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Dissertations / Theses on the topic 'XRF Analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Mahuteau, Laurent. "Study of algorithms for analysis of xrf spectra to automate inspection of carpets." Thesis, Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26625.

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The objective of this thesis is to categorize carpet types according to their XRF spectra and verify if further classification of carpets is possible for use of an XRF analysis system in the carpet manufacturing line. This thesis consists of (1) implementing and studying effective algorithms for automated analysis of X-ray spectra, (2) comparing known algorithms for X-ray spectra analysis, and (3) implementing our own algorithm for classification of carpets spectra obtained for further fluorine online analysis of XRF inspected carpets. This research is intended for quick and accurate automated

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2

Botteon, Alessandra <1987&gt. "MA-XRF analysis on paintings and physico-chemical characterization of smalt." Master's Degree Thesis, Università Ca' Foscari Venezia, 2013. http://hdl.handle.net/10579/2340.

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The aim of this research was, on the one hand, the investigation of two paintings using a mobile scanning macro-XRF systems (MA-XRF) while, on the other hand, a chemical-physical characterization of smalt, a blue potash glass pigment containing cobalt that is present in the two paintings,, was carried out. For this purpose, scanning electron microscopy coupled to an energy dispersive X-Ray spectrometer (SEM-EDS) and X-ray absorption near-edge spectroscopy with synchrotron radiation as source (SR-XANES) measurements were performed. Two paintings, Ritratto di Michelangelo attributed to S. del

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ORSILLI, JACOPO. "AR-XRF Techniques for the Analysis of Cultural Heritage layered samples." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2023. https://hdl.handle.net/10281/403656.

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L’analisi scientifica è da un po’ di tempo entrata nel mondo dei beni culturali, non sono più solo gli archeologi e gli storici dell’arte a occuparsi dello studio dei reperti archeologici e storici, ma anche gli scienziati sono entrati a gamba tesa portando le loro conoscenze al servizio di questa vasta gamma di materiali. Lo studio di reperti botanici e zoologici, le competenze chimiche e mineralogiche, lo studio di fenomeni fisici, ha permesso di porre e rispondere a nuove domande, colmando così lacune sulla storia dell’umanità. Reti commerciali, migrazioni, tecniche produttive, molte sono s

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PEREIRA, JEAN MICHEL DA SILVA. "METEORITE ANALYSIS BY MASS SPECTROMETRY (252CF-PDMS) AND BY X-RAY AND INFRARED SPECTROSCOPIES (XRD, XRF, PIXE, FTIR AND RAMAN)." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=25645@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>A pesquisa em meteoritos é de extrema importância para o entendimento de certos processos astrofísicos, pois estes objetos trazem em sua estrutura informações fundamentais para a compreensão da evolução do Sistema Solar. Neste trabalho, são estudadas amostras dos meteoritos Isna, Allende e Zagami. As técnicas analíticas utilizadas foram: espectrometria de massa (252Cf-PDMS-TOF), espectroscopia vibracional (FTIR-MIR e Raman) e espectroscopias de raios X (XRF, XRD e PIXE). Além

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Fraser, Sharon Elizabeth. "EPMA, XRF and LA-ICP-MS analysis of archaeological artifacts : applications to provenancing." Thesis, University of Manchester, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546585.

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Chemical data obtained through LA-ICP-MS, EPMA and XRF analysis have been used to investigate the potential for provenancing archaeological.artefacts. By combining chemical analysis with multivariate statistical analysis (pCA and cluster analysis) a more robust and objective method of classification and provenancing can be obtained. Modem glass bottles were used as an analogue for Islamic Bahraini glass samples, to test the application ofXRF analysis. For the modem glass samples which were homogeneous, with the chemistry being tightly controlled during manufacture and were free from alteration

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Kronborg, Pelle. "Identifying Quaternary Climate Change with XRF Analysis on Loess From South-Western England." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-412179.

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Huge changes in climate occurred at the end of the last Quaternary glaciation. The end of this glaciation corresponds with the end of Pleistocene with its repeated glacial cycles and the start of the current geological epoch, the Holocene interglacial. The climate at this time was characterized by increasing temperatures and an increase in rainfall. This project focuses on understanding and examining these changes in climate using loess deposits from south-western England. Loess is an aeolian sediment and covers around 10 % of the Earth’s land surface and these deposits are excellent archives

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Andersson, Hanna. "Reconstructing Weathering and Climate Trends on Loess Deposits in NW France Using XRF Analysis." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445601.

