subject:(XRF)

Universiteit Utrecht

1. Harthoorn, J.L. Onderzoek van tekenmaterialen met technische middelen. Een literatuurstudie aangevuld met technisch onderzoek van tekeningen uit het Leidse Prentenkabinet.

Degree: 2013, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/277859

► In deze studie wordt nagegaan welke informatie kan worden verkregen door technische onderzoeksmethodes toe te passen op tekeningen. De aandacht is daarbij gericht op tekenmaterialen… (more)

Subjects/Keywords: tekeningen; tekenmateriaal; technisch onderzoek; XRF

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Harthoorn, J. L. (2013). Onderzoek van tekenmaterialen met technische middelen. Een literatuurstudie aangevuld met technisch onderzoek van tekeningen uit het Leidse Prentenkabinet. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/277859

Chicago Manual of Style (16^th Edition):

Harthoorn, J L. “Onderzoek van tekenmaterialen met technische middelen. Een literatuurstudie aangevuld met technisch onderzoek van tekeningen uit het Leidse Prentenkabinet.” 2013. Masters Thesis, Universiteit Utrecht. Accessed March 07, 2021. http://dspace.library.uu.nl:8080/handle/1874/277859.

MLA Handbook (7^th Edition):

Harthoorn, J L. “Onderzoek van tekenmaterialen met technische middelen. Een literatuurstudie aangevuld met technisch onderzoek van tekeningen uit het Leidse Prentenkabinet.” 2013. Web. 07 Mar 2021.

Vancouver:

Harthoorn JL. Onderzoek van tekenmaterialen met technische middelen. Een literatuurstudie aangevuld met technisch onderzoek van tekeningen uit het Leidse Prentenkabinet. [Internet] [Masters thesis]. Universiteit Utrecht; 2013. [cited 2021 Mar 07]. Available from: http://dspace.library.uu.nl:8080/handle/1874/277859.

Council of Science Editors:

Harthoorn JL. Onderzoek van tekenmaterialen met technische middelen. Een literatuurstudie aangevuld met technisch onderzoek van tekeningen uit het Leidse Prentenkabinet. [Masters Thesis]. Universiteit Utrecht; 2013. Available from: http://dspace.library.uu.nl:8080/handle/1874/277859

Delft University of Technology

2. Allred, Jennie (author). Characterization of Hidden Paint Layer Topography Using a Stereographic XRF Approach.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:e075771f-a53f-4790-8bdc-673381e7664f

►

Scientific investigation of paintings has been facilitated by the development of advanced non-de\-struc\-tive imaging methods. Characterization of painting stratigraphy traditionally requires extraction of small… (more)

Subjects/Keywords: XRF; hidden paint layers; paintings

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Allred, J. (. (2017). Characterization of Hidden Paint Layer Topography Using a Stereographic XRF Approach. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:e075771f-a53f-4790-8bdc-673381e7664f

Chicago Manual of Style (16^th Edition):

Allred, Jennie (author). “Characterization of Hidden Paint Layer Topography Using a Stereographic XRF Approach.” 2017. Masters Thesis, Delft University of Technology. Accessed March 07, 2021. http://resolver.tudelft.nl/uuid:e075771f-a53f-4790-8bdc-673381e7664f.

MLA Handbook (7^th Edition):

Allred, Jennie (author). “Characterization of Hidden Paint Layer Topography Using a Stereographic XRF Approach.” 2017. Web. 07 Mar 2021.

Vancouver:

Allred J(. Characterization of Hidden Paint Layer Topography Using a Stereographic XRF Approach. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Mar 07]. Available from: http://resolver.tudelft.nl/uuid:e075771f-a53f-4790-8bdc-673381e7664f.

Council of Science Editors:

Allred J(. Characterization of Hidden Paint Layer Topography Using a Stereographic XRF Approach. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:e075771f-a53f-4790-8bdc-673381e7664f

Delft University of Technology

3. Carlier, L.C.F. (author). Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:9f70672e-3161-40a9-ac86-e9430cf85548

► Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname. IAMGold operates Rosebel N.V. Gold Mines in Suriname, South America. The producing… (more)

▼ Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname. IAMGold operates Rosebel N.V. Gold Mines in Suriname, South America. The producing deposits are characterized to be Archaen greenstone hosted quartz-carbonate vein deposits. Regional exploration projects are located in rainforest environment. Geologists are therefore confronted with difficult access, few outcrops and deep weathering. Efficient exploration is crucial and for this reason a profound understanding of the local geology, gold depositional mechanism and signature is required. There is a hypothesis that a temperature gradient resulting from the flow of hydrothermal fluids through the shear and tension veins will have caused alteration halos to be formed around the gold deposit. Specific element enrichment and depletion are also expected near the gold deposition as a result of changing pressure/temperature regime and fluid characteristics. Recognizing and understanding alteration halos will increase the target area in an exploration campaign. To test this hypothesis 28 boreholes with a maximum downhole depth of 230 meters were sampled across the producing Koolhoven pit on the Rosebel concession. 85 Samples were analysed for trace element and major element content in a laboratory. 904 Samples were analysed using an X-50 Mobile XRF device for element content. 1573 Spectral measurements were obtained using a Hi-Res Terraspec and 40 thin sections were analysed using a conventional polarization microscope and electron microprobe. The petrographic analysis reveals the presence of quartz, carbonate, chlorite, pyrite, chalcopyrite, magnetite, hematite, rutile, clay mineral and feldspar including plagioclase. Bleached veins selvages are associated with high concentrations of carbonate and sericite, pyrite porphyroblasts and are devoid of chlorite. The sulfide mineral content does not exceed 5%. The conglomerate clasts are identified to be of volcanic origin mainly, hereby supporting the major element results. The veins contain quartz, carbonate, chlorite and the accessory minerals white-mica and tourmaline. Due to the low degree of deformation the veins are concluded to be of late timing compared to the main deformation. The use of major element analysis has resulted in the effective differentiation of lithologies present in the Koolhoven pit. Siltstone/mudstone, two types of greywacke (A and B), sandstone, conglomerate and volcanic rock ranging from mafic to felsic have been recognized. Greywacke B and conglomerate are spatially related and their major-element content resembles that of the volcanic rock. The use of log-ratios to analyse the trace element data suggests the presence of correlations between specific element ratios and gold concentrations. The best results were obtained by analysing one borehole a time. Different correlations are suggested in the different boreholes. It therefore remains uncertain to use the presented results for the entire deposit. The visible and near infrared spectral analysis… Advisors/Committee Members: Buxton, M.W.N. (mentor).

Subjects/Keywords: gold; alteration; XRF; Suriname

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Carlier, L. C. F. (. (2012). Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:9f70672e-3161-40a9-ac86-e9430cf85548

Chicago Manual of Style (16^th Edition):

Carlier, L C F (author). “Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname.” 2012. Masters Thesis, Delft University of Technology. Accessed March 07, 2021. http://resolver.tudelft.nl/uuid:9f70672e-3161-40a9-ac86-e9430cf85548.

MLA Handbook (7^th Edition):

Carlier, L C F (author). “Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname.” 2012. Web. 07 Mar 2021.

Vancouver:

Carlier LCF(. Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Mar 07]. Available from: http://resolver.tudelft.nl/uuid:9f70672e-3161-40a9-ac86-e9430cf85548.

Council of Science Editors:

Carlier LCF(. Characterization of the geological and geo-chemical footprint of the Koolhoven gold deposit, Suriname. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:9f70672e-3161-40a9-ac86-e9430cf85548

University of Montana

4. Berger, Alexis. POISONS IN THE BASEMENT: AN ANALYSIS OF X-RAY FLUORESCENCE TESTS FOR HEAVY METAL PESTICIDES IN THE UNIVERSITY OF MONTANA’S ETHNOGRAPHIC COLLECTION.

Degree: MA, 2014, University of Montana

URL: https://scholarworks.umt.edu/etd/4348

► This thesis focuses on the X-Ray Fluorescence (XRF) testing that was performed on the University of Montana’s (UM) ethnographic collection. This collection is housed in… (more)

▼ This thesis focuses on the X-Ray Fluorescence (XRF) testing that was performed on the University of Montana’s (UM) ethnographic collection. This collection is housed in a repository in the UM Anthropological Curation Facility (UMACF). The main concern over the artifacts and the reason behind the decision to perform such testing was to determine if any hazardous pesticides were used as part of past conservation treatments on the collection over the course of its history at the University of Montana. The XRF tests were performed during the winter of 2011-2012 on over 350 artifacts. The results had been previously unanalyzed. The result of the scanning yielded 844 graphs showing the levels of nine different heavy metals and elements. These elements included arsenic, lead, mercury, bromine, barium, selenium, cadmium, chromium, and antimony, all of which can be hazardous to humans who may interact with the artifacts. Further, the presence of some of these elements, such as bromine, may indicate that items were treated with pesticides. A sample of 131 of the artifacts and 258 of the test results showed high concentrations of arsenic, lead, and antimony on a majority of the artifacts. The cause of the readings could be from a variety of means ranging from the manufacturing process of the items, environmental influences, or pesticide dust from a previous application. The pesticide lead arsenate, however, uses all three of the metals, lead, arsenic, and antimony. The presence of these three metals and the high correlation between the concentration of lead and the concentration of arsenic could be indicators that this pesticide was used in the collection. The conclusion of the testing showed that although these elements may be detected on the artifact, the results of XRF testing are inconclusive. XRF can provide researchers with the information that the element is present but lacks any method to explain the reason behind it. Further tests at the UMACF could prove vital in explaining these results. Until these additional tests are complete, caution, such as using nitrile gloves and respirators should be used in the collection when handling the artifacts.

Subjects/Keywords: artifacts; ethnography; XRF; anthropology; museum

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Berger, A. (2014). POISONS IN THE BASEMENT: AN ANALYSIS OF X-RAY FLUORESCENCE TESTS FOR HEAVY METAL PESTICIDES IN THE UNIVERSITY OF MONTANA’S ETHNOGRAPHIC COLLECTION. (Masters Thesis). University of Montana. Retrieved from https://scholarworks.umt.edu/etd/4348

Chicago Manual of Style (16^th Edition):

Berger, Alexis. “POISONS IN THE BASEMENT: AN ANALYSIS OF X-RAY FLUORESCENCE TESTS FOR HEAVY METAL PESTICIDES IN THE UNIVERSITY OF MONTANA’S ETHNOGRAPHIC COLLECTION.” 2014. Masters Thesis, University of Montana. Accessed March 07, 2021. https://scholarworks.umt.edu/etd/4348.

MLA Handbook (7^th Edition):

Berger, Alexis. “POISONS IN THE BASEMENT: AN ANALYSIS OF X-RAY FLUORESCENCE TESTS FOR HEAVY METAL PESTICIDES IN THE UNIVERSITY OF MONTANA’S ETHNOGRAPHIC COLLECTION.” 2014. Web. 07 Mar 2021.

Vancouver:

Berger A. POISONS IN THE BASEMENT: AN ANALYSIS OF X-RAY FLUORESCENCE TESTS FOR HEAVY METAL PESTICIDES IN THE UNIVERSITY OF MONTANA’S ETHNOGRAPHIC COLLECTION. [Internet] [Masters thesis]. University of Montana; 2014. [cited 2021 Mar 07]. Available from: https://scholarworks.umt.edu/etd/4348.

