearranjo- PML-RAR ao diagnóstico citogenético, foi de 49,28%. Duas variáveis prognósticas mostraram estar estatisticamente relacionadas à pior taxa de SG nesse estudo: idade acima de 60 anos e presença de morfologia de M3v. A taxa de Sobrevida Livre de Doença em dois anos nesses pacientes foi de 72,10%.CONCLUSÃO: Cerca de 11% dos pacientes diagnosticados para LPA, através de estudo morfológico/imunofenotípico, não apresentaram diagnóstico citogenético compatível para esta doença. Na ausência de sangramento ao diagnóstico e na presença de morfologia M3v o teste de FISH deve ser priorizado.

INTRODUCTION: Acute promyelocytic leukemia (APL) is a distinct subtype of acute myeloid leukemia (AML), characterized by clonal expansion of myeloid precursors blocked at promyelocytic stage, risks of coagulopathy and presence of chromosomal translocations involving…

Advisors/Committee Members: Velloso, Elvira Deolinda Rodrigues Pereira.

Subjects/Keywords: Análise citogenética; Cytogenetic analysis; Fluorescence; Hibridização in situ por fluorescência; In Situ hybridization; Leucemia promielocítica aguda; Leukemia; Promyelocytic acute

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Leal, A. d. M. (2009). Avaliação da citogenética convencional e molecular em portadores de leucemia promielocítica aguda no Serviço de Hematologia do Hospital das Clínicas da Faculdade de Medicina da USP. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/5/5136/tde-28082009-090853/ ;

Chicago Manual of Style (16^th Edition):

Leal, Aline de Medeiros. “Avaliação da citogenética convencional e molecular em portadores de leucemia promielocítica aguda no Serviço de Hematologia do Hospital das Clínicas da Faculdade de Medicina da USP.” 2009. Doctoral Dissertation, University of São Paulo. Accessed January 19, 2021. http://www.teses.usp.br/teses/disponiveis/5/5136/tde-28082009-090853/ ;.

MLA Handbook (7^th Edition):

Leal, Aline de Medeiros. “Avaliação da citogenética convencional e molecular em portadores de leucemia promielocítica aguda no Serviço de Hematologia do Hospital das Clínicas da Faculdade de Medicina da USP.” 2009. Web. 19 Jan 2021.

Vancouver:

Leal AdM. Avaliação da citogenética convencional e molecular em portadores de leucemia promielocítica aguda no Serviço de Hematologia do Hospital das Clínicas da Faculdade de Medicina da USP. [Internet] [Doctoral dissertation]. University of São Paulo; 2009. [cited 2021 Jan 19]. Available from: http://www.teses.usp.br/teses/disponiveis/5/5136/tde-28082009-090853/ ;.

Council of Science Editors:

Leal AdM. Avaliação da citogenética convencional e molecular em portadores de leucemia promielocítica aguda no Serviço de Hematologia do Hospital das Clínicas da Faculdade de Medicina da USP. [Doctoral Dissertation]. University of São Paulo; 2009. Available from: http://www.teses.usp.br/teses/disponiveis/5/5136/tde-28082009-090853/ ;

16. Lança, Luís Jorge Oliveira Carrasco. Radiological imaging in digital systems: the effect of exposure parameters in diagnostic quality and patient dose .

Degree: 2011, Universidade de Aveiro

URL: http://hdl.handle.net/10773/3950

► Esta tese pretende contribuir para o estudo e análise dos factores relacionados com as técnicas de aquisição de imagens radiológicas digitais, a qualidade diagnóstica e… (more)

▼ Esta tese pretende contribuir para o estudo e análise dos factores relacionados com as técnicas de aquisição de imagens radiológicas digitais, a qualidade diagnóstica e a gestão da dose de radiação em sistema de radiologia digital. A metodologia encontra-se organizada em duas componentes. A componente observacional, baseada num desenho do estudo de natureza retrospectiva e transversal. Os dados recolhidos a partir de sistemas CR e DR permitiram a avaliação dos parâmetros técnicos de exposição utilizados em radiologia digital, a avaliação da dose absorvida e o índice de exposição no detector. No contexto desta classificação metodológica (retrospectiva e transversal), também foi possível desenvolver estudos da qualidade diagnóstica em sistemas digitais: estudos de observadores a partir de imagens arquivadas no sistema PACS. A componente experimental da tese baseou-se na realização de experiências em fantomas para avaliar a relação entre dose e qualidade de imagem. As experiências efectuadas permitiram caracterizar as propriedades físicas dos sistemas de radiologia digital, através da manipulação das variáveis relacionadas com os parâmetros de exposição e a avaliação da influência destas na dose e na qualidade da imagem. Utilizando um fantoma contrastedetalhe, fantomas antropomórficos e um fantoma de osso animal, foi possível objectivar medidas de quantificação da qualidade diagnóstica e medidas de detectabilidade de objectos. Da investigação efectuada, foi possível salientar algumas conclusões. As medidas quantitativas referentes à performance dos detectores são a base do processo de optimização, permitindo a medição e a determinação dos parâmetros físicos dos sistemas de radiologia digital. Os parâmetros de exposição utilizados na prática clínica mostram que a prática não está em conformidade com o referencial Europeu. Verifica-se a necessidade de avaliar, melhorar e implementar um padrão de referência para o processo de optimização, através de novos referenciais de boa prática ajustados aos sistemas digitais. Os parâmetros de exposição influenciam a dose no paciente, mas a percepção da qualidade de imagem digital não parece afectada com a variação da exposição. Os estudos que se realizaram envolvendo tanto imagens de fantomas como imagens de pacientes mostram que a sobreexposição é um risco potencial em radiologia digital. A avaliação da qualidade diagnóstica das imagens mostrou que com a variação da exposição não se observou degradação substancial da qualidade das imagens quando a redução de dose é efectuada. Propõe-se o estudo e a implementação de novos níveis de referência de diagnóstico ajustados aos sistemas de radiologia digital. Como contributo da tese, é proposto um modelo (STDI) para a optimização de sistemas de radiologia digital. Advisors/Committee Members: Silva, Augusto Marques Ferreira da (advisor), Alves, Eduardo Jorge da Costa (advisor).

Subjects/Keywords: Radiologia assistida por computador; Diagnóstico; Qualidade

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lança, L. J. O. C. (2011). Radiological imaging in digital systems: the effect of exposure parameters in diagnostic quality and patient dose . (Thesis). Universidade de Aveiro. Retrieved from http://hdl.handle.net/10773/3950

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lança, Luís Jorge Oliveira Carrasco. “Radiological imaging in digital systems: the effect of exposure parameters in diagnostic quality and patient dose .” 2011. Thesis, Universidade de Aveiro. Accessed January 19, 2021. http://hdl.handle.net/10773/3950.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lança, Luís Jorge Oliveira Carrasco. “Radiological imaging in digital systems: the effect of exposure parameters in diagnostic quality and patient dose .” 2011. Web. 19 Jan 2021.