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Analyzing climate changes by loess sediment deposits formed after the last glacial maximum gives us information about how the environment was dynamically before humans physically could record climate changes. Sampling and analyzing loess from different places in the world give us a more reliable view of when events and changes in climate took place. Loess is a last step eolian transported, fine grained sediment and can be a good record as a Quaternary climate archive (Muhs 2013; Stevens et al. 2020). Loess-paleosol sequences can be used as a relative record for climate change. The paleosols in

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Karnik, Isabelle. "Arctic Loess as an Environmental Archive : Identifying Weathering with XRF Analysis in West Greenland." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-394290.

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Loess from west Greenland was studied to evaluate Holocene paleoclimate in the Arctic region. Deposits of loess are formed over long time scales through deposition of fine aeolian sediment and they exist in several places in the world. The main aeolian dust source in the study area is glaciofluvial material derived from the Greenland Ice Sheet (GrIS). Studying and understanding paleoclimate can help to make better predictions about the future in this sensitive region. Apart from sea level rise, melting of the GrIS also leads to an increase of aeolian dust as it gets released from the ice, whic

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Engström, Johansson Alexandra. "Using Bulk XRF-Analysis of Chinese Loess to Determine High-Resolution Records of Dust Provenance." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-317881.

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Understanding the sources of the dust that forms the extensive loess deposits on the Chinese Loess Plateau is crucial for reconstructing atmospheric circulation patterns and dust pathways. Dust sources are however highly debated, mainly due to the low resolution of many records and the often ambiguous nature of geochemical proxies. The widely used concept of elemental ratios as provenance indicators is based on the idea that the relative abundance of immobile elements remains unaffected by chemical weathering, thereby preserving source signals. High-resolution spatial and temporal records of l

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Lins, Sergio Augusto Barcellos. "Multispectral analysis of Nuragic metallic samples (Sardinia, Italy)." Master's thesis, Universidade de Évora, 2018. http://hdl.handle.net/10174/27727.

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ABSTRACT: In this investigation, a protocol combining the use of Monte Carlo simulations together with energy-dispersive X-ray fluorescence (ED-XRF) analysis was used to determine the chemical composition of a set of nine objects from a private collection, apprehended by Carabinieri and without archaeological context. The artefacts are thought to belong to the nuragic period from Sardinia, Italy. The protocol employed is a powerful and non-destructive method useful for cultural heritage applications where usually no sampling is allowed and was applied here with the objective of attesting the a

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Dunster, Joanna Margaret. "Developing a methodology for the non-destructive analysis of British soft-paste porcelain." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/12766.

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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 a product that would survive high-temperature firing, a range of paste recipes was employed by dozens of factories. This has resulted in an array of porcelains which vary in their elemental composition and mineralogy. This research carries out a meta-analysis of the published data for porcelain bodies and glazes and concludes that some discrimination can be achieved using the major and minor elemental composition of the bodie

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Hobbs, Jeremy. "Traces of the Past : XRF analysis of soils samples from a medieval churchyard in Sigtuna, Sweden." Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-182689.

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Sigtuna is one of the first settlements in Sweden considered to be a proper town. Taking over Birka´s function as a central trading hub when it was founded in the late 10th century AD, Sigtuna was characterized by its early connection to Christianity, and many churches were built there. The foundations of one of these medieval stone churches and its churchyard lie beneath Sigtuna museum’s plot on the block S: t Gertrud 3. However, the full extent of this church and churchyard as well as its foundation date and function is not fully known. The over-arching purpose of this study is to achieve a

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Caliri, Claudia. "A mobile xrf scanner for a real-time elemental imaging of painted artworks." Doctoral thesis, Università di Catania, 2017. http://hdl.handle.net/10761/3771.

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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

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Inman, Malcolm S. "Pollution biomonitoring in the Delamere Forest, N. Cheshire by XRF analysis of Scots Pine (P. sylvestris L.)." Thesis, University of Wolverhampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271283.