Council of Science Editors:

Berger A. POISONS IN THE BASEMENT: AN ANALYSIS OF X-RAY FLUORESCENCE TESTS FOR HEAVY METAL PESTICIDES IN THE UNIVERSITY OF MONTANA’S ETHNOGRAPHIC COLLECTION. [Masters Thesis]. University of Montana; 2014. Available from: https://scholarworks.umt.edu/etd/4348

5. Boscaro, Mateus Eugenio. Determinação de elementos químicos em plásticos biodegradáveis naturais e sintéticos.

Degree: Mestrado, Energia Nuclear na Agricultura e no Ambiente, 2014, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/64/64134/tde-26012015-144429/ ;

►

Preocupações com o acúmulo de lixo plástico e seu consequente impacto ambiental levaram os cientistas e a indústria química, nas últimas décadas, a uma busca… (more)

▼

Preocupações com o acúmulo de lixo plástico e seu consequente impacto ambiental levaram os cientistas e a indústria química, nas últimas décadas, a uma busca por plásticos biodegradáveis e plásticos produzidos com matérias-primas de fontes renováveis. Entre eles, encontram-se o poli(ácido lático), o poli(?-caprolactona), os poli(hidroxialcanoatos), os polímeros de amido e os polímeros sintéticos que recebem aditivos que facilitam a degradação, conhecidos como oxi-biodegradáveis. Em decorrência dos processos de produção e uso de aditivos e corantes, os plásticos podem conter constituintes que não fazem parte das moléculas do polímero. Por esta razão, o objetivo do trabalho foi determinar os elementos químicos presentes em amostras de polímeros biodegradáveis, sacolas oxi-biodegradáveis e sacolas de amido distribuídas em supermercados, empregando-se análise por ativação neutrônica instrumental (INAA) e espectroscopia de fluorescência de raios X (XRF). A identificação dos polímeros das sacolas de supermercado foi realizada por espectroscopia de absorção no infravermelho com transformada de Fourier (FTIR). Os resultados das análises químicas dos polímeros não processados evidenciaram baixas concentrações dos elementos químicos. Já os plásticos das sacolas apresentaram altas concentrações de cálcio, sódio, zinco e titânio, provenientes do uso de cargas minerais, corantes e outros aditivos. Em algumas amostras, as concentrações de zinco, cobalto, cromo, molibdênio e chumbo excederam os limites estabelecidos pela norma ABNT NBR 15448-2:2008 para polímeros biodegradáveis. As análises também indicaram que os aditivos pró-oxidantes utilizados nas sacolas oxi-biodegradáveis são baseados em compostos químicos que contêm ferro. Os resultados obtidos comprovam que os plásticos biodegradáveis podem ser utilizados de forma segura em embalagens e outras aplicações, desde que se evitem os aditivos contendo elementos químicos tóxicos e outras substâncias perigosas

Concerns about the accumulation of plastic waste and its consequent environmental impact have led scientists and chemical industry, in recent decades, to search for biodegradable plastics and plastics made with renewable raw materials. Among them are included poly (lactic acid), polycaprolactone, polyhydroxyalkanoates, starch polymers and synthetic polymers having additives which facilitate degradation, known as oxo-biodegradable. Due to production processes and use of additives and dyes, plastics may contain small amounts of chemical elements that are not part of the polymer molecules. For this reason, the objective of this study was to determine chemical elements in samples of biodegradable polymers, oxy-biodegradable and starch bags distributed in supermarkets by instrumental neutron activation analysis (INAA) and X-ray fluorescence spectroscopy (XRF). The polymers of plastic bags were identified by Fourier transform infrared spectroscopy (FTIR). Results of chemical analysis of unprocessed polymers have shown low concentrations of chemical elements. On the other hand,…

Advisors/Committee Members: Fernandes, Elisabete Aparecida De Nadai.

Subjects/Keywords: FTIR; FTIR; INAA; INAA; Oxi-biodegradáveis; Oxo-biodegradable; Polímeros; XRF; XRF

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Boscaro, M. E. (2014). Determinação de elementos químicos em plásticos biodegradáveis naturais e sintéticos. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/64/64134/tde-26012015-144429/ ;

Chicago Manual of Style (16^th Edition):

Boscaro, Mateus Eugenio. “Determinação de elementos químicos em plásticos biodegradáveis naturais e sintéticos.” 2014. Masters Thesis, University of São Paulo. Accessed March 07, 2021. http://www.teses.usp.br/teses/disponiveis/64/64134/tde-26012015-144429/ ;.

MLA Handbook (7^th Edition):

Boscaro, Mateus Eugenio. “Determinação de elementos químicos em plásticos biodegradáveis naturais e sintéticos.” 2014. Web. 07 Mar 2021.

Vancouver:

Boscaro ME. Determinação de elementos químicos em plásticos biodegradáveis naturais e sintéticos. [Internet] [Masters thesis]. University of São Paulo; 2014. [cited 2021 Mar 07]. Available from: http://www.teses.usp.br/teses/disponiveis/64/64134/tde-26012015-144429/ ;.

Council of Science Editors:

Boscaro ME. Determinação de elementos químicos em plásticos biodegradáveis naturais e sintéticos. [Masters Thesis]. University of São Paulo; 2014. Available from: http://www.teses.usp.br/teses/disponiveis/64/64134/tde-26012015-144429/ ;

6. Curado, Jessica Fleury. Estudo e caracterização física de cerâmicas indígenas brasileiras.

Degree: PhD, Física, 2012, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07082012-160635/ ;

►

O presente trabalho tem por objetivo caracterizar e identificar a natureza de recursos cerâmicos brasileiros utilizando métodos físicos não destrutivos. O estudo está inserido na… (more)

▼

O presente trabalho tem por objetivo caracterizar e identificar a natureza de recursos cerâmicos brasileiros utilizando métodos físicos não destrutivos. O estudo está inserido na área interdisciplinar da Arqueometria e envolve a participação de pesquisadores do Museu de Arqueologia e Etnografia da Universidade de São Paulo (MAE-USP). As amostras analisadas são de grande interesse arqueológico, pois foram coletadas em uma região do Pantanal sul-matogrossense que possui um complexo processo de ocupação envolvendo diversas tradições culturais, entre as quais a tradição Guarani e a tradição Pantanal. Os fragmentos cerâmicos foram caracterizados através das técnicas de Emissão de Raios X Induzido por Partícula (PIXE) e Fluorescência de Raios X (XRF) para a determinação da composição da matriz da pasta cerâmica e através da técnica de Radiografia Computadorizada para a investigação da estrutura interna das peças. A técnica PIXE permitiu uma caracterização dos elementos majoritários encontrados na matriz cerâmica (Z<26), usados na previsão do valor da densidade da matriz. A técnica XRF foi utilizada para determinar as concentrações elementares com destaque para os elementos minoritários (Z>26, wt%<5%) presentes na pasta cerâmica. Essas técnicas, quando associadas a métodos de análise estatísticos permitiram um melhor entendimento do conjunto de amostras. Os resultados encontrados apontam uma clara diferença na composição elementar das amostras encontradas nos diferentes sítios arqueológicos e pertencentes às diferentes tradições. Com a aplicação da técnica de Radiografia as amostras foram separadas de acordo com a presença de tempero em sua estrutura e através da análise das imagens radiográficas foi determinada a densidade dos fragmentos. Neste trabalho foi possível estabelecer uma relação entre os fragmentos cerâmicos estudados às suas tradições, assim como aos sítios arqueológicos nos quais foram coletados.

The present work aims to characterize and identify the nature of Brazilian ceramics using non-destructive physical methods. The study is inserted in the interdisciplinary area of the Archaeometry and involves the participation of researchers from the Museum of Archaeology and Ethnography of the University of São Paulo (MAE-USP). The analyzed samples are of great archaeological interest, as they have been collected in a region of Pantanal in the state of Mato Grosso do sul with a complex settlement process that involves different cultural traditions like the Guarani tradition and the tradition Pantanal. The ceramic fragments were characterized through the techniques of X-ray Emission Particle-Induced (PIXE) and X-Ray Fluorescence (XRF) to determine the composition of the matrix of the ceramic paste and using the technique of Computed Radiography for the investigation of internal structure of the sherds. PIXE technique allowed a characterization of majoritarian elements found in ceramic matrix (Z < 26) and was used in the prediction of the density of the paste. XRF technique was used to determine the elemental…

Advisors/Committee Members: Added, Nemitala.

Subjects/Keywords: Archaeometry; Arqueometria; Cerâmica; PIXE; PIXE; Pottery; Radiografia; Radiography; XRF; XRF

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Curado, J. F. (2012). Estudo e caracterização física de cerâmicas indígenas brasileiras. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07082012-160635/ ;

Chicago Manual of Style (16^th Edition):

Curado, Jessica Fleury. “Estudo e caracterização física de cerâmicas indígenas brasileiras.” 2012. Doctoral Dissertation, University of São Paulo. Accessed March 07, 2021. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07082012-160635/ ;.

MLA Handbook (7^th Edition):

Curado, Jessica Fleury. “Estudo e caracterização física de cerâmicas indígenas brasileiras.” 2012. Web. 07 Mar 2021.

Vancouver:

Curado JF. Estudo e caracterização física de cerâmicas indígenas brasileiras. [Internet] [Doctoral dissertation]. University of São Paulo; 2012. [cited 2021 Mar 07]. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07082012-160635/ ;.

Council of Science Editors:

Curado JF. Estudo e caracterização física de cerâmicas indígenas brasileiras. [Doctoral Dissertation]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07082012-160635/ ;

Royal Roads University

7. Allan, Kenneth. Urban park soils metals distribution in the Victoria area, British Columbia .

Degree: 2015, Royal Roads University

URL: http://hdl.handle.net/10170/800

► Surface soils in 20 urban parks in the Greater Victoria area were sampled and screened using a portable X-ray fluorescence (XRF) analyzer. Bioaccessibility results indicated… (more)

Subjects/Keywords: Bioaccessibility; Metals; Park; Soils; Urban; XRF

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Allan, K. (2015). Urban park soils metals distribution in the Victoria area, British Columbia . (Thesis). Royal Roads University. Retrieved from http://hdl.handle.net/10170/800

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):

Allan, Kenneth. “Urban park soils metals distribution in the Victoria area, British Columbia .” 2015. Thesis, Royal Roads University. Accessed March 07, 2021. http://hdl.handle.net/10170/800.

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

MLA Handbook (7^th Edition):

Allan, Kenneth. “Urban park soils metals distribution in the Victoria area, British Columbia .” 2015. Web. 07 Mar 2021.

Vancouver:

Allan K. Urban park soils metals distribution in the Victoria area, British Columbia . [Internet] [Thesis]. Royal Roads University; 2015. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10170/800.

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

Council of Science Editors:

Allan K. Urban park soils metals distribution in the Victoria area, British Columbia . [Thesis]. Royal Roads University; 2015. Available from: http://hdl.handle.net/10170/800

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

Linnaeus University

8. Qvarforth, Anna. Kartläggning av metallförekomst med XRF Väsmanstranden, Ludvika : En fördjupad riskbedömning.

Degree: Biology and Environmental Science, 2020, Linnaeus University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96153

► Abstract Centrally located in Ludvika, between the central station and the south-eastern part of Lake Väsman, the area called "Väsmanstranden" is located. The closeness… (more)

▼ Abstract Centrally located in Ludvika, between the central station and the south-eastern part of Lake Väsman, the area called "Väsmanstranden" is located. The closeness to both Väsman and all its nearby natural deposits and the railroad have created excellent conditions for many businesses to flourish on the site over the years. For example, there have been sawmills, impregnation operations, a concrete plant and several oil companies. In addition, an extensive transhipment of sulphide ore resulting from the nearby mines has taken place from boat to rail near the water. Several of these historical activities have left pollution of various kinds. Investigations carried out have shown, in particular, oil pollution and metals. Today, Väsmanstranden is used to a relatively small extent. However, greater utilization of the site is to be expected, as the municipality intends to carry out extensive exploitation of the area. The purpose of this thesis was to carry out a supplementary and extended environmental risk analysis of Väsmanstranden. For practical and economic reasons, the analysis was limited to only include metals. Soil sampling, based on a sampling plan designed to supplement previous surveys, was carried out in a total of 40 points. The sampled soil was quantitatively analyzed with XRF, Xray fluorescence. The metals whose concentration was investigated were lead, barium, zinc, cobalt, arsenic, copper, chromium, cadmium, nickel and mercury. The study also included conducting a site-specific survey study in which Väsmanstranden's current visitor frequency was mapped. In the more extended part of the work, site-specific guideline values were generated using the Swedish Environmental Protection Agency's guideline value model. This was done for the metals lead, barium, zinc, nickel and arsenic, which were detected at high concentrations in many places in the area. For the same metals, a modeling of dispersion and an exposure analysis were also performed. All of the surveyed sub-areas of Väsmanstranden were found to contain at least some metal in a content that exceeds the limit for which can be tolerated when ”less sensitive landuse” is taken into consideration. In significantly more test points, the limit for ”sensitive landuse” was exceeded. Metal concentrations exceeding developed site-specific guideline values also occurred in all subareas. On a promontory in one of the northern parts of the study area that had not previously been sampled, arsenic was found in high concentrations. There is a risk that the levels of arsenic, barium, nickel and lead present can lead to unacceptable exposure in an envisaged future scenario. The dispersion modeling showed the risk of spreading to groundwater at levels that exceed assessment bases derived from the Geological Survey of Sweden. Although both model and parameter uncertainties exist in the methods used, it is clear that measures that reduce risks to humans, animals and the environment should be taken. Probably, remediation consisting of…

Subjects/Keywords: Miljöriskanalys; Väsmanstranden; Ludvika; XRF; Environmental Sciences; Miljövetenskap

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Qvarforth, A. (2020). Kartläggning av metallförekomst med XRF Väsmanstranden, Ludvika : En fördjupad riskbedömning. (Thesis). Linnaeus University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96153

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):

Qvarforth, Anna. “Kartläggning av metallförekomst med XRF Väsmanstranden, Ludvika : En fördjupad riskbedömning.” 2020. Thesis, Linnaeus University. Accessed March 07, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96153.

