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Dissertations / Theses on the topic 'Tracer studies'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Sharratt, Andrew Paul. "Silica supported nickel catalysts : tracer studies." Thesis, University of Surrey, 1991. http://epubs.surrey.ac.uk/843407/.

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A series of silica supported catalysts were prepared by impregnation of the support materials with a nickel(II) nitrate precursor under standard conditions. The catalysts and silicas were characterised using temperature programmed reduction (TPR) techniques, neutron diffraction, small angle neutron scattering, and 29Si magic angle spinning nuclear magnetic resonance (MAS-NMR). These analyses revealed one significant variable in the silicas:- the surface concentration of strained siloxane rings containing three silicon atoms. The catalysts were tested using ethene as a probe molecule and the am

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2

Leo, Timothy Patrick 1961. "Computer studies of heat tracer experiments in fractured rock." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/191982.

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The computer model PT is used to analyze a three-corehole recirculation heat tracer test conducted in a fractured granitic rock mass near Oracle, Arizona. Results of hydraulic tests and geophysical logs are cross-correlated =o determine the location, orientation and thickness of a high permeability fault zone, in which flow between the potencies during the heat tracer test is believed to occur. A quasi-three-dimensional model of fluid flow and heat transport in the fault zone is used to qualitatively reproduce a steep rise in measured temperature within a monitoring borehole. Computed thermal

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3

Price, C. S. "Tracer studies of pollutant dispersion in the urban atmosphere." Thesis, University of Bristol, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525828.

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4

Suksi, Juhani. "Natural uranium as a tracer in radionuclide geosphere transport studies." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/kemia/vk/suksi/.

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5

Mehta, Neha Ph D. Massachusetts Institute of Technology. "Radium cycling in groundwater : implications for bioremediation and tracer studies." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121704.

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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Thesis: Ph. D. in Environmental Engineering, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2019<br>Cataloged from student-submitted PDF version of thesis. Page 133 blank.<br>Includes bibliographical references.<br>Radium (Ra) is a radioactive alkaline earth element and forms naturally from the decay of uranium (U) and thorium (Th), elements that are ubiquitous within most rocks, soils and sediments. Radi

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6

Byrén, Lars. "Deposit-feeding in benthic macrofauna : Tracer studies from the Baltic Sea." Doctoral thesis, Stockholm University, Department of Systems Ecology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-62.

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<p>A low content of organic matter, which is largely refractory in nature, is characteristic of most sediments, meaning that aquatic deposit-feeders live on a very poor food source. The food is derived mainly from sedimenting phytodetritus, and in temperate waters like the Baltic Sea, from seasonal phytoplankton blooms. Deposit-feeders are either bulk-feeders, or selective feeders, which preferentially ingest the more organic-rich particles in the sediment, including phytodetritus, microbes and meiofauna.</p><p>The soft-bottom benthos of the Baltic Sea has low species biodiversity and is domin

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7

Byrén, Lars. "Deposit-feeding in benthic macrofauna : tracer studies from the Baltic Sea /." Stockholm : Institutionen för systemekologi, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-62.

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8

Sutton, David G. M. "Stable isotope tracer studies for the measurement of equine gastrointestinal motility." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422249.

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9

Aravindhan, Karpagam Jucker Beat M. DiNardo N. John. "Assessing the effects of LXR agonists in cholesterol handling: stable isotope tracer studies /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/613.

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10

Cline, David James 1956. "Tracer experiments using bromide ion and two bacteriophages during soil aquifer treatment studies." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278114.

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The fate and transport of a conservative and two bacteriophage tracers during Soil Aquifer Treatment (SAT) has been examined. A 12 foot x 12 foot mini-basin containing seven stainless steel suction samplers ranging in depth from 1 to 20 feet below land surface was constructed in an existing recharge basin. Bromide ion and MS-2 and PRD-1 virus tracers were introduced into the mini-basin during recharge of secondary effluent during three of nine flooding cycles in order to aid in interpreting transport processes and to determine the presence of preferred-flow channels. High infiltration rates an

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11

Fredriksson, Anna. "Tracer development and PET studies : labeled proinsulin C-peptide and an EGFR-TK inhibitor /." Stockholm, 2002. http://diss.kib.ki.se/2002/91-7349-191-8.

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12

Wells, Paula. "Assessment of 2-(11C) thymidine tracer kinetic studies in the pharmacodynamic evaluation of anticancer therapy." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271122.

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13

Goldson, Laura Elizabeth. "Vertical mixing across the seasonal pycnocline of the Southern Ocean : studies using sulphur hexafluoride tracer." Thesis, University of East Anglia, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410089.