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Chlorosis and premature loss of pine needles was observed in the Delamere Forest, N. Cheshire in late 1992. Fears that the local environment had suffered, and was continuing to suffer, from acid rain or mist 'episodes' as a result of airborne pollutants, led to an analysis of pine needles for total foliar element concentrations in early 1994. Analysis by X-ray Fluorescence Analysis (XRF) revealed levels of foliar sulphur (0.35%) and chloride (0.32%) that suggested deposition of these chemicals as a result of emissions from nearby sources, including a local power station , Ince 'B', a scenario

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Wang, Momo. "Multi-analysis of the Wood Painting "Polyptych of the Virgin" by Antonio Vivarini and Stefano da Sant' Agnese in Church of San Zaccaria." Master's thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/31197.

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Introduction: The Polyptych of the Virgin studied by this thesis, is composed of five tempera paintings. They’re painted by two different artists, Antonio Vivarini and Stefano da Sant’Agnese. Currently, this Polyptych of the Virgin has been commissioned by ICR for restoration. In so far, there have been no attempts to analyze this “Polyptych of the Virgin.” Therefore, the scientific results can help understand the artist’s techniques and the material used to understand the paintings better. In this thesis, the objects will be studied mainly by image analysis (IR\UV\radiographic) and in-situ XR

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Canezaro, Morgan Elise. "Magnetic Susceptibility and XRF Analysis of Soils from Baton Rouge, Louisiana| Correlation and Implications for Heavy Metal Pollution." Thesis, University of Louisiana at Lafayette, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10816477.

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<p>Canezaro, Morgan Elise. Bachelor of Science, University of Louisiana at Lafayette, Fall 2015; Master of Science, University of Louisiana at Lafayette, Spring 2018 Major: Geology Title of Thesis: Magnetic Susceptibility and XRF Analysis of Soils from Baton Rouge, Louisiana: Correlation and Implications for Heavy Metal Pollution Thesis Director: Dr. Carl Richter Pages in Thesis: 107; Words in Abstract: 300 Abstract Magnetic properties such as magnetic susceptibility (MS) and saturation isothermal remanent magnetization (SIRM) have been used in numerous studies to detect and monitor anthropoge

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Sokoltsova, Tetiana. "Development of a standardless miniature XRF setup for the analysis of actinides : coupling MC methods with fundamental parameters." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASP018.

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La fluorescence des rayons X (XRF) est un outil analytique qualitatif et quantitatif pour la caractérisation élémentaire de nombreux types de matériaux ; elle est non destructive, rapide et convient à l'analyse d'une large gamme d'éléments. La méthode est basée sur l'excitation d'un analyte par un faisceau primaire de rayons X qui induit l'émission de la fluorescence X de l'échantillon. L'objectif de l'analyse quantitative par fluorescence X est d’établir la relation entre la concentration des éléments avec les intensités de fluorescence mesurées. Cependant, cette tâche n'est pas simple puisqu

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Bachor, Susan. "TRADE AND EXCHANGE OF STEATITE, 3000 BC-750 BC, IN THE SUSQUEHANNA AND DELAWARE RIVER WATERSHEDS OF PENNSYLVANIA." Master's thesis, Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/480723.

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Anthropology<br>M.A.<br>Trade and exchange of Steatite in the Susquehanna and Delaware river watersheds becomes more visible in the archaeological record approximately 3000 BC. This study will examine procurement and consumption of steatite bowls within the above watersheds of Pennsylvania between 3000 BC to 750 BC. Looking at the distribution of steatite sites in comparison to the distance from the quarry locations has enabled us to examine the trade and exchange model being utilized to acquire this material. The two models that are applicable to this region are direct procurement and down-th

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Castilho, Priscila Resmer. "Estudo da aplicação da técnica de ED-XRF para caracterização elementar de tecidos mamários." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/969.