Vancouver:

Lança LJOC. Radiological imaging in digital systems: the effect of exposure parameters in diagnostic quality and patient dose . [Internet] [Thesis]. Universidade de Aveiro; 2011. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10773/3950.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lança LJOC. Radiological imaging in digital systems: the effect of exposure parameters in diagnostic quality and patient dose . [Thesis]. Universidade de Aveiro; 2011. Available from: http://hdl.handle.net/10773/3950

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oklahoma State University

17. Singh, Sarabpreet. Micromachining of Polyurethane (Pu) Polymer Using a Krf Excimer Laser (248nm).

Degree: Mechanical & Aerospace Engineering, 2011, Oklahoma State University

URL: http://hdl.handle.net/11244/10066

► Excimer laser micromachining has generated considerable research interest leading to numerous commercial applications in the last decade. Polyurethane (PU) polymer, due to its biocompatibility, weather… (more)

▼ Excimer laser micromachining has generated considerable research interest leading to numerous commercial applications in the last decade. Polyurethane (PU) polymer, due to its biocompatibility, weather resistance, and favorable physical properties, such as good flex-life, temperature resistance, electrical insulation and tear resistance finds a number of applications in medical implants, protective coatings, and as a prototype material for structural components in MEMS devices. An Excimer laser (wavelength = 248 nm, FWHM = 25 ns) is employed in this research work for micromachining of polyurethane (PU) polymer and pattern design for some potential MEMS applications. The main objective of this research is to establish a fundamental understanding of ablation mechanism in polyurethane (PU) polymer. The effect of various operating parameters, such as fluence per unit area, energy per pulse, number of pulses, repetition rates, and environment on the resulting geometries and ablation behavior are investigated. Micromachining is conducted in air and under water environments with variation in mask sizes and pattern geometries. Microgears (up to 360 μm diameter) are etched on the surface of polyurethane with several similar geometries used in MEMS devices, such as microfluidic channels, and microcircuits. It was observed that, for air environment, the ablation rate is 0.18 μm/pulse, and for underwater environment, the ablation rate is 0.07 μm/pulse (underwater ablation threshold: 0.10 J/cm²). The relationship was developed between wall taper angles behavior of the ablated regions with process parameters, which concluded low taper angles (~32°) for in air as compared to high taper angles (~65°) with underwater micromachining. The relationship between mask size and resulting seam quality, seam width and ablation depth for pattern generation was developed and analyzed. The experimental results for air and under water micromachining demonstrate that the ablation mechanism differs in polymers depending upon fluence (J/cm²), repetition rate (Hz), and working environment (in air or underwater). A combination of photo-thermal and photo-chemical ablation mechanism was attributed in the material removal process for polyurethane (PU) polymer. However, to be able to successfully and effectively produce MEMS devices, further research into the micromachining of polymers is required.

Subjects/Keywords: excimer laser; krf laser; micromachining; pattern; polymer; polyurethane

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Singh, S. (2011). Micromachining of Polyurethane (Pu) Polymer Using a Krf Excimer Laser (248nm). (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/10066

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Singh, Sarabpreet. “Micromachining of Polyurethane (Pu) Polymer Using a Krf Excimer Laser (248nm).” 2011. Thesis, Oklahoma State University. Accessed January 19, 2021. http://hdl.handle.net/11244/10066.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Singh, Sarabpreet. “Micromachining of Polyurethane (Pu) Polymer Using a Krf Excimer Laser (248nm).” 2011. Web. 19 Jan 2021.

Vancouver:

Singh S. Micromachining of Polyurethane (Pu) Polymer Using a Krf Excimer Laser (248nm). [Internet] [Thesis]. Oklahoma State University; 2011. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11244/10066.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Singh S. Micromachining of Polyurethane (Pu) Polymer Using a Krf Excimer Laser (248nm). [Thesis]. Oklahoma State University; 2011. Available from: http://hdl.handle.net/11244/10066

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Sul

18. Koppe, Daniela Cerqueira. Identificação de neoplasia intraepitelial anal em mulheres com neoplasia genital.

Degree: 2010, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/78496

►

Introdução: A incidência de câncer anal vem aumentando nas últimas décadas principalmente em determinados grupos de risco como pacientes HIV positivos e homens homossexuais e… (more)

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Introdução: A incidência de câncer anal vem aumentando nas últimas décadas principalmente em determinados grupos de risco como pacientes HIV positivos e homens homossexuais e bissexuais. A neoplasia intraepitelial anal (NIA) representa a lesão precursora do câncer anal e tem demonstrado clara associação com o papilomavírus humano (HPV) de alto risco. Mulheres com neoplasia intraepitelial ou carcinoma invasor genital parecem ter um risco aumentado para câncer anal. O objetivo deste estudo é determinar a prevalência de neoplasia intraepitelial anal neste grupo de mulheres. Métodos: Estudo transversal onde 106 mulheres imunocompetentes com diagnóstico histológico de neoplasia intraepitelial ou câncer genital e 74 pacientes sem neoplasia genital foram submetidas à anuscopia de alta resolução com biópsia de áreas alteradas. Resultados: A prevalência geral de NIA na amostra foi 6,6%. No grupo de mulheres com neoplasia genital foi 10,4% (IC 95%, 5,6 a 17,3%) e 1,4% (IC 95%, 0,07 a 6,5%) nas mulheres sem esta condição (p=0,016). A razão de prevalência encontrada foi 7,68 (IC 95%, 1,01 a 58,21) e a razão de chances foi 8,45 (IC 95%, 1,07 a 66,97). Conclusão: A prevalência de NIA foi maior em mulheres com neoplasia intraepitelial ou câncer invasor genital.

Background: In the last decade the incidence of anal cancer is increasing especially in high risk groups as those infected with the human immunodeficiency virus (HIV) and men who have sex with men (MSM). Anal intraepithelial neoplasia (AIN) is believed to be a precursor of anal cancer. It appears to be related to high-risk human papillomavirus (HPV). Women with genital intraepithelial neoplasia or cancer have shown to be at increased risk for anal cancer. The aim of this study is to determine the prevalence of anal intraepithelial neoplasia in this group of women. Methods: In a cross sectional study, 106 imunocompetent women with histopathological diagnosis of genital intraepithelial neoplasia or cancer and 74 women without gynecologic neoplasia underwent to high-resolution anoscopy with biopsy of visible lesions. Results: The overall prevalence of AIN was 6.6%. In women with genital neoplasia it was 10.4% (95% CI, 5.6 to 17.3%) and 1.4% (95% CI, 0.07 to 6.5%) in women without genital neoplasia (p=0.016). The prevalence ratio was 7.68 (95% CI, 1.01 to 58.21) and the odds ratio 8.45 (IC 95%, 1.07 a 66.97). Conclusion: The prevalence of AIN was higher in women with genital intraepithelial neoplasia or cancer.

Advisors/Committee Members: Fagundes, Renato Borges.

Subjects/Keywords: Neoplasias do ânus; Neoplasias dos genitais femininos; Carcinoma in situ; Prevalência; Infecções por papillomavirus

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Koppe, D. C. (2010). Identificação de neoplasia intraepitelial anal em mulheres com neoplasia genital. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/78496

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Koppe, Daniela Cerqueira. “Identificação de neoplasia intraepitelial anal em mulheres com neoplasia genital.” 2010. Thesis, Universidade do Rio Grande do Sul. Accessed January 19, 2021. http://hdl.handle.net/10183/78496.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Koppe, Daniela Cerqueira. “Identificação de neoplasia intraepitelial anal em mulheres com neoplasia genital.” 2010. Web. 19 Jan 2021.

Vancouver:

Koppe DC. Identificação de neoplasia intraepitelial anal em mulheres com neoplasia genital. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2010. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10183/78496.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Koppe DC. Identificação de neoplasia intraepitelial anal em mulheres com neoplasia genital. [Thesis]. Universidade do Rio Grande do Sul; 2010. Available from: http://hdl.handle.net/10183/78496

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

19. Stoppe, Nancy de Castro, 1963-. Prospecção de marcadores para o rastreamento de fontes de contaminação fecal em águas superficiais do Estado de São Paulo: Markers prospection for fecal contamination source tracking on superficial waters in São Paulo State, Brazil.