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

MLA Handbook (7^th Edition):

Qvarforth, Anna. “Kartläggning av metallförekomst med XRF Väsmanstranden, Ludvika : En fördjupad riskbedömning.” 2020. Web. 07 Mar 2021.

Vancouver:

Qvarforth A. Kartläggning av metallförekomst med XRF Väsmanstranden, Ludvika : En fördjupad riskbedömning. [Internet] [Thesis]. Linnaeus University; 2020. [cited 2021 Mar 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96153.

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

Council of Science Editors:

Qvarforth A. Kartläggning av metallförekomst med XRF Väsmanstranden, Ludvika : En fördjupad riskbedömning. [Thesis]. Linnaeus University; 2020. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96153

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

University of Tennessee – Knoxville

9. Cooper, Michael. Semi-Empirical Modeling and Implementation of Hybrid K-Edge Densitometry for Pyroprocessing Applications.

Degree: MS, Nuclear Engineering, 2019, University of Tennessee – Knoxville

URL: https://trace.tennessee.edu/utk_gradthes/5526

► The United States is currently looking at options for handling of spent nuclear fuel.Currently, there are ≈ 70, 000 metric tons of spent fuel in… (more)

Subjects/Keywords: MCNP; KED; XRF; Pyroprocessing; HKED; Safeguards

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Cooper, M. (2019). Semi-Empirical Modeling and Implementation of Hybrid K-Edge Densitometry for Pyroprocessing Applications. (Thesis). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_gradthes/5526

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):

Cooper, Michael. “Semi-Empirical Modeling and Implementation of Hybrid K-Edge Densitometry for Pyroprocessing Applications.” 2019. Thesis, University of Tennessee – Knoxville. Accessed March 07, 2021. https://trace.tennessee.edu/utk_gradthes/5526.

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

MLA Handbook (7^th Edition):

Cooper, Michael. “Semi-Empirical Modeling and Implementation of Hybrid K-Edge Densitometry for Pyroprocessing Applications.” 2019. Web. 07 Mar 2021.

Vancouver:

Cooper M. Semi-Empirical Modeling and Implementation of Hybrid K-Edge Densitometry for Pyroprocessing Applications. [Internet] [Thesis]. University of Tennessee – Knoxville; 2019. [cited 2021 Mar 07]. Available from: https://trace.tennessee.edu/utk_gradthes/5526.

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

Council of Science Editors:

Cooper M. Semi-Empirical Modeling and Implementation of Hybrid K-Edge Densitometry for Pyroprocessing Applications. [Thesis]. University of Tennessee – Knoxville; 2019. Available from: https://trace.tennessee.edu/utk_gradthes/5526

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

Cranfield University

10. Dunster, J. M. Developing a methodology for the non-destructive analysis of British soft-paste porcelain.

Degree: 2016, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/12766

► Soft-paste porcelain was produced in Britain in great quantities between the mid-18th and early 19th centuries. Due to industrial secrecy and the complexities of creating… (more)

Subjects/Keywords: X-ray fluorescence (XRF); Porcelain; Ceramics

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Dunster, J. M. (2016). Developing a methodology for the non-destructive analysis of British soft-paste porcelain. (Thesis). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/12766

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):

Dunster, J M. “Developing a methodology for the non-destructive analysis of British soft-paste porcelain.” 2016. Thesis, Cranfield University. Accessed March 07, 2021. http://dspace.lib.cranfield.ac.uk/handle/1826/12766.

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

MLA Handbook (7^th Edition):

Dunster, J M. “Developing a methodology for the non-destructive analysis of British soft-paste porcelain.” 2016. Web. 07 Mar 2021.

Vancouver:

Dunster JM. Developing a methodology for the non-destructive analysis of British soft-paste porcelain. [Internet] [Thesis]. Cranfield University; 2016. [cited 2021 Mar 07]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/12766.

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

Council of Science Editors:

Dunster JM. Developing a methodology for the non-destructive analysis of British soft-paste porcelain. [Thesis]. Cranfield University; 2016. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/12766

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

Cranfield University

11. Dunster, Joanna Margaret. Developing a methodology for the non-destructive analysis of British soft-paste porcelain.

Degree: PhD, 2016, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/12766 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738619

► Soft-paste porcelain was produced in Britain in great quantities between the mid-18th and early 19th centuries. Due to industrial secrecy and the complexities of creating… (more)

Subjects/Keywords: X-ray fluorescence (XRF); Porcelain; Ceramics

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Dunster, J. M. (2016). Developing a methodology for the non-destructive analysis of British soft-paste porcelain. (Doctoral Dissertation). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/12766 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738619

Chicago Manual of Style (16^th Edition):

Dunster, Joanna Margaret. “Developing a methodology for the non-destructive analysis of British soft-paste porcelain.” 2016. Doctoral Dissertation, Cranfield University. Accessed March 07, 2021. http://dspace.lib.cranfield.ac.uk/handle/1826/12766 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738619.

MLA Handbook (7^th Edition):

Dunster, Joanna Margaret. “Developing a methodology for the non-destructive analysis of British soft-paste porcelain.” 2016. Web. 07 Mar 2021.

Vancouver:

Dunster JM. Developing a methodology for the non-destructive analysis of British soft-paste porcelain. [Internet] [Doctoral dissertation]. Cranfield University; 2016. [cited 2021 Mar 07]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/12766 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738619.

Council of Science Editors:

Dunster JM. Developing a methodology for the non-destructive analysis of British soft-paste porcelain. [Doctoral Dissertation]. Cranfield University; 2016. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/12766 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738619

12. Raninen, Linn. Metallförorenade bottensediment : En undersökning av fem sjöar påverkade av metallutvinning i Bergslagen och i Västerbottens inland.

Degree: Ecology and Environmental Sciences, 2017, Umeå University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133405

► This study aims to assess the potential environmental risks posed by sediments in five lakes affected by present or historical metallurgy. Special attention is… (more)

Subjects/Keywords: Lakes; Sediment; Tailings; XRF; Environmental Sciences; Miljövetenskap

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Raninen, L. (2017). Metallförorenade bottensediment : En undersökning av fem sjöar påverkade av metallutvinning i Bergslagen och i Västerbottens inland. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133405

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):

Raninen, Linn. “Metallförorenade bottensediment : En undersökning av fem sjöar påverkade av metallutvinning i Bergslagen och i Västerbottens inland.” 2017. Thesis, Umeå University. Accessed March 07, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133405.

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

MLA Handbook (7^th Edition):

Raninen, Linn. “Metallförorenade bottensediment : En undersökning av fem sjöar påverkade av metallutvinning i Bergslagen och i Västerbottens inland.” 2017. Web. 07 Mar 2021.

Vancouver:

Raninen L. Metallförorenade bottensediment : En undersökning av fem sjöar påverkade av metallutvinning i Bergslagen och i Västerbottens inland. [Internet] [Thesis]. Umeå University; 2017. [cited 2021 Mar 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133405.

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

Council of Science Editors:

Raninen L. Metallförorenade bottensediment : En undersökning av fem sjöar påverkade av metallutvinning i Bergslagen och i Västerbottens inland. [Thesis]. Umeå University; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133405

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

Boston University

13. Sparling, Loren Tai. Ceramics and the Central Lydia Archaeological Survey (CLAS): a diachronic study using portable X-ray fluorescence (pXRF).

Degree: 2014, Boston University

URL: http://hdl.handle.net/2144/14308

► This Master's project explores the viability of portable XRF (pXRF) for the purposes of identifying the chemical signatures of ceramics collected as part of archaeological… (more)

Subjects/Keywords: Archaeology; CLAS; Lydia; XRF; Ceramics; Survey

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Sparling, L. T. (2014). Ceramics and the Central Lydia Archaeological Survey (CLAS): a diachronic study using portable X-ray fluorescence (pXRF). (Thesis). Boston University. Retrieved from http://hdl.handle.net/2144/14308

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):

Sparling, Loren Tai. “Ceramics and the Central Lydia Archaeological Survey (CLAS): a diachronic study using portable X-ray fluorescence (pXRF).” 2014. Thesis, Boston University. Accessed March 07, 2021. http://hdl.handle.net/2144/14308.

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

MLA Handbook (7^th Edition):

Sparling, Loren Tai. “Ceramics and the Central Lydia Archaeological Survey (CLAS): a diachronic study using portable X-ray fluorescence (pXRF).” 2014. Web. 07 Mar 2021.

Vancouver:

Sparling LT. Ceramics and the Central Lydia Archaeological Survey (CLAS): a diachronic study using portable X-ray fluorescence (pXRF). [Internet] [Thesis]. Boston University; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2144/14308.

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

Council of Science Editors:

Sparling LT. Ceramics and the Central Lydia Archaeological Survey (CLAS): a diachronic study using portable X-ray fluorescence (pXRF). [Thesis]. Boston University; 2014. Available from: http://hdl.handle.net/2144/14308

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

Université de Grenoble

14. Parsons, Christopher. Distribution et mobilité de l'arsenic dans les sols : effets de cycles redox successifs : Distribution and mobility of arsenic in soils and sediments : the effects of redox cycling.

Degree: Docteur es, Sciences de la Terre et de l'Univers et de l'Environnement, 2011, Université de Grenoble

URL: http://www.theses.fr/2011GRENU029

►

L'arsenic est un metalloïde toxique et cancérigène. Ubiquiste dans la pedosphere, il est très sensibleaux fluctuations des conditions redox du sol, ce qui influe significativement… (more)

▼

L'arsenic est un metalloïde toxique et cancérigène. Ubiquiste dans la pedosphere, il est très sensibleaux fluctuations des conditions redox du sol, ce qui influe significativement sa toxicité et mobilité. Nousétudions le cycle biogéochimique global de l'arsenic, en tenant compte de l'usage croissant des ressources, etpassons en revue l'importance respective de l’arsenic geogénique et anthropogénique dans l’environnement.La contamination à l’arsenic est souvent diffuse dans les bassins sédimentaires de l'Europe. Cependant, desconcentrations dans l'eau interstitielle du sol peuvent être élevées lors de périodes de saturation du solcausées par la monté des eaux souterraines ou les inondations, prévues d'augmenter dû aux changementsclimatiques. La spectrométrie de fluorescence X quantitative et sans standard a été utilisée pour analyserl'arsenic dans des sols relativement contaminés de la plaine alluviale de la Saône au moyen de protocoles depréparation d'échantillons conçus pour optimiser la précision d'analyse et l'exactitude in situ aux bassesconcentrations d'arsenic. L'arsenic dans ces sols est associe aux (hydr)oxydes du fer et de manganèse de lataille d'argile colloïdale. Ceux-ci subissent une dissolution réductrice par les microorganismes lors desinondations, libérant une importante concentration d'arsenic dans la phase aqueuse. Si, par la suite, l'arsenicdégagé n'est pas éliminé avec l'eau de crue évacuée, il est ré-immobilisé pendant l'oxydation du sol et lareprécipitation des oxydes métalliques. Grâce à une combinaison novatrice d'analyses chimiques par voiehumide, d’écologie microbienne, de spectroscopie ainsi que de modélisation thermodynamique et cinétique,nous démontrons que les cycles d'oxydo-réduction séquentiels entraînent une atténuation d'arsenic aqueuxdans des conditions réductrices dû à la coprécipitation croissante, et a une diminution de l'activitémicrobienne causée par l’appauvrissement en matière organique labile. Des processus d'atténuationsimilaires sont observés en l'absence d'activité microbienne pour Cr et As dans des argiles pyriteuses lorsquecelles-ci sont exposés aux oscillations redox provoquées par l'ajout de substances humiques réduites. Ainsi,nous montrons que les effets cumulatifs de cycles redox successifs sont extrêmement importants pour lamobilité de divers contaminants dans l'environnement.