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CAPES<br>O câncer de mama deve atingir cerca de 57.120 novos pacientes no Brasil em 2014, como divulgado pelo serviço de epidemiologia do Instituto Nacional de Câncer. Pesquisadores têm associado neoplasias mamárias às alterações nas concentrações de alguns elementos no tecido da mama, tais como: cálcio, ferro, cobre e zinco. Neste sentido a técnica de espectroscopia por fluorescência de raios X surge como uma ferramenta para caracterização elementar deste tipo de tecido. A eficácia da referida técnica é fortemente dependente do espectro de raios X incidente na amostra, bem como do procediment

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Wurster, Bethany M. "A Geochemical Analysis of Tosawihi Quarries Chert Using X-Ray Fluorescence Spectrometry." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7526.

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Lithic source analysis, or “sourcing,” is a geochemical compositional analysis of lithic materials for both major and trace elements. Sourcing analysis assigns lithic sources to geochemical groups according to distinct geochemical compositions, where unique elemental signatures represent separate lithic sources. In archaeological research, sourcing informs upon mobility strategies, trade and exchange networks, and lithic conveyance studies. While obsidian sourcing is a relatively reliable and popular technique, chert sourcing is more difficult and historically less successful largely due to va

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CHEN, CHIN KWANG. "AN EVALUATION OF THE INFLUENCE OF ADJACENT ACTIVITIES ON THE AIR LEAD CONCENTRATION DURING LEAD ABATEMENT TASKS AND AN EVALUATION OF LEVELS OF LEAD IN PAINT IN EXISTING HOUSING AND IN NEW PAINTS IN SINGAPORE." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1099534543.

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Al, Razzaz Salim. "Soil Analysis for samples from the hill-fort of Hedeby." Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-118399.

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Hedeby Hochburg, borgen i Hedeby, har fått förhållandevis lite uppmärksamhet, jämfört med själva samhället i Hedeby. Utgrävningen från 2012 har dock väckt ett intresse, med ett antal frågor som behöver besvaras. I denna uppsats analyseras jordprover som samlats under utgrävningen, för att se om de kan visa något om den kronologiska relationen mellan borgvallen och gravarna i borgen. Tre metoder användes, FTIR (Fourier Transform Infrared Spectroscopy), röntgendiffraktion (XRD) och röntgenfluorescens (XRF). Resultaten från XRF och XRD visar på en rumslig relation mellan minst en av vallens konst

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Phillips, Stephen Paul. "Discriminant Analysis of XRF Data from Sandstones of Like Facies and Appearance: A Method for Identifying a Regional Unconformity, Paleotopography,and Diagenetic Histories." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3373.

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The placement of an unconformable surface within a stratal succession affects the interpreted thickness of units and sequences in contact with that surface. Unit thickness influences the interpretation of basin subsidence, paleotopography, diagenesis, and depositional style. Accurate placement of an unconformity results in true formational thicknesses for formations associated with that unconformity. True thicknesses aid in producing more precise surface to subsurface correlations, isopach maps, and paleogeographic maps. An unconformity may be difficult to identify in the stratal succession du

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Gullayanon, Rutchanee. "A calibration methodology for energy dispersive X-ray fluorescence measurements based upon synthetically generated reference spectra." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42771.

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This research developed an on-line measurement systemfor determining the amount of fluorochemicals on carpet fibers using energy-dispersive X-ray fluorescence (EDXRF).This system is designed as a complementary tool to an existingchemical burn test certified by the American Association ofTextile Chemists and Colorists (AATCC), which is performed off-line on randomly selected carpet samples and time consuming.This research reviewed XRF principles and determined parameters that affect XRF spectra such as measurement time, measurement number, X-ray tube voltage, X-ray tube current, primary beam fi

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Little, David A. "Geochemical Comparison of Ancient and Modern Eolian Dune Foresets Using Principal Components Analysis." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6187.

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Geochemistry has been used to determine the provenance and diagenetic history of eolian sandstone deposits. However, the grain size, sorting, cementation, and detrital composition of eolian units can change along dune foreset laminae. The purpose of this study was to test for consistent trends of compositional change along dune foresets. Such trends could increase the quality of geochemical sampling of eolian sandstones and possibly aid in estimating the original height of ancient sand dunes. XRF data was gathered for both major and trace elements from the Pennsylvanian to Permian Weber Sa

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Tamakloe, Frank. "A JOINT XRF-δ¹³C_carb CHEMOSTRATIGRAPHIC APPROACH FOR CHARACTERIZING PALEO-ENVIRONMENTAL PROCESSES IN THE MUDSTONE-DOMINATED WOLFCAMP FORMATION OF WEST TEXAS". UKnowledge, 2019. https://uknowledge.uky.edu/ees_etds/69.

