subject:(ATR FTIR)

1. Benetti, Carolina. Estudo in-vitro dos efeitos do laser de Er,Cr:YSGG em tecido ósseo por espectroscopia ATR-FTIR.

Degree: Mestrado, Tecnologia Nuclear - Materiais, 2010, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-02082011-092521/ ;

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O laser tem se mostrado eficaz no auxílio ao profissional de saúde, sendo extensivamente utilizado em procedimentos médicos e odontológicos nas ultimas décadas. Em particular,… (more)

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O laser tem se mostrado eficaz no auxílio ao profissional de saúde, sendo extensivamente utilizado em procedimentos médicos e odontológicos nas ultimas décadas. Em particular, os lasers de alta intensidade emissores no infravermelho possuem grande potencial para corte de tecidos biológicos mineralizados, visto que são bastante absorvidos pela hidroxiapatita e água, principais componentes desses tecidos. Em comparação aos instrumentos mecânicos, o laser apresenta uma série de vantagens no corte de tecidos, com possibilidade de menor dano ao tecido remanescente e melhor hemostasia. Entretanto, para uma aplicação eficiente e segura é necessário conhecer os efeitos que a irradiação laser causa ao tecido. A técnica de espectroscopia no Infravermelho por Transformada de Fourier (FTIR) é bastante utilizada no estudo de materiais orgânicos, pois além de permitir a identificação de componentes, possibilita uma análise semiquantitativa. Este trabalho tem como objetivos estabelecer a técnica de ATR-FTIR para caracterização do tecido ósseo natural e irradiado, e verificar as eventuais mudanças químicas e estruturais causadas pela irradiação laser. Primeiramente, foram determinadas as melhores condições instrumentais para a obtenção dos espectros de amostras de osso. Posteriormente foram analisadas as amostras de osso natural e irradiado com o laser de Er,Cr:YSGG (2,78 μm) com diferentes densidades de energia. Verificou-se que a técnica foi eficaz na caracterização do tecido ósseo, sendo possível observar as alterações químicas promovidas pelo aumento de temperatura ocasionado pela irradiação laser. Foi observada a perda gradativa de material orgânico em função do aumento da densidade de energia utilizada. Os resultados obidos são os primeiros passos para a verificação da eficácia do laser de Er,Cr:YSGG quando empregado como uma ferramenta de corte, essencial para sua consolidação na prática clínica.

Laser proves to be, more and more, an effective tool for helping health professionals, being intensively used in ophthalmological and odontological procedures. In particular, high-density, infrared emitting lasers have great potential in cutting mineralized biological hard tissues, given their high absorption by hydroxyapatite and water, these tissues main components. In comparison to mechanical instruments, laser presents a series of advantages, namely, smaller damage to the remaining tissue and promotion of homeostatic effect, apart from making it possible to execute procedures in areas with difficult access. However, for an efficient and safe use of this technique, it is necessary to know the effects of the laser irradiation on the tissue. The Fourier transform infrared (FTIR) technique is heavily used in the study of organic materials, because apart from making it possible to identify the materials components, it also allows to prepare a semi quantitative analysis. This work aims to establish the ATR-FTIR technique in the characterization of natural and irradiated osseous tissue, and to verify the possible chemical and…

Advisors/Committee Members: Zezell, Denise Maria.

Subjects/Keywords: ATR-FTIR spectroscopy; bone; espectroscopia ATR-FTIR; laser; laser; osso

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

APA (6^th Edition):

Benetti, C. (2010). Estudo in-vitro dos efeitos do laser de Er,Cr:YSGG em tecido ósseo por espectroscopia ATR-FTIR. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/85/85134/tde-02082011-092521/ ;

Chicago Manual of Style (16^th Edition):

Benetti, Carolina. “Estudo in-vitro dos efeitos do laser de Er,Cr:YSGG em tecido ósseo por espectroscopia ATR-FTIR.” 2010. Masters Thesis, University of São Paulo. Accessed June 19, 2019. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-02082011-092521/ ;.

MLA Handbook (7^th Edition):

Benetti, Carolina. “Estudo in-vitro dos efeitos do laser de Er,Cr:YSGG em tecido ósseo por espectroscopia ATR-FTIR.” 2010. Web. 19 Jun 2019.

Vancouver:

Benetti C. Estudo in-vitro dos efeitos do laser de Er,Cr:YSGG em tecido ósseo por espectroscopia ATR-FTIR. [Internet] [Masters thesis]. University of São Paulo; 2010. [cited 2019 Jun 19]. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-02082011-092521/ ;.

Council of Science Editors:

Benetti C. Estudo in-vitro dos efeitos do laser de Er,Cr:YSGG em tecido ósseo por espectroscopia ATR-FTIR. [Masters Thesis]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-02082011-092521/ ;

Universidade de Brasília

2. Alex Rodrigues Brito de Medeiros. Uso de ATR/FTIR e FTNIR associado a técnicas quimiométricas para quantificação de aditivos em gasolina automotiva.

Degree: 2009, Universidade de Brasília

URL: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5916

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Formation of deposits is a very common problem in vehicles due to the formation of gum and sludge by burning fuel inside the engine. Additives… (more)

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Formation of deposits is a very common problem in vehicles due to the formation of gum and sludge by burning fuel inside the engine. Additives detergent / dispersants are designed to reduce the influence of these agents in the proper functioning of automotive vehicles. These components are polymeric amine matrix added in the fuel distributor at the concentration indicated and are marketed separately from gasoline by the addition of dye. In this work, we propose a methodology applying vibrational spectroscopy (FTIR and FTNIR) combined with chemometric techniques and preconcentration of fuels (unwashed gum and atmospheric distillation) to quantify three additives in gasoline. Curves were built using multivariate calibration (PLS1). The results were analyzed by using F test, detection capability and relative prediction error (REP). The results show that concentrations below than 200 mg/kg can be monitored in gasoline. In general, the results show that the FTIR data are more consistent than those of FTNIR. Also, results show that using unwashed gum for preconcentration yields better performance than atmospheric distillation residue.

A formação de depósitos é um problema muito comum em veículos automotivos devido à formação de goma e borra durante a queima do combustível no interior do motor. Aditivos detergentes/dispersantes foram criados para diminuir a influência desses agentes no funcionamento adequado dos veículos automotivos. Esses componentes, geralmente aminas poliméricas, são adicionados ao combustível ainda na distribuidora de combustíveis na concentração indicada e são comercializados distintamente da gasolina comum pela adição de corante. Neste trabalho, é proposta uma metodologia que se utiliza de espectroscopia vibracional (FTIR e FTNIR) associada a técnicas quimiométricas e pré-concentração dos combustíveis (resíduo de goma e resíduo de destilação) para quantificar três aditivos em gasolina C comum. Foram construídas curvas de calibração multivariada (PLS1). Os resultados foram analisados por comparação através do Teste F dos RMSEP (Root Means Square Error of Prediction), cálculo de capacidade de detecção e erro relativo de previsão (REP). Os resultados mostram que limites inferiores a 200 mg/kg de aditivos podem ser monitorados em gasolina automotiva utilizando espectroscopia vibracional. Em geral, os resultados mostram que os dados de FTIR são mais consistentes que àqueles de FTNIR. Além disso, os resultados mostram que o método de pré-concentração que se utiliza de resíduo de goma não lavada, em geral, possui melhor desempenho que o de resíduo de destilação.

Advisors/Committee Members: Jurandir Rodrigues de Souza, Jez Willian Batista Braga, Rossine Amorim Messias, Joel Camargo Rubim.

Subjects/Keywords: QUIMICA; quimiometria; ATR/FTIR; gasolina; FTNIR; aditivos

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

APA (6^th Edition):

Medeiros, A. R. B. d. (2009). Uso de ATR/FTIR e FTNIR associado a técnicas quimiométricas para quantificação de aditivos em gasolina automotiva. (Thesis). Universidade de Brasília. Retrieved from http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5916

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):

Medeiros, Alex Rodrigues Brito de. “Uso de ATR/FTIR e FTNIR associado a técnicas quimiométricas para quantificação de aditivos em gasolina automotiva.” 2009. Thesis, Universidade de Brasília. Accessed June 19, 2019. http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5916.

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

MLA Handbook (7^th Edition):

Medeiros, Alex Rodrigues Brito de. “Uso de ATR/FTIR e FTNIR associado a técnicas quimiométricas para quantificação de aditivos em gasolina automotiva.” 2009. Web. 19 Jun 2019.

Vancouver:

Medeiros ARBd. Uso de ATR/FTIR e FTNIR associado a técnicas quimiométricas para quantificação de aditivos em gasolina automotiva. [Internet] [Thesis]. Universidade de Brasília; 2009. [cited 2019 Jun 19]. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5916.

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

Council of Science Editors:

Medeiros ARBd. Uso de ATR/FTIR e FTNIR associado a técnicas quimiométricas para quantificação de aditivos em gasolina automotiva. [Thesis]. Universidade de Brasília; 2009. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5916

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

Universidade Federal de Santa Maria

3. Aline Lima Hermes Müller. DETERMINAÇÃO SIMULTÂNEA DE ÁCIDO CLAVULÂNICO E AMOXICILINA EM FORMULAÇÕES FARMACÊUTICAS UTILIZANDO TÉCNICAS DE REFLEXÃO NO INFRAVERMELHO MÉDIO E MÉTODOS DE REGRESSÃO MULTIVARIADOS.

Degree: 2009, Universidade Federal de Santa Maria

URL: http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2827

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Os fármacos ácido clavulânico (AC) e amoxicilina (AMO) são utilizados em associação e são comercializados no Brasil como agentes antibióticos. A determinação simultânea destes fármacos… (more)

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Os fármacos ácido clavulânico (AC) e amoxicilina (AMO) são utilizados em associação e são comercializados no Brasil como agentes antibióticos. A determinação simultânea destes fármacos é, normalmente, realizada por cromatografia a líquido de alta eficiência (HPLC, do inglês high performance liquid chromatography). O presente estudo teve por objetivo a determinação simultânea de AC e AMO utilizando técnicas de espectroscopia de reflexão no infravermelho médio (FTIR/ATR e DRIFTS) combinadas com métodos de análise multivariada. Utilizaramse 19 amostras comerciais e 17 amostras sintéticas (28 amostras para o conjunto de calibração e 8 amostras para o conjunto previsão). Obtiveram-se modelos de calibração por mínimos quadrados parciais (PLS) e seleção de variáveis através dos algoritmos por mínimos quadrados parciais por intervalo (iPLS), por sinergismo (siPLS) e por exclusão (biPLS). Os melhores modelos foram obtidos através da utilização do pré-processamento centrado na média e do tratamento de correção do espalhamento de luz (MSC). Utilizando os dados obtidos por FTIR/ATR o modelo que apresentou melhor capacidade preditiva foi aquele que utilizou o algoritmo biPLS, fornecendo um erro padrão de predição relativo (RSEP) de 3,58% (raiz quadrada do erro médio de previsão - RMSEP = 6,17 mg g-1) para AC e RSEP de 5,12% (RMSEP = 33,58 mg g-1) para AMO. Quando utilizados os dados obtidos por DRIFTS, os melhores modelos foram os que utilizaram o algoritmo siPLS, produzindo RSEP de 4,98% (RMSEP = 8,44 mg g-1) para AC e RSEP de 4,75% (RMSEP = 23,31 mg g-1) para AMO. Os resultados de ambas as metodologias propostas foram comparados com os valores obtidos pela metodologia de referência por HPLC, não se verificando diferença significativa entre seus valores. Desta forma, os resultados mostraram que as técnicas de FTIR/ATR e DRIFTS associadas aos métodos de regressão multivariados permitiram a obtenção de modelos apropriados para a determinação simultânea de AC e AMO em formulações farmacêuticas.

Clavulanic acid (AC) and amoxicillin (AMO) drugs are used in association and they are commercialized in Brazil as antibiotic agent. The simultaneous determination of these drugs is, usually, carried out by high performance liquid chromatography (HPLC). In the present study a methodology for simultaneous determination of AC and AMO was developed using Fourier transform mid infrared technique coupled with attenuated total reflectance (FTIR/ATR) and diffuse reflectance (DRIFTS). Nineteen commercial samples and 17 synthetic samples (28 samples for calibration set and 8 samples for prevision set) were used. Calibration models were developed using partial least squares (PLS) and interval partial least squares (iPLS), synergy partial least squares (siPLS) and backward interval partial least squares (biPLS) were used as variable selection methods. Multiplicative scatter correction (MSC) and the data centered in the media produced the best models. A relative standard error of prediction (RSEP) of 3.58% (root mean square error of prediction RMSEP =…

Advisors/Committee Members: Érico Marlon de Moraes Flores, Marco Flôres Ferrão, Ronei Jesus Poppi.

Subjects/Keywords: Chemometrics; DRIFTS; associações medicamentosas; QUIMICA; FTIR/ATR

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

APA (6^th Edition):

Müller, A. L. H. (2009). DETERMINAÇÃO SIMULTÂNEA DE ÁCIDO CLAVULÂNICO E AMOXICILINA EM FORMULAÇÕES FARMACÊUTICAS UTILIZANDO TÉCNICAS DE REFLEXÃO NO INFRAVERMELHO MÉDIO E MÉTODOS DE REGRESSÃO MULTIVARIADOS. (Thesis). Universidade Federal de Santa Maria. Retrieved from http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2827

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):

Müller, Aline Lima Hermes. “DETERMINAÇÃO SIMULTÂNEA DE ÁCIDO CLAVULÂNICO E AMOXICILINA EM FORMULAÇÕES FARMACÊUTICAS UTILIZANDO TÉCNICAS DE REFLEXÃO NO INFRAVERMELHO MÉDIO E MÉTODOS DE REGRESSÃO MULTIVARIADOS.” 2009. Thesis, Universidade Federal de Santa Maria. Accessed June 19, 2019. http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2827.

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

MLA Handbook (7^th Edition):

Müller, Aline Lima Hermes. “DETERMINAÇÃO SIMULTÂNEA DE ÁCIDO CLAVULÂNICO E AMOXICILINA EM FORMULAÇÕES FARMACÊUTICAS UTILIZANDO TÉCNICAS DE REFLEXÃO NO INFRAVERMELHO MÉDIO E MÉTODOS DE REGRESSÃO MULTIVARIADOS.” 2009. Web. 19 Jun 2019.

Vancouver:

Müller ALH. DETERMINAÇÃO SIMULTÂNEA DE ÁCIDO CLAVULÂNICO E AMOXICILINA EM FORMULAÇÕES FARMACÊUTICAS UTILIZANDO TÉCNICAS DE REFLEXÃO NO INFRAVERMELHO MÉDIO E MÉTODOS DE REGRESSÃO MULTIVARIADOS. [Internet] [Thesis]. Universidade Federal de Santa Maria; 2009. [cited 2019 Jun 19]. Available from: http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2827.

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

Council of Science Editors:

Müller ALH. DETERMINAÇÃO SIMULTÂNEA DE ÁCIDO CLAVULÂNICO E AMOXICILINA EM FORMULAÇÕES FARMACÊUTICAS UTILIZANDO TÉCNICAS DE REFLEXÃO NO INFRAVERMELHO MÉDIO E MÉTODOS DE REGRESSÃO MULTIVARIADOS. [Thesis]. Universidade Federal de Santa Maria; 2009. Available from: http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=2827

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

Delft University of Technology

4. Tromp, S.A. ATR-FTIR in catalysis: Study of homogeneous, heterogeneous and biocatalysts.

Degree: 2011, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2

This work discusses the use of ATR-FTIR in catalysis. Besides development and critical analysis of the method, several catalytic systems have been studied. Advisors/Committee Members: Moulijn, J.A., Kreutzer, M.T., Mul, G..