Degree: 2014, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/316933

► Abstract: The fecal contamination of water resources is the main cause of enteric waterborne diseases all over the world. Traditional indicator methods used in the… (more)

▼ Abstract: The fecal contamination of water resources is the main cause of enteric waterborne diseases all over the world. Traditional indicator methods used in the water microbiological quality assessment are not able to identify fecal contamination source. This work intended to prospect molecular markers in hosts and track them in water samples to identify pollution sources in surface waters in the São Paulo State, Brazil. Two library-dependent methods with E. coli strains isolated from different hosts and water samples were used, a genotypic typing method (E. coli phylogenetic groups) and a phenotypic typing method (MALDI-TOF/MS). A library-independent method using 454 pyrosequencing of hypervariable16S rRNA gene V3 region was used in DNA from feces and water samples. Phylogenetic groups were used as a tool in host classification and correspondence analysis showed feeding habits clusters. The classification of environmental samples revealed higher frequencies of subgroups A1 and B23 in rivers impacted by human pollution sources, while subgroups D1 and D2 were associated with pristine sites, and subgroup B1 with domestic animal sources, indicating their use as a first screening for pollution source identification. A simple classification is proposed based on phylogenetic subgroup distribution using the w-clique metric, enabling differentiation of polluted and unpolluted sites. Protein profiles of E. coli strains isolated from host and water samples were analyzed by MALDI-TOF/MS. Specific host biomarkers were identified and their use was indicated as a potential tool for the source tracking. Validation with E. coli strains isolated from rivers and reservoirs showed that water samples presented markers from different hosts, suggesting these rivers have mixed sources of fecal contamination. Sequencing of the 16S rRNA V3 region in stool samples (human and bovine) and water showed 4296 operational taxonomic units (OTUs). The greatest diversity was observed in samples of cattle feces and the smallest one in the pristine water sample. Firmicutes was the predominant group in samples of human feces, while in the most common bovine feces are the Firmicutes and Bacteroidetes. The interaction network showed that the stool samples had the greatest diversity and, among them, the water sample with human pollution source showed the highest diversity. The LEfSe method was used to identify host biomarkers. As human biomarkers, Actinobacteria, Betaproteobacteria and Firmicutes were identified and for cattle the potential markers are Bacteroidetes, Tenericutes and Spirochaetes. Host-specific markers were identified, but they were not found in water samples suggesting that the used tools either do not have the resolution to identify markers in environmental samples or contamination in water bodies is mixed. Additionally, as the host-specific markers were isolated from non-autochthonous micro-organisms, they could be affected by the environmental adverse effects such as physical-chemical factors and competition with native organisms Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Ottoboni, Laura Maria Mariscal, 1955- (advisor), Torres, Tatiana Teixeira (coadvisor), Universidade Estadual de Campinas. Instituto de Biologia (institution), Programa de Pós-Graduação em Genética e Biologia Molecular (nameofprogram), Vasconcelos, Suzan Pantarotto de (committee member), Razzolini, Maria Tereza Pepe (committee member), Oliveira, Valeria Maia de (committee member), Paulino, Luciana Campos (committee member).

Subjects/Keywords: Água - Poluição; Escherichia coli; Espectrometria de massas por ionização e dessorção a laser assistida por matriz; RNA ribossômico 16S; Sequenciamento de nucleotídeos em larga escala; Water - Pollution; Escherichia coli; Matrix-assisted laser desorption-ionization mass spectrometry; RNA, Ribosomal, 16S; High-throughput nucleotide sequencing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Stoppe, Nancy de Castro, 1. (2014). Prospecção de marcadores para o rastreamento de fontes de contaminação fecal em águas superficiais do Estado de São Paulo: Markers prospection for fecal contamination source tracking on superficial waters in São Paulo State, Brazil. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/316933

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stoppe, Nancy de Castro, 1963-. “Prospecção de marcadores para o rastreamento de fontes de contaminação fecal em águas superficiais do Estado de São Paulo: Markers prospection for fecal contamination source tracking on superficial waters in São Paulo State, Brazil.” 2014. Thesis, Universidade Estadual de Campinas. Accessed January 19, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316933.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stoppe, Nancy de Castro, 1963-. “Prospecção de marcadores para o rastreamento de fontes de contaminação fecal em águas superficiais do Estado de São Paulo: Markers prospection for fecal contamination source tracking on superficial waters in São Paulo State, Brazil.” 2014. Web. 19 Jan 2021.

Vancouver:

Stoppe, Nancy de Castro 1. Prospecção de marcadores para o rastreamento de fontes de contaminação fecal em águas superficiais do Estado de São Paulo: Markers prospection for fecal contamination source tracking on superficial waters in São Paulo State, Brazil. [Internet] [Thesis]. Universidade Estadual de Campinas; 2014. [cited 2021 Jan 19]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/316933.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stoppe, Nancy de Castro 1. Prospecção de marcadores para o rastreamento de fontes de contaminação fecal em águas superficiais do Estado de São Paulo: Markers prospection for fecal contamination source tracking on superficial waters in São Paulo State, Brazil. [Thesis]. Universidade Estadual de Campinas; 2014. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/316933

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

20. Falco, Luís Fernando Godoy, 1988-. Estudo comparativo entre ativos farmacêuticos e espécies relacionadas utilizando imageamento obtido por espectrometria de massas-MALDI = qualidade versus adulteração em comprimidos de sildenafila = A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry: quality vs. adulterations in sildenafil tablets: A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry : quality vs. adulterations in sildenafil tablets.

Degree: 2018, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331843

► Abstract: Falsified drugs are an endemic problem worldwide that results in both monetary and health-related losses. Developing fast and reliable methods that are able to… (more)

Subjects/Keywords: Medicamentos falsificados; Medicamentos - Análise; Espectrometria de massas; Espectrometria de massas por ionização e dessorção a laser assistida por matriz; Counterfeit drugs; Drugs, Analysis; Mass spectrometry; Spectrometry, Mass; Matrix-assisted laser desorption-ionization

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Falco, Luís Fernando Godoy, 1. (2018). Estudo comparativo entre ativos farmacêuticos e espécies relacionadas utilizando imageamento obtido por espectrometria de massas-MALDI = qualidade versus adulteração em comprimidos de sildenafila = A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry: quality vs. adulterations in sildenafil tablets: A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry : quality vs. adulterations in sildenafil tablets. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/331843

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Falco, Luís Fernando Godoy, 1988-. “Estudo comparativo entre ativos farmacêuticos e espécies relacionadas utilizando imageamento obtido por espectrometria de massas-MALDI = qualidade versus adulteração em comprimidos de sildenafila = A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry: quality vs. adulterations in sildenafil tablets: A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry : quality vs. adulterations in sildenafil tablets.” 2018. Thesis, Universidade Estadual de Campinas. Accessed January 19, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/331843.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Falco, Luís Fernando Godoy, 1988-. “Estudo comparativo entre ativos farmacêuticos e espécies relacionadas utilizando imageamento obtido por espectrometria de massas-MALDI = qualidade versus adulteração em comprimidos de sildenafila = A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry: quality vs. adulterations in sildenafil tablets: A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry : quality vs. adulterations in sildenafil tablets.” 2018. Web. 19 Jan 2021.