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The Late Paleozoic Ice Age represents a dynamic period in Earth system history recording a shift from icehouse to greenhouse conditions. Concomitant with this change was a series high-frequency, high-amplitude sea level fluctuations leading to the deposition of “Kansas type” cyclothems in the Mid-Continent, and a similar rhythmic expression of interbedded shales and carbonates in the Midland Basin. Stable isotope geochemistry is a particularly powerful tool when examining these mud-rich successions because changes in organic matter partitioning may be recorded first in δ13CDIC of sea-water and

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Karap, Vandana. "Preliminary Assessment: Identification of Chinese Drywall and Exposure to Particulate Matter and Metals during Cutting and Installation of Drywall." ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/1321.

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Drywall, a popular building material made of gypsum based plaster sandwiched between two thick sheets of paper is used for building interior walls, is speedier alternative to traditional plaster, decreasing time and labor for construction. Importance of drywall increased with the demand for drywall after nine hurricanes hit Florida in 2004-05 and widespread damage caused in the Gulf Coast after Katrina in 2005. This study has two parts. First part presents an analysis of metals like strontium for the identification of Chinese drywall, and a comparison of strontium concentrations of American dr

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Bailey, Carlynne. "Comparative Study of the Chemostratigraphic and Petrophysical characteristics of Wells A-A1, A-L1, A-U1 and A-I1 in the Orange Basin, South Atlantic Margin, Offshore South Africa." Thesis, University of the Western Cape, 2009. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_1427_1282897265.

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<p>Many hydrocarbon reservoirs are situated in barren sequences that display poor stratigraphic control. Correlation between the wells can become extremely difficult and traditional correlation techniques can prove to be inadequate. Past studies have shown that trace and major element concentrations can be used as a correlation tool. This practice of using geochemical fingerprints to characterize between wells is called Chemostratigraphic analysis. (Pearce et al, 1999) Chemostratigraphy has been recognized as a very important correlation technique as it can be used for rocks of any age, in any

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Puyuelo, valdes Pilar. "Laser-driven ion acceleration with high-density gas-jet targets and application to elemental analysis." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0134.

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Cette thèse en cotutelle entre la France et le Canada étudie l’accélération d’ions dans l’interaction laser-plasma. La première partie, réalisée au CENBG et sur l’installation PICO2000 du laboratoire LULI à l'École Polytechnique de Palaiseau, présente des études expérimentales, complétées par des simulations numériques de type Particle-In-Cell, portant sur l’accélération d’ions dans l'interaction d'un laser infrarouge de haute puissance avec une cible gazeuse de haute densité. La seconde, réalisée avec le laser ALLS de l’institut EMT INRS, concerne le développement d'une application des faisce

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Klekner, Martin. "Aplikace analytických metod využívajících RTG záření v oblasti analýz stavebních materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225574.

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Master’s thesis mainly deals with XRF analysis of building materials. Comprehensively analyzes the factors that limit the accuracy of the obtained data, creates a new methodology for the rapid analysis of silicate materials by XRF instrument and discusses the influences determining the reproducibility of the results of XRF analysis.

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Goy, Julie. "La métallurgie du cuivre à l'âge du Fer en péninsule d'Oman : organisations et caractéristiques techniques." Thesis, Paris 1, 2019. http://www.theses.fr/2019PA01H063.

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La péninsule d’Oman est une entité géo-culturelle qui s’organise autour des montagnes d’al-Hajjar, extrêmement riches en minerais de cuivre. Ce dernier a probablement été exploité dès la période Hafit (3000 - 2500 av.n.è.) et le métal produit deviendra une matière d’échange avec la Mésopotamie à la période Umm an-Nar (2500 - 1900 av.n.è.). À l’âge du Fer (1350 - 300 av.n.è.), ces échanges deviennent plus flous, mais la production de cuivre elle, ne diminue pas. Les sites de réduction et de travail du métal de la péninsule d’Oman sont extrêmement massifs et fonctionnent à l’aide d’une gestion e

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Jantzi, Sarah C. "Elemental Analysis and Forensic Comparison of Soils by Laser-Induced Breakdown Spectroscopy (LIBS) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS)." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/967.