Subjects/Keywords: ATR; FTIR; catalysis

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

APA (6^th Edition):

Tromp, S. A. (2011). ATR-FTIR in catalysis: Study of homogeneous, heterogeneous and biocatalysts. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2

Chicago Manual of Style (16^th Edition):

Tromp, S A. “ATR-FTIR in catalysis: Study of homogeneous, heterogeneous and biocatalysts.” 2011. Doctoral Dissertation, Delft University of Technology. Accessed June 19, 2019. http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2.

MLA Handbook (7^th Edition):

Tromp, S A. “ATR-FTIR in catalysis: Study of homogeneous, heterogeneous and biocatalysts.” 2011. Web. 19 Jun 2019.

Vancouver:

Tromp SA. ATR-FTIR in catalysis: Study of homogeneous, heterogeneous and biocatalysts. [Internet] [Doctoral dissertation]. Delft University of Technology; 2011. [cited 2019 Jun 19]. Available from: http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2.

Council of Science Editors:

Tromp SA. ATR-FTIR in catalysis: Study of homogeneous, heterogeneous and biocatalysts. [Doctoral Dissertation]. Delft University of Technology; 2011. Available from: http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; urn:NBN:nl:ui:24-uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2 ; http://resolver.tudelft.nl/uuid:d0c7a7fe-1be8-4cba-b1e7-3e411779b3e2

5. Viana, Rommel Bezerra. Espectroscopia de infravermelho de cristalitos de surfactantes.

Degree: Mestrado, Química Analítica, 2008, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/75/75132/tde-23062008-094327/ ;

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O objetivo deste trabalho é estudar o nível de organização dos cristalitos de surfactantes aniônico, catiônico e zwiteriônico com o aumento na densidade destas moléculas… (more)

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O objetivo deste trabalho é estudar o nível de organização dos cristalitos de surfactantes aniônico, catiônico e zwiteriônico com o aumento na densidade destas moléculas sobre um cristal de germânio. As análises foram realizadas por espectroscopia de infravermelho com transformada de Fourier acoplada à técnica de reflexão total atenuada (FTIR-ATR). Este estudo apresenta importantes aspectos na organização do dodecilsulfato de sódio (SDS), do N-hexadecil-N,N-dimetil-3-amônio-1-propanosulfato (HPS), do brometo de hexadeciltrimetilamônio (CTAB) e do brometo de dodeciltrimetilamônio (DTAB). No SDS é observado um deslocamento de 1.7 cm-1 para valores de maior frequência na banda de estiramento assimétrico do CH2, vass (CH2), enquanto que é observado um deslocamento de 0.9 cm-1 na banda de estiramento simétrico, vsim (CH2). Este deslocamento para valores de maior frequência nas bandas de estiramento está associado com um aumento na desorganização da cadeia alifática com o aumento na densidade de moléculas sobre o elemento de ATR. A banda de deformação angular do CH2, δ(CH2), apresenta um valor em 1468 cm-1 que é também um indicativo de desorganização. No CTAB não é observado variações acentuadas nos valores das frequências vibracionais. Na banda vass (CH2) do DTAB é observado um deslocamento de 4.5 cm-1 para valores de menor frequência. Embora seja observado valores próximos de 2920 cm-1 para a banda vass (CH2), que é um indicativo do estado líquido de surfactantes, o que é observado nesse estudo são cristalitos de DTAB. O deslocamento da banda vsim (CH2) do DTAB é da ordem de 2 cm-1. Estas mudanças nas bandas vass (CH2) e vsim (CH2) são um indicativo da diminuição nas conformações gauche e um aumento nas conformações trans ao longo da cadeia alifática. O valor da freqüência em torno de 1472 cm-1 para a banda δ(CH2) é também um indicativo de uma maior organização na cadeia de CH2 do DTAB. Para o HPS é observado um deslocamento de 2.6 e 2.7 cm-1 para valores de maior frequência nas bandas vass (CH2) e vsim (CH2), respectivamente. A banda δ(CH2) do HPS apresenta um deslocamento de 4 cm-1 para valores de maior frequência. A variação nas bandas vass (CH2), vsim (CH2), e δ(CH2) ressalta o aumento na desorganização da cadeia alifática com o aumento na densidade de moléculas de HPS sobre o germânio.

The objective of this work is study the order level of anionic, cationic and zwitterionic surfactants with the increase of their density packing on the surface of a germanium element. The analyses were performed by a Fourier transform infrared-attenuated total reflection spectroscopy. This study shows important insights on the conformational order of sodium dodecyl sulfate (SDS), N-hexadecyl-N-N -dimethyl-3-ammonio-1-propane-sulfonate (HPS), hexadecyl-trimethylammonium bromide (CTAB) and dodecyl trimethylammonium bromide (DTAB). It is observed a shift of 1.7 and 0.9 cm-1 to higher frequency values of the CH2 asymmetric (vass (CH2)) and symmetric (vsim(CH2)) stretching bands for the SDS molecules,…

Advisors/Committee Members: Pimentel, André Silva.

Subjects/Keywords: ATR-FTIR; CTAB; CTAB; DTAB; DTAB; FTIR-ATR; HPS; HPS; SDS; SDS

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

APA (6^th Edition):

Viana, R. B. (2008). Espectroscopia de infravermelho de cristalitos de surfactantes. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/75/75132/tde-23062008-094327/ ;

Chicago Manual of Style (16^th Edition):

Viana, Rommel Bezerra. “Espectroscopia de infravermelho de cristalitos de surfactantes.” 2008. Masters Thesis, University of São Paulo. Accessed June 19, 2019. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-23062008-094327/ ;.

MLA Handbook (7^th Edition):

Viana, Rommel Bezerra. “Espectroscopia de infravermelho de cristalitos de surfactantes.” 2008. Web. 19 Jun 2019.

Vancouver:

Viana RB. Espectroscopia de infravermelho de cristalitos de surfactantes. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2019 Jun 19]. Available from: http://www.teses.usp.br/teses/disponiveis/75/75132/tde-23062008-094327/ ;.

Council of Science Editors:

Viana RB. Espectroscopia de infravermelho de cristalitos de surfactantes. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/75/75132/tde-23062008-094327/ ;

6. Amendola, Marcos Coelho. Algoritmo genético e espectroscopia no infravermelho - algumas aplicações na indústria cosmética.

Degree: Mestrado, Química Analítica, 2007, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/46/46133/tde-23042007-171330/ ;

►

Este trabalho discute o desenvolvimento de um algoritmo genético escrito em linguagem VBA para Excel e suas aplicações. O algoritmo elaborado foi utilizado em combinação… (more)

▼

Este trabalho discute o desenvolvimento de um algoritmo genético escrito em linguagem VBA para Excel e suas aplicações. O algoritmo elaborado foi utilizado em combinação com a técnica de FTIR-ATR para o desenvolvimento de metodologias aplicáveis na indústria cosmética e de saneantes, tais como a quantificação de surfactantes e bactericidas. Algumas modificações introduzidas no algoritmo foram estudadas através das aplicações selecionadas, destacando-se a introdução de técnicas de paralelismo que possibilitam a quantificação de mais de um analito em uma mesma execução do algoritmo. Este tipo de técnica foi aplicado na quantificação o-benzil p-cloro fenol, o-fenil fenol e etanol, em uma mistura dos três componentes, utilizada como matéria prima (bactericida) na indústria de saneantes. Também com o uso do algoritmo, FTIR-ATR e calibração linear múltipla, foram desenvolvidos métodos para determinação do ingrediente ativo total da mistura lauril sulfato de amônio/lauril éter sulfato de sódio em amostras de shampoo. Comparados aos métodos usuais de titulação, cromatografia líquida ou gasosa, os novos métodos se distinguem por não requererem preparo algum da mostra, nem consumirem solventes orgânicos, sendo mais rápidos e diretos, oferecendo exatidão comparável.

A genetic algorithm was implemented in VBA for Excel and applied in combination with FTIR-ATR to develop analytical methods for some raw materials and finished products of the home care and personal care industries, like the quantification of surfactants and bactericides. Some modifications were introduced in the traditional genetic algorithm and evaluated for the mentioned applications, with emphasis on parallelism techniques that extend the algorithm to the definition of methods for more than one analyte simultaneously. The parallelistic approach was used for the quantification of o-benzil p-chloro phenol, o-phenyl phenol and ethanol in a mixture of these three components (used as bactericides in home care products). Using the genetic algorithm, FTIR-ATR and multiple linear calibration it was also possible to develop methods to quantify the active ingredient of the ammonium lauryl sulfate/ammonium lauryl ether sulfate mixture (raw material for shampoos), and the concentration of sodium lauryl ether sulfate in commercial samples of shampoos. In comparison with usual methods of analysis, like titrations, gas chromatography or liquid chromatography, the new developed methods are faster and more direct, with comparable accuracy. Furthermore, they do not require any kind of sample pretreatment nor the use of organic solvents.

Advisors/Committee Members: Gutz, Ivano Gebhardt Rolf.

Subjects/Keywords: Algorítmo genético; Artificial intelligence; ATR; ATR; Cosmetic; Cosméticos; Espectroscopia; FTIR; FTIR; Genetic algorithm; Infrared; Infravermelho; Inteligência artificial; Spectroscopy

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APA (6^th Edition):

Amendola, M. C. (2007). Algoritmo genético e espectroscopia no infravermelho - algumas aplicações na indústria cosmética. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/46/46133/tde-23042007-171330/ ;

Chicago Manual of Style (16^th Edition):

Amendola, Marcos Coelho. “Algoritmo genético e espectroscopia no infravermelho - algumas aplicações na indústria cosmética.” 2007. Masters Thesis, University of São Paulo. Accessed June 19, 2019. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-23042007-171330/ ;.

MLA Handbook (7^th Edition):

Amendola, Marcos Coelho. “Algoritmo genético e espectroscopia no infravermelho - algumas aplicações na indústria cosmética.” 2007. Web. 19 Jun 2019.

Vancouver:

Amendola MC. Algoritmo genético e espectroscopia no infravermelho - algumas aplicações na indústria cosmética. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2019 Jun 19]. Available from: http://www.teses.usp.br/teses/disponiveis/46/46133/tde-23042007-171330/ ;.

Council of Science Editors:

Amendola MC. Algoritmo genético e espectroscopia no infravermelho - algumas aplicações na indústria cosmética. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/46/46133/tde-23042007-171330/ ;

7. Martin, Sébastien. Mécanismes de sorption et d'oxydoréduction à l'interface oxyde/solution : couplage chimie / transport : Sorption and redox reactions at water/ oxide interface : coupling chemistry / transport.

Degree: Docteur es, Chimie, 2015, Rennes 1

URL: http://www.theses.fr/2015REN1S157

►

Au vu de l'omniprésence des oxydes de fer dans le milieu naturel, et en particulier la goethite et l'hématite qui sont les formes les plus… (more)

Subjects/Keywords: Interface; Sorption; Oxydoréduction; Transfert; Hématite; Contaminant émergent; Atr-Ftir; Colonne; Interface; Sorption; Redox; Transfer; Hematite; Emerging contaminant; Atr-Ftir; Column

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

APA (6^th Edition):

Martin, S. (2015). Mécanismes de sorption et d'oxydoréduction à l'interface oxyde/solution : couplage chimie / transport : Sorption and redox reactions at water/ oxide interface : coupling chemistry / transport. (Doctoral Dissertation). Rennes 1. Retrieved from http://www.theses.fr/2015REN1S157

Chicago Manual of Style (16^th Edition):

Martin, Sébastien. “Mécanismes de sorption et d'oxydoréduction à l'interface oxyde/solution : couplage chimie / transport : Sorption and redox reactions at water/ oxide interface : coupling chemistry / transport.” 2015. Doctoral Dissertation, Rennes 1. Accessed June 19, 2019. http://www.theses.fr/2015REN1S157.

MLA Handbook (7^th Edition):

Martin, Sébastien. “Mécanismes de sorption et d'oxydoréduction à l'interface oxyde/solution : couplage chimie / transport : Sorption and redox reactions at water/ oxide interface : coupling chemistry / transport.” 2015. Web. 19 Jun 2019.

Vancouver:

Martin S. Mécanismes de sorption et d'oxydoréduction à l'interface oxyde/solution : couplage chimie / transport : Sorption and redox reactions at water/ oxide interface : coupling chemistry / transport. [Internet] [Doctoral dissertation]. Rennes 1; 2015. [cited 2019 Jun 19]. Available from: http://www.theses.fr/2015REN1S157.

Council of Science Editors:

Martin S. Mécanismes de sorption et d'oxydoréduction à l'interface oxyde/solution : couplage chimie / transport : Sorption and redox reactions at water/ oxide interface : coupling chemistry / transport. [Doctoral Dissertation]. Rennes 1; 2015. Available from: http://www.theses.fr/2015REN1S157

Brno University of Technology

8. Pospíšek, Marek. Chemické modifikace polypropylénových povrchů .

Degree: 2014, Brno University of Technology

URL: http://hdl.handle.net/11012/31135

► Diplomová práce je zaměřena na modifikaci a charakterizaci povrchů polypropylenových (PP) výrobků chemickou cestou. V teoretické části jsou shrnuty současné poznatky k tomu tématu, včetně… (more)

▼ Diplomová práce je zaměřena na modifikaci a charakterizaci povrchů polypropylenových (PP) výrobků chemickou cestou. V teoretické části jsou shrnuty současné poznatky k tomu tématu, včetně metod charakterizace. Povrchy polypropylenu byly modifikovány akrylovými monomery (akrylová kyselina, akrylová kyselina s obsahem 20 mol% své sodné soli a akrylamid). Pro charakterizaci modifikovaných povrchů byla použita infračervená spektroskopie s technikou ATR. Srovnávacím parametrem byl karbonylový index stanovený z absorpčních píků methylových skupin (2950 cm-1) a karbonylů (1700-1750 cm-1) FTIR-ATR spekter. Stanovení vlivu koncentrace iniciátoru na průběh modifikace bylo provedeno u acetofenonu a benzofenonu. Benzofenon dosahoval při všech koncentracích vyšších karbonylových indexů. U zmíněných monomerů byla stanovena časová závislost karbonylového indexu v časech 0 až 600 s. Za stejných podmínek byla modifikována testovací tělesa určené pro přípravu lepených spojů. Spoje byly lepeny pomocí kyanoakrylátového lepidla zajišťujícího reakci s povrchem kyseliny polyakrylové. Byly nalezeny podmínky modifikace, které poskytovaly vyšší pevnost lepených spojů než je pevnost výchozího PP. Změna drsnosti profilu byla stanovena pomocí konfokální mikroskopie.; Diploma thesis is focused on modification and characterization of polypropylene (PP) products surfaces by the chemical way. In theoretical part of thesis are summarized the current knowledge of this topic including characterization methods. Polypropylene surfaces were modified by acrylic monomers (acrylic acid, acrylic acid with 20 mol% content of sodium acrylate and acryl amide). Modified surfaces were characterized by infrared spectroscopy with ATR technique. The comparative parameter was carbonyl index determined from absorption peaks of functional methyl groups (2950 cm-1 ) and functional carbonyl groups (1700-1750 cm-1) of FTIR-ATR spectra. Determination of effect of initiator concentration on the modification process was done for acetophenone and benzophenone. There were determined the time dependence of carbonyl index for time from 0 to 600 s of mentioned monomers. In the same condition were modified test specimens designed for preparation of adhesive joints. Joints were bonded by cyanoacrylate adhesive that provide reaction with surface of polyacrylic acid. There were founded conditions of modification that provided strength of adhesive joints higher than strength of original PP. There were identified changes of surface roughness by using of confocal microscopy. Advisors/Committee Members: Kučera, František (advisor).