Arsenic is a toxic and carcinogenic metalloid, ubiquitous in the pedosphere and highly sensitive tofluctuations in soil redox conditions which dramatically influence both its toxicity and mobility. We reviewthe global biogeochemical cycle of arsenic in light of increasing resource usage and re-evaluate theimportance of anthropogenic and geogenic arsenic inputs to the exogenic cycle. Arsenic contamination isoften diffuse in European sedimentary basins. Despite this, concentrations in soil pore-water may be highduring periods of soil saturation caused by rising groundwater or surface flooding which is predicted toincrease due to climatic change. Standardless quantitative X-ray fluorescence…

Advisors/Committee Members: Charlet, Laurent (thesis director), Roman-Ross, Gabriela (thesis director).

Subjects/Keywords: Arsenic; Inondation; Redox; XRF; Contamination; PHREEQC; Cyclage redox; FeOOH; Arsenic; Flooding; XRF; Contamination; Redox cycling; FP-XRF; PHREEQC; Ciclos redox; Arsénico; FP-XRF; PXRF; Inundaciones; FeOOH; PHREEQC; 550

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Parsons, C. (2011). Distribution et mobilité de l'arsenic dans les sols : effets de cycles redox successifs : Distribution and mobility of arsenic in soils and sediments : the effects of redox cycling. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2011GRENU029

Chicago Manual of Style (16^th Edition):

Parsons, Christopher. “Distribution et mobilité de l'arsenic dans les sols : effets de cycles redox successifs : Distribution and mobility of arsenic in soils and sediments : the effects of redox cycling.” 2011. Doctoral Dissertation, Université de Grenoble. Accessed March 07, 2021. http://www.theses.fr/2011GRENU029.

MLA Handbook (7^th Edition):

Parsons, Christopher. “Distribution et mobilité de l'arsenic dans les sols : effets de cycles redox successifs : Distribution and mobility of arsenic in soils and sediments : the effects of redox cycling.” 2011. Web. 07 Mar 2021.

Vancouver:

Parsons C. Distribution et mobilité de l'arsenic dans les sols : effets de cycles redox successifs : Distribution and mobility of arsenic in soils and sediments : the effects of redox cycling. [Internet] [Doctoral dissertation]. Université de Grenoble; 2011. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2011GRENU029.

Council of Science Editors:

Parsons C. Distribution et mobilité de l'arsenic dans les sols : effets de cycles redox successifs : Distribution and mobility of arsenic in soils and sediments : the effects of redox cycling. [Doctoral Dissertation]. Université de Grenoble; 2011. Available from: http://www.theses.fr/2011GRENU029

15. Caliri, Claudia. A mobile xrf scanner for a real-time elemental imaging of painted artworks.

Degree: 2017, Università degli Studi di Catania

URL: http://hdl.handle.net/10761/3771

► Painted artworks are complex multi-layered materials studied over the time with several sophisticated imaging techniques. Scanning MA-XRF technique provides information on pigment materials and their… (more)

▼ Painted artworks are complex multi-layered materials studied over the time with several sophisticated imaging techniques. Scanning MA-XRF technique provides information on pigment materials and their distribution over the painted surface in non-invasive manner. Further, it provides information on conservation state of artworks and also their authenticity can be approached. The penetrating nature of X-rays allows visualizing overpainted hidden pictorial compositions, not visible to naked eye. In the present PhD activity an advanced XRF scanning system for a real time imaging of painted artworks has been developed at the LANDIS laboratory of LNS-INFN and IBAM-CNR in Catania (Italy).The MA-XRF scanner presents a modular set-up to be assembled/disassembled in a short time (30-60 min) and easily moved in museums for analyses in situ. Spectrometric head is moved by three linear stages covering an area up to 110 × 70 × 20 cm3 (XYZ) . All motion sensors and their synchronization with the acquisition system are fully controlled by a custom developed and programmed Control Unit (CU) and all instrument operations can be in real-time monitored by a graphical user interface (GUI). The CU controls also the Z-axis movement, along the focal distance, via the communication with a laser triangulation sensor maintaining dynamically constant the painting-spectrometer distance in case of non-flat sample surface. Further, the CU interrupts immediately the scan if the safety distance is overcame. SDD detector coupled to a Digital X-ray Processors (DXP) that works in a time-list event mode (TLIST) allows to perform scans in real time (or in continuous mode). Ultra-fast scans can be performed up to 100 mm/sec covering the total area in 4.2 hours. The MA-XRF device is aimed to the macroscopic analysis of large size paintings. However, the use of a polycapillary lens equipping the X-ray source, allows to combine imaging at both the macro and micro scale of length with a simple adjustment of the sample position along the focal distance obtaining a lateral resolution up to 35 µm. A long range optical microscope is used for the accurate positioning of the painting. To date, performances of this device in terms of lateral resolution, scanning speed and dimensions of the scanning area, makes it as one of the most (or even the most) efficient portable MA-XRF systems available in the scientific community for studying paintings. X-ray spectra are processed in real-time during the scanning by the non-linear least-squares fitting procedure developed in PyMCa and integrated in the in-house programmed analysis software with a maximum processing speed of 5000 fitted spectra per second. Further a number of editing and mathematical tools for processing the images in live-mode are available. During the present research activity, the scanner was validated by studying three painted artworks on different support (canvas, wood and paper) and different size, for which the instrument has been moved in situ. MA-XRF provided valuable information through the…

Subjects/Keywords: Area 02 - Scienze fisiche; XRF Imaging technique, MA-XRF, Mobile macro-XRF scanner, Historical paintings, event-mode acquisition, painted artworks pigments, non-destructive analysis, real-time MA-XRF imaging

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Caliri, C. (2017). A mobile xrf scanner for a real-time elemental imaging of painted artworks. (Thesis). Università degli Studi di Catania. Retrieved from http://hdl.handle.net/10761/3771

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):

Caliri, Claudia. “A mobile xrf scanner for a real-time elemental imaging of painted artworks.” 2017. Thesis, Università degli Studi di Catania. Accessed March 07, 2021. http://hdl.handle.net/10761/3771.

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

MLA Handbook (7^th Edition):

Caliri, Claudia. “A mobile xrf scanner for a real-time elemental imaging of painted artworks.” 2017. Web. 07 Mar 2021.

Vancouver:

Caliri C. A mobile xrf scanner for a real-time elemental imaging of painted artworks. [Internet] [Thesis]. Università degli Studi di Catania; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10761/3771.

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

Council of Science Editors:

Caliri C. A mobile xrf scanner for a real-time elemental imaging of painted artworks. [Thesis]. Università degli Studi di Catania; 2017. Available from: http://hdl.handle.net/10761/3771

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

Uniwersytet im. Adama Mickiewicza w Poznaniu

16. Pleskot, Krzysztof. Holoceńskie zmiany środowiska okolic Poznania (środkowa Wielkopolska) w świetle badań paleolimnologicznych jezior: Strzeszyńskiego, Kierskiego i Glinnowieckiego .

Degree: 2019, Uniwersytet im. Adama Mickiewicza w Poznaniu

URL: http://hdl.handle.net/10593/25494

► Niniejsza praca przedstawia szczegółową analizę zapisu osadowego z trzech jezior: Strzeszyńskiego, Kierskiego i Glinnowieckiego, a główny problem jaki podejmuje to zmiany środowiska w Wielkopolsce w… (more)

Subjects/Keywords: osady jeziorne; skanowanie XRF; paleośrodowisko; zachodnia Polska

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Pleskot, K. (2019). Holoceńskie zmiany środowiska okolic Poznania (środkowa Wielkopolska) w świetle badań paleolimnologicznych jezior: Strzeszyńskiego, Kierskiego i Glinnowieckiego . (Doctoral Dissertation). Uniwersytet im. Adama Mickiewicza w Poznaniu. Retrieved from http://hdl.handle.net/10593/25494

Chicago Manual of Style (16^th Edition):

Pleskot, Krzysztof. “Holoceńskie zmiany środowiska okolic Poznania (środkowa Wielkopolska) w świetle badań paleolimnologicznych jezior: Strzeszyńskiego, Kierskiego i Glinnowieckiego .” 2019. Doctoral Dissertation, Uniwersytet im. Adama Mickiewicza w Poznaniu. Accessed March 07, 2021. http://hdl.handle.net/10593/25494.

MLA Handbook (7^th Edition):

Pleskot, Krzysztof. “Holoceńskie zmiany środowiska okolic Poznania (środkowa Wielkopolska) w świetle badań paleolimnologicznych jezior: Strzeszyńskiego, Kierskiego i Glinnowieckiego .” 2019. Web. 07 Mar 2021.

Vancouver:

Pleskot K. Holoceńskie zmiany środowiska okolic Poznania (środkowa Wielkopolska) w świetle badań paleolimnologicznych jezior: Strzeszyńskiego, Kierskiego i Glinnowieckiego . [Internet] [Doctoral dissertation]. Uniwersytet im. Adama Mickiewicza w Poznaniu; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10593/25494.

Council of Science Editors:

Pleskot K. Holoceńskie zmiany środowiska okolic Poznania (środkowa Wielkopolska) w świetle badań paleolimnologicznych jezior: Strzeszyńskiego, Kierskiego i Glinnowieckiego . [Doctoral Dissertation]. Uniwersytet im. Adama Mickiewicza w Poznaniu; 2019. Available from: http://hdl.handle.net/10593/25494

Oklahoma State University

17. Alsherari, Sahr Ayesh Salamah. Indirect determination of mica via rubidium content and direct determination of heavy metal lead in cosmetics.

Degree: Chemistry, 2019, Oklahoma State University

URL: http://hdl.handle.net/11244/323825

► Millions of people worldwide use cosmetics daily and some of these are unwittingly exposing themselves to dangerous levels of toxic elements such as lead. In… (more)

▼ Millions of people worldwide use cosmetics daily and some of these are unwittingly exposing themselves to dangerous levels of toxic elements such as lead. In addition to lead, mica has been widely used in cosmetics for its shimmery and reflective effect. Ground mica powder is pearlescent and satiny, qualities that have made it a common ingredient in cosmetics where it provides a shimmery, glittery, and reflective effects. Though mica is harmless as a solid, its powder or dust can cause both short- and long-term health problems. A means of identifying cosmetics that contain mica would be useful to ensure that measures are taken to avoid inhalation of potentially harmful particles. An investigation was performed on more than one hundred cosmetic samples from countries all over the world checking them for lead and for rubidium ions that commonly contained in mica. The samples were acid digested and then analyzed using an Agilent Microwave Plasma-Atomic Emission Spectrometer (MP-AES). Moreover, these samples were investigated using an EDAX Orbis X-Ray Fluorescence spectrometer as a facile rapid non-destructive method to detect these elements in cosmetics without the necessity of dissolution. This part of the investigation consisted of making lead XRF standards using silica gel and rubidium XRF standards using muscovite mica. It was found that some of the cosmetics samples did contain high concentrations of these elements. Several of the samples exceeded The US Food and Drug Administration (FDA) maximum recommended level for lead in cosmetics (10 ppm). In order to avoid the necessity of acid digestion, the XRF spectrometer was calibrated using lead-containing silica gel standards and the same was done for rubidium using mica and rubidium-containing silica gel standards. This allowed the cosmetic samples to be quantitatively analyzed for lead and rubidium (mica) without destroying the samples. The XRF results were compared to the concentrations determined using MP-AES to validate the use of the XRF spectrometer for analysis of lead in cosmetics. A relationship between lead and mica has been identified that explains the mysterious existence of lead as in impurity in mica-containing cosmetics. Advisors/Committee Members: Apblett, Allen (advisor), Tahsini, Laleh (committee member), El Rassi, Ziad (committee member), Matts, Robert (committee member).

Subjects/Keywords: aes; cosmetics; lead; mica; risk; xrf

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Alsherari, S. A. S. (2019). Indirect determination of mica via rubidium content and direct determination of heavy metal lead in cosmetics. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/323825

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):

Alsherari, Sahr Ayesh Salamah. “Indirect determination of mica via rubidium content and direct determination of heavy metal lead in cosmetics.” 2019. Thesis, Oklahoma State University. Accessed March 07, 2021. http://hdl.handle.net/11244/323825.