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14

Ward, Robert S. "Artificial tracer and natural Â²Â²Â²Rn studies of the East Anglian chalk aquifer." Thesis, University of East Anglia, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405588.

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15

Lee, Yong-Jae. "Metabolic tracer studies of linoleic and linolenic acids to identify biohydrogenation intermediates produced by ruminal microorganisms." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1246565715/.

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16

Singh, D. P. "Flow and mixing studies in a co-rotating intermeshing twin screw extruder." Thesis, Brunel University, 1988. http://bura.brunel.ac.uk/handle/2438/5548.

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The basic understanding of mixing in the process of polymer melt extrusion by twin screw extruder is limited by their geometrical complexity and the interactions of the process parameters. Mixing and flow in a 100mm diameter, trapezoidal channeled, intermeshing co-rotating twin-screw extruder have been characterised by determination of residence time distribution (RTD) and of the paths taken by tracers added to the melt. The axial mixing and the effects of varius parameters on it were established by studying RTD using tracer techniques. As the tail of the distribution is of paramount importanc

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17

Mendez, Sagel Adriana (Adriana Raquel). "Water quality studies in Kranji Catchment, Singapore : use of organic tracer and PEDs for identifying potential sewage sources." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60776.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>The objective of this study was to identify organic compounds that could serve as indicators of potential human fecal contamination sources to the Kranji Reservoir in Singapore that could be used as confirmation indicators along with bacteria indicators. The compounds chosen as potential tracers were nonylphenol and nonylphenol ethoxyltes (NPEOs), as these are indicative of sewage and have been found at

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18

Burnett, John Robert. "Regulation of apolipoprotein B metabolism by cholesterol and/or cholesteryl esters in vivo, tracer kinetic studies in miniature pigs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ31150.pdf.

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19

Grant, Steven Lloyd. "Geochemical, radiogenic tracer isotopic, and U-Pb geochronological studies of Yukon Tanana terrane rocks from the Money klippe, southeastern Yukon, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq22600.pdf.

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20

Niu, Zheng [Verfasser], Bernd [Akademischer Betreuer] Reif, Bernd [Gutachter] Reif та Aphrodite [Gutachter] Kapurniotu. "NMR Studies to Characterize Amyloid Inhibitors and Aβ-PET Tracer Complexes / Zheng Niu ; Gutachter: Bernd Reif, Aphrodite Kapurniotu ; Betreuer: Bernd Reif". München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/119244180X/34.

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21

Jong, Edmund Chime. "Development and Evaluation of a Permeation Plug Release Vessel (PPRV) for the Release of Perfluoromethylcyclohexane (PMCH) in Underground Mine Tracer Gas Studies." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/24912.

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The use of sulfur hexafluoride (SF6) as a tracer gas for analyzing underground mine ventilation systems has been practiced for over 30 years. As a result, the methods used to release, sample, and analyze SF6 are well accepted. Although improvements are still being made to enhance the analysis of this tracer, the overall technique remains largely the same. However, as the complexity and size of underground mine ventilation networks increase, coupled with steadily rising SF6 background levels, the ability of a single gas to function as a convenient, rapid means of analysis diminishes. The utiliz

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22

Woulds, Clare. "Investigating the links between faunal activity and organic geochemistry in continental margin sediments : tracer studies across the Arabian Sea oxygen minimum zone." Thesis, University of Edinburgh, 2005. http://hdl.handle.net/1842/14707.

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The objectives of this study were to investigate the role that fauna play in short-term OM processing, how this varies with OM supply and quality, oxygen availability and faunal community structure, and how faunal activity is linked to sediment organic geochemistry. This was achieved through experiments and organic geochemical sampling, at sites spanning the OMZ on the Pakistan margin. The steep gradients in OM quantity and quality, oxygen, and faunal communities, and seasonal changes in OM supply, provided an exceptional natural setting to assess these relationships. Incubation studies were c

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23

Shah, Farah. "Chemical development of radioligands for PET studies of central neurotransmitters in vivo." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314090.

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24

Sumrall, Jonathan. "Using 34-S as a tracer of dissolved sulfur species from springs to cave sulfate deposits in the Cerna Valley, Romania." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002833.

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25

Grainger, Nancy. "Petrogenesis of Middle Jurassic to Miocene magmatism within the Nechako plateau, central British Columbia, insight from petrography, geochemistry, geochronology and tracer isotope studies." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0014/MQ60123.pdf.

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26

Robson, P. "Structural studies of phosphates and molybdophosphates formed in nitric acid : Vibrational spectroscopic, isotopic-tracer and plutonium/americium absorption studies on zirconium phosphate and ammonium/caesium/rubidium molybdophosphates formed in nitric ac." Thesis, University of Bradford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379904.