Vancouver:

Falco, Luís Fernando Godoy 1. Estudo comparativo entre ativos farmacêuticos e espécies relacionadas utilizando imageamento obtido por espectrometria de massas-MALDI = qualidade versus adulteração em comprimidos de sildenafila = A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry: quality vs. adulterations in sildenafil tablets: A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry : quality vs. adulterations in sildenafil tablets. [Internet] [Thesis]. Universidade Estadual de Campinas; 2018. [cited 2021 Jan 19]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331843.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Falco, Luís Fernando Godoy 1. Estudo comparativo entre ativos farmacêuticos e espécies relacionadas utilizando imageamento obtido por espectrometria de massas-MALDI = qualidade versus adulteração em comprimidos de sildenafila = A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry: quality vs. adulterations in sildenafil tablets: A comparative study between an active pharmaceutical ingredient and its related species using MALDI imaging spectrometry : quality vs. adulterations in sildenafil tablets. [Thesis]. Universidade Estadual de Campinas; 2018. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331843

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

21. Xu, Yiguo. Détection quasi-in situ de nanoparticules par incandescence induite par laser pendant la synthèse par dépôt chimique en phase vapeur de nanotubes de carbone : Quasi-in-situ detection of nanoparticles by laser-induced incandescence during chemical vapor deposition synthesis of carbon nanotubes.

Degree: Docteur es, Science des Matériaux, 2018, Université Paris-Saclay (ComUE)

URL: http://www.theses.fr/2018SACLC070

►

Ce travail contribue à la quasi-in-situ détection des nanoparticules par la technique d’incandescence induite par laser (LII) pendant le dépôt chimique en phase vapeur avec… (more)

▼

Ce travail contribue à la quasi-in-situ détection des nanoparticules par la technique d’incandescence induite par laser (LII) pendant le dépôt chimique en phase vapeur avec catalyseur flottant (FCCVD) de nanotubes de carbone. Premièrement, la microscopie électronique en transmission (MET) à haute résolution était utilisé pour caractériser la nature et la taille des nanoparticules. Le signal théorique de LII a été simulé en considérant la densité des nanoparticules, la capacité thermique et la distribution de taille, etc. La sensibilité et l’incertitude concrètes des paramètres clés sur la taille évaluée des particules pour ce modelé ont été estimées. Le modèle LII a été validé par la comparaison des résultats évalués avec ceux obtenus par la MET. Ensuite, la technique mature LII combinée avec MET a été appliquée pour étudier l’évolution des nanoparticules dans la phase gazeuse le long de l’axe du réacteur. L’influence de la température, de la concentration de ferrocène, de la source de carbone et de la proportion hydrogène sur la taille des nanoparticules a également été démontrée. Enfin, les rôles des nanoparticules dans la phase gazeuse au cours du processus de synthèse des NTC ont été discutés en corrélant les informations sur l’évolution axiale des nanoparticules et la morphologie des NTC synthétisés sur le substrat le long de l’axe du réacteur. Un modèle basé sur la thermodynamique de la nucléation des nanoparticules a été proposé pour décrire le processus de formation des nanoparticules au cours du processus DCVCF. Il est constaté que les nanoparticules asformé en phase gazeuse présentent des structures cœur-coquille avec un noyau de α-Fe et la coque de carbone. Ainsi, les nanoparticules de fer en phase gazeuse ne pourraient pas contribuer à la croissance de NTC sur le substrat à cause de l’encapsulation de carbone. En même temps, la taille des nanoparticules évaluée par LII est en bon accord avec celle-ci déterminée par MET. Cette étude, montrant les relations potentielles entre les nanoparticules flottantes et les NTCs sur le substrat, révèle une perspective importante de l’application de LII pour comprendre et améliorer le processus DCVCF.

This work contributes to the quasi-in-situdetection of nanoparticles by laser induced incandescence(LII) technique during the floating catalytic chemicalvapor deposition (FCCVD) synthesis of Carbonnanotubes.First, high resolution transmission electron microscopy(TEM) was used to characterize the nanoparticlenature and size. The theoretical LII signal was simulatedby considering the nanoparticle density, heatcapacity and size distribution, etc. A detailed sensitivityand uncertainty of the key parameters on the evaluatedparticle size for this model was estimated. TheLII model was validated by a comparison of the evaluatedresults with the ones obtained by TEM measurements.Then, the developed LII technique combinedwith TEM was applied to investigate the evolutionof nanoparticles in the gas phase along thereactor axis. The influence of the temperature,…

Advisors/Committee Members: Bai, Jinbo (thesis director).

Subjects/Keywords: Incandescence induite par laser; Nanotubes de carbone; Nanoparticules; Détection quasi-in situ; Laser induced incandescence; Carbon nanotubes; Nanoparticles; Quasi-in-situ detection

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Xu, Y. (2018). Détection quasi-in situ de nanoparticules par incandescence induite par laser pendant la synthèse par dépôt chimique en phase vapeur de nanotubes de carbone : Quasi-in-situ detection of nanoparticles by laser-induced incandescence during chemical vapor deposition synthesis of carbon nanotubes. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2018SACLC070

Chicago Manual of Style (16^th Edition):

Xu, Yiguo. “Détection quasi-in situ de nanoparticules par incandescence induite par laser pendant la synthèse par dépôt chimique en phase vapeur de nanotubes de carbone : Quasi-in-situ detection of nanoparticles by laser-induced incandescence during chemical vapor deposition synthesis of carbon nanotubes.” 2018. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 19, 2021. http://www.theses.fr/2018SACLC070.

MLA Handbook (7^th Edition):

Xu, Yiguo. “Détection quasi-in situ de nanoparticules par incandescence induite par laser pendant la synthèse par dépôt chimique en phase vapeur de nanotubes de carbone : Quasi-in-situ detection of nanoparticles by laser-induced incandescence during chemical vapor deposition synthesis of carbon nanotubes.” 2018. Web. 19 Jan 2021.

Vancouver:

Xu Y. Détection quasi-in situ de nanoparticules par incandescence induite par laser pendant la synthèse par dépôt chimique en phase vapeur de nanotubes de carbone : Quasi-in-situ detection of nanoparticles by laser-induced incandescence during chemical vapor deposition synthesis of carbon nanotubes. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2018. [cited 2021 Jan 19]. Available from: http://www.theses.fr/2018SACLC070.

Council of Science Editors:

Xu Y. Détection quasi-in situ de nanoparticules par incandescence induite par laser pendant la synthèse par dépôt chimique en phase vapeur de nanotubes de carbone : Quasi-in-situ detection of nanoparticles by laser-induced incandescence during chemical vapor deposition synthesis of carbon nanotubes. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2018. Available from: http://www.theses.fr/2018SACLC070

22. Ma, Yang. Étude de la formation et de l'activité catalytique de nanoparticules durant les premiers instants de la croissance de nanotubes de carbone par dépôt chimique en phase vapeur assisté par aérosol : Study on the formation and catalytic activity of nanoparticles in early stages of carbon nanotubes growth under aerosol-assisted chemical vapor deposition.

Degree: Docteur es, Matériaux, 2016, Université Paris-Saclay (ComUE)

URL: http://www.theses.fr/2016SACLC047

►

De par leurs propriétés remarquables, les nanotubes de carbone (NTCs) reçoivent beaucoup d’attention et de nombreuses recherches sont menées sur ces matériaux depuis les dernières… (more)