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The elemental analysis of soil is useful in forensic and environmental sciences. Methods were developed and optimized for two laser-based multi-element analysis techniques: laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and laser-induced breakdown spectroscopy (LIBS). This work represents the first use of a 266 nm laser for forensic soil analysis by LIBS. Sample preparation methods were developed and optimized for a variety of sample types, including pellets for large bulk soil specimens (470 mg) and sediment-laden filters (47 mg), and tape-mounting for small transfer

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Santos, Joelmir dos. "Avaliação e aplicação de metodologia da técnica espectrométrica de fluorescência de raios X por reflexão total (TXRF) na caracterização multielementar em particulados sólidos de amostras ambientais." Universidade Estadual do Oeste do Paraná, 2016. http://tede.unioeste.br/handle/tede/3571.

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Submitted by Marilene Donadel (marilene.donadel@unioeste.br) on 2018-04-25T00:28:56Z No. of bitstreams: 1 Joelmir_Santos_2016.pdf: 3759768 bytes, checksum: 953ccb765b5bea358bd87b6b493ab5cb (MD5)<br>Made available in DSpace on 2018-04-25T00:28:56Z (GMT). No. of bitstreams: 1 Joelmir_Santos_2016.pdf: 3759768 bytes, checksum: 953ccb765b5bea358bd87b6b493ab5cb (MD5) Previous issue date: 2016-02-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>This study aimed the evaluation and application of methodology for multielement analyses by total reflection X-ray fluorescence

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Mori, Eva Kaiser. "Caracterização de pinturas do artista Alfredo Volpi por meio de métodos não destrutivos: espectrofotômetro, EDXRF, MEV e imageamento multiespectral." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/44/44144/tde-17112015-151200/.

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Alfredo Volpi (1896 - 1988) é um dos mais importantes pintores brasileiros contemporâneos. Sua extensa obra foi marcada, principalmente, por composições cromáticas e abstrações geométricas. Foi um artista que dava importância muito grande à técnica e aos materiais, tendo desenvolvido uma maneira própria e sistemática de trabalhar: confeccionava suas próprias telas, tintas e até pigmentos, com terras naturais. Analisou-se ao todo 11 pinturas a têmpera em diversos suportes (tela, aglomerado de madeira e mural), 10 delas realizadas na década de 1950, período em que a obra do artista passou

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Musco, M. E. "Palaeo-ice stream dynamics in the North-western Barents Sea depicted from clay mineral analyses." Doctoral thesis, Università di Siena, 2019. http://hdl.handle.net/11365/1074888.

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The Arctic Ocean is one of the most climatically vulnerable areas on the planet, being a crossway of oceanic circulation. The study of high latitude continental margin sediments is useful for understanding past ice sheet dynamics history and its influence on climate changes. This PhD project focuses on the sedimentation history along the North-western Barents Sea continental margin from the Marine Isotope Stage (MIS) 3 to the Holocene. During the Last Glacial Maximum (LGM), around 21.000 years ago, this area was covered by the Svalbard-Barents Sea Ice sheet (SBSIS). The sedimentary record cont

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Fadden, A. J. "Structural and functional analysis of the XPF/Mus81 family of endonucleases." Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1445433/.

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This thesis describes structural and functional analysis of members of the XPF/Mus81 family of junction-specific endonucleases. These enzymes recognise and nick double-stranded DNA within a variety of flaps, bubbles and branched DNA substrates. Genetic and biochemical evidence indicates that these endonucleases have important functions in nucleotide excision repair, DNA interstrand crosslink repair, recombination and replication fork repair, and thereby help maintain genomic integrity. Eukaryotic XPF orthologues are large multidomain proteins that are not suitable for structural studies at pre

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Gillon, Alexandre. "Analyses non-destructives par accélérateur d’ions rapides et fluorescence X portable d’objets du patrimoine : détection d’éléments traces dans des monnaies en argent du XVIe siècle, caractérisation de la dorure sur un crucifix du XIIe siècle et de la brasure d’une canalisation médiévale en plomb." Electronic Thesis or Diss., Nantes Université, 2024. http://www.theses.fr/2024NANU4081.