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

MLA Handbook (7^th Edition):

Alsherari, Sahr Ayesh Salamah. “Indirect determination of mica via rubidium content and direct determination of heavy metal lead in cosmetics.” 2019. Web. 07 Mar 2021.

Vancouver:

Alsherari SAS. Indirect determination of mica via rubidium content and direct determination of heavy metal lead in cosmetics. [Internet] [Thesis]. Oklahoma State University; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11244/323825.

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

Council of Science Editors:

Alsherari SAS. Indirect determination of mica via rubidium content and direct determination of heavy metal lead in cosmetics. [Thesis]. Oklahoma State University; 2019. Available from: http://hdl.handle.net/11244/323825

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

Colorado School of Mines

18. Wood, Julia Bellamy. Regional geology and chemostratigraphy of the Fort Hays Member of the Niobrara Formation, Western Interior, USA.

Degree: MS(M.S.), Geology and Geological Engineering, 2017, Colorado School of Mines

URL: http://hdl.handle.net/11124/170971

► The Late Cretaceous (89.5-82 Ma) Niobrara Formation is the primary target for hydrocarbon development in many fields throughout Colorado. The formation is composed of two… (more)

▼ The Late Cretaceous (89.5-82 Ma) Niobrara Formation is the primary target for hydrocarbon development in many fields throughout Colorado. The formation is composed of two members: the basal Fort Hays Limestone and the overlying Smoky Hill Member. Historically, production has centered on the Smoky Hill Member but recent success in the Fort Hays Limestone has sparked interest in this underlying unit. Compared to the Smoky Hill Member, the Fort Hays Limestone is markedly different in lithology, sedimentology, and elemental composition. Through detailed core descriptions, measured outcrop sections, XRF analysis, thin section petrography, and FESEM analysis, this study develops a better understanding of the unique depositional history that characterizes the Fort Hays. In order to assess regional changes, five cores and five outcrops were utilized to represent the Fort Hays on a depositional basin scale. Sedimentologically, the Fort Hays Limestone is characterized by rhythmic bedding of chalk and marl which represent climatic fluctuations that result from perturbations in the Earth’s orbit around the sun (i.e. Milankovitch cycles). Chalks were deposited during times of arid climate when siliciclastic input from the Sevier highlands was minimal and carbonate production was enhanced. Chalks are characterized by extensive bioturbation suggesting well-oxygenated benthic conditions. Conversely, marls were deposited under humid conditions where increased terrestrial runoff from the Sevier highlands diluted ongoing carbonate production. Marls are characterized by a laminite sedimentary fabric suggesting that benthic conditions were less-oxygenated and unable to support benthic fauna. Ichnological observations reveal that the Fort Hays Limestone is characterized by high frequency cycles of rapid oxygenation and deoxygenation. In the field, outcrops were measured for total Fort Hays and individual bed thicknesses and described for lithologic changes. Western outcrops exhibit changes in lithology from base to top that suggest an overall rise in sea level. Scour surfaces in the westernmost outcrops suggest a higher energy environment during marl deposition. The absence of these surfaces to the east in Hays, Kansas suggests a quieter, lower energy environment. Elemental data from X-ray fluorescence (XRF) were used to generate spatial elemental concentration maps for the Western Interior Seaway during Fort Hays time. This data suggests that detrital elements (Al, Si, Zr, and K) are primarily sourced from the west and northwest with an additional southwest source during humid climates. Carbonate elements were brought up from the south via Gulfian currents. Finally, a manganese anomaly found exclusively in the Fort Hays appears to originate from the north. The element is thought to be enriched in sea water at this time as a result of increased sea floor spreading and carried down to the basin via Arctic currents. The Fort Hays Limestone is characterized by a unique depositional history that resulted in the regional lithological and… Advisors/Committee Members: Sonnenberg, Stephen A. (advisor), Anderson, Donna S. (committee member), French, Marsha (committee member), Sarg, J. F. (J. Frederick) (committee member).

Subjects/Keywords: Fort Hays; Niobrara; chemostratigraphy; XRF; manganese

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Wood, J. B. (2017). Regional geology and chemostratigraphy of the Fort Hays Member of the Niobrara Formation, Western Interior, USA. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/170971

Chicago Manual of Style (16^th Edition):

Wood, Julia Bellamy. “Regional geology and chemostratigraphy of the Fort Hays Member of the Niobrara Formation, Western Interior, USA.” 2017. Masters Thesis, Colorado School of Mines. Accessed March 07, 2021. http://hdl.handle.net/11124/170971.

MLA Handbook (7^th Edition):

Wood, Julia Bellamy. “Regional geology and chemostratigraphy of the Fort Hays Member of the Niobrara Formation, Western Interior, USA.” 2017. Web. 07 Mar 2021.

Vancouver:

Wood JB. Regional geology and chemostratigraphy of the Fort Hays Member of the Niobrara Formation, Western Interior, USA. [Internet] [Masters thesis]. Colorado School of Mines; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11124/170971.

Council of Science Editors:

Wood JB. Regional geology and chemostratigraphy of the Fort Hays Member of the Niobrara Formation, Western Interior, USA. [Masters Thesis]. Colorado School of Mines; 2017. Available from: http://hdl.handle.net/11124/170971

Brno University of Technology

19. Koller, Kryštof. Porovnání metod pro měření tloušťky vrstev na tvarově složitých a multivrstevnatých dílech: Comparison of methods for measuring the thickness of layers on complex and multi-layered parts.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/173474

This thesis deals with methods for measuring the thickness of metal layers on polymeric, complex and multi-layered parts. Research includes finding the optimal method while considering the time limitation, preciseness and practicality of the method for industrial use. Advisors/Committee Members: Wasserbauer, Jaromír (advisor), Buchtík, Martin (referee).

Subjects/Keywords: pokovování plastů; XRF; CCC; světelná mikroskopie; plating on plastics; XRF; CCC; light microscopy

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Koller, K. (2019). Porovnání metod pro měření tloušťky vrstev na tvarově složitých a multivrstevnatých dílech: Comparison of methods for measuring the thickness of layers on complex and multi-layered parts. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/173474

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):

Koller, Kryštof. “Porovnání metod pro měření tloušťky vrstev na tvarově složitých a multivrstevnatých dílech: Comparison of methods for measuring the thickness of layers on complex and multi-layered parts.” 2019. Thesis, Brno University of Technology. Accessed March 07, 2021. http://hdl.handle.net/11012/173474.

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

MLA Handbook (7^th Edition):

Koller, Kryštof. “Porovnání metod pro měření tloušťky vrstev na tvarově složitých a multivrstevnatých dílech: Comparison of methods for measuring the thickness of layers on complex and multi-layered parts.” 2019. Web. 07 Mar 2021.

Vancouver:

Koller K. Porovnání metod pro měření tloušťky vrstev na tvarově složitých a multivrstevnatých dílech: Comparison of methods for measuring the thickness of layers on complex and multi-layered parts. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11012/173474.

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

Council of Science Editors:

Koller K. Porovnání metod pro měření tloušťky vrstev na tvarově složitých a multivrstevnatých dílech: Comparison of methods for measuring the thickness of layers on complex and multi-layered parts. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/173474

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

Delft University of Technology

20. de Almeida Nieto, Luis (author). XRF and RIS for semi-quantitative sub-surface layer detection and composition analysis of easel paintings.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d0be5ca1-624b-4774-9327-9d6f6cd3eb48

► The scientific analysis of historical paintings has been traditionally restricted to the analysis of paint cross-section samples. This invasive method provides extensive information but is… (more)

▼ The scientific analysis of historical paintings has been traditionally restricted to the analysis of paint cross-section samples. This invasive method provides extensive information but is inherently limited in scope due to the extreme heterogeneity of paintings. In the last decade, non-invasive spot analyses and spectral imaging methods have become increasingly widespread in cultural heritage science. Two of these methods are macroscopic X-ray fluorescence imaging spectroscopy (MA-XRF) and reflectance imaging spectroscopy (RIS). These methods allow for 2D-scanning the entire surface of a painting and provide complementary information on elemental and molecular composition and distribution of the paint. However, these methods are often used only for qualitative analysis of the paint based on relative distribution maps, revealing only limited information about the paint layer stratigraphy. This thesis is an exploration of a combined approach for quantitative analysis of paint composition and layer stratigraphy using MA-XRF and RIS. The research used a set of specially prepared paint samples of mixtures and multiple layer applications based on historically relevant pigments which were scanned using MA-XRF and RIS in the visible and Near IR range (400-2500 nm). The spectral data acquired were processed and analyzed in a variety of ways, including Non-negative Matrix Factorization, Non-Linear Least Square Fitting, among other methods; in an attempt to gather quantitative compositional and stratigraphic data. In these trials, using characteristic reflectance features in the visible range together with a comparison of highly and lightly absorbed X-ray fluorescence lines allowed for the identification and quantification of surface specific compounds related to the top paint layer. Further comparison of fluorescence lines and absorption features in the Near IR range provided a potential avenue for quantification of subsurface paint layers. The results confirm that the combination of these methods allows to reveal the paint stratigraphy. The project provides samples and data sets which may serve as the basis for the development of a robust algorithm to address this issue in the future. Advisors/Committee Members: Dik, J. (mentor), Alfeld, M.W.E.M. (mentor), van Loon, A. (mentor), Gonzalez, V.M.J.M. (mentor), Gabrieli, Francesca (mentor), van de Plas, R. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: MA-XRF; RIS; Painting; reflectance imaging spectroscopy; macro x-ray fluorescence; XRF

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

de Almeida Nieto, L. (. (2020). XRF and RIS for semi-quantitative sub-surface layer detection and composition analysis of easel paintings. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d0be5ca1-624b-4774-9327-9d6f6cd3eb48

Chicago Manual of Style (16^th Edition):

de Almeida Nieto, Luis (author). “XRF and RIS for semi-quantitative sub-surface layer detection and composition analysis of easel paintings.” 2020. Masters Thesis, Delft University of Technology. Accessed March 07, 2021. http://resolver.tudelft.nl/uuid:d0be5ca1-624b-4774-9327-9d6f6cd3eb48.

MLA Handbook (7^th Edition):

de Almeida Nieto, Luis (author). “XRF and RIS for semi-quantitative sub-surface layer detection and composition analysis of easel paintings.” 2020. Web. 07 Mar 2021.

Vancouver:

de Almeida Nieto L(. XRF and RIS for semi-quantitative sub-surface layer detection and composition analysis of easel paintings. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Mar 07]. Available from: http://resolver.tudelft.nl/uuid:d0be5ca1-624b-4774-9327-9d6f6cd3eb48.

Council of Science Editors:

de Almeida Nieto L(. XRF and RIS for semi-quantitative sub-surface layer detection and composition analysis of easel paintings. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:d0be5ca1-624b-4774-9327-9d6f6cd3eb48

Universidade do Estado do Rio de Janeiro

21. Ayxa Nara de Souza Rezier. Uso da técnica de EDXRF na análise de gemas semi preciosas brasileiras.

Degree: Master, 2017, Universidade do Estado do Rio de Janeiro

URL: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=10948 ;

►

O Brasil é um dos maiores e mais importantes produtores de gemas do planeta, além de destacar-se pela qualidade e variedade gemológica. Possui um amplo… (more)

▼

O Brasil é um dos maiores e mais importantes produtores de gemas do planeta, além de destacar-se pela qualidade e variedade gemológica. Possui um amplo e diversificado cenário produtivo abrangendo principalmente o mercado externo, tendo como principais setores de consumo a joalheria e a indústria de lapidação, além de uma ampla gama de utilização nas indústrias eletrônica, siderúrgica, elétrica, óptica, instrumentação, artesanato e agricultura. Com o avanço tecnológico, os estudos e pesquisas mineralógicos são de extrema importância para o entendimento das propriedades físico-químicas, a identificação e a caracterização química e estrutural das gemas, pois o emprego das gemas na indústria é função da sua composição elementar. No projeto desenvolvido, foram realizadas caracterizações elementares em amostras de algumas gemas brasileiras mediante a utilização da técnica de Fluorescência de Raios X por Dispersão em Energia (EDXRF). A determinação qualitativa de elementos teve como objetivo principal de analisar e verificar possíveis presenças de elementos e impurezas que não fazem parte da composição elementar pertencente à classe dos silicatos e carbonatos. As análises foram realizadas em dois equipamentos portáteis diferentes, o mini-XRF da Amptek e o ARTAX 200 da Bruker, com programas de aquisição e análise dos dados desses fabricantes. Os minerais analisados foram: Ametista, Calcita laranja, Ônix, Jade, Citrino, Quartzo incolor, Quartzo leitoso, Quartzo azul, Quartzo verde e Quartzo rosa. Verificou-se a existência de íons metálicos, em especial metais de transição como Ti, Cr, Mn, Fe, Co, Ni e Cu. As possíveis razões para a existência destes íons são discutidas no trabalho. Os dados das análises elementares por EDXRF indicam coerência nas composições elementares obtidos com os dois sistemas portáteis de XRF e observa-se que ambos apresentam eficiência em relação aos elementos analisados, indicando que a técnica pode ser utilizada para auxiliar no desenvolvimento de estudos mineralógicos.