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27

Spence, Victora. "Estimating groundwater discharge in the oligohaline ecotone of the Everglades using temperature as a tracer and variable-density groundwater models." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3361.

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Recent research suggests that brackish, marine-derived groundwater up-wells in the oligohaline ecotone of the coastal Everglades, bringing with it phosphorus to an otherwise phosphorus-poor environment. The purpose of this study is to estimate the rates and timing of the groundwater discharge by using variable-density groundwater models constructed, calibrated, and validated with field measurements of hydraulic head and surface and subsurface temperature. Modeled groundwater discharge rates ranged from 5.4E-04 mm/day in August to -1.3E-03 mm/day in June for Shark Slough and 4.8E-01 mm/day in J

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28

Pechenik, Natalie. "Lateral macropore dominated flow on a clay settling area in the phosphate mining district, peninsular Florida." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002982.

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29

Balzani, Laura. "Preliminary stages and studies for the development of a 3D aquifer physical model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19033/.

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Groundwater issues are among the most important sustainability studies related to topics considered as critical point for the future of planet Earth(Gleeson et al., 2010) in the perspective of a sustainable world. Analyses are focused on two complementary aspects: quantity and quality.Thus, once physical behaviour is analysed, it is coupled with chemical characterisation studies, in order to obtain a better view of an investigated site.The work begins with a brief overview of the literature which summarizes the challenges of teaching hydrogeology by theoretical lessons coupled with practical a

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30

Casado, Mathieu. "Water stable isotopic composition on the East Antarctic Plateau : measurements at low temperature of the vapour composition, utilisation as an atmospheric tracer and implication for paleoclimate studies." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLV058/document.

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Les carottes de glace permettent de reconstruire le climat du passé, à partir entre autre de la composition isotopique de l’eau (δ18O, δ17O et δD). Sur le plateau Est Antarctique, les températures très froides et les faibles accumulations permettent de remonter le plus loin dans le passé (jusqu’à 800 000 ans) mais compliquent l’interprétation du signal isotopique. Premièrement, les reconstructions des variations de température dans les carottes de glace à partir des isotopes de l’eau se basent sur des modèles pour décrire l'évolution de la composition isotopique de la vapeur et de la phase con

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31

Murphy, Kathryn E. "Hydrological connectivity between clay settling areas and surrounding hydrological landscapes in the phosphate mining district, Peninsular Florida, USA." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0001998.

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32

Weckmann, Armin. "Material migration in tokamaks: Studies of deposition processes and characterisation of dust particles." Licentiate thesis, KTH, Fusionsplasmafysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178026.

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Thermonuclear fusion may become an attractive future power source. The most promising of all fusion machine concepts is the tokamak. Despite decades of active research, still huge tasks remain before a fusion power plant can go online. One of these important tasks deals with the interaction between the fusion plasma and the reactor wall. This work focuses on how eroded wall materials of different origin and mass are transported in a tokamak device. Element transport can be examined by injection of certain species of unique and predetermined origin, so called tracers. Tracer experiments were co

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33

Georgiou, Leonidas. "DCE-MRI assessment of hepatic uptake and efflux of the contrast agent, gadoxetate, to monitor transporter-mediated processes and drug-drug interactions : in vitro and in vivo studies." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/dcemri-assessment-of-hepatic-uptake-and-efflux-of-the-contrast-agent-gadoxetate-to-monitor-transportermediated-processes-and-drugdrug-interactions-in-vitro-and-in-vivo-studies(d4b3bc62-8636-470b-90ae-38e25e7ee7be).html.

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Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) techniques offer the opportunity to understand the physiological processes involved in the distribution of the contrast agent in vivo. This work utilises a liver specific contrast agent (gadoxetate) and demonstrates the potential use of these techniques to study transporter-mediated process in vivo. In vitro experiments investigated gadoxetate’s interaction with uptake and efflux transporters at the cellular level, ideally a prerequisite to understand the contribution of transporter proteins in in vivo pharmacokinetics. MRI was use

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34

Chimpalee, Narong. "Studies in inorganic trace analysis." Thesis, Queen's University Belfast, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336038.

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35

Olson, Ted. "The Last Trace." Digital Commons @ East Tennessee State University, 2015. https://www.amzn.com/1937875873.

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Book Summary: Robert Morgan and Kathryn Stripling Byer, Al Maginnes and Cathy Smith Bowers, Thomas Rain Crowe and Michael McFee, as well as many new voices. . . Indeed, the variegation of the Tar Heel State's landscapes, as well as its rich history, is reflected through the myriad voices of its contemporary verse. As with other volumes of The Southern Poetry Anthology, this book--full of a wide gamut of poetic styles and approaches--will appeal to many readers, prove an excellent teaching resource for North Carolina students of literature, and serve as the definitive poetic document for North

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36

Montague, Trevor Edward. "Applied gas tracers for groundwater studies." Thesis, Queen's University Belfast, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486570.

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37

Dundar, Mustafa Sahin. "Speciation studies on dietary trace elements." Thesis, University of Hull, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337335.

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38

Feltham, David John. "Trace element studies by proton microprobe analysis." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258766.

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39

Witt, Melanie Louise Inez. "Studies of trace metals in the atmosphere." Thesis, University of East Anglia, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399841.

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Atmospheric deposition of trace metals to the oceans is investigated in this study with analysis of aerosol samples collected during cruises from the UK to the Falklands and from South Africa to Australia. The readily soluble concentrations of Cu, Ni, Ba, Zn, Cd and Pb were measured in the aerosols, along with crustal elements and major ions to evaluate the sea spray and crustal contributions. Air mass back trajectories suggested most of the aerosol samples had spent several days over the ocean prior to collection. The highest metal concentrations were observed in aerosols close to South Afric

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40

Mitchell, John Douglas. "Trace element studies in motor neurone disease." Thesis, University of Aberdeen, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261363.

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The first part of the thesis reviews previous literature relating to motor neurone disease (MND), the cause of which remains obscure more than 150 years after it was first described. Historical aspects are presented drawing attention to the early descriptions of different facets of the clinical picture of MND which preceded its crystallisation into a single disease entity in the teaching and writing of Charcot. Much of this early work depended on knowledge of the toxic effects of lead on the peripheral nervous system. The epidemiology, blood group and HLA associations, pathology, immunology an

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41

Boehme-Terrana, Linae Marie. "Trace metals and stable isotopes as tracers of life history and trophic connections in estuarine-dependent fish from Tampa Bay, Florida." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002241.

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42

Allus, Mahmoud A. "Thallium and trace metals as pollutants : chemometric studies." Thesis, University of Bristol, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294095.

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43

Mårtensson, Oskar. "LHCb Upstream Tracker box : Thermal studies and conceptual design." Thesis, Umeå universitet, Institutionen för fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-116163.

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The LHC (Large Hadron Collider) will have a long shut down in the years of 2019 and 2020, referred to as LS2. During this stop the LHC injector complex will be upgraded to increase the luminosities, which will be the first step of the high luminosity LHC program (which will be realized during LS3 that takes place in 2024-2026). The LHCb experiment, whose main purpose is to study the CP-violation, will during this long stop be upgraded in order to withstand a higher radiation dose, and to be able to read out the detector at a rate of 40MHz,compared to 1MHz at present. This change will improve t

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44

Hutchinson, Andrew. "Diode laser studies of trace species and their reactions." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437045.

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45

Lohan, Maeve Carroll. "Studies on the biogeochemistry of zinc in the subArctic North Pacific." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252322.

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46

Josephson, Seth Joshu josephson. "Beastly Traces: The Co-Emergence of Humans and Cattle." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1515025660373023.

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47

Rüter, Friederike. "Späte Trauer eine Studie zur seelsorglichen Begleitung Trauernder." Leipzig Evang. Verl.-Anst, 2008. http://d-nb.info/991756304/04.

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48

McLeod, John Edward. "Marker studies of nickel silicide formation." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/15903.

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Includes bibliographical references.<br>Atomic diffusion during the solid state formation of thin films of nickel silicides (Ni2Si and NiSi) from nickel and amorphous silicon has been investigated using 31Si radioactive tracer and inert marker techniques. Samples were prepared by vacuum deposition of thin films of nickel and silicon, followed by thermal annealing to effect silicide growth. The radioactive tracer investigation of Ni2Si showed nickel to be the diffusing species during silicide growth. Sharply defined Ni2si* profiles of 100% radioactive concentration at the sample surface were -

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49

Muskara, Uftade. "Provenance Studies On Limestone Archaeological Artifacts Using Trace Element Analysis." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608429/index.pdf.

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Trace element composition of archaeological artifacts is commonly used for provenance studies. Limestone has generally studied by geologists and there are a few researches done by various archaeological sciences. Although it is a common material for buildings and sculpture it is been thought that limestone used had not imported like marbles. Limestone figurines from Dat&ccedil<br>a/Emecik excavations are classified as Cypriote type, which was very popular through 6th century B.C. in the Mediterranean region. Since this type of figurines was found at Emecik numerously to determine its provenanc

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50

Archibald, Alexander Thomas. "Numerical studies on dispersion and degradation of atmospheric trace gases." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.535480.

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