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De par leurs propriétés remarquables, les nanotubes de carbone (NTCs) reçoivent beaucoup d’attention et de nombreuses recherches sont menées sur ces matériaux depuis les dernières décennies. Le nombre d'applications envisagées mais aussi la quantité demandée de NTCs augmentent chaque année. Pour atteindre une production à grande échelle et contrôlée, il est nécessaire d'avoir une bonne compréhension des mécanismes de croissance des NTCs. Dans ce manuscrit, la formation ainsi que l'activité catalytique de nanoparticules (NPs) par dépôt chimique en phase vapeur assisté par aérosol (CVD) sont étudiées expérimentalement, pour analyser le processus d'évolution des NPs et leur relation avec les NTCs.Dans le chapitre 1, nous présentons une introduction générale sur des structures, les méthodes de synthèse, les propriétés et les applications envisagées des NTCs, ainsi que l’état de l’art concernant l’étude des mécanismes de croissance des NTCs.Dans le chapitre 2, nous décrivons le système de dépôt chimique en phase vapeur avec catalyseur flottant, ainsi que les méthodes de diagnostic in-situ/ex-situ utilisées dans cette étude. La technique d’incandescence induite par laser (LII) est particulièrement importante dans ce chapitre, car cette technique nous permet de réaliser un diagnostic in situ sur la quantité/taille des NPs déposées pendant le processus de synthèse.Dans le chapitre 3, nous présentons l'évolution des NPs lors de la synthèse ainsi que les influences des différents paramètres de CVD (température, quantité de carbone/catalyseur, composition du gaz, etc.) sur les gouttelettes et les NPs respectivement. Un modèle pour la formation de NPs est proposé à la fin de ce chapitre.Dans le chapitre 4, les résultats des expériences sur l'évolution de la composition du gaz sont révélés. Ces résultats donnent des informations concernant les réactions chimiques ayant lieu dans la phase gazeuse lors de la synthèse des NTCs.Dans le chapitre 5, une étude détaillée de l'influence des paramètres de CVD sur les produits NTCs est menée, et les relations entre les NPs et les NTC sont discutées.Pour finir, des conclusions générales ainsi que les perspectives prévues pour les travaux futurs sont présentées.

Due to the outstanding properties in various aspects, carbon nanotubes (CNTs) received worldwide attentions and intensive investigations are carried out in the last decades. While the number of applications as well as the quantity demanded of CNTs are increasing year after year, to achieve large scale production of the desired structures in a controlled way, it is highly required having a clear understanding about the CNTs growth mechanism. In this study, the formation and catalytic activity of nanoparticles (NPs) under aerosol-assisted chemical vapor deposition (CVD) is experimentally investigated, aiming to study the NPs evolution process and their relation with the CNTs products.In chapter 1, we provide a general review of CNTs structures, synthesis methods, properties as well as applications. Moreover, the current situation of…

Advisors/Committee Members: Bai, Jinbo (thesis director).

Subjects/Keywords: Nanotube de carbone; Catalytique; Nanoparticules; Dépôt chimique en phase vapeur; In-situ diagnostic; D’incandescence induite par laser; Carbon nanotube; Catalytic; Nanoparticles; Chemical vapor deposition; In-situ diagnostic; Laser-induced incandescence

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ma, Y. (2016). Étude de la formation et de l'activité catalytique de nanoparticules durant les premiers instants de la croissance de nanotubes de carbone par dépôt chimique en phase vapeur assisté par aérosol : Study on the formation and catalytic activity of nanoparticles in early stages of carbon nanotubes growth under aerosol-assisted chemical vapor deposition. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2016SACLC047

Chicago Manual of Style (16^th Edition):

Ma, Yang. “Étude de la formation et de l'activité catalytique de nanoparticules durant les premiers instants de la croissance de nanotubes de carbone par dépôt chimique en phase vapeur assisté par aérosol : Study on the formation and catalytic activity of nanoparticles in early stages of carbon nanotubes growth under aerosol-assisted chemical vapor deposition.” 2016. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 19, 2021. http://www.theses.fr/2016SACLC047.

MLA Handbook (7^th Edition):

Ma, Yang. “Étude de la formation et de l'activité catalytique de nanoparticules durant les premiers instants de la croissance de nanotubes de carbone par dépôt chimique en phase vapeur assisté par aérosol : Study on the formation and catalytic activity of nanoparticles in early stages of carbon nanotubes growth under aerosol-assisted chemical vapor deposition.” 2016. Web. 19 Jan 2021.

Vancouver:

Ma Y. Étude de la formation et de l'activité catalytique de nanoparticules durant les premiers instants de la croissance de nanotubes de carbone par dépôt chimique en phase vapeur assisté par aérosol : Study on the formation and catalytic activity of nanoparticles in early stages of carbon nanotubes growth under aerosol-assisted chemical vapor deposition. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2016. [cited 2021 Jan 19]. Available from: http://www.theses.fr/2016SACLC047.

Council of Science Editors:

Ma Y. Étude de la formation et de l'activité catalytique de nanoparticules durant les premiers instants de la croissance de nanotubes de carbone par dépôt chimique en phase vapeur assisté par aérosol : Study on the formation and catalytic activity of nanoparticles in early stages of carbon nanotubes growth under aerosol-assisted chemical vapor deposition. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2016. Available from: http://www.theses.fr/2016SACLC047

University of Alberta

23. Medina, Miguel A. Online characterization of particle based reactions by laser backscattering.

Degree: MS, Department of Chemical and Materials Engineering, 2016, University of Alberta

URL: https://era.library.ualberta.ca/files/c3484zh14q

► A fiber optic dynamic light scattering device was successfully developed for the in-situ characterization of particle size in turbid media. Currently available techniques are only… (more)

▼ A fiber optic dynamic light scattering device was successfully developed for the in-situ characterization of particle size in turbid media. Currently available techniques are only capable of performing characterizations at room temperature and are highly limited by the turbidity of the sample. In-situ particle size characterization was accomplished using the diffuse wave spectroscopy theory and time-dependent autocorrelation analysis. Using this basis for the interpretation, information regarding the particle morphology was obtained from the backscattering signals using two simultaneous lasers, of 532 and 655nm wavelength, at elevated pressures up to 5 MPa, and at temperatures up to 420 °C. Validation of the analytical technique was achieved by studying a stable particulate dispersion of Carbon Lampblack (CB) in water and 1-methylnaphthalene. The 162 nm average particle size of the dispersion was characterized ex-situ with transmission electron microscopy and a commercial laser diffraction apparatus. The average particle size obtained by this technique was 275±39 nm at room temperature and 216±23 nm at 280 °C, showing a good agreement compared with the ex-situ values. Ultimately, the goal of this work is to develop a technique capable to track on-line the size and concentration of nanoscale particles. For this purpose, sulfidation reaction of iron naphthenate was selected to study the in-situ generation of iron based nanoparticles. Particles of 202±33 nm average size were characterized by this technique, finding good agreement with ex-situ characterization of the collected reaction products. Further study of this reaction with the developed technique allowed to determine the temperature on-set for the particle generation at 274.6±0.7 °C. While simultaneous determination of particle size and concentration was not possible in this work, several modifications of the current design are presented in the end of this manuscript aiming to solve the issues encountered during this work.

Subjects/Keywords: in-situ particle characterization; laser backscattering; Diffuse wave spectroscopy; High Temperature; online particle reaction sizing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Medina, M. A. (2016). Online characterization of particle based reactions by laser backscattering. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/c3484zh14q

Chicago Manual of Style (16^th Edition):

Medina, Miguel A. “Online characterization of particle based reactions by laser backscattering.” 2016. Masters Thesis, University of Alberta. Accessed January 19, 2021. https://era.library.ualberta.ca/files/c3484zh14q.

MLA Handbook (7^th Edition):

Medina, Miguel A. “Online characterization of particle based reactions by laser backscattering.” 2016. Web. 19 Jan 2021.

Vancouver:

Medina MA. Online characterization of particle based reactions by laser backscattering. [Internet] [Masters thesis]. University of Alberta; 2016. [cited 2021 Jan 19]. Available from: https://era.library.ualberta.ca/files/c3484zh14q.