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Cette thèse présente l’analyse de trois corpus d’intérêt patrimoniaux. La quantification d’éléments traces dans des monnaies d’argent frappées au XVIe siècle, vise à remonter les sources d’approvisionnement de l’atelier monétaire de Nantes. L’or a été analysé avec les méthodes HE-PIXE et p-XRF, ce qui a permis d’identifier le mouvement de l’argent du Potosi à Nantes entre 1561 et 1600. Cette thèse a également contribué au développement de PIXE à haute énergie pour améliorer la limite de détection de l’indium, un autre traceur de l’argent potosien. La caractérisation de l’état de surface de la

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Duda, Štěpán. "Studium budičů anhydritových maltovin." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371821.

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Presented diploma thesis is dealing with study of exciters of anhydrite binders. Theoretical part is dedicated to study of available domestic and foreign literature on a given topic. Attention is also paid to the study of the current research at the institute of THD. In the experimental part is developed a proposal of potential exciters of hydration on the basis of literature and according to the results of the research at the institute of THD. Next is proposed the methodological concept of the work. Testing of the monitored technological features follows. The study of the hydration process wa

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Maksimova, E. M., S. S. Hontsova, and I. A. Nauhatsky. "XRD Analysis of Crystal Structure of the Fragment of the Campo Del Cielo Meteorite." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/40668.

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Meteorites are the key, and often the only source of information about the pre-planetary and planetary early history of our solar system. Currently, the following classification of meteorites: stone (aerolites) stoney-iron (siderolites) and iron (siderites), depending on the ratio of silicate minerals in them, and nickel-iron.

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Patton, Paul E. "A PROCESSUAL APPROACH TO HOCKING VALLEY, OHIO, PREHISTORIC CERAMICS USING EDX AND XRD ANALYSIS." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1180051803.

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Hancock, Jared M. "Formation and Analysis of Zinc Oxide Nanoparticles and Zinc Oxide Hexagonal Prisms and Optical Analysis of Cadmium Selenide Nanoparticles." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3867.

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In this dissertation, methods to synthesize ZnO are reported. First, zinc oxide nanoparticles were synthesized with small amounts of transition metal ions to create materials called dilute magnetic semiconductors (DMS). We employed a low temperature sol-gel method that produces ZnO nanoparticles of reproducible size and incorporates cobalt, nickel, and manganese ions into the nanoparticles. Conditions were controlled such that a range of amounts of Co, Ni, and Mn were incorporated. The incorporation was tracked by color changes in the white ZnO powder to blue for Co, green for Ni and yellow fo

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Alshehabi, Abbas. "Grazing X-Ray Analysis." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157580.

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Krapukaitytė, Aušra. "Šiuolaikinės ir archeologinės keramikos tyrimas ir apibūdinimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090707_154423-80221.

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Šioje daktaro disertacijoje pirmoje dalyje nustatyta šiuolaikinės, o antroje dalyje – archeologinės keramikos gaminių elementinė ir fazinė sudėtis, bei ištirta morfologija. Šiuolaikinės ir archeologinės keramikos pavyzdžių elementinė sudėtis nustatyta Rentgeno spindulių dispersinės analizės (EDX), liepsnos atominės absorbcinės spektrometrijos (LAAS), titrimetrinės ir spektrofotometrinės analizės metodais. Parodyta, kad visų keraminių pavyzdžių kokybinė bei kiekybinė sudėtis yra skirtinga Nustatyta, kad visuose keramikos mėginiuose pagrindiniai elementai yra silicis ir aliuminis. SiO2 sudaro 46

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Kristen, Iris. "Investigations on rainfall variability during the late Quaternary based on geochemical analyses of lake sediments from tropical and subtropical southern Africa." Phd thesis, Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2009/3254/.

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This thesis presents investigations on sediments from two African lakes which have been recording changes in their surrounding environmental and climate conditions since more than 200,000 years. Focus of this work is the time of the last Glacial and the Holocene (the last ~100,000 years before present [in the following 100 kyr BP]). One important precondition for this kind of research is a good understanding of the present ecosystems in and around the lakes and of the sediment formation under modern climate conditions. Both studies therefore include investigations on the modern environment (in

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Krapukaitytė, Aušra. "Investigation and description of modern and archeological ceramics." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090707_154440-91021.