Subjects/Keywords: Povrch; polypropylen; modifikace; fotoroubování; adheze; FTIR-ATR; akrylová kyselin; akrylamid.; Surface; polypropylene; modification; photografting; adhesion; FTIR-ATR; acrylic acid; acryl amide.

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

APA (6^th Edition):

Pospíšek, M. (2014). Chemické modifikace polypropylénových povrchů . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/31135

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):

Pospíšek, Marek. “Chemické modifikace polypropylénových povrchů .” 2014. Thesis, Brno University of Technology. Accessed June 19, 2019. http://hdl.handle.net/11012/31135.

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

MLA Handbook (7^th Edition):

Pospíšek, Marek. “Chemické modifikace polypropylénových povrchů .” 2014. Web. 19 Jun 2019.

Vancouver:

Pospíšek M. Chemické modifikace polypropylénových povrchů . [Internet] [Thesis]. Brno University of Technology; 2014. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/11012/31135.

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

Council of Science Editors:

Pospíšek M. Chemické modifikace polypropylénových povrchů . [Thesis]. Brno University of Technology; 2014. Available from: http://hdl.handle.net/11012/31135

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

Virginia Tech

9. Haupt, Robert A. Structural Determination of Copolymers from the Cross-catalyzed Reactions of Phenol-formaldehyde and Polymeric Methylenediphenyl Diisocyanate.

Degree: PhD, Learning Sciences and Technologies, 2013, Virginia Tech

URL: http://hdl.handle.net/10919/22025

► This work reports the elucidation of the structure of a copolymer generated by the cross- catalyzed reactions of PF and pMDI prepolymers. The electronic behavior… (more)

▼ This work reports the elucidation of the structure of a copolymer generated by the cross- catalyzed reactions of PF and pMDI prepolymers. The electronic behavior of phenolic monomers as perturbed by alkali metal hydroxides in an aqueous environment was studied with 1H and 13C NMR. Changes in electronic structure and thus reactivity were related to solvated ionic radius, solvent dielectric constant, and their effect on ion generated electric field strength. NMR chemical shifts were used to predict order of reactivity for phenolic model compounds with phenyl isocyanate with good success. As predicted, 2-HMP hydroxymethyl groups were more reactive than 4-HMP in forming urethane bonds under neutral conditions and 2-HMP hydroxymethyl groups were more reactive than 4-HMP in forming urethane bonds under alkaline conditions. The structure of the reaction products of phenol, benzyl alcohol, 2-HMP, and 4-HMP with phenyl isocyanate were studied using 1H and 13C NMR under neutral organic and aqueous alkaline conditions. Reactions in THF-d8 under neutral conditions, without catalyst, were relatively slow, resulting in residual monomer and the precipitation of 1,3-diphenyl urea from the carbamic acid reaction. The reactions of phenol, 2-HMP, and 4-HMP in the presence of TEA catalyst favored the formation of phenyl urethanes (PU). Reactions with benzyl alcohol, 2-HMP, and 4-HMP in the presence of DBTL catalyst favored the formation of benzyl urethanes (BU). Reactions of 2-HMP and 4-HMP led to formation of benzylphenyldiurethane (BPDU). DBTL catalysts favored formation of BDPU strictly by a benzyl urethane pathway, while TEA favored its formation mostly via phenyl urethane, although some BU was also present. Under aqueous alkaline conditions, 2-HMP was more reactive than 4-HMP, exhibiting an enhanced reactivity that was attributed to intramolecular hydrogen bonding and a resulting resonance stabilization of the phenolic aromatic ring. ATR-FTIR spectroscopic studies generated real time structural information for model compound reactions of the cross-catalyzed system, differentiating among reaction peaks generated by the carbamic acid reaction, PU and BU formation. ATR-FTIR also permitted monitoring of propylene carbonate hydrolysis and accelerated alkaline PF resole condensation. ATR-FTIR data also showed that the overall reaction stoichiometry between the PF and pMDI components drove copolymer formation. Benzyl urethane formation predominated under balanced stoichiometric conditions in the presence of ammonium hydroxide, while phenyl urethane formation was favored in its absence. Accelerated phenolic methylene bridge formation became more important when the PF component was in excess in the presence of sufficient accelerator. A high percentage of free isocyanate was present in solid copolymer formed at ambient temperature. The combination of ammonium hydroxide and tin (II) chloride synergistically enhanced the reactivity of the materials, reducing the residual isocyanate. From 13C CP/MAS NMR of the… Advisors/Committee Members: Renneckar, Scott Harold (committeechair), Marand, Herve (committee member), Turner, Sam Richard (committee member), Edgar, Kevin J. (committee member).

Subjects/Keywords: phenol-formaldehyde; PF; polymeric MDI; pMDI; propylene carbonate; polyurethane; acceleration; reactivity; NMR; FTIR; ATR-FTIR

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APA (6^th Edition):

Haupt, R. A. (2013). Structural Determination of Copolymers from the Cross-catalyzed Reactions of Phenol-formaldehyde and Polymeric Methylenediphenyl Diisocyanate. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/22025

Chicago Manual of Style (16^th Edition):

Haupt, Robert A. “Structural Determination of Copolymers from the Cross-catalyzed Reactions of Phenol-formaldehyde and Polymeric Methylenediphenyl Diisocyanate.” 2013. Doctoral Dissertation, Virginia Tech. Accessed June 19, 2019. http://hdl.handle.net/10919/22025.

MLA Handbook (7^th Edition):

Haupt, Robert A. “Structural Determination of Copolymers from the Cross-catalyzed Reactions of Phenol-formaldehyde and Polymeric Methylenediphenyl Diisocyanate.” 2013. Web. 19 Jun 2019.

Vancouver:

Haupt RA. Structural Determination of Copolymers from the Cross-catalyzed Reactions of Phenol-formaldehyde and Polymeric Methylenediphenyl Diisocyanate. [Internet] [Doctoral dissertation]. Virginia Tech; 2013. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/10919/22025.

Council of Science Editors:

Haupt RA. Structural Determination of Copolymers from the Cross-catalyzed Reactions of Phenol-formaldehyde and Polymeric Methylenediphenyl Diisocyanate. [Doctoral Dissertation]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/22025

10. Vasconcelos, Kamilla L. Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures.

Degree: 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7651

► Moisture damage in asphalt mixtures is a complex phenomenon that involves mechanical, chemical, physical and thermodynamic processes. This damage contributes significantly to the premature deterioration… (more)

▼ Moisture damage in asphalt mixtures is a complex phenomenon that involves mechanical, chemical, physical and thermodynamic processes. This damage contributes significantly to the premature deterioration of asphalt pavements, which leads to extra cost in highway maintenance and vehicle operations. One key mechanism of how moisture reaches the asphalt-aggregate interface is by its permeation or diffusion through the asphalt binder or mastic. Different techniques are available for diffusion coefficient measurement of a wide variety of polymersolvent systems. For the asphalt-water system studied, the focus is on two techniques: (i) Fourier Transform Infrared (FTIR)-Attenuated Total Reflectance (ATR) spectrometry and (ii) Gravimetric Sorption Measurements. In the FTIR-ATR experiments, asphalt binders are under investigation. Water shows strong absorption in the infrared region and the FTIR-ATR technique has the ability to monitor both the kinetics of moisture ingress as well as any chemical changes occurring during the test. The changes in concentration can be directly related to change in the absorbance measured during the experiment. The hysteresis of water diffusion in asphalt binders is also monitored through this technique. In the gravimetric sorption experiments, cylindrical Fine Aggregate Mixtures (FAM) were investigated. The gravimetric techniques, which directly follow mass change with time, are among the most used techniques probably because of their simplicity. In this experiment, the Saturated Surface-Dry (SSD) weight of FAM samples at room temperature and at 100 degrees F is monitored until it reaches the equilibrium. The measurements of: (i) water uptake and (ii) the diffusion coefficient were made at both temperatures. A dual mode diffusion model was shown to better represent the diffusion of water through asphalt binders. The rate of moisture diffusion in asphalt binders was proved to be dependent on the history of exposure of the asphalt binder to the moisture. Moisture uptake and diffusivity of water through FAM is dependent on the type of aggregate and asphalt binder used to prepare the FAM. Advisors/Committee Members: Little, Dallas N. (advisor), Lytton, Robert L. (committee member), Masad, Eyad (committee member), Glover, Charles (committee member), Bhasin, Amit (committee member).

Subjects/Keywords: Asphalt; Diffusion, FTIR-ATR

…Electrochemical Impedance Spectroscopy FAM Fine Aggregate Mixtures FTIR-ATR Fourier Transform… …1 3 4 2. MEASUREMENT OF WATER DIFFUSION IN ASPHALT BINDERS USING THE FTIR-ATR TECHNIQUE… …2.2.2 Fourier Transform Infrared Spectroscopy – Attenuated Total Reflectance (FTIR-ATR… …Measurement of Water Diffusion using FTIR-ATR ............................. Results and Discussion… …Steps of the Fitting Process for the Ellipsometric Measurements...... 91 B-11 FTIR-ATR…

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

APA (6^th Edition):

Vasconcelos, K. L. (2011). Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7651

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):

Vasconcelos, Kamilla L. “Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures.” 2011. Thesis, Texas A&M University. Accessed June 19, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7651.

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

MLA Handbook (7^th Edition):

Vasconcelos, Kamilla L. “Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures.” 2011. Web. 19 Jun 2019.

Vancouver:

Vasconcelos KL. Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7651.

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

Council of Science Editors:

Vasconcelos KL. Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7651

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

Universidade do Rio Grande do Norte

11. Menezes, Ana Carolina de Oliveira Neves. Identificação e rastreamento de câncer através da combinação de análise multivariada e técnicas bioespectroscópicas .

Degree: 2017, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/24129

► This thesis reports the application of both infrared and molecular fluorescence spectroscopy, as well as mass spectrometry, combined with multivariate analysis techniques for classification of… (more)

▼ This thesis reports the application of both infrared and molecular fluorescence spectroscopy, as well as mass spectrometry, combined with multivariate analysis techniques for classification of cancerous cells in culture medium and precancerous lesions in blood plasma. In a first study, excitation/emission matrices of molecular fluorescence were obtained for normal (3T3, ARPE, HEK) and cancerous (HepG2, HeLa, HT-29, 786-0) cell lines and classification models were built by using a combination of the algorithms OPLS and UPLS-DA. Correct classification indexes of 100% and 75% were obtained for both classes, Normal and Cancer, respectively. In addition, it was evaluated the influence of the antibodies anti-MMP-2 and anti-MMP-9 in the performance of the classification models. In the presence of the antibodies, the correct classification indexes were considerably improved reaching 100% for both classes, Normal and Cancer, using the algorithms OPLS/UPLS-DA. In a second study, the ATR-FTIR spectroscopy was applied to obtain the spectra of blood plasma of both healthy women (negative for intraepithelial lesion or malignancy, NILM) and women with cervical intraepithelial lesion (SIL) of low grade (LSIL) or high grade (HSIL), caused by HPV virus. Multivariate classification models were built, aiming a screening methodology for cervical cancer. The algorithms PCA-LDA/QDA, SPA-LDA/QDA and GA-LDA/QDA were applied as classification tools and their performance was evaluated. In general, the results obtained by GA-QDA were the most satisfactory, by using only chosen spectral variables that could be related to chemical groups of different biomolecules. The models GA-QDA correctly classified NILM vs. SIL with sensitivity and specificity around 67-94% e 82-94%, respectively. For NILM vs. LSIL, sensitivity and specificity values were about 67-94% e 82-94%, respectively. For NILM vs. HSIL, the sensitivity and specificity values were 76-97% e 73-100%, respectively. In the third study, mass spectrometry was applied to obtain the spectra of lipids extracted from blood plasma of women of NILM (n=42) and SIL (n=34) classes. Multivariate classification models were built by using the classifiers LDA, QDA and SVM. SVM-based models allowed to discriminate the classes with sensitivity and specificity values of 83.3% and 80.0% for NILM and SIL, respectively. Some possible lipids were associated to each class, such as prostaglandins, phospholipids, sphingolipids, Tetranor-PGFM and a hydroperoxide lipid. The results achieved in all studies highlight the potentiality of the spectroscopic and multivariate techniques as possible methodologies for cancer screening, what could effectively contribute to reduce morbidity and mortality caused by cancer. Advisors/Committee Members: Lima, Kassio Michell Gomes de (advisor), 03144855464 (advisor).

Subjects/Keywords: Câncer; Fluorescência molecular; ATR-FTIR; Espectrometria de massas; Análise multivariada

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APA (6^th Edition):

Menezes, A. C. d. O. N. (2017). Identificação e rastreamento de câncer através da combinação de análise multivariada e técnicas bioespectroscópicas . (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/24129

Chicago Manual of Style (16^th Edition):

Menezes, Ana Carolina de Oliveira Neves. “Identificação e rastreamento de câncer através da combinação de análise multivariada e técnicas bioespectroscópicas .” 2017. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed June 19, 2019. http://repositorio.ufrn.br/handle/123456789/24129.

MLA Handbook (7^th Edition):

Menezes, Ana Carolina de Oliveira Neves. “Identificação e rastreamento de câncer através da combinação de análise multivariada e técnicas bioespectroscópicas .” 2017. Web. 19 Jun 2019.

Vancouver:

Menezes ACdON. Identificação e rastreamento de câncer através da combinação de análise multivariada e técnicas bioespectroscópicas . [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2017. [cited 2019 Jun 19]. Available from: http://repositorio.ufrn.br/handle/123456789/24129.

Council of Science Editors:

Menezes ACdON. Identificação e rastreamento de câncer através da combinação de análise multivariada e técnicas bioespectroscópicas . [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/24129

Universidade de Brasília

12. Jefferson Saraiva de Oliveira. Avaliação da qualidade de biodiesel por espectroscopias ftir e ftnir associadas à quimiometria.