Council of Science Editors:

Medina MA. Online characterization of particle based reactions by laser backscattering. [Masters Thesis]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/c3484zh14q

University of Alberta

24. Medina Messina, Miguel A. Online characterization of particle based reactions by laser backscattering.

Degree: MS, Department of Chemical and Materials Engineering, 2016, University of Alberta

URL: https://era.library.ualberta.ca/files/cth83kz571

► A fiber optic dynamic light scattering device was successfully developed for the in-situ characterization of particle size in turbid media. Currently available techniques are only… (more)

▼ A fiber optic dynamic light scattering device was successfully developed for the in-situ characterization of particle size in turbid media. Currently available techniques are only capable of performing characterizations at room temperature and are highly limited by the turbidity of the sample. In-situ particle size characterization was accomplished using the diffuse wave spectroscopy theory and time-dependent autocorrelation analysis. Using this basis for the interpretation, information regarding the particle morphology was obtained from the backscattering signals using two simultaneous lasers, of 532 and 655nm wavelength, at elevated pressures up to 5 MPa, and at temperatures up to 420 °C. Validation of the analytical technique was achieved by studying a stable particulate dispersion of Carbon Lampblack (CB) in water and 1-methylnaphthalene. The 162 nm average particle size of the dispersion was characterized ex-situ with transmission electron microscopy and a commercial laser diffraction apparatus. The average particle size obtained by this technique was 275±39 nm at room temperature and 216±23 nm at 280 °C, showing a good agreement compared with the ex-situ values. Ultimately, the goal of this work is to develop a technique capable to track on-line the size and concentration of nanoscale particles. For this purpose, sulfidation reaction of iron naphthenate was selected to study the in-situ generation of iron based nanoparticles. Particles of 202±33 nm average size were characterized by this technique, finding good agreement with ex-situ characterization of the collected reaction products. Further study of this reaction with the developed technique allowed to determine the temperature on-set for the particle generation at 274.6±0.7 °C. While simultaneous determination of particle size and concentration was not possible in this work, several modifications of the current design are presented in the end of this manuscript aiming to solve the issues encountered during this work.

Subjects/Keywords: In-situ particle characterization; Laser backscattering; Diffuse wave spectroscopy; High Temperature; Online particle reaction sizing

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Medina Messina, M. A. (2016). Online characterization of particle based reactions by laser backscattering. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/cth83kz571

Chicago Manual of Style (16^th Edition):

Medina Messina, Miguel A. “Online characterization of particle based reactions by laser backscattering.” 2016. Masters Thesis, University of Alberta. Accessed January 19, 2021. https://era.library.ualberta.ca/files/cth83kz571.

MLA Handbook (7^th Edition):

Medina Messina, Miguel A. “Online characterization of particle based reactions by laser backscattering.” 2016. Web. 19 Jan 2021.

Vancouver:

Medina Messina MA. Online characterization of particle based reactions by laser backscattering. [Internet] [Masters thesis]. University of Alberta; 2016. [cited 2021 Jan 19]. Available from: https://era.library.ualberta.ca/files/cth83kz571.

Council of Science Editors:

Medina Messina MA. Online characterization of particle based reactions by laser backscattering. [Masters Thesis]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/cth83kz571

Penn State University

25. Heigel, Jarred Christopher. Thermo-mechanical Model Development and Experimental Validation for Directed Energy Deposition Additive Manufacturing Processes.

Degree: 2015, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/25008

► Additive manufacturing (AM) enables parts to be built through the layer-by-layer addition of molten metal. In directed energy deposition (DED) AM, metal powder or wire… (more)

▼ Additive manufacturing (AM) enables parts to be built through the layer-by-layer addition of molten metal. In directed energy deposition (DED) AM, metal powder or wire is added into a melt pool that follows a pattern to fill in the cross section of the part. When compared to traditional manufacturing processes, AM has many advantages such as the ability to make internal features and to repair high-value parts. However, the large thermal gradients generated by AM result in plastic deformation. Thermo-mechanical models must be developed to predict the temperature and distortion produced by this process. Thermo-mechanical models have been developed for AM by several investigators. These models are often validated by measuring the temperatures during the deposition of a small part and the final distortion of the part. Unfortunately this is not a sufficient validation method for the non-linear thermo-mechanical model. Although good agreement between the thermal model and the temperatures measured during a small depositions can be achieved, it does not necessarily mean that the model will be accurate for an industrially relevant part that requires 10² - 10⁴ tracks and hours of processing time. The relatively small deviations between the model and the validation will propagate when modeling large depositions and could produce inaccurate results. The errors in a large part will be increased further if the assumptions made of the thermal boundary conditions are not appropriate for the system. The objective of this work is to develop and experimentally validate thermo-mechanical models for DED. Experiments are performed to characterize the distortion induced by laser cladding. The depositions require many tracks and nearly an hour of processing time, during which the temperature and the deflection are measured in situ so that the response of the plate to each deposition track is understood. Measurements are then made of the convection caused by two different laser deposition heads. Thermo-mechanical models are developed by implementing the measured rate of convective heat transfer and the temperature dependent material properties. The models are validated using in situ measurements of the temperature and the deflection generated during the process, as well as post-process measurements of the residual stress and the distorted shape. Finally, experiments and models are used to investigate the impact of feedstock selection, either powder or wire, on the DED process. Advisors/Committee Members: Panagiotis Michaleris, Dissertation Advisor/Co-Advisor, Ashok D Belegundu, Committee Member, Eric Russell Marsh, Committee Member, Allison Michelle Beese, Committee Member, Todd Palmer, Committee Member, Edward William Reutzel, Special Member.

Subjects/Keywords: Additive manufacturing; laser cladding; distortion; convection; finite element analysis; residual stress; in situ measurement

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Heigel, J. C. (2015). Thermo-mechanical Model Development and Experimental Validation for Directed Energy Deposition Additive Manufacturing Processes. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/25008

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Heigel, Jarred Christopher. “Thermo-mechanical Model Development and Experimental Validation for Directed Energy Deposition Additive Manufacturing Processes.” 2015. Thesis, Penn State University. Accessed January 19, 2021. https://submit-etda.libraries.psu.edu/catalog/25008.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Heigel, Jarred Christopher. “Thermo-mechanical Model Development and Experimental Validation for Directed Energy Deposition Additive Manufacturing Processes.” 2015. Web. 19 Jan 2021.

Vancouver:

Heigel JC. Thermo-mechanical Model Development and Experimental Validation for Directed Energy Deposition Additive Manufacturing Processes. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Jan 19]. Available from: https://submit-etda.libraries.psu.edu/catalog/25008.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Heigel JC. Thermo-mechanical Model Development and Experimental Validation for Directed Energy Deposition Additive Manufacturing Processes. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/25008

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Wollongong

26. Niknafs, Salar. Study of micro-structural formations during solidification of steel.

Degree: PhD, 2013, University of Wollongong

URL: ; https://ro.uow.edu.au/theses/3797

► Solidification microstructure is a defining link between production techniques and the resulting mechanical properties of cast metals and in particular steel. The microstructural scales… (more)