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The elemental composition of the samples of modern and archaeological ceramics was determined using the energy dispersive X-ray analysis, flame atomic absorption spectrometry, titrimetric and spectrophotometric analysis methods. It has been shown that the qualitative and quantitative composition of all the samples is different. It has been established that silicon and aluminium are the main elements in all the samples. SiO2 accounts for 46–60 % of the composition of the ceramics, Al2O3 – for some 17–33%. The amounts of Fe, Na, Mg, K, Ca and Ti discovered in the samples are several times lesser

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Ivashchenko, V. I., P. L. Skrynskiy, V. N. Rogoz, A. I. Kupchishin, and P. Węgierek. "Analysis of the Influence of Deposition Conditions on the Structure of the Coating Nb-Al-N." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42768.

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Nanocomposite Nb-Al-N films prepared by magnetron sputtering have been studied. It has been found that, in the films, there are two stable crystalline structural states, namely, NbNz and B1-Nb1 – xAlxNyO1 – y, and an amorphous like component related to aluminum oxynitride upon reactive magnetron sputtering. The substructure characteristics are sensitive to the current supplied to an Al target and related to the Knoop nanohardness and hardness, which change within in the ranges of 29-33.5 and 46-48 GPa, respectively. Ab initio calculations for the NbNz and Nb2AlN phases and NbN / AlN heterostr

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Al-Emam, Ahmed Mohamed Ahmed. "Genetic analyses of XLF and KU and their functional impacts on DNA-double strand break repair in human cells." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/3110/.

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XRCC4-like factor (XLF) is the most recently discovered core member of the nonhomologous end joining (NHEJ) machinery. XLF enhances ligation of DNA ends by DNA ligase IV (LIG4) and functionally interacts with KU70. Previous results showed that some polymorphic changes in LIG4 impact on the efficiency of double strand breaks (DSBs) repair. A random Caucasian population sample was screened for XLF polymorphic mutations with similar functional impact. This analysis identified two novel noncoding single nucleotide polymorphisms (SNPs). To address the regulation of XLF and KU70, the acetylation sta

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Dulina, I., L. Klochkov, M. Danilenko, and A. Ragulya. "Synthesis of Ni/NiO Nanopowder by Thermal Decomposition of Nickel Acetate Amine." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34819.

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Ni/NiO nanopowders have been synthesized using thermal decomposition of nickel acetate hexaammine in air. Obtained powders have been characterized by IR-spectroscopy, XRD and TG, DTA, DTG and HR TEM. Thermal decomposition of nickel ammine complexes occurs with forming nickel hydroxide, carbonate and hydroxocarbonate ammines precursors. Mean particle size of nickel and nickel oxide phases in powders depends on temperature. In the temperature range from 350 to 500 degrees Celsius the particle size of nickel oxide has grown from 5 to 25 nm and nickel from 50 to 55 nm. Particle size of 5 nm

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Stuart, Kevin L. "Discovery of Possible Paleotsunami Deposits in Pangandaran and Adipala, Java, Indonesia Using Grain Size, XRD, and ¹⁴C Analyses." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6719.

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Grain size, 14C age, and X-ray diffraction (XRD) analyses of sediments indicate possible tsunami deposits on the southern coast of Java near Pangandaran and Adipala. Previous studies that have described known recent and paleotsunami deposits were used for comparison. Fining-upward grain size trends, interbedded sand and mud, sediment composition, and trends in heavy mineral abundances are among the characteristics used for tsunami deposit identification. At Batu Kalde, an archaeological site south of Pangandaran, a layer of aragonitic sand with marine fossils was found atop a layer of archaeol

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Coufal, Daniel. "Rychlovazný silniční cement." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409759.

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The thesis deals with the study of magnesium oxide burned by various burning regimes and his possibilities of its usage as potential expansion additive. The theoretical part of the thesis concerns mainly the volume changes and how they can be influenced. The practical part focuses on monitoring morphology, phase composition and the hydration process of magnesium oxide.

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