Degree: 2007, Universidade de Brasília

URL: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2429

► Após a introdução do biodiesel na matriz energética Brasileira, se tornou necessária a avaliação da qualidade deste tipo de combustível seguindo normas estabelecidas pela Agência… (more)

▼ Após a introdução do biodiesel na matriz energética Brasileira, se tornou necessária a avaliação da qualidade deste tipo de combustível seguindo normas estabelecidas pela Agência Nacional do Petróleo (ANP). A possibilidade do uso de diferentes fontes de óleos vegetais na produção do biodiesel gera problemas relacionados à produção e qualidade deste combustível, abrindo precedentes para fraudes fiscais. Considerando esta demanda socioeconômica, a proposta é o uso de técnicas espectroscópicas combinadas com ferramentas quimiométricas como métodos para determinar o teor de ésteres metílicos (biodiesel) nas misturas diesel/biodiesel. Neste trabalho as técnicas espectroscópicas FTIR-ATR (Infravermelho com transformada de Fourier - reflectância total atenuada) e FTNIR (Infravermelho Próximo com transformada de Fourier) combinadas com a análise de PLS (Regressão por Mínimos Quadrados Parciais) e de ANN (rede neural artificial) foram empregadas. Os ésteres metílicos usados para preparar as amostras da calibração foram obtidos pela metanólise dos óleos de soja, babaçu, dendê e de óleo de soja usado em frituras. Sua pureza foi avaliada por cromatografia gasosa (GC-FID). As amostras foram separadas em dois grupos: Grupo I, misturas binárias (diesel + um tipo de éster metílico), correspondendo a 96 misturas do biodiesel (0-100%, m/m), e Grupo II, misturas quaternárias (diesel + três tipos de ésteres metílicos), correspondendo a 60 misturas do biodiesel (0-100%, m/m). Os resultados de PLS mostraram que o modelo de FTNIR para o Grupo I é mais preciso e exato ( 0,02 e 0,06%, m/m). No caso do Grupo II, os modelos de PLS (FTIR-ATR e FTNIR) apresentaram as mesmas exatidões, enquanto os modelos de ANN/FTNIR apresentaram melhor desempenho do que os modelos de ANN/FTIR-ATR. A melhor exatidão foi obtida pelo modelo de ANN/FTNIR para a determinação diesel (0,14%, m/m), já o modelo de ANN/FTIR-ATR para o dendê (0,6%, m/m) apresentou um desempenho inferior. As precisões na análise do Grupo II variaram de 0,06 a 0,53% (m/m) e os coeficientes de variação foram melhores que 3%, indicando que estes modelos são apropriados para a determinação das misturas diesel-biodiesel compostas por ésteres metílicos derivados de diferentes óleos vegetais. Advisors/Committee Members: Tereza Cristina Monteiro Pastore, Claudia Jorge do Nascimento, Joel Camargo Rubim, Paulo Anselmo Ziani Suarez.

Subjects/Keywords: biodiesel; FTIR-ATR; FTNIR; rede neural; combustível; QUIMICA; PLS

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

APA (6^th Edition):

Oliveira, J. S. d. (2007). Avaliação da qualidade de biodiesel por espectroscopias ftir e ftnir associadas à quimiometria. (Thesis). Universidade de Brasília. Retrieved from http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2429

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, Jefferson Saraiva de. “Avaliação da qualidade de biodiesel por espectroscopias ftir e ftnir associadas à quimiometria.” 2007. Thesis, Universidade de Brasília. Accessed June 19, 2019. http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2429.

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, Jefferson Saraiva de. “Avaliação da qualidade de biodiesel por espectroscopias ftir e ftnir associadas à quimiometria.” 2007. Web. 19 Jun 2019.

Vancouver:

Oliveira JSd. Avaliação da qualidade de biodiesel por espectroscopias ftir e ftnir associadas à quimiometria. [Internet] [Thesis]. Universidade de Brasília; 2007. [cited 2019 Jun 19]. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2429.

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

Council of Science Editors:

Oliveira JSd. Avaliação da qualidade de biodiesel por espectroscopias ftir e ftnir associadas à quimiometria. [Thesis]. Universidade de Brasília; 2007. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2429

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

University of Cincinnati

13. Ibrahim, Sarah A. A Structure-Enhancement Relationship and Mechanistic Study of Chemical Enhancers on Human Epidermal Membrane based on Maximum Enhancement Effect (Emax).

Degree: PhD, Pharmacy : Pharmaceutical Sciences, 2010, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1266598335

► Transdermal pharmaceutical formulations, in most cases, contain chemical penetration enhancers. To properly select efficient chemical enhancers, an understanding of their mechanism(s) of action is essential.… (more)

▼ Transdermal pharmaceutical formulations, in most cases, contain chemical penetration enhancers. To properly select efficient chemical enhancers, an understanding of their mechanism(s) of action is essential. This dissertation evaluated the enhancement effects of known topical or cosmetic ingredients on human epidermal membrane (HEM) permeation. Permeation enhancement effect, Emax, was identified as enhancement effect induced by the enhancer on HEM permeation as the enhancer approaches the thermodynamic activity of its pure state in equilibrium with HEM. A structure enhancement relationship was established for the chemical enhancers studied. Emax was shown to be dependent of the lipophilicities. A guideline for the selection of chemical enhancers based on efficiency and duration of enhancement was determined based on octanol/water partition coefficient and calculated n-octanol solubility. This dissertation also studied topical formulations consisting of a volatile carrier system containing the chemical enhancers. To fully understand the enhancer induced permeation enhancement mechanism, the transport domain of skin i.e., the stratum corneum (SC) lipid domain was probed. This involved the determination of both enhancer and permeant uptake into the lipid domain of SC following enhancer treatment. It was concluded that the permeation enhancement mechanism is attributed to the enhancement of permeant partitioning into the transport rate limiting domain. Liposomes formulated from extracted human stratum corneum lipids (EHSCLL) were characterized and used to directly study this domain. The uptake of the chemical enhancers within the EHSCLL was determined and the results suggested a quantitative relationship between enhancer uptake in EHSCLL and enhancer efficiency. DSC and ATR-FTIR studies using enhancer treated intact SC supported that the mechanism of chemical enhancers is via their fluidization and perturbation of the SC lipid bilayer. This finding suggests that the enhancers induce both a polarity shift in the SC lipid domain and a decrease in lipid microviscosity through lipid fluidization in the SC. Advisors/Committee Members: Li, Kevin (Committee Chair).

Subjects/Keywords: Pharmaceuticals; Skin; Chemical Enhancers; DSC; ATR-FTIR; Transdermal; Liposomes

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APA (6^th Edition):

Ibrahim, S. A. (2010). A Structure-Enhancement Relationship and Mechanistic Study of Chemical Enhancers on Human Epidermal Membrane based on Maximum Enhancement Effect (Emax). (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1266598335

Chicago Manual of Style (16^th Edition):

Ibrahim, Sarah A. “A Structure-Enhancement Relationship and Mechanistic Study of Chemical Enhancers on Human Epidermal Membrane based on Maximum Enhancement Effect (Emax).” 2010. Doctoral Dissertation, University of Cincinnati. Accessed June 19, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1266598335.

MLA Handbook (7^th Edition):

Ibrahim, Sarah A. “A Structure-Enhancement Relationship and Mechanistic Study of Chemical Enhancers on Human Epidermal Membrane based on Maximum Enhancement Effect (Emax).” 2010. Web. 19 Jun 2019.

Vancouver:

Ibrahim SA. A Structure-Enhancement Relationship and Mechanistic Study of Chemical Enhancers on Human Epidermal Membrane based on Maximum Enhancement Effect (Emax). [Internet] [Doctoral dissertation]. University of Cincinnati; 2010. [cited 2019 Jun 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1266598335.

Council of Science Editors:

Ibrahim SA. A Structure-Enhancement Relationship and Mechanistic Study of Chemical Enhancers on Human Epidermal Membrane based on Maximum Enhancement Effect (Emax). [Doctoral Dissertation]. University of Cincinnati; 2010. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1266598335

The Ohio State University

14. Lin, Shin-Jie. Development of Edible Packaging for Selected Food Processing Applications.

Degree: PhD, Food Science and Technology, 2012, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1349125959

► Edible packaging (coatings and films) has been used to improve the shelf life, sensory attributes and nutritional content of food products. The manufacturing process for… (more)

▼ Edible packaging (coatings and films) has been used to improve the shelf life, sensory attributes and nutritional content of food products. The manufacturing process for edible packaging depends on the properties of the ingredients and the application end use. The objective of this study was to optimize the method for commercial-scale chitosan film production. This was done by optimizing the raw ingredient selection, and blending sequence. Quality control tests were used to monitor these include viscosity, the drying rate of the ingredient slurries, film solubility, chemical compositions, as well as the thermal properties of the edible films made during the study. The first part of this dissertation (Chapter 2) focuses on the effects of solvents on the film properties. Edible slurries were prepared by dissolving 1.0-2.0% chitosan in 1.0% food-grade acetic or lactic acids with 0-20% ethanol solutions. Viscosities of the different film formulations were measured using a viscometer, and changes in drying time were determined using a OHAUS Moisture Determination Balance. Solubility of the films was determined by dissolving the dried films in water then measuring the weight changes. The chemical compositions of the polymeric chains were identified by Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectroscopy. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to characterize changes to the thermal properties of the films as a result of the various treatments. Results indicated that viscosity of the slurries significantly (p< 0.05) increased with increasing chitosan and ethanol concentrations. ATR-FTIR spectra showed that acetic acid/chitosan provided more carboxyl (1442 cm-1) and amine groups (1573 cm-1) within the polymeric network when compared to the lactic acid/chitosan films. The addition of 20% ethanol significantly (p< 0.05) enhanced the drying rate of the film by 30%. However, additional ethanol did not have a significant influence on the solubility and thermal properties of the films. The second part of this dissertation (Chapter 3 and Chapter 4) reports two methods for incorporating vitamin E into the chitosan. Edible chitosan slurries were prepared by blending 250 or 500 mg vitamin E into1.0- 2.0% chitosan. Two blending processes were used to incorporate the vitamin E into the edible slurries: (1) the vitamin E added before lecithin (VE first); and (2) the vitamin E mixed with lecithin (VE mixed) and then added into the slurries. Viscosities of the various formulations, thermal properties, the chemical compositions and solubilities of the film samples were done as mentioned before. High performance liquid chromotagraphy (HPLC) was used to determine the concentration of vitamin E in the films. This study found that vitamin E addition significantly (p< 0.05) affected the rheology of the edible slurries. In addition, viscosity increased with increasing chitosan and vitamin E concentrations. Low chitosan concentrations in the formulation decreased vitamin E… Advisors/Committee Members: Pascall, Melvin (Advisor).

Subjects/Keywords: Food Science; edible film; chitosan; vitamin E; thermal analysis; ATR-FTIR

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

APA (6^th Edition):

Lin, S. (2012). Development of Edible Packaging for Selected Food Processing Applications. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1349125959

Chicago Manual of Style (16^th Edition):

Lin, Shin-Jie. “Development of Edible Packaging for Selected Food Processing Applications.” 2012. Doctoral Dissertation, The Ohio State University. Accessed June 19, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1349125959.

MLA Handbook (7^th Edition):

Lin, Shin-Jie. “Development of Edible Packaging for Selected Food Processing Applications.” 2012. Web. 19 Jun 2019.

Vancouver:

Lin S. Development of Edible Packaging for Selected Food Processing Applications. [Internet] [Doctoral dissertation]. The Ohio State University; 2012. [cited 2019 Jun 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1349125959.

Council of Science Editors:

Lin S. Development of Edible Packaging for Selected Food Processing Applications. [Doctoral Dissertation]. The Ohio State University; 2012. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1349125959

Georgia State University

15. Titus, Jitto. INFRARED DIAGNOSTICS ON MICRO AND NANO SCALE STRUCTURES.

Degree: PhD, Physics and Astronomy, 2016, Georgia State University

URL: https://scholarworks.gsu.edu/phy_astr_diss/88

► Fourier Transform Infrared spectroscopy is used as a diagnostic tool in biological and physical sciences by characterizing the samples based on infrared light-matter interaction.… (more)

▼ Fourier Transform Infrared spectroscopy is used as a diagnostic tool in biological and physical sciences by characterizing the samples based on infrared light-matter interaction. In the case of biological samples, Activation of Jurkat T-cells in culture following treatment with anti-CD3 (Cluster of Differentiation 3) antibody is detectable by interrogating the treated T-cells using the Attenuated Total Reflection - Fourier Transform Infrared (ATR-FTIR) Spectroscopy technique. Cell activation was detected within 75 minutes after the cells encountered specific immunoglobulin molecules. Spectral markers noted following ligation of the CD3 receptor with anti CD3 antibody provides proof-of-concept that ATR-FTIR spectroscopy is a sensitive measure of molecular events subsequent to cells interacting with anti-CD3 Immunoglobulin G (IgG). ATR-FTIR spectroscopy is also used to screen for Colitis in chronic (Interleukin 10 knockout) and acute (Dextran Sodium Sulphate-induced) models. Arthritis (Collagen Antibody Induced Arthritis) and metabolic syndrome (Toll like receptor 5 knockout) models are also tested as controls. The marker identified as mannose uniquely screens and distinguishes the colitic from the non-colitic samples and the controls. The reference or the baseline spectrum could be the pooled and averaged spectra of non-colitic samples or the subject’s previous sample spectrum. The circular dichroism of titanium-doped silver chiral nanorod arrays grown using the glancing angle deposition (GLAD) method is investigated in the visible and near infrared ranges using transmission ellipsometry and spectroscopy. The characteristics of these circular polarization effects are strongly influenced by the morphology of the deposited arrays. Studies of optical phonon modes in nearly defect-free GaN nanowires embedded with intrinsic InGaN quantum dots by using oblique angle transmission infrared spectroscopy is described here. These phonon modes are dependent on the nanowire fill-factor, doping densities of the nanowires and the presence of InGaN dots. These factors can be applied for potential phonon based photodetectors whose spectral responses can be tailored by varying a combination of these three parameters. The optical anisotropy along the growth (c-) axis of the GaN nanowire contributes to the polarization agility of such potential photodetectors. Advisors/Committee Members: A.G. Unil Perera, Julia Hilliard, Didier Merlin, Yiping Zhao, Vadym Apalkov, Alexander Kozhanov, Fabien Baron.

Subjects/Keywords: ATR-FTIR; Infrared Spectroscopy; Dichroism; Photodetectors; Colitis; Serum; Infection; Infrared Diagnosis

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APA (6^th Edition):

Titus, J. (2016). INFRARED DIAGNOSTICS ON MICRO AND NANO SCALE STRUCTURES. (Doctoral Dissertation). Georgia State University. Retrieved from https://scholarworks.gsu.edu/phy_astr_diss/88

Chicago Manual of Style (16^th Edition):

Titus, Jitto. “INFRARED DIAGNOSTICS ON MICRO AND NANO SCALE STRUCTURES.” 2016. Doctoral Dissertation, Georgia State University. Accessed June 19, 2019. https://scholarworks.gsu.edu/phy_astr_diss/88.

MLA Handbook (7^th Edition):

Titus, Jitto. “INFRARED DIAGNOSTICS ON MICRO AND NANO SCALE STRUCTURES.” 2016. Web. 19 Jun 2019.

Vancouver:

Titus J. INFRARED DIAGNOSTICS ON MICRO AND NANO SCALE STRUCTURES. [Internet] [Doctoral dissertation]. Georgia State University; 2016. [cited 2019 Jun 19]. Available from: https://scholarworks.gsu.edu/phy_astr_diss/88.

Council of Science Editors:

Titus J. INFRARED DIAGNOSTICS ON MICRO AND NANO SCALE STRUCTURES. [Doctoral Dissertation]. Georgia State University; 2016. Available from: https://scholarworks.gsu.edu/phy_astr_diss/88

Queensland University of Technology

16. Barton, Paul Matthew John. A forensic investigation of single human hair fibres using FTIR-ATR spectroscopy and chemometrics.