▼ Solidification microstructure is a defining link between production techniques and the resulting mechanical properties of cast metals and in particular steel. The microstructural scales of these structures control the segregation profiles of solute elements in the interdendritic regions, thus determining the mechanical properties of the cast structure. Hence, understanding the various aspects of solidification is essential in the quest for the fabrication of better products. The microstructure achieved during solidification of alloys is a result of morphological evolution of the solid/liquid interface. In the past, it was shown that some of the contributing factors which influence the solid/liquid interface morphology are: temperature gradient, solidification rate and alloy composition. Real-time solidification studies in iron-based alloys are particularly difficult due to their occurrence at high temperatures. Consequently, real-time observations of solid/liquid interface morphologies are mostly limited to the study of transparent organic materials or alloys with relatively low melting points, using Bridgman-type furnaces and directional solidification techniques. In Chapter 2, a Laser Scanning Confocal Microscopy (LSCM) was used to experimentally study the microstructural formations during solidification of steel. The major objective of this chapter was to investigate the feasibility of the LSCM and the concentric solidification technique as an alternative to the traditional directional solidification methods in Bridgman-type furnaces. Experimental observations were carried out on a low-carbon, low-alloyed steel. The effect of varying amounts of copper additions on the interface instability was studied and subsequently discussed. The LSCM provided the possibility of real-time observations at temperatures as high as 1600◦C. The conventional LSCM’s furnace was equipped with a controller that cooled the specimens at controlled rates of up to 100◦C/min. Cooling rates of up to 2500◦C/min were also achieved by momentarily turning off the furnace power for short periods of time. By doing so, the microscope chamber cooled at rates which were measured subsequently by acquiring data from the thermocouples. In contrast to the Bridgman apparatus, where controlled temperature gradients can be induced, the temperature gradient cannot be externally controlled in the LSCM apparatus. The technique used in this study therefore reproduced a non-steady-state growth condition. In-situ observations provided the opportunity to study the planar to cellular interface transitions in steel and revealed some unique phenomena associated with this transition. In Chapter 3, MICRESS multi phase-field method was used to simulate the pattern formation during solidification of the low-carbon low-alloyed base steel. The model was linked with in-situ measurements of solid/liquid interfacial energy in the LSCM, to obtain a more reliable prediction of interface stability during solidification. Once a “Standard model”…

Subjects/Keywords: steel solidification; phase-field modelling; laser scanning confocal microscopy; in-situ; cellular dendritic

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Niknafs, S. (2013). Study of micro-structural formations during solidification of steel. (Doctoral Dissertation). University of Wollongong. Retrieved from ; https://ro.uow.edu.au/theses/3797

Chicago Manual of Style (16^th Edition):

Niknafs, Salar. “Study of micro-structural formations during solidification of steel.” 2013. Doctoral Dissertation, University of Wollongong. Accessed January 19, 2021. ; https://ro.uow.edu.au/theses/3797.

MLA Handbook (7^th Edition):

Niknafs, Salar. “Study of micro-structural formations during solidification of steel.” 2013. Web. 19 Jan 2021.

Vancouver:

Niknafs S. Study of micro-structural formations during solidification of steel. [Internet] [Doctoral dissertation]. University of Wollongong; 2013. [cited 2021 Jan 19]. Available from: ; https://ro.uow.edu.au/theses/3797.

Council of Science Editors:

Niknafs S. Study of micro-structural formations during solidification of steel. [Doctoral Dissertation]. University of Wollongong; 2013. Available from: ; https://ro.uow.edu.au/theses/3797

Delft University of Technology

27. Choudhary, Abhas (author). Thermal deconsolidation of thermoplastic prepreg tapes during Laser-Assisted Fiber Placement.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d363b989-f29a-467f-a0dd-dc5e62680546

► The automation of thermoplastic composite production and the drive towards out-of-autoclave processes, is of great relevance in the aerospace and lightweight composite structures industry. Hence,… (more)

▼ The automation of thermoplastic composite production and the drive towards out-of-autoclave processes, is of great relevance in the aerospace and lightweight composite structures industry. Hence, there is a crucial need for developing the current state of material and process understanding, in order to increase the technology readiness levels of automated, out-of-autoclave production processes. Laser assisted fiber placement (LAFP) is a well-researched, automated production process which has been used in developing various thermoplastic composite demonstrators. Theoretically, this process does not require an autoclave consolidation cycle. However, one of the remaining challenge in the process, is the relatively high void content in the produced laminates (>1%). This high void content is impeding the development of thermoplastic composite structures with mechanical strength comparable to structures produced through traditional processing techniques, such as an autoclave. One of the main reasons for the remaining void content in the laminates after consolidation by the roller, is thermal deconsolidation during the rapid heating phase of the process. This is a very less researched aspect of LAFP, due to which, not much is known about the changes that the incoming material undergoes, due to the rapid laser heating and which mechanisms govern these changes. Due to this, thermal deconsolidation is also not included in predictive models for the process and hence the accuracy of these models in predicting the final part quality is poor. Therefore, this research focuses on gaining a better understanding of thermal deconsolidation, in the context of rapid laser heating during LAFP, through experimental investigation.The influence of five process variables was studied in this work: heating time, heated spot length, cooling rate, nip point temperature and the polymer type in carbon-fiber reinforced thermoplastic pre-impregnated (prepreg) tapes. The deconsolidated state of prepreg tape specimens was captured after rapid laser heating and the changes were characterized. The main results revealed that thermal deconsolidation due to rapid laser heating is governed by multiple mechanisms. Some previously unreported and non-intuitive results were observed in the material response to rapid laser heating, which are suspected to have a strong influence on the quality of the laminates produced through LAFP. Based on a qualitative and quantitative study of the influence of studied process variables on thermal deconsolidation, some mechanisms were identified and later verified with confirmatory experiments. The results of this study can be used as a starting point to develop predictive models for estimating the deconsolidated state of thermoplastic prepreg tapes, at the end of the rapid heating phase, in future work. Various topics for further research prevail. These include but are not limited to: studying the influence of tool temperature on the deconsolidation response of the prepreg material, evaluation of the deconsolidated state… Advisors/Committee Members: Teuwen, Julie (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Thermoplastic; Prepreg; Deconsolidation; Laser Assisted Fiber Placement (LAFP); In-situ consolidation; Out-of-autoclave

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Choudhary, A. (. (2019). Thermal deconsolidation of thermoplastic prepreg tapes during Laser-Assisted Fiber Placement. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d363b989-f29a-467f-a0dd-dc5e62680546

Chicago Manual of Style (16^th Edition):

Choudhary, Abhas (author). “Thermal deconsolidation of thermoplastic prepreg tapes during Laser-Assisted Fiber Placement.” 2019. Masters Thesis, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:d363b989-f29a-467f-a0dd-dc5e62680546.

MLA Handbook (7^th Edition):

Choudhary, Abhas (author). “Thermal deconsolidation of thermoplastic prepreg tapes during Laser-Assisted Fiber Placement.” 2019. Web. 19 Jan 2021.

Vancouver:

Choudhary A(. Thermal deconsolidation of thermoplastic prepreg tapes during Laser-Assisted Fiber Placement. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:d363b989-f29a-467f-a0dd-dc5e62680546.

Council of Science Editors:

Choudhary A(. Thermal deconsolidation of thermoplastic prepreg tapes during Laser-Assisted Fiber Placement. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:d363b989-f29a-467f-a0dd-dc5e62680546

University of Arizona

28. Castillo, Susana Jazmin. Characterization of Recycled Metal Powder for Assessing Its Reusability in Additive Manufacturing of Engineering Parts and Components .

Degree: 2019, University of Arizona

URL: http://hdl.handle.net/10150/634223

► Additive manufacturing technologies such as Laser Powder Bed Fusion provide unprecedented abilities to manufacture complex 3-D parts and structures; however, the process produces unused metal… (more)

Subjects/Keywords: Additive Manufacturing; Characterization; Coherence Scanning Interferometry; In situ; Laser Powder Bed Fusion; Recyclability

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APA (6^th Edition):

Castillo, S. J. (2019). Characterization of Recycled Metal Powder for Assessing Its Reusability in Additive Manufacturing of Engineering Parts and Components . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/634223

Chicago Manual of Style (16^th Edition):

Castillo, Susana Jazmin. “Characterization of Recycled Metal Powder for Assessing Its Reusability in Additive Manufacturing of Engineering Parts and Components .” 2019. Masters Thesis, University of Arizona. Accessed January 19, 2021. http://hdl.handle.net/10150/634223.

MLA Handbook (7^th Edition):

Castillo, Susana Jazmin. “Characterization of Recycled Metal Powder for Assessing Its Reusability in Additive Manufacturing of Engineering Parts and Components .” 2019. Web. 19 Jan 2021.