Brazil is one of the largest and most important producers of gemstones on the planet, besides being distinguished by the quality and gemological variety. It has a wide and diversified production scenario covering mainly the foreign market, with the main consumer sectors being jewelery and the stoning industry, as well as a wide range of use in the electronics, steel, electrical, optics, instrumentation, handicrafts and agriculture industries. With the technological advance, mineralogical studies and research are extremely important for the understanding of physicochemical properties, identification and chemical and structural characterization of gemstones, since the use of gemstones in industry is a function of their elemental composition. In the developed project, elemental characterizations were performed in samples of some Brazilian gems using the Energy Dispersion X-Ray Fluorescence technique (EDXRF). The qualitative determination of elements had as main objective to analyze and verify possible presence of elements and…

Advisors/Committee Members: Joaquim Teixeira de Assis, Mauro Cesar Geraldes, Gil de Carvalho, Carlos Ivan Ribeiro de Oliveira, Antônio Brunetti.

Subjects/Keywords: XRF; Fluorescência; APLICACOES DE RADIOISOTOPOS; Raios X; Caracterização; Pedras preciosas; Gemas (Mineralogia); Fluorescence; XRF; Gems; X-Ray; Characterization

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Rezier, A. N. d. S. (2017). Uso da técnica de EDXRF na análise de gemas semi preciosas brasileiras. (Masters Thesis). Universidade do Estado do Rio de Janeiro. Retrieved from http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=10948 ;

Chicago Manual of Style (16^th Edition):

Rezier, Ayxa Nara de Souza. “Uso da técnica de EDXRF na análise de gemas semi preciosas brasileiras.” 2017. Masters Thesis, Universidade do Estado do Rio de Janeiro. Accessed March 07, 2021. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=10948 ;.

MLA Handbook (7^th Edition):

Rezier, Ayxa Nara de Souza. “Uso da técnica de EDXRF na análise de gemas semi preciosas brasileiras.” 2017. Web. 07 Mar 2021.

Vancouver:

Rezier ANdS. Uso da técnica de EDXRF na análise de gemas semi preciosas brasileiras. [Internet] [Masters thesis]. Universidade do Estado do Rio de Janeiro; 2017. [cited 2021 Mar 07]. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=10948 ;.

Council of Science Editors:

Rezier ANdS. Uso da técnica de EDXRF na análise de gemas semi preciosas brasileiras. [Masters Thesis]. Universidade do Estado do Rio de Janeiro; 2017. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=10948 ;

Brno University of Technology

22. Martiniaková, Ivana. Formulace inkoustů pro materiálový tisk chemických značek: Ink formulation for chemical labels printing.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/177480

► This diploma theses is about the study of the effect of individual components of printing compositions intended for material printing of identificaton codes, read by… (more)

Subjects/Keywords: XRF; chemické značky; sieťotlač; tampónová tlač; ochranné prvky; XRF; chemical labels; screen printing; pad printing; protective tags

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Martiniaková, I. (2019). Formulace inkoustů pro materiálový tisk chemických značek: Ink formulation for chemical labels printing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/177480

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):

Martiniaková, Ivana. “Formulace inkoustů pro materiálový tisk chemických značek: Ink formulation for chemical labels printing.” 2019. Thesis, Brno University of Technology. Accessed March 07, 2021. http://hdl.handle.net/11012/177480.

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

MLA Handbook (7^th Edition):

Martiniaková, Ivana. “Formulace inkoustů pro materiálový tisk chemických značek: Ink formulation for chemical labels printing.” 2019. Web. 07 Mar 2021.

Vancouver:

Martiniaková I. Formulace inkoustů pro materiálový tisk chemických značek: Ink formulation for chemical labels printing. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11012/177480.

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

Council of Science Editors:

Martiniaková I. Formulace inkoustů pro materiálový tisk chemických značek: Ink formulation for chemical labels printing. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/177480

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

Uppsala University

23. Åberg, Susanna. XRF-analys av atmosfäriskt stoft från en löss-sekvens i Ungern från den senaste istiden.

Degree: Earth Sciences, 2017, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326048

►

Stoft är ett eoliskt, klastiskt silt-material som blåst från exponerade områden via atmosfären och avsätts i form av löss-sekvenser på andra ställen i världen.… (more)

▼

Stoft är ett eoliskt, klastiskt silt-material som blåst från exponerade områden via atmosfären och avsätts i form av löss-sekvenser på andra ställen i världen. Dessa sekvenser utgör ett naturligt arkiv som innehåller information om tidigare förändringar i klimatet ända bak till kvartärtidens början för ungefär 2.5 miljoner år sedan. Mycket av stoftet i Europa avsattes under senaste istiden som var för cirka hundra tusen till tio tusen år sedan. En löss-sekvens är lokaliserad i Madaras i södra Ungern och är tio meter tjock, för det här projektet har stoft-prover från sekvensen analyserats med röntgenstrålning. Analysen visar vilka och vilken halt av grundämnen som stoftproverna från de olika nivåerna innehåller, vilket i sin tur hjälper till att rekonstruera klimat från den senaste istiden. Röntgenstrålningen har genererats av en apparat som heter Brukar S1 Titan och utför metoden XRF som står för X-ray Flourescence, vilken har utförts på Geocentrum på Uppsala Universitet. Tolkning av resultatet samt jämförelse med tidigare forskning ska hjälpa till att förstå klimatförändringar från senaste istiden genom att undersöka vittring och ursprungskälla. Resultatet indikerar på att information om klimat är bevarat i sekvensen, då slutsatsen är att vittring har haft en svag men tydlig effekt på stoftet som avsatts i Madaras, och att ändringar av stoftets ursprungskälla inte har påverkat den studerade sekvensen.

Dust is aeolian, clastic silt material that has been eroded from exposed land surfaces, blown via the atmosphere and deposited as loess sequences in other areas in the world. Loess contains information about changes in the climate all the way back to the beginning of the Quaternary, approximately 2.5 million years ago. Research shows that a lot of the European dust was deposited during the last glacial of the Quaternary period, which was from approximately one hundred thousand to ten thousand years ago. One loess sequence is located in Madaras in southern Hungary and is 10 meters thick, in this project, dust samples from the sequence have been analyzed with XRF (X-ray Flourescence). The analysis shows which and what percentage of elements the samples contain, which in turn will help to reconstruct climate from the last glacial. The analysis was conducted using a XRF machine called Bruker S1 Titan and was done at Uppsala University in Uppsala, Sweden. Interpreting of the results, as well as comparing with earlier research, will help to understand climate changes from the latest glacial by examine weathering and dust source. The result indicates that information about past climate is preserved at the site, because of the conclusion that says that weathering has had a weak but distinct effect on the dust deposited at Madaras, and that the dust source changes do not have affected the studied sequence.

Subjects/Keywords: climate changes; dust; loess; Hungary; XRF; klimatförändringar; stoft; löss; Ungern; XRF; Earth and Related Environmental Sciences; Geovetenskap och miljövetenskap

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Åberg, S. (2017). XRF-analys av atmosfäriskt stoft från en löss-sekvens i Ungern från den senaste istiden. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326048

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):

Åberg, Susanna. “XRF-analys av atmosfäriskt stoft från en löss-sekvens i Ungern från den senaste istiden.” 2017. Thesis, Uppsala University. Accessed March 07, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326048.

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

MLA Handbook (7^th Edition):

Åberg, Susanna. “XRF-analys av atmosfäriskt stoft från en löss-sekvens i Ungern från den senaste istiden.” 2017. Web. 07 Mar 2021.

Vancouver:

Åberg S. XRF-analys av atmosfäriskt stoft från en löss-sekvens i Ungern från den senaste istiden. [Internet] [Thesis]. Uppsala University; 2017. [cited 2021 Mar 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326048.

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

Council of Science Editors:

Åberg S. XRF-analys av atmosfäriskt stoft från en löss-sekvens i Ungern från den senaste istiden. [Thesis]. Uppsala University; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326048

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

24. Batista Pessoa, Walter. Probing chalcogenide films by advanced X-ray metrology for the semiconductor industry : Développement des protocoles de métrologie des nouveaux matériaux chalcogénures pour l'industrie des semi-conducteurs.

Degree: Docteur es, Physique des accélérateurs, 2018, Université Paris-Saclay (ComUE)

URL: http://www.theses.fr/2018SACLS330

► Les nouveaux matériaux de type chalcogénures (à base de S, Se, Te) font l’objet d’un intérêt croissant, non seulement pour les applications mémoires avancées, photonique… (more)

▼ Les nouveaux matériaux de type chalcogénures (à base de S, Se, Te) font l’objet d’un intérêt croissant, non seulement pour les applications mémoires avancées, photonique et photovoltaïque, mais également autour des matériaux dichalcogénures innovants à base de métaux de transition (MoS₂, WS₂, ..). Les propriétés de ces matériaux, réalisés sous forme d’alliages binaires ou ternaires, avec ou sans dopage, dépendent fortement de leur composition, du profil de composition dans ces couches très fines, ainsi que des conditions de surface et d’interface (préparation, passivation). La maîtrise des propriétés de ces couches fines, déposées par voie chimique (CVD) ou par co-pulvérisation cathodique magnétron, doit s’appuyer sur des nouveaux protocoles de caractérisation aux incertitudes optimisées et compatibles avec un contrôle de fabrication en ligne. Dans cette thèse, nous présentons les performances de protocoles de métrologie spécifiquement développés pour l’analyse de couches minces de chalcogénures. Ces protocoles, qui s’appuient essentiellement sur les techniques non destructives de spectroscopie de photoélectrons (XPS) et de fluorescence X (XRF), ont été optimisés pour la caractérisation surfacique des couches ultrafines, l’analyse quantitative de la composition des matériaux complexes à base de tellure ou de soufre, et la mesure du profil de composition dans des couches et empilements < 50 nm. Dans un premier temps, nous présentons l’étude par XPS quasi in situ des propriétés de surface des matériaux Ge, Sb, Te ainsi que de leurs composés binaires et ternaires. Nous mettons en évidence l’évolution de la surface après remise à l’air puis vieillissement, et nous comparons l’efficacité de stratégies d’encapsulation in situ de couches minces à base de Te et Se. Nous démontrons ensuite les performances de protocoles d’analyses par XRF à dispersion de longueur d’onde (WDXRF) et XPS pour la quantification précise de la composition chimique de composés Ge-Sb-Te (de 1 à 200 nm) et de couches ultrafines de dichalcogénures à base de métaux de transition (MoS₂, WS₂). L’analyse combinée WDXRF/XPS permet de mesurer l’évolution avec la composition des facteurs de sensibilité relative des composantes Ge3d, Te4d et Sb4d, et par conséquent d’améliorer la précision de mesure par XPS de la composition des matériaux à changement de phase de type GexSbyTez. Nous soulignons également l’influence des effets de matrice sur la capacité de la WDXRF à l’analyse quantitative de l’azote dans des matériaux Ge-Sb-Te. Nous évaluons la possibilité d’un étalonnage de la WDXRF fondé sur des analyses par faisceaux d’ions spécifiques, ce qui permet in fine un suivi en ligne de couches GeSbTeN dans une fenêtre procédé donnée. Enfin, nous présentons deux stratégies de caractérisation non destructive du profil de composition dans des couches minces de chalcogénures. D’une part, nous démontrons que la combinaison des techniques de XRF en géométrie d'incidence rasante (GIXRF) et de réflectométrie X (XRR) permet une mise en évidence non ambiguë de faibles… Advisors/Committee Members: Lépy, Marie-Christine (thesis director).