Degree: 2011, Queensland University of Technology

URL: https://eprints.qut.edu.au/41873/

► Human hair fibres are ubiquitous in nature and are found frequently at crime scenes often as a result of exchange between the perpetrator, victim and/or… (more)

▼ Human hair fibres are ubiquitous in nature and are found frequently at crime scenes often as a result of exchange between the perpetrator, victim and/or the surroundings according to Locard's Principle. Therefore, hair fibre evidence can provide important information for crime investigation. For human hair evidence, the current forensic methods of analysis rely on comparisons of either hair morphology by microscopic examination or nuclear and mitochondrial DNA analyses. Unfortunately in some instances the utilisation of microscopy and DNA analyses are difficult and often not feasible. This dissertation is arguably the first comprehensive investigation aimed to compare, classify and identify the single human scalp hair fibres with the aid of FTIR-ATR spectroscopy in a forensic context. Spectra were collected from the hair of 66 subjects of Asian, Caucasian and African (i.e. African-type). The fibres ranged from untreated to variously mildly and heavily cosmetically treated hairs. The collected spectra reflected the physical and chemical nature of a hair from the near-surface particularly, the cuticle layer. In total, 550 spectra were acquired and processed to construct a relatively large database. To assist with the interpretation of the complex spectra from various types of human hair, Derivative Spectroscopy and Chemometric methods such as Principal Component Analysis (PCA), Fuzzy Clustering (FC) and Multi-Criteria Decision Making (MCDM) program; Preference Ranking Organisation Method for Enrichment Evaluation (PROMETHEE) and Geometrical Analysis for Interactive Aid (GAIA); were utilised. FTIR-ATR spectroscopy had two important advantages over to previous methods: (i) sample throughput and spectral collection were significantly improved (no physical flattening or microscope manipulations), and (ii) given the recent advances in FTIR-ATR instrument portability, there is real potential to transfer this work.s findings seamlessly to on-field applications. The "raw" spectra, spectral subtractions and second derivative spectra were compared to demonstrate the subtle differences in human hair. SEM images were used as corroborative evidence to demonstrate the surface topography of hair. It indicated that the condition of the cuticle surface could be of three types: untreated, mildly treated and treated hair. Extensive studies of potential spectral band regions responsible for matching and discrimination of various types of hair samples suggested the 1690-1500 cm^-1 IR spectral region was to be preferred in comparison with the commonly used 1750-800 cm^-1. The principal reason was the presence of the highly variable spectral profiles of cystine oxidation products (1200-1000 cm^-1), which contributed significantly to spectral scatter and hence, poor hair sample matching. In the preferred 1690-1500 cm^-1 region, conformational changes in the keratin protein attributed to the α-helical to β-sheet transitions in the Amide I and Amide II vibrations and played a significant role in…

Subjects/Keywords: human hair; forensic investigation; hair fibres; FTIR-ATR spectroscopy; chemometrics

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

APA (6^th Edition):

Barton, P. M. J. (2011). A forensic investigation of single human hair fibres using FTIR-ATR spectroscopy and chemometrics. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/41873/

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):

Barton, Paul Matthew John. “A forensic investigation of single human hair fibres using FTIR-ATR spectroscopy and chemometrics.” 2011. Thesis, Queensland University of Technology. Accessed June 19, 2019. https://eprints.qut.edu.au/41873/.

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

MLA Handbook (7^th Edition):

Barton, Paul Matthew John. “A forensic investigation of single human hair fibres using FTIR-ATR spectroscopy and chemometrics.” 2011. Web. 19 Jun 2019.

Vancouver:

Barton PMJ. A forensic investigation of single human hair fibres using FTIR-ATR spectroscopy and chemometrics. [Internet] [Thesis]. Queensland University of Technology; 2011. [cited 2019 Jun 19]. Available from: https://eprints.qut.edu.au/41873/.

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

Council of Science Editors:

Barton PMJ. A forensic investigation of single human hair fibres using FTIR-ATR spectroscopy and chemometrics. [Thesis]. Queensland University of Technology; 2011. Available from: https://eprints.qut.edu.au/41873/

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

Universidade do Rio Grande do Norte

17. Jales, Jéssica Teixeira. Utilização da espectroscopia com análise multivariada na identificação de diferentes DTUs do Trypanosoma cruzi em Triatoma brasiliensis infectados experimentalmente .

Degree: 2018, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/25523

► The Trypanosoma cruzi infection is a public health problem and it is substancial that its diagnosis be performed quickly and efficiently. However, the techniques applied… (more)

▼ The Trypanosoma cruzi infection is a public health problem and it is substancial that its diagnosis be performed quickly and efficiently. However, the techniques applied on the diagnosis of T. cruzi infection present low sensitivity and specificity regarding the entomological and epidemiological surveillance of the parasite. Considering this problem, the biospectroscopy with the use of ATR-FTIR was used in this study to evaluate its efficiency in the identification of the experimental infection of Triatoma brasiliensis by different DTUs of T. cruzi. The standardization of the calibration model included the use of fourth and fifth instars of T. brasiliensis, which were infected with different DTUs of the parasite (TcI, TcII, TcIII or mixed infection) at a concentration of 40,000 parasites / ml of blood. Followed 15 and 30 days after infection (DAI), infrared spectra were collected from the abdomen of each insect; 30 DAI, intestinal wastes were collected and later used for kDNA analysis. The standardization of the calibration model showed that the application of the mild-infrared using the ATR-FTIR distinguished the triatomines that were not infected and experimentally infected with T. cruzi. In addition, the technique was able to identify the DTUs used, separating the 5 distinct groups only with the exploratory data analysis through the application of Principal Component Analysis (PCA), which differentially identified protein clusters, nucleic acids and to a lesser extent, lipids. The kDNA analysis confirmed 92.5% of the infected insects, while the ATR-FTIR correctly identified all samples. Thus, biospectroscopy applied with the use of ATR-FTIR was efficient in the identification of the T. brasiliensis infection by T. cruzi, and could be used as a diagnostic tool for the future, assisting in the entomological surveillance of the infection by this parasite. Advisors/Committee Members: Gama, Renata Antonaci (advisor), 03893282602 (advisor), Camara, Antonia Cláudia Jácome da (advisor), 43007600472 (advisor).

Subjects/Keywords: Trypanosoma cruzi; Triatoma brasiliensis; Bioespectroscopia; ATR-FTIR; Análise quimiométrica; Quimiometria

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APA (6^th Edition):

Jales, J. T. (2018). Utilização da espectroscopia com análise multivariada na identificação de diferentes DTUs do Trypanosoma cruzi em Triatoma brasiliensis infectados experimentalmente . (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/25523

Chicago Manual of Style (16^th Edition):

Jales, Jéssica Teixeira. “Utilização da espectroscopia com análise multivariada na identificação de diferentes DTUs do Trypanosoma cruzi em Triatoma brasiliensis infectados experimentalmente .” 2018. Masters Thesis, Universidade do Rio Grande do Norte. Accessed June 19, 2019. http://repositorio.ufrn.br/handle/123456789/25523.

MLA Handbook (7^th Edition):

Jales, Jéssica Teixeira. “Utilização da espectroscopia com análise multivariada na identificação de diferentes DTUs do Trypanosoma cruzi em Triatoma brasiliensis infectados experimentalmente .” 2018. Web. 19 Jun 2019.

Vancouver:

Jales JT. Utilização da espectroscopia com análise multivariada na identificação de diferentes DTUs do Trypanosoma cruzi em Triatoma brasiliensis infectados experimentalmente . [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2018. [cited 2019 Jun 19]. Available from: http://repositorio.ufrn.br/handle/123456789/25523.

Council of Science Editors:

Jales JT. Utilização da espectroscopia com análise multivariada na identificação de diferentes DTUs do Trypanosoma cruzi em Triatoma brasiliensis infectados experimentalmente . [Masters Thesis]. Universidade do Rio Grande do Norte; 2018. Available from: http://repositorio.ufrn.br/handle/123456789/25523

Virginia Tech

18. Clark, Spencer C. ATR-FTIR Measurements of Cationic Surfactant Exchange Rates at the Solid-Liquid Interface.

Degree: MS, Chemistry, 2003, Virginia Tech

URL: http://hdl.handle.net/10919/34116

► In many experiments, surfactant adsorption and desorption at solid-liquid interfaces is found to be quite slow, considering that surfactants are small molecules. Attenuated total reflectance… (more)

Subjects/Keywords: Kinetics; Adsorption; ATR-FTIR; Surfactant

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APA (6^th Edition):

Clark, S. C. (2003). ATR-FTIR Measurements of Cationic Surfactant Exchange Rates at the Solid-Liquid Interface. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/34116

Chicago Manual of Style (16^th Edition):

Clark, Spencer C. “ATR-FTIR Measurements of Cationic Surfactant Exchange Rates at the Solid-Liquid Interface.” 2003. Masters Thesis, Virginia Tech. Accessed June 19, 2019. http://hdl.handle.net/10919/34116.

MLA Handbook (7^th Edition):

Clark, Spencer C. “ATR-FTIR Measurements of Cationic Surfactant Exchange Rates at the Solid-Liquid Interface.” 2003. Web. 19 Jun 2019.

Vancouver:

Clark SC. ATR-FTIR Measurements of Cationic Surfactant Exchange Rates at the Solid-Liquid Interface. [Internet] [Masters thesis]. Virginia Tech; 2003. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/10919/34116.

Council of Science Editors:

Clark SC. ATR-FTIR Measurements of Cationic Surfactant Exchange Rates at the Solid-Liquid Interface. [Masters Thesis]. Virginia Tech; 2003. Available from: http://hdl.handle.net/10919/34116

Oklahoma State University

19. Hardin, James Albert. In Situ Sensing of Leaf Cuticular Wax, Pecan Yield and Pecan Leaf Nitrogen Concentration.

Degree: Biosystems and Agricultural Engineering, 2012, Oklahoma State University

URL: http://hdl.handle.net/11244/6410

► The objectives of this study were to develop technologies to enable in situ sensing of plant physiological conditions. Three differenet studies were conducted. Cuticular wax… (more)

Subjects/Keywords: cuticular wax; ftir-atr; microwave; nitrogen; pecan; sensing

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APA (6^th Edition):

Hardin, J. A. (2012). In Situ Sensing of Leaf Cuticular Wax, Pecan Yield and Pecan Leaf Nitrogen Concentration. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/6410

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):

Hardin, James Albert. “In Situ Sensing of Leaf Cuticular Wax, Pecan Yield and Pecan Leaf Nitrogen Concentration.” 2012. Thesis, Oklahoma State University. Accessed June 19, 2019. http://hdl.handle.net/11244/6410.

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

MLA Handbook (7^th Edition):

Hardin, James Albert. “In Situ Sensing of Leaf Cuticular Wax, Pecan Yield and Pecan Leaf Nitrogen Concentration.” 2012. Web. 19 Jun 2019.

Vancouver:

Hardin JA. In Situ Sensing of Leaf Cuticular Wax, Pecan Yield and Pecan Leaf Nitrogen Concentration. [Internet] [Thesis]. Oklahoma State University; 2012. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/11244/6410.

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

Council of Science Editors:

Hardin JA. In Situ Sensing of Leaf Cuticular Wax, Pecan Yield and Pecan Leaf Nitrogen Concentration. [Thesis]. Oklahoma State University; 2012. Available from: http://hdl.handle.net/11244/6410

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

Cranfield University

20. Kerssens, Marleen Maartje. Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy.

Degree: PhD, 2012, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/7924 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571995

► The accurate and safe diagnosis of breast cancer is a significant societal issue, with annual disease incidence of 48,000 women and around 370 men in… (more)

▼ The accurate and safe diagnosis of breast cancer is a significant societal issue, with annual disease incidence of 48,000 women and around 370 men in the UK. Early diagnosis of the disease allows more conservative treatments and better patient outcomes. Microcalcifications in breast tissue are an important indicator for breast cancers, and often the only sign of their presence. Several studies have suggested that the type of calcification formed may act as a marker for malignancy and its presence may be of biological significance. In this work, breast calcifications are studied with FTIR, synchrotron FTIR, ATR FTIR, and Raman mapping to explore their disease specific composition. From a comparison between vibrational spectroscopy and routine staining procedures it becomes clear that calcium builds up prior to calcification formation. Raman and FTIR indicate the same size for calcifications and are in agreement with routine staining techniques. From the synchrotron FTIR measurements it can be proven that amide is present in the centre of the calcifications and the intensity of the bands depends on the pathology. Special attention is paid to the type of carbonate substitution in the calcifications relating to different pathology grades. In contrast to mammography, Raman spectroscopy has the capability to distinguish calcifications based on their chemical composition. The ultimate goal is to turn the acquired knowledge from the mapping studies into a clinical tool based on deep Raman spectroscopy. Deep Raman techniques have a considerable potential to reduce large numbers of normal biopsies, reduce the time delay between screening and diagnosis and therefore diminish patient anxiety. In order to achieve this, a deep Raman system is designed and after evaluation of its performance tested on buried calcification standards in porcine soft tissue and human mammary tissue. It is shown that, when the calcification is probed through tissue, the strong 960 cm-1 phosphate band can be used as a pseudo marker for carbonate substitution which is related to the pathology of the surrounding tissue. Furthermore, the first study in which human breast calcifications are measured in bulk tissue with a thickness of several millimetres to centimetres is presented. To date, measurements have been performed at 41 specimens with a thickness up to 25 mm. Measurements could be performed through skin and blue dye. The proposed deep Raman technique is promising for probing of calcifications through tissue but will need refinement before being adopted in hospitals.

Subjects/Keywords: 615.1; Breast cancer; apatite; FTIR (Fourier Transform InfraRed); synchrotron FTIR; ATR (attenuated total reflection); Raman mapping; deep Raman; Transmission Raman spectroscopy

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❌

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

APA (6^th Edition):

Kerssens, M. M. (2012). Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy. (Doctoral Dissertation). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/7924 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571995

Chicago Manual of Style (16^th Edition):

Kerssens, Marleen Maartje. “Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy.” 2012. Doctoral Dissertation, Cranfield University. Accessed June 19, 2019. http://dspace.lib.cranfield.ac.uk/handle/1826/7924 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571995.

MLA Handbook (7^th Edition):

Kerssens, Marleen Maartje. “Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy.” 2012. Web. 19 Jun 2019.

Vancouver:

Kerssens MM. Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy. [Internet] [Doctoral dissertation]. Cranfield University; 2012. [cited 2019 Jun 19]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/7924 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571995.

Council of Science Editors:

Kerssens MM. Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy. [Doctoral Dissertation]. Cranfield University; 2012. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/7924 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571995

21. Carolei, Luciano. Determinação de surfactantes e água em formulações de sabonetes líquidos e shampoos por infravermelho por transformada de Fourier (FTIR) utilizando a técnica de reflectância total atenuada (ATR).

Degree: PhD, Química Analítica, 2005, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/46/46133/tde-29102007-143925/ ;

►

Demonstrou-se pela primeira vez que é possível determinar surfactantes e água em formulações de Sabonetes Líquidos (SL) e Shampoos (SH), direta e simultaneamente pela técnica… (more)

▼

Demonstrou-se pela primeira vez que é possível determinar surfactantes e água em formulações de Sabonetes Líquidos (SL) e Shampoos (SH), direta e simultaneamente pela técnica de infravermelho por transformada de Fourier (FTIR) acoplada à uma cela de reflectância total atenuada (ATR). Tradicionalmente, a principal aplicação do infravermelho médio (2,50 - 15,0 µm) é a identificação de compostos orgânicos. O desenvolvimento de novos acessórios, principalmente de ATR, os avanços na área de microinformática e de métodos quimiométricos, vem viabilizando as análises quantitativas rápidas com excelentes resultados mesmo em meio aquoso. A determinação simultânea de surfactantes em formulações por FTIR-ATR é investigada em detalhes nesta tese. Dentre os surfactantes utilizados, o Lauril Éter Sulfato de Sódio (LESS) e a Cocoamidopropil Betaína (CAPB) são comuns em ambas as formulações, sendo a Coco Dietanolamida (CDEA) empregada em shampoo e o Alquilpoliglicosídeo (APG) em sabonete líquido. Espectros de absorbância de amostras padrão e de verificação foram adquiridos na região do infravermelho médio (800-1600 e 1900-3000 cm-I). Para a regressão de mínimos quadrados clássicos (CLSR), selecionou-se 200 números de onda, enquanto que para a regressão de mínimos quadrados inversos (ILSR), apenas 10. Nas regressões de componentes principais (PCR) e de mínimos quadrados parciais (PLSRI e PLSR2), utilizaram-se de 300 à 1100 números de onda. Dois conjuntos de amostras padrão foram preparados, o primeiro, contendo 27 misturas padrão, foi estudado somente pelos métodos CLSR e ILSR, enquanto que o segundo conjunto, contendo 48 amostras padrão, foi avaliado por todos os métodos mencionados acima. A seleção das regiões de quantificação favoreceu números de onda dos componentes minoritários CAPB, APG e CDEA e resultados satisfatórios foram encontrados para 18 amostras de shampoo e sabonete líquido. Interferentes como NaCl e perfume foram incluídos no segundo conjunto e os métodos PCR e PLSR proporcionaram melhores resultados. Os erros relativos (RSEP%) para água (correspondendo a 84-88% do produto) e LESS (6-10%) não excederam 1%; para CAPB (<3%) e CDEA (<2%), o RSEP% situou-se entre de 2-4% e para APG (<3%), não excedeu 5%. Avaliações do processo de normalização, repetibilidade, vulnerabilidade a interferentes (perfumes), redução no número de padrões de calibração foram conduzidos, encontrando-se resultados satisfatórios para todos os casos, com erro relativo inferior à 5,0%. Um dispositivo simples para injeção direta da amostras no acessório de ATR foi construído, permitindo aumentar a freqüência analítica de 20 para 60 análises por hora.

It is demonstrated for the first time that the principal constituents of a shampoo as well as of a liquid soap -three surfactants and water- can be determined directly, simultaneously and quickly in undiluted samples by Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) spectroscopy in the middle infrared region, despite the broad absorption bands ofthe solvent. The main…

Advisors/Committee Members: Gutz, Ivano Gebhardt Rolf.

Subjects/Keywords: ATR; FTIR; FTIR; Multivariate; Multivariável; Surfactantes; Surfactants; TR

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❌

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

APA (6^th Edition):

Carolei, L. (2005). Determinação de surfactantes e água em formulações de sabonetes líquidos e shampoos por infravermelho por transformada de Fourier (FTIR) utilizando a técnica de reflectância total atenuada (ATR). (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/46/46133/tde-29102007-143925/ ;

Chicago Manual of Style (16^th Edition):

Carolei, Luciano. “Determinação de surfactantes e água em formulações de sabonetes líquidos e shampoos por infravermelho por transformada de Fourier (FTIR) utilizando a técnica de reflectância total atenuada (ATR).” 2005. Doctoral Dissertation, University of São Paulo. Accessed June 19, 2019. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-29102007-143925/ ;.

MLA Handbook (7^th Edition):

Carolei, Luciano. “Determinação de surfactantes e água em formulações de sabonetes líquidos e shampoos por infravermelho por transformada de Fourier (FTIR) utilizando a técnica de reflectância total atenuada (ATR).” 2005. Web. 19 Jun 2019.

Vancouver:

Carolei L. Determinação de surfactantes e água em formulações de sabonetes líquidos e shampoos por infravermelho por transformada de Fourier (FTIR) utilizando a técnica de reflectância total atenuada (ATR). [Internet] [Doctoral dissertation]. University of São Paulo; 2005. [cited 2019 Jun 19]. Available from: http://www.teses.usp.br/teses/disponiveis/46/46133/tde-29102007-143925/ ;.

Council of Science Editors:

Carolei L. Determinação de surfactantes e água em formulações de sabonetes líquidos e shampoos por infravermelho por transformada de Fourier (FTIR) utilizando a técnica de reflectância total atenuada (ATR). [Doctoral Dissertation]. University of São Paulo; 2005. Available from: http://www.teses.usp.br/teses/disponiveis/46/46133/tde-29102007-143925/ ;

Cranfield University

22. Kerssens, Marleen Maartje. Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy.

Degree: PhD, 2012, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/7924

► The accurate and safe diagnosis of breast cancer is a significant societal issue, with annual disease incidence of 48,000 women and around 370 men in… (more)

▼ The accurate and safe diagnosis of breast cancer is a significant societal issue, with annual disease incidence of 48,000 women and around 370 men in the UK. Early diagnosis of the disease allows more conservative treatments and better patient outcomes. Microcalcifications in breast tissue are an important indicator for breast cancers, and often the only sign of their presence. Several studies have suggested that the type of calcification formed may act as a marker for malignancy and its presence may be of biological significance. In this work, breast calcifications are studied with FTIR, synchrotron FTIR, ATR FTIR, and Raman mapping to explore their disease specific composition. From a comparison between vibrational spectroscopy and routine staining procedures it becomes clear that calcium builds up prior to calcification formation. Raman and FTIR indicate the same size for calcifications and are in agreement with routine staining techniques. From the synchrotron FTIR measurements it can be proven that amide is present in the centre of the calcifications and the intensity of the bands depends on the pathology. Special attention is paid to the type of carbonate substitution in the calcifications relating to different pathology grades. In contrast to mammography, Raman spectroscopy has the capability to distinguish calcifications based on their chemical composition. The ultimate goal is to turn the acquired knowledge from the mapping studies into a clinical tool based on deep Raman spectroscopy. Deep Raman techniques have a considerable potential to reduce large numbers of normal biopsies, reduce the time delay between screening and diagnosis and therefore diminish patient anxiety. In order to achieve this, a deep Raman system is designed and after evaluation of its performance tested on buried calcification standards in porcine soft tissue and human mammary tissue. It is shown that, when the calcification is probed through tissue, the strong 960 cm-1 phosphate band can be used as a pseudo marker for carbonate substitution which is related to the pathology of the surrounding tissue. Furthermore, the first study in which human breast calcifications are measured in bulk tissue with a thickness of several millimetres to centimetres is presented. To date, measurements have been performed at 41 specimens with a thickness up to 25 mm. Measurements could be performed through skin and blue dye. The proposed deep Raman technique is promising for probing of calcifications through tissue but will need refinement before being adopted in hospitals.

Subjects/Keywords: Breast cancer; apatite; FTIR (Fourier Transform InfraRed); synchrotron FTIR; ATR (attenuated total reflection); Raman mapping; deep Raman; Transmission Raman spectroscopy

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Kerssens, M. M. (2012). Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy. (Doctoral Dissertation). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/7924

Chicago Manual of Style (16^th Edition):

Kerssens, Marleen Maartje. “Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy.” 2012. Doctoral Dissertation, Cranfield University. Accessed June 19, 2019. http://dspace.lib.cranfield.ac.uk/handle/1826/7924.

MLA Handbook (7^th Edition):

Kerssens, Marleen Maartje. “Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy.” 2012. Web. 19 Jun 2019.

Vancouver:

Kerssens MM. Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy. [Internet] [Doctoral dissertation]. Cranfield University; 2012. [cited 2019 Jun 19]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/7924.

Council of Science Editors:

Kerssens MM. Study of calcification formation and disease diagnostics utilising advanced vibrational spectroscopy. [Doctoral Dissertation]. Cranfield University; 2012. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/7924

23. Predikaka, Darja. Sinteza in karakterizacija biooglja pridobljenega iz različnih vrst odpadne biomase s subkritično vodo.

Degree: 2016, Univerza v Mariboru

URL: https://dk.um.si/IzpisGradiva.php?id=60027 ; https://dk.um.si/Dokument.php?id=95624&dn= ; http://www.cobiss.si/scripts/cobiss?command=DISPLAY&base=cobib&rid=20303894&fmt=11

►

Namen magistrske naloge je sintetizirati in karakterizirati biooglje, ki smo ga dobili iz odpadne biomase s pomočjo subkritične vode. Sinteza biooglja je potekala v subkritični… (more)

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Namen magistrske naloge je sintetizirati in karakterizirati biooglje, ki smo ga dobili iz odpadne biomase s pomočjo subkritične vode. Sinteza biooglja je potekala v subkritični vodi z različnimi odpadnimi materiali in z dvema različnima plinoma za vzpostavitev atmosfere v reaktorju, N2 in CO2. Temperature sinteze pri tem nismo spreminjali in je vedno znašala 225 °C. Da bi ugotovili vpliv sušenja na lastnosti biooglja, smo uporabljali klasični termični postopek sušenja in metodo s superkritičnim CO2. Določili smo izkoristek sinteze biooglja različnih materialov in dobljenim vzorcem določili zeta potencial, z adsorpcijo dušika smo izmerili specifično površino, volumen in povprečni premer por. Vsem vzorcem smo posneli tudi FTIR spekter. Vse rezultate smo primerjali tudi z lastnostmi komercialno dosegljivega aktivnega oglja. Rezultati kažejo na najvišje izkoristke biooglja, ko smo za začetni material izbrali zmleto in z vodo predhodno ekstrahirano macesnovo skorjo. Pri teh pogojih smo dosegli 68,3 % izkoristek biooglja, ko smo uporabili dušik kot plin za vzpostavitev tlaka v sistemu, medtem ko smo pri vzorcu, ki je bil sintetiziran pri istih pogojih, a se je pri tem uporabil CO2, dobil produkt bolj enakomernejše oblike. Izkoristek biooglja pri uporabi CO2 kot plina za vzpostavitev tlaka v reaktorju je bil nekoliko nižji, in sicer 66,5 %. Rezultati merjenja zeta potenciala kažejo na to, da ima najnižji zeta potencial biooglje dobljeno iz mlete in v vodi predhodno ekstrahirane macesnove skorje, pri tlaku 215 bar, pri podaljšanem reakcijskem času tj. 6 h. Zeta potencial tega produkta znaša -34,33 mV. Največjo specifično površino vzorca smo dosegli pri biooglju macesnove skorje, ki je bil sušen s postopkom superkritičnega sušenja. Pri teh pogojih smo dobili specifično površino vzorca, ki je znašala 225,82 m2/g. Specifična površina aktivnega oglja je znašala 886,53 m2/g. FTIR spektri kažejo, da so si vzorci po sestavi med seboj zelo podobni in da je vpliv različnih plinov na površinske funkcionalne skupine majhen. Razlika se kaže le v prisotnosti O-H vezi, kar kaže na različno pripravo vzorcev.

The purpose of the master's thesis is to synthesize and characterize biochar, which was obtained from waste biomass using subcritical water. The synthesis of biochar was conducted insubcritical water with a variety of materials, using two different gases, namely N2 and CO2. The temperature of synthesis was not changed and was always set to 225 °C. In order to determine the influence of drying on the properties of biochar, the classical thermal air-drying method and the method with supercritical CO2 were used. The yield of biochar of different biowaste materials was determined and for the obtained products the zeta potential was measured. Furthermore, the specific surface area, average pore volume and diameter was determined using the nitrogen adsorption method. For all obtained biochar samples the FTIR spectra were measured. All obtained results were compared to the properties of commercially available activated carbon. Results…

Advisors/Committee Members: Škerget, Mojca.

Subjects/Keywords: Biooglje; subkritična voda; biomasa; hidrotermična karbonizacija; BET; zeta potencial; ATR – FTIR; Biochar; subcritical water; biomass; hydrothermal carbonization; BET; zeta potential; ATR – FTIR; info:eu-repo/classification/udc/661.183.2.091.3(043.2)

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Predikaka, D. (2016). Sinteza in karakterizacija biooglja pridobljenega iz različnih vrst odpadne biomase s subkritično vodo. (Masters Thesis). Univerza v Mariboru. Retrieved from https://dk.um.si/IzpisGradiva.php?id=60027 ; https://dk.um.si/Dokument.php?id=95624&dn= ; http://www.cobiss.si/scripts/cobiss?command=DISPLAY&base=cobib&rid=20303894&fmt=11

Chicago Manual of Style (16^th Edition):

Predikaka, Darja. “Sinteza in karakterizacija biooglja pridobljenega iz različnih vrst odpadne biomase s subkritično vodo.” 2016. Masters Thesis, Univerza v Mariboru. Accessed June 19, 2019. https://dk.um.si/IzpisGradiva.php?id=60027 ; https://dk.um.si/Dokument.php?id=95624&dn= ; http://www.cobiss.si/scripts/cobiss?command=DISPLAY&base=cobib&rid=20303894&fmt=11.

MLA Handbook (7^th Edition):

Predikaka, Darja. “Sinteza in karakterizacija biooglja pridobljenega iz različnih vrst odpadne biomase s subkritično vodo.” 2016. Web. 19 Jun 2019.

Vancouver:

Predikaka D. Sinteza in karakterizacija biooglja pridobljenega iz različnih vrst odpadne biomase s subkritično vodo. [Internet] [Masters thesis]. Univerza v Mariboru; 2016. [cited 2019 Jun 19]. Available from: https://dk.um.si/IzpisGradiva.php?id=60027 ; https://dk.um.si/Dokument.php?id=95624&dn= ; http://www.cobiss.si/scripts/cobiss?command=DISPLAY&base=cobib&rid=20303894&fmt=11.

Council of Science Editors:

Predikaka D. Sinteza in karakterizacija biooglja pridobljenega iz različnih vrst odpadne biomase s subkritično vodo. [Masters Thesis]. Univerza v Mariboru; 2016. Available from: https://dk.um.si/IzpisGradiva.php?id=60027 ; https://dk.um.si/Dokument.php?id=95624&dn= ; http://www.cobiss.si/scripts/cobiss?command=DISPLAY&base=cobib&rid=20303894&fmt=11

Université de Bordeaux I

24. Ta, Ha Phuong. Etude de la relation structure - toxicité des protéines amyloïdes en interaction avec des membranes modèles : Synthesis, structural analysis, and assembly of water soluble quinoline-based oligoamide foldamers.

Degree: Docteur es, Chimie-physique, 2011, Université de Bordeaux I

URL: http://www.theses.fr/2011BOR14361

►

Ce mémoire rapporte les études de protéines amyloïdes en interaction avec des membranes modèle afin d’établir une relation structure toxicité. Nous avons choisi différents modèles… (more)

▼

Ce mémoire rapporte les études de protéines amyloïdes en interaction avec des membranes modèle afin d’établir une relation structure toxicité. Nous avons choisi différents modèles membranaires (monocouches, bicouches) de composition lipidique et charges différentes et utilisé différentes méthodes physico-chimiques afin de caractériser les interactions des protéines amyloïdes avec les membranes.Nous avons montré l’importance de la contribution électrostatique dans les interactions de la protéine amyloïde HET-s (218-289) et ses mutants avec les membranes modèles.L’ellipsométrie a démontré que les mutants toxiques de HET-s (218-289) (M8, WT.Y1Y2V2) perturbentfortement les monocouches lipidiques à l’interface air-eau. La structure riche en feuillets β antiparallèles des protéines àl’interface air-eau et dans l’interaction avec les monocouches de lipides a été démontrée par la spectroscopie PMIRRAS (Polarization Modulation – Infrared Reflection Absorption Spectroscopy). Nous avons établie que l’interface air-eau peut modifier l’agrégation des protéines amyloïdes. A l’aide de la spectroscopie de fluorescence, la spectroscopie PWR (Plasmon-Waveguided Resonance) et la spectroscopie ATR-FTIR (Attenuated Total Reflection – Fourier Transform Infrared), nous avons mis en évidence que la protéine toxique M8 adopte une structure riche en feuillets β antiparallèles en altérant fortement l’intégrité des bicouches lipidiques. Au contraire, la protéine non toxique WT se structure en feuillets β parallèles dans ces interactions et elle ne perturbe pas l’homogénéité des membranes. La toxicité de la protéine M8 semble liée à son organisation différente et à sa capacité à réorganiser les membranes.Nos résultats confortent également l’hypothèse de la toxicité des oligomères amyloïdes.Une étude sur la fabrication d’une cellule microfluidique pour la séparation de différents types d’autoassemblage afin de les détecter et de les étudier en interaction avec des liposomes par spectroscopie infrarouge est présentée. Une cellule microfluidique de CaF2 de 8 μm d’épaisseur de canaux est obtenue et est utilisée pour la détection d’une protéine de test.

This manuscript reports the studies of amyloid proteins in interaction with membrane models in order to establish their structure-toxicity relationship.Membrane models (monolayer, bilayer) of different charge and lipid composition were used. We used various physico chemical methods to characterize the interaction of these amyloid proteins with membranes.We showed the importance of the electrostatic contribution in the interactions of the amyloid protein HET-s(218-289) and its mutants with model membranes.Ellipsometry showed that the toxic mutants of HET-s (218-289) (M8, WT.Y1Y2V2) strongly disturbed thelipid monolayers at the air-water interface. The structure rich in antiparallel β sheets of auto-assembled proteins at theair-water interface and in interaction with lipid monolayers at the air-water interface has been demonstrated by the PMIRRAS spectroscopy (Polarization Modulation - Infrared…

Advisors/Committee Members: Lecomte, Sophie (thesis director), Servant, Laurent (thesis director), Guirardel, Matthieu (thesis director).

Subjects/Keywords: Amyloïde; Prion; HET-s (218-289); Ellipsométrie; Tensiométrie; PM-IRRAS; ATR-FTIR; PWR; Amyloid; Prion; HET-s (218-289); Ellipsometry; Tensiometry; PM-IRRAS; ATR-FTIR; PWR

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ta, H. P. (2011). Etude de la relation structure - toxicité des protéines amyloïdes en interaction avec des membranes modèles : Synthesis, structural analysis, and assembly of water soluble quinoline-based oligoamide foldamers. (Doctoral Dissertation). Université de Bordeaux I. Retrieved from http://www.theses.fr/2011BOR14361

Chicago Manual of Style (16^th Edition):

Ta, Ha Phuong. “Etude de la relation structure - toxicité des protéines amyloïdes en interaction avec des membranes modèles : Synthesis, structural analysis, and assembly of water soluble quinoline-based oligoamide foldamers.” 2011. Doctoral Dissertation, Université de Bordeaux I. Accessed June 19, 2019. http://www.theses.fr/2011BOR14361.

MLA Handbook (7^th Edition):

Ta, Ha Phuong. “Etude de la relation structure - toxicité des protéines amyloïdes en interaction avec des membranes modèles : Synthesis, structural analysis, and assembly of water soluble quinoline-based oligoamide foldamers.” 2011. Web. 19 Jun 2019.

Vancouver:

Ta HP. Etude de la relation structure - toxicité des protéines amyloïdes en interaction avec des membranes modèles : Synthesis, structural analysis, and assembly of water soluble quinoline-based oligoamide foldamers. [Internet] [Doctoral dissertation]. Université de Bordeaux I; 2011. [cited 2019 Jun 19]. Available from: http://www.theses.fr/2011BOR14361.

Council of Science Editors:

Ta HP. Etude de la relation structure - toxicité des protéines amyloïdes en interaction avec des membranes modèles : Synthesis, structural analysis, and assembly of water soluble quinoline-based oligoamide foldamers. [Doctoral Dissertation]. Université de Bordeaux I; 2011. Available from: http://www.theses.fr/2011BOR14361

Université de Lorraine

25. Jamal, Dima. Influence de stress environnementaux sur les propriétés physicochimiques de jeunes biofilms en cours de formation : étude par spectroscopies vibrationnelles infrarouge-Raman et de force AFM : Influence of environmental stresses on the physico-chemical properties of nascent biofilms during their formation : a vibrational (infrared and Raman) and force (AFM) spectroscopies study.

Degree: Docteur es, Chimie, 2015, Université de Lorraine

URL: http://www.theses.fr/2015LORR0075

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Les biofilms sont des communautés complexes de microorganismes, enchassées dans une matrice auto-secrétée de substances polymériques extracellulaires ou EPS. Les biofilms se forment à la… (more)

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Les biofilms sont des communautés complexes de microorganismes, enchassées dans une matrice auto-secrétée de substances polymériques extracellulaires ou EPS. Les biofilms se forment à la surface de la plupart des matériaux, qu’ils soient de nature biologique ou non, et sont à l’origine de divers problèmes économiques et sanitaires. Les bactéries dans un biofilm, dites bactéries sessiles, présentent en effet des propriétés phénotypiques qui les distinguent de leurs homologues planctoniques, notamment par une résistance accrue aux antibiotiques et aux traitements de désinfection. D’où, la nécessité de prévenir leur formation et/ ou de leur élimination à partir de stratégies mieux adaptées à ce mode de vie en communauté. Le développement de telles stratégies passe entre autre par une meilleure connaissance des contributions physico-chimiques gouvernant les interactions de ces microorganismes avec leur environnement proche notamment lors des étapes initiales de la formation des biofilms. Deux grands objectifs ont été fixés au début de cette thèse, le premier visant à caractériser, in situ et en temps réel la formation de jeunes biofilms de deux modèles bactériens : une souche naturelle et ubiquitaire de Pseudomonas fluorescens et une souche modèle d’Escherichia coli obtenue par génie génétique pour surexprimer un seul type d’EPS. Le deuxième objectif de cette thèse, consiste à étudier leurs réponses à un stress environnemental ou chimique, notamment quand les biofilms doivent se développer dans des conditions extrêmes de pH. Pour atteindre ces objectifs, différentes techniques ont été combinées pour étudier de l’échelle moléculaire à l’échelle cellulaire le développement des biofilms. La spectroscopie Infrarouge à Transformée de Fourier en mode réflexion totale atténuée (FTIR-ATR) a été utilisée pour suivre en temps réel le développement des biofilms. Nous avons pu suivre l’évolution des empreintes spectrales IR-ATR au cours de la formation des biofilms, sous des conditions favorables ou non à leur croissance. De jeunes biofilms de 24 h ont été étudiés par microspectroscopie Raman confocale (MRC), celle ci permettant d’obtenir des informations localisées sur la composition chimique des biofilms. La structure générale des biofilms a été visualisée par la microscopie à épifluorescence. Finalement, les propriétés physico-chimiques des EPS ont été quantifiées par spectroscopie de force atomique à l’échelle de la molécule unique (SMFS pour Single Molecule Force Spectroscopy).

Biofilms are complex communities of microorganisms, embedded in an auto-produced matrix of extracellular polymeric substances or EPS. Biofilms form on the surface of most materials, whether or not they are of biological nature, and cause major economic problems as well as public health concerns. Bacteria within a biofilm also called sessile bacteria, have phenotypic characteristics that distinguish them from their planktonic counterparts, rendering them more resistant to antibiotics and to disinfection strategies. Hence, the prevention of their…

Advisors/Committee Members: Humbert, François (thesis director), Francius, Grégory (thesis director).

Subjects/Keywords: Biofilms; EPS; Stress environnemental; FTIR-ATR; Microspectroscopie Raman confocale; AFM; SMFS; Biofilms; EPS; Environmental stress; FTIR-ATR; Confocal Raman microspectroscopy; AFM; SMFS; 572.36; 579.17

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

APA (6^th Edition):

Jamal, D. (2015). Influence de stress environnementaux sur les propriétés physicochimiques de jeunes biofilms en cours de formation : étude par spectroscopies vibrationnelles infrarouge-Raman et de force AFM : Influence of environmental stresses on the physico-chemical properties of nascent biofilms during their formation : a vibrational (infrared and Raman) and force (AFM) spectroscopies study. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2015LORR0075

Chicago Manual of Style (16^th Edition):

Jamal, Dima. “Influence de stress environnementaux sur les propriétés physicochimiques de jeunes biofilms en cours de formation : étude par spectroscopies vibrationnelles infrarouge-Raman et de force AFM : Influence of environmental stresses on the physico-chemical properties of nascent biofilms during their formation : a vibrational (infrared and Raman) and force (AFM) spectroscopies study.” 2015. Doctoral Dissertation, Université de Lorraine. Accessed June 19, 2019. http://www.theses.fr/2015LORR0075.

MLA Handbook (7^th Edition):

Jamal, Dima. “Influence de stress environnementaux sur les propriétés physicochimiques de jeunes biofilms en cours de formation : étude par spectroscopies vibrationnelles infrarouge-Raman et de force AFM : Influence of environmental stresses on the physico-chemical properties of nascent biofilms during their formation : a vibrational (infrared and Raman) and force (AFM) spectroscopies study.” 2015. Web. 19 Jun 2019.

Vancouver:

Jamal D. Influence de stress environnementaux sur les propriétés physicochimiques de jeunes biofilms en cours de formation : étude par spectroscopies vibrationnelles infrarouge-Raman et de force AFM : Influence of environmental stresses on the physico-chemical properties of nascent biofilms during their formation : a vibrational (infrared and Raman) and force (AFM) spectroscopies study. [Internet] [Doctoral dissertation]. Université de Lorraine; 2015. [cited 2019 Jun 19]. Available from: http://www.theses.fr/2015LORR0075.

Council of Science Editors:

Jamal D. Influence de stress environnementaux sur les propriétés physicochimiques de jeunes biofilms en cours de formation : étude par spectroscopies vibrationnelles infrarouge-Raman et de force AFM : Influence of environmental stresses on the physico-chemical properties of nascent biofilms during their formation : a vibrational (infrared and Raman) and force (AFM) spectroscopies study. [Doctoral Dissertation]. Université de Lorraine; 2015. Available from: http://www.theses.fr/2015LORR0075

Brno University of Technology

26. Kostková, Jana. Porovnání vlastností dvou výrobků pro umělá kluziště na bázi kaučuku etylén-propylen-dien .

Degree: 2015, Brno University of Technology

URL: http://hdl.handle.net/11012/30949

► Diplomová práce se zabývá charakterizací dvou černobílých výrobků na bázi etylen-propylen-dienového kaučuku (EPDM) používaných jako podklad pro umělá kluziště. Výrobky označené A a B se… (more)

▼ Diplomová práce se zabývá charakterizací dvou černobílých výrobků na bázi etylen-propylen-dienového kaučuku (EPDM) používaných jako podklad pro umělá kluziště. Výrobky označené A a B se liší průměrem kruhových trubek, kterými prochází chladicí kapalina a také vzdáleností těchto trubek. Oba materiály byly charakterizovány s cílem zjistit, zda se jedná o EPDM a v čem se oba materiály kromě rozměrů liší. K charakterizaci byly použité tyto metody: diferenční kompenzační kalorimetrie, termogravimetrická analýza, infračervená spektroskopie s Fourierovou transformací v módu úplného odrazu, tahový test, test botnání a test termo-oxidační stability. Složení obou materiálů včetně plniv a dalších aditiv je téměř stejné, odlišná je však struktura EPDM a velmi pravděpodobně také interakce s plnivy, což se projevuje odlišnými mechanickými vlastnostmi, ale také termooxidační stabilitou a tepelnou kapacitou. Zjištěné rozdíly jsou zásadní pro dlouhodobé užitné vlastnosti obou materiálů.; This master thesis deals with characterization of two black and white products based on ethylene-propylene-diene rubber (EPDM) used for skating rink. Products marked with A and are different in their diameter of circular tubes trough which cooling medium passes and also in the distance of these tubes. Both of materials were characterized in order to determine whether it is the EPDM and how are they different. The characterization methods were used: differential scanning calorimetry, thermogravimetric analysis, attenuated total reflectance Fourier transform infrared spectroscopy, tensile test, swelling test, thermooxidative test. The composition of both materials, including fillers and others additives is almost the same but difference is in structure of EPDM and probably also in interaction with fillers, what exhibits different mechanical properties, thermooxidative stability and thermal capacity. These differences which have been found are essential for long-term use properties of both materials. Advisors/Committee Members: Bálková, Radka (advisor).

Subjects/Keywords: EPDM; TGA; DSC; EDS; ATR-FTIR; tahový test; termooxidační test; tepelná kapacita; test botnání; EPDM; TGA; DSC; EDS; ATR-FTIR; tensile test; thermooxidative stability; heat capacity; the swelling test

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

APA (6^th Edition):

Kostková, J. (2015). Porovnání vlastností dvou výrobků pro umělá kluziště na bázi kaučuku etylén-propylen-dien . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/30949

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):

Kostková, Jana. “Porovnání vlastností dvou výrobků pro umělá kluziště na bázi kaučuku etylén-propylen-dien .” 2015. Thesis, Brno University of Technology. Accessed June 19, 2019. http://hdl.handle.net/11012/30949.

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

MLA Handbook (7^th Edition):

Kostková, Jana. “Porovnání vlastností dvou výrobků pro umělá kluziště na bázi kaučuku etylén-propylen-dien .” 2015. Web. 19 Jun 2019.

Vancouver:

Kostková J. Porovnání vlastností dvou výrobků pro umělá kluziště na bázi kaučuku etylén-propylen-dien . [Internet] [Thesis]. Brno University of Technology; 2015. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/11012/30949.

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

Council of Science Editors:

Kostková J. Porovnání vlastností dvou výrobků pro umělá kluziště na bázi kaučuku etylén-propylen-dien . [Thesis]. Brno University of Technology; 2015. Available from: http://hdl.handle.net/11012/30949

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

27. Silva, Elen Almeida Leal da. Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol.

Degree: 2016, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/135435

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As células a combustível de etanol direto (DEFCs, Direct Ethanol Fuel Cells) são baseadas na eletro-oxidação do etanol à baixa temperatura e necessitam catalisadores à… (more)

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As células a combustível de etanol direto (DEFCs, Direct Ethanol Fuel Cells) são baseadas na eletro-oxidação do etanol à baixa temperatura e necessitam catalisadores à base de metais nobres, devido à cinética mais lenta para as reações de oxi-redução. Entre os catalisadores, a platina e as ligas de platina são os mais utilizados. Materiais para suportar os catalisadores são necessários a fim de reduzir a carga do mesmo empregada. Um dos suportes de catalisadores mais versáteis é o carvão ativado, e um dos mais utilizados tem sido o carvão mineral Vulcan. Recentemente, estudos têm sido realizados sobre a madeira como material precursor de carvão ativado, devido à sua sustentabilidade e também porque os materiais carbonosos obtidos têm excelentes propriedades finais. No presente trabalho, estudou-se a reação de eletro-oxidação do etanol, de catalisadores à base de Pt e PtSn suportados em biocarvões obtidos a partir da madeira Eucalyptus grandis. No início desse trabalho não havia relatos na literatura sobre o uso de carvões ativados obtidos a partir de madeira de Eucalyptus grandis como precursor. Foram utilizados dois métodos de ativação nos suportes, ativação física com CO2 e ativação química com ZnCl2. Os suportes de catalisadores foram caracterizados por análise textural, análise elementar, análise termogravimétrica e por espectroscopia de infravermelho. As técnicas empregadas para a caracterização dos catalisadores foram espectrometria de retroespalhamento de Rutherford (RBS), difração de raios-X (DRX), análise termogravimétrica (TGA), microscopia eletrônica de transmissão (MET), voltametria cíclica (VC) e caracterização espectroeletroquímica (ATR-FTIR in-situ). Os biocarvões apresentaram áreas superficiais maiores e tamanhos de poros menores do que o carvão Vulcan, independente do tratamento. A natureza do suporte influenciou nas características morfológicas dos eletrocatalisadores preparados. Com base nos resultados obtidos os catalisadores suportados nos suportes com ativação química apresentaram os melhores resultados de densidade de corrente para eletro-oxidação do etanol, com exceção do catalisador PtSn suportado no biocarvão ativado fisicamente (PtSn/BCAF). Pode-se dizer que os biocarvões são adequados para aplicações em células de combustível, podendo substituir o uso de suportes baseados em carvões minerais. A eletro-oxidação do etanol nos eletrocataliadores de PtSn nos carvões ativados ocorre principalmente através da produção de acetaldeído e ácido acético.

Direct ethanol fuel cells (DEFC) are based on ethanol electrooxidation at low-temperature and they require noble metal based catalysts, due to the slower kinetic of redox reactions. Among the catalysts, platinum and its alloys have been the most widely used. Catalysts support materials have been employed with the intent to reduce loading catalyst. One of the most versatile catalyst supports is activated carbon, and one of the most widely used is the Vulcan®, a mineral carbon. Currently, different studies have been conducted concerning wood as…

Advisors/Committee Members: Malfatti, Célia de Fraga.

Subjects/Keywords: Eletrooxidação; PtSn; Biocarbon; Etanol; Platina; Ethanol electro-oxidation; Estanho; ATR-FTIR in situ; Carvão

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

APA (6^th Edition):

Silva, E. A. L. d. (2016). Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/135435

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):

Silva, Elen Almeida Leal da. “Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol.” 2016. Thesis, Universidade do Rio Grande do Sul. Accessed June 19, 2019. http://hdl.handle.net/10183/135435.

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

MLA Handbook (7^th Edition):

Silva, Elen Almeida Leal da. “Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol.” 2016. Web. 19 Jun 2019.

Vancouver:

Silva EALd. Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2016. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/10183/135435.

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

Council of Science Editors:

Silva EALd. Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol. [Thesis]. Universidade do Rio Grande do Sul; 2016. Available from: http://hdl.handle.net/10183/135435

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

KTH

28. Toll, Nils. Studie om åldring av färgfilm med FTIR-ATR och SEM.

Degree: Biotechnology and Health (CBH), 2018, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231529

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FTIR-ATR och SEM användes för att analysera olika typer av ytbehandlingar då de utsatts för accelererad åldring. Ytbehandlingarna som analyserats var olika typer av… (more)

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FTIR-ATR och SEM användes för att analysera olika typer av ytbehandlingar då de utsatts för accelererad åldring. Ytbehandlingarna som analyserats var olika typer av akrylatemulsioner, en UV-härdande produkt, en syrahärdande produkt och en vattenburen UV-härdande produkt. Två olika metoder för att kvantifiera degraderingen av färgfilmerna undersöktes, POI-metoden och karbonylindex. Båda dessa metoder går ut på att jämföra antingen arean eller höjden av två FTIR toppar med varandra. Studien avslutades med en topografisk analys av proverna mha SEM. FTIR-ATR visade sig vara ett effektivt instrument för att undersöka degraderingen av färgfilmer. POI-metoden användes för att kvantifiera 9 av 12 ytbehandlingar och ranka Serwin Williams produkter från bäst till sämst utomhusbeständighet. De ytbehandlingar som uppvisade störst kemiska förändringar hade alla aromat komponenter. Dessa absorberar UV-ljus och påverkas därför extra mycket av fotooxidation. De ytbehandlingar som avvek från de resterande var klarlacker och den vattenburna UV-härdande färgen. Klarlackerna visade minimala kemiska förändringar och den UV-härdande produkten minskade i POI, olikt resterande ytbehandlingar. Karbonylindex visade sig inte vara en effektiv metod för att bedöma degradering av färgfilmerna då värdet ökade för två av produkterna som testades och minskade för de två andra. Karbonyltoppen vid 1720cm^-1 kan dock analyseras utan att beräkna karbonylindex då den kan ge mycket intressant information om den förändrande karbonylkompositionen. Testerna av topografin med SEM visade mycket detaljerade bilder av degradering processen som föll i linje med resultaten från FTIR analysen.

FTIR-ATR and SEM were used to analyze different types of coatings exposed to accelerated ageing. The coatings valuated in this study were different types waterborne acrylic emulsions, a UV-curing coating, an acid curing coating and a waterborne UV-curing coating. Two different ways to quantify the degradation with FTIR-ATR were explored, the POI method and carbonyl index. Both methods are based on comparing the height/area of specific FTIR peaks with one another. The study was concluded with a topographic analysis with SEM for some of the samples. Results from this study shows that FTIR-ATR is an effective tool to explore the degradation of different types of coatings. The POI method was successfully used to quantify the degradation concerning 9 of the 12 studied coatings and ranking the coatings from best to worst. Coatings with aromatic components mounted the biggest chemical changes thanks to their instability when exposed to UV-radiation. Coatings that deviated from the rest were acrylic clearcoats and the waterborne UV-curing coating. Clearcoats mounted minimal chemical changes in the FTIR-ATR, and the waterborne UV-curing coating was degraded in a way that it’s POI value decreased during ageing, unlike all other coatings tested. Carbonyl index proved insufficient for quantifying degradation in this study, although the carbonyl peak around 1720…

Subjects/Keywords: FTIR-ATR; SEM; polymer; bindemedel; accelererad åldring av färgfilm; hydrolys; fotoinitierade oxidation; Chemical Engineering; Kemiteknik

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

APA (6^th Edition):

Toll, N. (2018). Studie om åldring av färgfilm med FTIR-ATR och SEM. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231529

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):

Toll, Nils. “Studie om åldring av färgfilm med FTIR-ATR och SEM.” 2018. Thesis, KTH. Accessed June 19, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231529.

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

MLA Handbook (7^th Edition):

Toll, Nils. “Studie om åldring av färgfilm med FTIR-ATR och SEM.” 2018. Web. 19 Jun 2019.

Vancouver:

Toll N. Studie om åldring av färgfilm med FTIR-ATR och SEM. [Internet] [Thesis]. KTH; 2018. [cited 2019 Jun 19]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231529.

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

Council of Science Editors:

Toll N. Studie om åldring av färgfilm med FTIR-ATR och SEM. [Thesis]. KTH; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231529

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

Penn State University

29. Bazilevskaya, Ekaterina. IRON AND ALUMINUM HYDROXIDE NANOPARTICLES IN THE ENVIRONMENT: FROM NANO-SCALE TO THE FIELD PROCESSES.

Degree: PhD, Soil Science, 2009, Penn State University

URL: https://etda.libraries.psu.edu/catalog/10329

► The objective of this doctoral research was to increase scientific understanding of the behavior of Fe and Al hydroxide nanoparticles in soils. These particles are… (more)

▼ The objective of this doctoral research was to increase scientific understanding of the behavior of Fe and Al hydroxide nanoparticles in soils. These particles are of great environmental importance due to their ability to retain and transport nutrients and contaminants. Three studies were undertaken at different scales, which are documented in three manuscripts included in this dissertation The first study examined the rate constants for goethite (á-FeOOH) crystallization from nano-particulate Fe hydroxide suspensions in the absence (0% Al) and presence (2% Al) of aluminum. One of the merits of this study was the application of a multivariate curve resolution analysis (MCR) of infrared spectra to environmentally important mixed Fe-Al hydroxide colloids in order to quantify goethite content in poorly-crystalline mixtures. Obtained rate constants were found to be equal to (7.64±0.67)*10-7 s-1 for 0% Al and (4.5±0.21)*10-7 s-1 for 2% Al hydroxides. Dissolution-precipitation mechanism was dominant in the process of goethite transformation to ferrihydrite. Further growth of goethite crystals took place either by aggregation mechanism to form polycrystalline agglomerates or alternatively by Oswald ripening to form large single crystals. The presence of aqueous Al species „poisoned“ goethite’s surface by disrupting the formation of hydrogen bonds thus increasing the number of non-stoichiometric hydroxyls. The second study addressed changes of mineral composition in mixed Fe-Al hydroxide nanoparticles as a function of Al-substitution and reaction time. It was found that low Al concentrations (2-8 mol. %) lead to formation of moderately crystalline Al-goethite upon ageing, while at medium Al concentrations (10-20%) colloidal suspensions remained stable for the duration of the whole experiment (54 days), goethite formation was completely retarded, and less crystalline intermediate structure were formed. At 25% Al substitution, gibbsite Al(OH)3 microcrystalline structures appeared within the first days of experiment. In addition, to understand the mechanism of Al substitution in goethite, we explored the most energetically favorable arrangement of Al atoms within goethite by ab initio periodic density functional theory (DFT) calculations. These calculations showed that Al may form Al-O-Al clusters as opposed to evenly distributed isolated Al atoms (Al-O-Fe) in goethite structure. The third study was conducted to investigate the relative importance of Fe and Al hydroxide nanoparticles in migration and accumulation of these elements in soils. I approached this goal by studying soil water and coatings on mineral grains from Spodosol soil, which is characterized by intensive leaching of Fe, Al, and organic matter (OM) and their accumulation in Spodosol profile. While Fe, Al and Si were mostly transported as inorganic colloids, Al also showed close association with organic matter. Fe, Al, and Si have the highest mobility in organic-rich A and Bh horizons of the spodosol profile, which suggests that the presence of organic matter…

Subjects/Keywords: nanoparticles; iron and aluminum hydroxides; rate constants of goethite crystallization; ATR-FTIR; Spodosols; colloidal transport

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

APA (6^th Edition):

Bazilevskaya, E. (2009). IRON AND ALUMINUM HYDROXIDE NANOPARTICLES IN THE ENVIRONMENT: FROM NANO-SCALE TO THE FIELD PROCESSES. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10329

Chicago Manual of Style (16^th Edition):

Bazilevskaya, Ekaterina. “IRON AND ALUMINUM HYDROXIDE NANOPARTICLES IN THE ENVIRONMENT: FROM NANO-SCALE TO THE FIELD PROCESSES.” 2009. Doctoral Dissertation, Penn State University. Accessed June 19, 2019. https://etda.libraries.psu.edu/catalog/10329.

MLA Handbook (7^th Edition):

Bazilevskaya, Ekaterina. “IRON AND ALUMINUM HYDROXIDE NANOPARTICLES IN THE ENVIRONMENT: FROM NANO-SCALE TO THE FIELD PROCESSES.” 2009. Web. 19 Jun 2019.

Vancouver:

Bazilevskaya E. IRON AND ALUMINUM HYDROXIDE NANOPARTICLES IN THE ENVIRONMENT: FROM NANO-SCALE TO THE FIELD PROCESSES. [Internet] [Doctoral dissertation]. Penn State University; 2009. [cited 2019 Jun 19]. Available from: https://etda.libraries.psu.edu/catalog/10329.

Council of Science Editors:

Bazilevskaya E. IRON AND ALUMINUM HYDROXIDE NANOPARTICLES IN THE ENVIRONMENT: FROM NANO-SCALE TO THE FIELD PROCESSES. [Doctoral Dissertation]. Penn State University; 2009. Available from: https://etda.libraries.psu.edu/catalog/10329

University of California – Irvine

30. MacMillan, Amanda C. Uptake of Water and Other Molecules by Aerosolized Nanoparticles.

Degree: Chemistry, 2015, University of California – Irvine

URL: http://www.escholarship.org/uc/item/6w73043r

► The fundamental properties of 1-n-alkyl-3-methylimidazolium ([CnMIM+], n = number of carbons on the linear alkyl chain)-based ionic liquids (ILs) are not fully characterized, including quantification… (more)

▼ The fundamental properties of 1-n-alkyl-3-methylimidazolium ([CnMIM+], n = number of carbons on the linear alkyl chain)-based ionic liquids (ILs) are not fully characterized, including quantification of the amount of water or carbon dioxide (CO2) absorbed from the atmosphere and the nature of the IL‒water or IL‒CO2 interactions. For example, interactions of bulk ILs and water in previous studies were limited by slow equilibration times of the ILs when exposed to water vapor. This is the first study of the interaction of water or CO2 with aerosolized IL nanoparticles. The particles’ small size ensures IL‒water vapor equilibrium is achieved quickly. Additionally, ILs may have the ability to absorb large amounts of CO2 and can be used for CO2 sequestration in the environment. The combined experimental and theoretical techniques of tandem nano-differential mobility analysis (TDMA), attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy, and molecular dynamics (MD) simulations were used to provide a comprehensive picture of the behavior of absorbed water or CO2 in IL nanoparticles and thin films. [CnMIM]+ (n = 2, 4, or 6) paired with Cl‒ or BF4‒ were studied to examine the effect of alkyl chain length on IL hygroscopicity and CO2 uptake. Particles' growth from water or CO2 uptake was quantified using TDMA. For the hygroscopicity studies, growth curves show steady uptake of water vapor with increasing relative humidity. Water molar fractions (χw) agreed well with those estimated from ATR-FTIR data. Additionally, the performance of several liquid activity coefficient models were evaluated by fits to the experimental data. MD simulations, used to model IL−water interactions, revealed considerably stronger interactions between Cl− and water compared to BF4− and water. The increase in growth factor after CO2 exposure showed little change for the IL studied. These combined experimental, theoretical, and modeling techniques help provide a more complete picture for these two families of ILs in the presence of water or CO2. The techniques also provide a quantitative parameterization of the amount of water vapor that ILs with different alkyl chain lengths can absorb under equilibrium conditions.The use of ILs as suitable seed particles for secondary organic formation and growth from α-pinene ozonolysis in an environmental smog chamber was also explored. Additionally, we investigated the sensitivity of the nanoparticles’ chemical composition to varying operation conditions in electrospray aerosol generators.

Subjects/Keywords: Chemistry; Atmospheric chemistry; aerosol; ATR-FTIR; hygroscopicity; ionic liquids; nanoparticles; water vapor

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APA (6^th Edition):

MacMillan, A. C. (2015). Uptake of Water and Other Molecules by Aerosolized Nanoparticles. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/6w73043r

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):

MacMillan, Amanda C. “Uptake of Water and Other Molecules by Aerosolized Nanoparticles.” 2015. Thesis, University of California – Irvine. Accessed June 19, 2019. http://www.escholarship.org/uc/item/6w73043r.

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

MLA Handbook (7^th Edition):

MacMillan, Amanda C. “Uptake of Water and Other Molecules by Aerosolized Nanoparticles.” 2015. Web. 19 Jun 2019.

Vancouver:

MacMillan AC. Uptake of Water and Other Molecules by Aerosolized Nanoparticles. [Internet] [Thesis]. University of California – Irvine; 2015. [cited 2019 Jun 19]. Available from: http://www.escholarship.org/uc/item/6w73043r.

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

Council of Science Editors:

MacMillan AC. Uptake of Water and Other Molecules by Aerosolized Nanoparticles. [Thesis]. University of California – Irvine; 2015. Available from: http://www.escholarship.org/uc/item/6w73043r

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

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