Vancouver:

Castillo SJ. Characterization of Recycled Metal Powder for Assessing Its Reusability in Additive Manufacturing of Engineering Parts and Components . [Internet] [Masters thesis]. University of Arizona; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10150/634223.

Council of Science Editors:

Castillo SJ. Characterization of Recycled Metal Powder for Assessing Its Reusability in Additive Manufacturing of Engineering Parts and Components . [Masters Thesis]. University of Arizona; 2019. Available from: http://hdl.handle.net/10150/634223

University of South Carolina

29. Gordon, Christopher Michael. In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions.

Degree: MS, Chemistry and Biochemistry, 2011, University of South Carolina

URL: https://scholarcommons.sc.edu/etd/686

► This thesis describes two methods investigated for their uses as tools for in-situ spectroscopy. As knowledge in the Chemical Sciences as well as technology… (more)

Subjects/Keywords: Chemistry; Physical Sciences and Mathematics; In-Situ; Laser; Plasma; Remote; Sensor; Spectroscopy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gordon, C. M. (2011). In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions. (Masters Thesis). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/686

Chicago Manual of Style (16^th Edition):

Gordon, Christopher Michael. “In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions.” 2011. Masters Thesis, University of South Carolina. Accessed January 19, 2021. https://scholarcommons.sc.edu/etd/686.

MLA Handbook (7^th Edition):

Gordon, Christopher Michael. “In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions.” 2011. Web. 19 Jan 2021.

Vancouver:

Gordon CM. In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions. [Internet] [Masters thesis]. University of South Carolina; 2011. [cited 2021 Jan 19]. Available from: https://scholarcommons.sc.edu/etd/686.

Council of Science Editors:

Gordon CM. In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions. [Masters Thesis]. University of South Carolina; 2011. Available from: https://scholarcommons.sc.edu/etd/686

Université de Sherbrooke

30. Liu, Neng. Sur l’origine de l’interdiffusion de puits quantiques par laser uv dans des heterostructures de semi-conducteurs iii-v: On the origin of uv laser-induced quantum well intermixing in iii-v semiconductor heterostructures.

Degree: 2014, Université de Sherbrooke

URL: http://savoirs.usherbrooke.ca/handle/11143/5291

► Résumé : Les circuits photoniques intégrés qui combinent des dispositifs photoniques pour la génération, la détection, la modulation, l'amplification, la commutation et le transport de… (more)

▼ Résumé : Les circuits photoniques intégrés qui combinent des dispositifs photoniques pour la génération, la détection, la modulation, l'amplification, la commutation et le transport de la lumière dans une puce, ont été rapportés comme étant une innovation technologique importante qui simplifie la conception du système optique et qui réduit l'espace et la consommation de l'énergie en améliorant ainsi la fiabilité. La capacité de modifier la bande interdite des zones sélectives des différents dispositifs photoniques à travers la puce est la clé majeure pour le développement de circuits photoniques intégrés. Comparé à d'autres méthodes d’épitaxie, l’interdiffusion de puits quantiques a attiré beaucoup d'intérêt en raison de sa simplicité et son efficacité en accordant la bande interdite durant le processus de post-épitaxie. Cependant, l’interdiffusion de puits quantiques a subi des problèmes reliés au manque de précision pour modifier convenablement la bande interdite ciblée et à l’incontrôlabilité de l’absorption des impuretés au cours du processus qui peut dégrader la qualité du matériel interdiffusé. Dans cette thèse, nous avons utilisé les lasers excimer pour créer des défauts à proximité de la surface (~ 10 nm) des microstructures à base de puits quantiques III-V (par exemple InP et GaAs) et pour induire l’interdiffusion après le recuit thermique. L'irradiation par les lasers excimer (ArF et KrF) des microstructures à puits quantiques a été réalisée dans différents environnements, y compris l'air, l'eau déionisée, les couches diélectriques (SiO2 et Si3N4) et les couches d’InOx. Pour proposer un bon contrôle de la technique d’interdiffusion de puits quantiques par laser excimer, nous avons étudié la génération et la diffusion de défauts de surface en utilisant différentes méthodes de caractérisation de surface/interface, comme l'AFM, SEM, XPS et SIMS qui ont été utilisées pour analyser la modification de la morphologie de surface/interface et la modification chimique de la microstructure de ces puits quantiques. La qualité des microstructures à puits quantiques étudiées a été représentée par des mesures de photoluminescence et de luminescence des diodes lasers ainsi fabriqués. Les résultats montrent que le laser excimer induit des quantités d'oxydes de surface dans les surfaces des microstructure à puits quantiques InP/InGaAs/InGaAsP dans l'air et des impuretés d'oxygène des couches d'oxydes diffusées dans la région active de la microstructure lors du recuit, ce qui améliore l’interdiffusion, mais réduit l'intensité de la photoluminescence. Par contre, l’irradiation dans un environnement d'eau déionisée n’a pas démontré de diffusion des impuretés évidentes d'un excès d'oxygène vers les régions actives, mais la stœchiométrie de surface a été restaurée après l’interdiffusion. L’InOx a été trouvé avec un grand coefficient de dilatation thermique dans la microstructure interdiffusée qui était supposée d’augmenter la contrainte de compression dans la région active et ainsi d’augmenter l'intensité de… Advisors/Committee Members: Dubowski, Jan J. (advisor).

Subjects/Keywords: Interdiffusion de puits quantiques; Laser excimer; Microstructure InP/InGaAs/InGaAsP; XPS; SIMS; Quantum well intermixing; Excimer laser; InP/InGaAs/InGaAsP microstructure

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APA (6^th Edition):

Liu, N. (2014). Sur l’origine de l’interdiffusion de puits quantiques par laser uv dans des heterostructures de semi-conducteurs iii-v: On the origin of uv laser-induced quantum well intermixing in iii-v semiconductor heterostructures. (Doctoral Dissertation). Université de Sherbrooke. Retrieved from http://savoirs.usherbrooke.ca/handle/11143/5291

Chicago Manual of Style (16^th Edition):

Liu, Neng. “Sur l’origine de l’interdiffusion de puits quantiques par laser uv dans des heterostructures de semi-conducteurs iii-v: On the origin of uv laser-induced quantum well intermixing in iii-v semiconductor heterostructures.” 2014. Doctoral Dissertation, Université de Sherbrooke. Accessed January 19, 2021. http://savoirs.usherbrooke.ca/handle/11143/5291.

MLA Handbook (7^th Edition):

Liu, Neng. “Sur l’origine de l’interdiffusion de puits quantiques par laser uv dans des heterostructures de semi-conducteurs iii-v: On the origin of uv laser-induced quantum well intermixing in iii-v semiconductor heterostructures.” 2014. Web. 19 Jan 2021.

Vancouver:

Liu N. Sur l’origine de l’interdiffusion de puits quantiques par laser uv dans des heterostructures de semi-conducteurs iii-v: On the origin of uv laser-induced quantum well intermixing in iii-v semiconductor heterostructures. [Internet] [Doctoral dissertation]. Université de Sherbrooke; 2014. [cited 2021 Jan 19]. Available from: http://savoirs.usherbrooke.ca/handle/11143/5291.

Council of Science Editors:

Liu N. Sur l’origine de l’interdiffusion de puits quantiques par laser uv dans des heterostructures de semi-conducteurs iii-v: On the origin of uv laser-induced quantum well intermixing in iii-v semiconductor heterostructures. [Doctoral Dissertation]. Université de Sherbrooke; 2014. Available from: http://savoirs.usherbrooke.ca/handle/11143/5291

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