Subjects/Keywords: Chalcogénures; Métrologie des rayons-X; XRF; XPS; Mémoires; Matériaux 2-D; Chalcogenides; X-rays metrology; XRF; XPS; Memories; 2-D materials

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Batista Pessoa, W. (2018). Probing chalcogenide films by advanced X-ray metrology for the semiconductor industry : Développement des protocoles de métrologie des nouveaux matériaux chalcogénures pour l'industrie des semi-conducteurs. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2018SACLS330

Chicago Manual of Style (16^th Edition):

Batista Pessoa, Walter. “Probing chalcogenide films by advanced X-ray metrology for the semiconductor industry : Développement des protocoles de métrologie des nouveaux matériaux chalcogénures pour l'industrie des semi-conducteurs.” 2018. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed March 07, 2021. http://www.theses.fr/2018SACLS330.

MLA Handbook (7^th Edition):

Batista Pessoa, Walter. “Probing chalcogenide films by advanced X-ray metrology for the semiconductor industry : Développement des protocoles de métrologie des nouveaux matériaux chalcogénures pour l'industrie des semi-conducteurs.” 2018. Web. 07 Mar 2021.

Vancouver:

Batista Pessoa W. Probing chalcogenide films by advanced X-ray metrology for the semiconductor industry : Développement des protocoles de métrologie des nouveaux matériaux chalcogénures pour l'industrie des semi-conducteurs. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2018. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2018SACLS330.

Council of Science Editors:

Batista Pessoa W. Probing chalcogenide films by advanced X-ray metrology for the semiconductor industry : Développement des protocoles de métrologie des nouveaux matériaux chalcogénures pour l'industrie des semi-conducteurs. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2018. Available from: http://www.theses.fr/2018SACLS330

25. De Langhe, Kaatje. Beyond the beam : evaluation and application of handheld X-ray fluorescence in archaeology.

Degree: 2015, Ghent University

URL: http://hdl.handle.net/1854/LU-6715561

► The starting point of this project was to bridge the gap between the Departments of Analytical Chemistry and Archaeology. Archaeology has evolved from a more… (more)

▼ The starting point of this project was to bridge the gap between the Departments of Analytical Chemistry and Archaeology. Archaeology has evolved from a more historically and art-historically orientated field of research to a fully emancipated science, comfortably adopting GIS, 3D modelling and chemical analysis to serve its own needs. The rapidly evolving field of XRF (X-ray fluorescence) analysis and the development of a new generation of lightweight, high-performance handheld XRF analysers promised new possibilities for in situ elemental determination. The primary aim of this research project was to evaluate the applicability of such a handheld XRF analyser when used in archaeological contexts and to develop a comprehensible protocol for data-processing. To fulfil these objectives, the Olympus Innov-X handheld XRF analyser was obtained and characterised and a work methodology was developed applying established lab protocols used in analytical chemistry. This instrument was then employed in three archaeological case studies where it investigated respectively the provenance of post-medieval Flemish stove-tiles, the origin and distribution of Iron Age red-painted pottery from Mount Kemmel and related sites, and the geochemical composition of archaeological soil features in the Yustyd valley (Russia) during excavations in 2011. The research combined different XRF techniques, with a central role for handheld XRF spectrometry in all selected archaeological applications. In addition, the measurements of both µ-XRF (micro-XRF) and TXRF (Total Reflection XRF) were used to act as a point of reference for the handheld measurements, since reference materials for the archaeological materials under focus are not available, and Raman spectroscopy was used to characterize the pigment in the red-painted pottery. Methodology and characterization of handheld XRF analysers The first part of this thesis consists of three chapters which deal with X-ray fluorescence in general and the instrumentation and methodology that were used in this work. These chapters serve as an introduction to and point of reference for the rest of the thesis. Chapter 1 (Introduction) introduces the research and provides a broader context by placing it in the general evolution of XRF analysis in archaeology and by discussing current issues concerning the validity of handheld XRF. The chosen research strategy and the aims and objectives of this research are also discussed. Chapter 2 (Methodology) provides an overview of the instrumentation that was used in this research and the sample preparation and data processing techniques that were applied per instrument and project. The methodology is applicable to the three archaeological test cases. Chapter 3 (Evaluation of commercial handheld XRF: selecting the right tool for archaeological research) describes the evaluation of six commercially available handheld XRF analysers. The instruments are tested on their performance, stability and ease of use, using a set of standard reference materials and archaeological… Advisors/Committee Members: Vandenabeele, Peter, De Clercq, Wim, Vincze, Laszlo.

Subjects/Keywords: Chemistry; Altai; Kemmel; Flanders; red-painted pottery; stove-tiles; X-ray fluorescence; archaeology; µ-XRF spectroscopy; handheld XRF analysis; hXRF

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

De Langhe, K. (2015). Beyond the beam : evaluation and application of handheld X-ray fluorescence in archaeology. (Thesis). Ghent University. Retrieved from http://hdl.handle.net/1854/LU-6715561

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):

De Langhe, Kaatje. “Beyond the beam : evaluation and application of handheld X-ray fluorescence in archaeology.” 2015. Thesis, Ghent University. Accessed March 07, 2021. http://hdl.handle.net/1854/LU-6715561.

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

MLA Handbook (7^th Edition):

De Langhe, Kaatje. “Beyond the beam : evaluation and application of handheld X-ray fluorescence in archaeology.” 2015. Web. 07 Mar 2021.

Vancouver:

De Langhe K. Beyond the beam : evaluation and application of handheld X-ray fluorescence in archaeology. [Internet] [Thesis]. Ghent University; 2015. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1854/LU-6715561.

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

Council of Science Editors:

De Langhe K. Beyond the beam : evaluation and application of handheld X-ray fluorescence in archaeology. [Thesis]. Ghent University; 2015. Available from: http://hdl.handle.net/1854/LU-6715561

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

26. Mousavipak, Niloofar. Physico-chemical characterization of iranian turquoises : a tentative to trace middle-eastern turquoise-bearing artifacts : Caractérisations physico-chimiques de turquoises d'Iran : tentative de traçage d'artéfacts à turquoises moyenorientaux.

Degree: Docteur es, Gemmologie, 2020, Lyon

URL: http://www.theses.fr/2020LYSE1021

►

Cette étude a consisté en la comparaison de turquoises CuAl6(PO4)4(OH)8.4H2O de diverses mines historiques d'Iran (Perse) à celles d'autres localités régionales afin de trouver potentiellement… (more)

▼

Cette étude a consisté en la comparaison de turquoises CuAl6(PO4)4(OH)8.4H2O de diverses mines historiques d'Iran (Perse) à celles d'autres localités régionales afin de trouver potentiellement des caractéristiques discriminantes permettant d'identifier la provenance de bijoux ou d’artefacts à turquoise. Des échantillons de mines de turquoise ont été recueillis auprès de trois sources principales : Neyshapour, Damghan et Kerman et de couleur différente. De plus des bijoux à turquoise du Musée des Arts Décoratifs de Paris (MAD) ont également été analysé. Les spectroscopies vibrationnelles Raman et FTIR permettent toutes deux d'identifier la structure de la turquoise. Bien que FTIR ne montre pas de différences particulières entre les différentes couleurs de turquoise, les analyses Raman des échantillons de turquoise bleu et vert montrent que la largeur de ligne de l'échantillon bleu semble beaucoup plus résolue que celle du vert. Cela indique que le réseau et les modes de vibration OH et H2O sont sensibles aux substitutions induisant un désordre cristallin relatif. La spectroscopie d'absorption révèle que les turquoises avec la meilleure couleur bleue présentent une légère absorption de Fe3+. L'influence des ions cuivre divalents et du fer trivalent sur la couleur de la turquoise est expliquée. Selon les résultats d'absorption optique, Fe2+ n'a aucun effet particulier sur la couleur du turquoise ; la substitution Fe3+/Al change la couleur de la turquoise en une couleur verte. De plus, il a été démontré que les cartes élémentaires de spectroscopie de dégradation induite par micro laser (LIBS) permettent d'identifier rapidement les phases turquoise (Cu, Al et P corrélées) ainsi que celles de pyrite (FeS2) et de silicate. De légères interférences entre P, Al et Fe révèlent la légère substitution de Al par Fe.Des analyses chimiques non destructives réalisées par XRF, ont permis de quantifier les éléments majeurs (Al, P, Cu) et les éléments traces (Fe, Zn, As, Ca, Ti). Des analyses de corrélation et par ACP ont été menées en utilisant des données mesurées ainsi que des données bibliographiques. Les bijoux à turquoise du MAD se superposent aux domaines des turquoises de Neyshapour (Fe/Cu vs Zn/Cu; Zn/Cu vs As/Cu; Zn/Cu vs Ca/Cu). Par contre, les turquoises de Kerman ne correspondent pas, ainsi que les turquoises de Chine. Il est donc possible de suggérer que les turquoises des bijoux du MAD antérieures au 19e siècle étaient des turquoises d'origine persane

This study consists in the comparison of turquoise CuAl6 (PO4) 4 (OH) 8.4H2O from various historic mines in Iran (Persia) to those of other regional localities in order to potentially find discriminating characteristics making it possible to identify the origin of turquoise-bearing jewelry or artifacts. Turquoise mine samples were collected from three main sources: Neyshapour, Damghan and Kerman and of different colors. In addition, turquoise jewels from the Musée des Arts Décoratifs de Paris (MAD) were as well analyzed. Both Raman and FTIR vibrational spectroscopy…

Advisors/Committee Members: Panczer, Gérard (thesis director).

Subjects/Keywords: Turquoise; Iran; Absorption optique; Raman; FTIR; LIBS; XRF; Origine; Turquoise; Iran; Optical absorption; Raman; FTIR; LIBS; XRF; Origin; 620

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Mousavipak, N. (2020). Physico-chemical characterization of iranian turquoises : a tentative to trace middle-eastern turquoise-bearing artifacts : Caractérisations physico-chimiques de turquoises d'Iran : tentative de traçage d'artéfacts à turquoises moyenorientaux. (Doctoral Dissertation). Lyon. Retrieved from http://www.theses.fr/2020LYSE1021

Chicago Manual of Style (16^th Edition):

Mousavipak, Niloofar. “Physico-chemical characterization of iranian turquoises : a tentative to trace middle-eastern turquoise-bearing artifacts : Caractérisations physico-chimiques de turquoises d'Iran : tentative de traçage d'artéfacts à turquoises moyenorientaux.” 2020. Doctoral Dissertation, Lyon. Accessed March 07, 2021. http://www.theses.fr/2020LYSE1021.

MLA Handbook (7^th Edition):

Mousavipak, Niloofar. “Physico-chemical characterization of iranian turquoises : a tentative to trace middle-eastern turquoise-bearing artifacts : Caractérisations physico-chimiques de turquoises d'Iran : tentative de traçage d'artéfacts à turquoises moyenorientaux.” 2020. Web. 07 Mar 2021.

Vancouver:

Mousavipak N. Physico-chemical characterization of iranian turquoises : a tentative to trace middle-eastern turquoise-bearing artifacts : Caractérisations physico-chimiques de turquoises d'Iran : tentative de traçage d'artéfacts à turquoises moyenorientaux. [Internet] [Doctoral dissertation]. Lyon; 2020. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2020LYSE1021.

Council of Science Editors:

Mousavipak N. Physico-chemical characterization of iranian turquoises : a tentative to trace middle-eastern turquoise-bearing artifacts : Caractérisations physico-chimiques de turquoises d'Iran : tentative de traçage d'artéfacts à turquoises moyenorientaux. [Doctoral Dissertation]. Lyon; 2020. Available from: http://www.theses.fr/2020LYSE1021

Brno University of Technology

27. Uher, Tadeáš. Optimalizace tisku chemického kódu s XRF identifikací: Optimization of chemical code printing with XRF identification.

Degree: 2020, Brno University of Technology

URL: http://hdl.handle.net/11012/195168

► The Master’s thesis deals with study printing and optimization of a chemical labels with a code readable by XRF technique. The study is focusing on… (more)

Subjects/Keywords: XRF; chemické značky; chemický kód; tampónová tlač; ochranné prvky; XRF; chemical labels; chemical code; pad printing; protective tags

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Uher, T. (2020). Optimalizace tisku chemického kódu s XRF identifikací: Optimization of chemical code printing with XRF identification. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/195168

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):

Uher, Tadeáš. “Optimalizace tisku chemického kódu s XRF identifikací: Optimization of chemical code printing with XRF identification.” 2020. Thesis, Brno University of Technology. Accessed March 07, 2021. http://hdl.handle.net/11012/195168.

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

MLA Handbook (7^th Edition):

Uher, Tadeáš. “Optimalizace tisku chemického kódu s XRF identifikací: Optimization of chemical code printing with XRF identification.” 2020. Web. 07 Mar 2021.

Vancouver:

Uher T. Optimalizace tisku chemického kódu s XRF identifikací: Optimization of chemical code printing with XRF identification. [Internet] [Thesis]. Brno University of Technology; 2020. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11012/195168.

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

Council of Science Editors:

Uher T. Optimalizace tisku chemického kódu s XRF identifikací: Optimization of chemical code printing with XRF identification. [Thesis]. Brno University of Technology; 2020. Available from: http://hdl.handle.net/11012/195168

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

Universiteit Utrecht

28. Olivier, N.J. Characterization of the spatial distribution of iron- and manganese oxides in the Sterksel Formation at the Maalbeek quarry, The Netherlands.

Degree: 2012, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/257677

► Iron and manganese oxides are common components in subsurface environments. They influence the groundwater flow, sediment chemistry and contaminant transport. The oxides can form coatings… (more)

▼ Iron and manganese oxides are common components in subsurface environments. They influence the groundwater flow, sediment chemistry and contaminant transport. The oxides can form coatings on the surface of sand particles and thereby provide a reactive interface between mineral grains and groundwater. Concentrations of iron and manganese oxides can be very high in sediments. Because of their adsorption capacity, naturally occurring iron- and manganese-bearing phases are known to strongly influence the transfer of inorganic species and ionizable organic compounds. This project has focused on the spatial distribution and concentration of iron oxides and total iron in the Sterksel Formation. This formation was deposited by the Rhine during the colder intervals in the middle Pleistocene. The studied site is the Maalbeek quarry in Limburg. At this site, the formation consists mostly of coarse sand and pebbles, and has a highly heterogeneous distribution of iron and manganese. This study is aimed to characterize the spatial distribution of iron and manganese within the sediment at this quarry. Three different methods have been used to quantify the concentration of iron and other components. The Citrate- Bicarbonate Dithionite method was used to extract the reactive iron from the sediment. Ingestion with aqua regia was used to extract acid soluble iron, manganese and other metals from the sediment. Measurements with XRF were done to get a view on the total composition of the sediment. The outer layer of coating of the grains was mainly measured. In general, enrichment in oxides is in the lower parts of the formation. Manganese oxides are very locally enriched in thin layers and are in a range of 5.42 ppm to 589 ppm manganese. Reactive iron concentrations were measured in the range from 139 to 3000 ppm, and total iron concentrations range from 515 to 515 to 71000 ppm. It is argued that the actual reactive iron concentration should in many cases be higher than measured here. Possible reasons for the low concentrations are shortage of reagents, incomplete dissolution due to crystallinity of oxides and degradation of dithionite. The iron measured by XRF is in the range of 1335 to 12406 ppm. This is a higher value than the aqua regia measured iron because mainly the coating was measured and not the entire sand grains. An overestimation might occur here because the lighter elements are underestimated relative to the heavier elements. The total iron distribution has a lognormal distribution and the reactive and XRF-measured iron has a bimodal distribution. There is a weak correlation between iron and manganese, a reason could be that manganese has a very local enrichment compared to iron. There is a strong iron-titanium correlation, suggesting presence of ilmenite in the sediment. Iron-silicon measured by XRF has a negative correlation; this could be because the iron oxides form coatings around the grains. The distinguish between reactive and non-reactive iron was estimated with theFe2O3/Al2O3 ratio and by comparing the iron… Advisors/Committee Members: Behrends, T, Griffioen, J.

Subjects/Keywords: Geowetenschappen; iron, manganese, geostatistics, aqua regia, XRF, CBD method

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Olivier, N. J. (2012). Characterization of the spatial distribution of iron- and manganese oxides in the Sterksel Formation at the Maalbeek quarry, The Netherlands. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/257677

Chicago Manual of Style (16^th Edition):

Olivier, N J. “Characterization of the spatial distribution of iron- and manganese oxides in the Sterksel Formation at the Maalbeek quarry, The Netherlands.” 2012. Masters Thesis, Universiteit Utrecht. Accessed March 07, 2021. http://dspace.library.uu.nl:8080/handle/1874/257677.

MLA Handbook (7^th Edition):

Olivier, N J. “Characterization of the spatial distribution of iron- and manganese oxides in the Sterksel Formation at the Maalbeek quarry, The Netherlands.” 2012. Web. 07 Mar 2021.

Vancouver:

Olivier NJ. Characterization of the spatial distribution of iron- and manganese oxides in the Sterksel Formation at the Maalbeek quarry, The Netherlands. [Internet] [Masters thesis]. Universiteit Utrecht; 2012. [cited 2021 Mar 07]. Available from: http://dspace.library.uu.nl:8080/handle/1874/257677.

Council of Science Editors:

Olivier NJ. Characterization of the spatial distribution of iron- and manganese oxides in the Sterksel Formation at the Maalbeek quarry, The Netherlands. [Masters Thesis]. Universiteit Utrecht; 2012. Available from: http://dspace.library.uu.nl:8080/handle/1874/257677

Universiteit Utrecht

29. Jansen, S. X-ray fluorescence microanalysis Instrumental capabilities and application to Archaean cherts.

Degree: 2010, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/179374

► This thesis describes the results of an analytical study into µ-XRF spectroscopy and capabilities of the technique, aimed at applications in geological research. Background, principles… (more)

▼ This thesis describes the results of an analytical study into µ-XRF spectroscopy and capabilities of the technique, aimed at applications in geological research. Background, principles and a brief history of XRF spectrometry are explained, a theoretical account is given of the interaction between X-rays and target material, and the components needed for XRF application on micro-scale are described. Tests were performed to explore parameter settings of the instrument that would yield optimum results for various analytical purposes. The results indicate that (1) an amplifier time of 6.4 µs produces optimum peak resolution for qualitative analysis, (2) voltages of 20-30 keV and currents up to 600 µA are most suitable for qualitative analysis, (3) reproducible data can be obtained for quantitative analysis, (4) software provided by the manufacturer and a standardless approach are inadequate for obtaining quantitative results with an accuracy that many geological research questions demand. Tests on international geological reference materials with known compositions showed deviations from accepted values between 0.5 and 22% for major and minor elements. Using the optimized parameter settings, µ-XRF analyses were performed on two different types of color-banded Archaean chert. One was supposedly deposited as a chemical precipitate in a marine-hydrothermal environment. Individual, up to several cm thick layers showed clear compositional contrasts. Red and black layers were iron-rich, while white, pink or orange layers contained abundant silicon. Quantitative analyses, carried out with a 2-mm spot size, yielded ca. 60 wt% SiO2 and 30 wt% Fe2O3 for the dark group of layers, and ca. 88 wt% SiO2 and virtually no iron for the pale group. The measurements showed MnO concentrations up to ~0.15 wt% in the red layers and the existence of a clear stratigraphic trend in Fe/Mn ratios of individual layers. Findings support the hypothesis that hydrothermal activity played a major role in the supply of Si, Fe and Mn. Hence, it is inferred that color-banding reflects changes in the vigor of hydrothermal activity. A second analyzed sample is a color-banded “silicified precursor chert”, which represents a volcaniclastic sediment that became silicified by interaction with silica-saturated seawater. Qualitative µ-XRF results pointed to the presence of quartz, Fe-bearing sericite and some rutile. In this case, color differences were attributable to subtle mineralogical variations, possibly reflecting original changes in sediment supply. This thesis includes a recommended work routine as manual for µ-XRF analysis, meant to serve future users. Advisors/Committee Members: Bergen, M.J. van.

Subjects/Keywords: Geowetenschappen; Micro-XRF, x-ray fluorescence, Archaean cherts

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Jansen, S. (2010). X-ray fluorescence microanalysis Instrumental capabilities and application to Archaean cherts. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/179374

Chicago Manual of Style (16^th Edition):

Jansen, S. “X-ray fluorescence microanalysis Instrumental capabilities and application to Archaean cherts.” 2010. Masters Thesis, Universiteit Utrecht. Accessed March 07, 2021. http://dspace.library.uu.nl:8080/handle/1874/179374.

MLA Handbook (7^th Edition):

Jansen, S. “X-ray fluorescence microanalysis Instrumental capabilities and application to Archaean cherts.” 2010. Web. 07 Mar 2021.

Vancouver:

Jansen S. X-ray fluorescence microanalysis Instrumental capabilities and application to Archaean cherts. [Internet] [Masters thesis]. Universiteit Utrecht; 2010. [cited 2021 Mar 07]. Available from: http://dspace.library.uu.nl:8080/handle/1874/179374.

Council of Science Editors:

Jansen S. X-ray fluorescence microanalysis Instrumental capabilities and application to Archaean cherts. [Masters Thesis]. Universiteit Utrecht; 2010. Available from: http://dspace.library.uu.nl:8080/handle/1874/179374

Rochester Institute of Technology

30. Miller, Neil. Implementing field portable x-ray fluorescence during environmental investigations for radioactive materials.

Degree: Civil Engineering Technology Environmental Management and Safety (CAST), 2011, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/701

► During sampling or remediation of radiologically contaminated sites quantitative results are needed to determine where to sample or where to excavate soils. Although some portable… (more)

▼ During sampling or remediation of radiologically contaminated sites quantitative results are needed to determine where to sample or where to excavate soils. Although some portable gamma spectroscopy equipment does exist for field identification of radionuclides, they are not commonly used during remedial investigations. The current, and very common, process for sampling involves scanning soil with field portable gross measuring radiation detectors (i.e. Sodium Iodide, Scintillation, etc) that measure counts per minute of ionizing radiation; this does not give any information on the nuclides present or their concentrations in the soil. Samples are then collected at biased locations, based on the results of the field detectors, and sent to an on-site or off-site laboratory for analysis (i.e. gamma-spectroscopy, alpha-spectroscopy, etc) to determine what nuclides are in the soil and quantitate their concentration. If an on-site laboratory is not used it may take a few weeks to receive data back from off-site analysis, which inhibits real-time decision making while sampling and adds costs to a project. One potential method to determine real-time concentrations of metals in soil is through the use of a field portable x-ray fluorescence (XRF) device. This thesis will examine the relationship between laboratory isotopic thorium and uranium to XRF results of elemental uranium and thorium which are contaminants of concern found at Formally Utilized Remedial Action Program (FUSRAP) sites. The FUSRAP properties were contaminated during the United States early atomic weapons era and are being remediated by the United States Army Corps of Engineers (USACE) as part of a federal remediation program. Both thorium and uranium are radioactive metals that will be investigated to determine if XRF devices can detect their presence at environmental levels of significance to assist in the investigation and remediation of future FUSRAP projects. Advisors/Committee Members: Schneider, Jennifer.

Subjects/Keywords: Environmental investigation; Radioactive material; Thorium; Uranium; X-ray fluorescence; XRF

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Miller, N. (2011). Implementing field portable x-ray fluorescence during environmental investigations for radioactive materials. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/701

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):

Miller, Neil. “Implementing field portable x-ray fluorescence during environmental investigations for radioactive materials.” 2011. Thesis, Rochester Institute of Technology. Accessed March 07, 2021. https://scholarworks.rit.edu/theses/701.

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

MLA Handbook (7^th Edition):

Miller, Neil. “Implementing field portable x-ray fluorescence during environmental investigations for radioactive materials.” 2011. Web. 07 Mar 2021.

Vancouver:

Miller N. Implementing field portable x-ray fluorescence during environmental investigations for radioactive materials. [Internet] [Thesis]. Rochester Institute of Technology; 2011. [cited 2021 Mar 07]. Available from: https://scholarworks.rit.edu/theses/701.

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

Council of Science Editors:

Miller N. Implementing field portable x-ray fluorescence during environmental investigations for radioactive materials. [Thesis]. Rochester Institute of Technology; 2011. Available from: https://scholarworks.rit.edu/theses/701

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

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations