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Dissertations / Theses on the topic 'Metal distribution'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Dario, Mårten. "Metal distribution and mobility under alkaline conditions /." Örebro : Örebro universitetsbibliotek, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-66.

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2

Liu, Yujing. "Finite element analysis of stress distribution within metal-on-metal joint replacements." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/471.

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Demand for joint replacements is rising in Australia, driven by a sharp increase in the number of joint problems associated with population aging and obesity. In artificial joints, delamination or failure within the coatings occurs when the stress reaches a critical level, resulting in large wear debris particles appearing on the contact surface between the head and the cup. The process has been described as due to a stress-corrosion-cracking mechanism. Under the same loading, stress increases when the contact area decreases, which happens in the vicinity of wear debris. As such, once wear deb

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3

Lampshire, Shelby. "Metal Dust Cloud Distribution Characterization Through Image Analysis." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2333.

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With the increasing development of metal additive manufacturing technology, the present need for accurate explosivity testing of high density and exotic metal powders is under active research. The accuracy of such tests depends upon the uniformity of the dust dispersion within the testing chambers during ignition. There is a need for further research to understand the dust cloud dispersion process in order to determine the best time for ignition. This study explores a methodology of using high-speed footage and image analysis to characterize the uniformity of a dust cloud temporally that futur

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4

Duan, Zhiwei. "The Distribution of Toxic and Essential Metals in the Florida Everglades." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/684.

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Concentrations of 18 metals, including toxic metals (As, Cd, Cr, Ni and Pb) and essential metals (Al, Ba, Be, Co, Cu, Fe, Li, Mg, Mn, K, Sr, V and Zn) in various compartments (sediment, floc, and periphyton) were measured in the Florida Everglades to (i) establish the spatial distribution pattern of the metals in the Everglades and (ii) quantify the major sources of the 18 metals present in the Everglades. The highest mean concentrations of all metals analyzed in the Everglades were detected in soil, followed by floc and periphyton. Most metals exhibited random spatial distribution patterns. R

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5

Starna, Steven. "Mineralogy and heavy metal distribution in cinders produced by coal combustion." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq64459.pdf.

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6

Zhao, Yingkui. "Heavy metal distribution in floodplain sediments of the river Severn, UK." Thesis, University of the West of England, Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327475.

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7

Xiao, Hong. "Distribution of Metal Ions in Prostate and Urine during Prostate Carcinogenesis." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1310410436.

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8

Williams, Kevin Vaughan Carleton University Dissertation Engineering Mechanical. "The numerical prediction of strain distribution in sheet metal forming operations." Ottawa, 1993.

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9

Zhang, Hongzhi. "Material Distribution in Metal Plates for Buckling Control in Kinetic Facades." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29774.

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This thesis investigates the buckling and post-buckling behaviours of varied thickness distribution rectangular plates with three sides simply supported, one longitudinal edge free and a stress gradient applied to the two short edges. The primary aim of this thesis is to provide a design method for the thickness distribution of a plate that meets a design target for buckling behaviours. The main conclusion of this thesis is that a modified evolutionary structural optimisation (ESO) method satisfied the requirements of the design method and successfully controlled the buckling shape and bucklin

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10

Khan, Muhammad Munir Ahmed. "Effects of metal-on-metal hip replacement : clinical results and release, distribution and biological effects of wear debris." Thesis, Keele University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499344.

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This PhD thesis studies the performance of metal-on-metal bearings, which are used in hip arthroplasty. Three aspects in particular were studied, namely the clinical results, the release of cobalt and chromium wear debris from the bearings, and the effects of this debris on a cell's DNA. The clinical results showed that large diameter metal-on-metal bearing hip resurfacing (BHR) restored hip function to an excellent level and had an extremely low failure rate up to eight years after the operation. This makes a metal-on-metal bearing an attractive option for hip replacementin high-demand patien

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11

Arbiol, i. Cobos Jordi. "Metal Additive Distribution in TiO2 and SnO2 Semiconductor Gas Sensor Nanostructured Materials." Doctoral thesis, Universitat de Barcelona, 2001. http://hdl.handle.net/10803/1503.

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Recently, there has been an increasing interest in the electronics world for those aspects related to semiconducting gas sensor (SGS) materials. In view of the increasingly strict legal limits for pollutant gas emissions, there is a great interest in developing high performance gas sensors for applications such as controlling air pollution and exhaust gases. In this way, semiconductor gas sensors offer good advantages with respect to other gas sensor devices (such as spectroscopic and optic systems), due to their simple implementation, low cost and good reliability for real-time control system

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12

Vaidya, Rajendra D. "USING ELECTROCHEMICAL MONITORING TO PREDICT METAL RELEASE IN DRINKING WATER DISTRIBUTION SYSTEMS." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3982.

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ABSTRACT Corrosion of distribution system piping and home plumbing materials is a major concern in the water community. Iron release adverse affects aesthetic water quality and the release of copper and lead is regulated by the Lead and Copper rule (LCR) and can adversely affect consumer health. Corrosion control is typically done by pH regulation and/or addition of corrosion inhibitors. Monitoring of corrosion control is typically done after the fact by monitoring metal release, functional group concentration of the selected chemical species or water quality. Hence, the associated laboratory

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13

Barton, Lauren Elizabeth. "Fate and Transformation of Metal-(Oxide) Nanoparticles in Wastewater Treatment." Diss., Aix-Marseille, 2014. http://hdl.handle.net/10161/8661.

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<p>The study and application of materials possessing size dimensions in the nano scale range and, as a result, unique properties have led to the birth of a new field; nanotechnology. Scientists and engineers have discovered and are exploiting the novel physicochemical characteristics of nanoparticles (NPs) to enhance consumer products and technologies in ways superior to their bulk counterparts. Escalating production and use of NPs will unavoidably lead to release and exposure to environmental systems. This introduction of emerging potential contaminant NPs will provide new and interesting

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14

Kirby, Jason K., and n/a. "Trace metal and metalloid accumulation, distribution, and, speciation in Lake Macquarie, N.S.W., Australia." University of Canberra. Resource, Environmental & Heritage Sciences, 2005. http://erl.canberra.edu.au./public/adt-AUC20051129.124508.

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THESIS ORGANISATION This thesis is organised into nine chapters that include seven international and national publications (six accepted and one submitted for publication). The initial overview chapter outlines the justification and direction for this thesis. With the exception of chapter 8 (accepted for publication on the 1st May 2005); all chapters are exact duplicates of published articles in international and national refereed journals (chapters 2 to 7). The initial chapters (2 and 3) presents research findings using a marine fish species, mullet (Mugil cephalus), to measure trace metal b

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15

Chirwa, Efford Clive. "Theoretical analysis and pressure distribution of thin-walled metal inverbuckle energy absorbing tubes." Thesis, Cranfield University, 1998. http://hdl.handle.net/1826/3970.

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This dissertation presents an investigation in the energy absorbing capacity of thin-walled metal inverbucktubes loaded in axial compression. It also presents the inversion-buckling(curling-buckling) behaviour achieved in both, quasi-static and dynamic loading conditions. In addition, for the first time, the experimental results of the pressure or normal stress distribution between the inside surface of the inverbucktube and die fillet radius interface are stipulated. These were very successful, using the pressure transducer method. Furthermore, a mathematical model has been developed, based o

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16

Takam, Rungdham. "Determination of dose distribution of Ruthenium-106 Ophthalmic applicators." Title page, contents and abstract only, 2003. http://web4.library.adelaide.edu.au/theses/09SM/09smt1363.pdf.

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"August 2003" Bibliography: leaves 108-117. 1. Ruthenium-106 ophthalmic applicators -- 2. General principle of thermoluminescent dosimeter -- 3. Study of basic characteristics of CaSO4:Dy TLD -- 4. Measurements of COB and CCA type ruthenium-106 ophthalmic applicator dose distributions -- 5. Determination of the dose rate distribution using a MOSFET detector -- 6. Summary and conclusion. In this project, small CaSO4:Dy TLDs and a semiconductor MOSFET dosimeter were used for the determination of on-axis depth dose-rate distributions of 15-mm and 20-mm ruthenium-106 applicators in acrylic eye pha

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17

Shek, Yiu-fai, and 石耀輝. "Electric field distribution in metal/semi-insulating GaAs contacts investigated by positron lifetime technique." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31221579.

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18

Marriott, P. "Angular and mass resolved energy distribution measurements with a gallium liquid metal ion source." Thesis, University of Salford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376877.

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19

Melo, Leonardo de. "Powder jet particle density distribution analysis and qualification for the laser metal deposition process." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/171441.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2015.<br>Made available in DSpace on 2016-12-13T03:03:04Z (GMT). No. of bitstreams: 1 340514.pdf: 4063742 bytes, checksum: 6a2f911982008b177bc31b52c459c372 (MD5) Previous issue date: 2015<br>Abstract: The quality of the Laser Metal Deposition process depends on several factors and components. One of them and also one of the most important is the powder jet. Regular monitoring of the different variables involved on the powder jet need to be perf

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20

Hoppe, Martin Louis. "Characterization of the electronic structure of complexes containing metal-heteroatom multiple bonds." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184616.

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The electronic structure of a variety of metal-heteroatom multiply bonded complexes, including some active alkyne metathesis catalysts, have been investigated using He(I) and He(II) ultraviolet photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS) and Fenske-Hall molecular orbital calculations. Utilizing this electronic structure information, confirmation of the proposed mechanism for the alkyne metathesis reaction which involves formation of a metallacyclobutdienyl intermediate was ascertained. Also, the important relationships between metallatetrahedral and metallacyclobut

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21

Diouf, Aissatou. "Effect of Organic Amendments on Heavy Metal Distribution and Uptake in Vegetable Gardens in Senegal." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73036.

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The major constraints to food production in West Africa are related to the lack of suitable lands. Consequently, farmers incorporate organic amendments and wastewater to improve their yields. Within some limits, such wastes enhance soil fertility and can improve its physical properties. However, the advantages of using organic waste as fertilizer and soil amendment should be assessed with possible environmental and toxicological impacts due to the potential presence of heavy metals. The objective of this study was to assess the effect of organic amendments on heavy metal distribution in soils

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22

Boselli, Julien. "Quantification of the effects of reinforcement distribution and morphology on fatigue in Al-SiCâ†p composites." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310572.

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23

Mieiro, Cláudia Leopoldina de Brito e. Veiga Rodrigues. "Mercury in feral fish: distribution, accumulation and toxicity." Doctoral thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/3735.

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Doutoramento em Química<br>O principal objectivo desta dissertação foi estudar a acumulação de mercúrio em vários tecidos de peixes marinhos, a sua relação com factores biológicos e as respectivas respostas bioquímicas. O trabalho realizado permitiu obter novos conhecimentos sobre a acumulação de mercúrio em peixes, possibilitando avaliar a influência da biodisponibilidade do elemento e as suas possíveis implicações no ambiente. O trabalho foi desenvolvido na Ria de Aveiro (Portugal), uma zona costeira onde existe um gradiente ambiental de mercúrio, o que oferece a oportunidade de estud

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24

Zhang, Xiuqing. "Heavy metal concentration, distribution and bioavailability in floodplain soils of the River Manifold and Derwent, UK." Thesis, University of the West of England, Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490467.

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This study investigates and examines the concentrations of Cd, Cr, Cu, Mn, Ni, Pb and Zn in the Manifold and Derwent floodplain soils, their distribution across the floodplains, transportation along the river channels, bioavailability to grazing grasses, and association with soil pH and organic matter. Six floodplains (2 from the Manifold catchment and 4 from the Derwent catchment) have been chosen as field sites, and 61 paired soil and grass samples have been collected and analysed.

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25

Qiu, Li. "PIXE and micro-PIXE studies on the distribution of metal ions in environmental and biological samples." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/288804.

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PIXE--Proton Induced X-ray Emission is a novel and powerful tool for non-destructive multi-element analysis with excellent sensitivity. This technique has been applied to several biological and environmental studies at the University of Arizona. The first application reported here is the study of carrot tissue samples, obtained from plants irrigated with uranium, molybdenum, selenium or manganese contaminated water. The carrots were analyzed with PIXE for the concentrations of these elements taken up by the plants from water. The standard addition method along with an added internal standard w

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26

Martins, Pedro Emanuel Pato. "Variability of mercury distribution and exchanges between the Ria de Aveiro and the Atlantic Ocean." Doctoral thesis, Universidade de Aveiro, 2007. http://hdl.handle.net/10773/3192.

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Doutoramento em Química<br>A Ria de Aveiro (Portugal) é uma laguna mesotidal que comunica com o Oceano Atlântico através de um único e estreito canal. Durante quatro décadas, foram descarregados num braço da Ria efluentes contaminados com mercúrio provenientes de uma indústria de produção de cloro e soda caustica e estudos anteriores documentam que cerca de 33 toneladas de mercúrio foram retidos nos sedimentos da laguna. O presente trabalho teve como objectivo aumentar o conhecimento dos processos de dispersão e sobre o comportamento do mercúrio durante o percurso estuarino (incluindo a import

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27

Norris, Pauline Rose Hack. "Arsenic and Selenium Distribution in Coal-Fired Plant Samples." TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/52.

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Arsenic and selenium distributions in coal-fired plant samples are studied. This research includes arsenic and selenium concentrations in samples of coal, fly ash, bottom ash, economizer ash, Flue Gas Desulfurization (FGD) slurry and flue gas taken from four power plants with the goal being to examine the distribution of these metals in these materials and calculate a materials balance for the system. All samples were analyzed using ICP-ES. This research shows that 60-80% of the arsenic in coal-fired plant samples will be associated with the fly ash. Approximately 35-55% of the selenium will b

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28

Whitebrook, J. "Heavy metal tolerance and the distribution in SW Britain of the diploid and tetraploid cytotypes of Leucanthemum vulgare Lam. (Compositae)." Thesis, University of Bristol, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372036.

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29

Sanchez, Nicolas. "Distribution and Variation of the Trace Metal Iron in the Base of the Pelagic Marine Food Web: A Mesocosm Approach : Trace Metal in marine biology." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, Institutt for biologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18371.

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This study was part of the WAFOW project “Can waste emission from fish farms change the structure of marine food webs?” whose objective was to perform mesocosms experiment to simulate the ammonium enriched environment, caused by salmon aquaculture. In order to assess how changes in the stoichiometry of major elements (nitrogen) in the sea affect the distribution of bioactive trace metals, and its effects on the base of the pelagic food web, the distribution and variation in time of the trace metal iron in the water and within the plankton community was studied along a 22 day experiment. It inv

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30

Stone, Ian C. "The characterisation of the spatial distribution of reinforcement in powder metallurgy route Al/SiCp MMCs and its effect on their processing and properties." Thesis, University of Surrey, 1994. http://epubs.surrey.ac.uk/804376/.

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31

Khandoker, Rafiqul Alam. "Distribution of Heavy Metals and Trace Elements in Soils of Southwest Oregon." PDXScholar, 1997. https://pdxscholar.library.pdx.edu/open_access_etds/4691.

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Soil samples from 118 sites on 71 geologic units in southwest Oregon were collected and analyzed to determine the background concentrations of metals in soils of the region. Sites were chosen in areas that were relatively undisturbed by human activities. The U.S. Environmental Protection Agency approved total-recoverable method was used to recover metals from samples for analysis. The twenty six metals analyzed were: Ag, AI, As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, La, Li, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Tl, V and Zn. The Klamath Mountains followed by the Coast Range contain the highest soil

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32

Soares, Marcio Roberto. "Coeficiente de distribuição (Kd) de metais pesados em solos do estado de São Paulo." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-31052005-170719/.

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A disposição de resíduos sólidos e a aplicação de pesticidas e fertilizantes podem levar ao aumento da concentração de metais pesados em solos e águas subterrâneas. A legislação sobre metais pesados quase sempre se refere aos seus teores totais, mas a avaliação do potencial de risco e da toxicidade requer a avaliação da proporção de metal que é móvel e, possivelmente, biodisponível. Alguns parâmetros numéricos têm sido utilizados para tomadas de decisões e para direcionar estratégias de prevenção ou de remediação de áreas contaminadas. O coeficiente de distribuição sólido-solução (Kd), defin

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33

Wongrod, Suchanya. "Biochars from solid digestates as sorbing materials for metal(loid)s removal from water." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC2023.

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Les digestats des boues d'épuration (SSD) et les digestats de la fraction organique des déchets ménagers (OFMSWD) ont été récemment considérés comme des sources potentielles pour la production de biochars en raison des quantités grandissantes de digestats solides restant à la fin de la digestion anaérobie. La pyrolyse des digestats solides est connue comme une technique pour promouvoir le recyclage des déchets organiques et générer des bio-produits à valeur ajoutée (i.e. biochar). En outre, en raison d'une capacité de sorption des métal(loïde)s des biochars moins bonnes par rapport aux charbon

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34

Andersson, Oscar. "Influence of primary precipitate shape, size volume fraction and distribution in PM tool steels on galling resistance." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-37813.

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In sheet metal forming (SMF), the major failure reason is galling. Galling is a process of different wear stages that leads to destruction of both the forming tool and the sheet metal working piece and is, because of that, of big economic importance for the SMF industries. Therefore, investigations and researches about how tool steels microstructure affect the tool steels galling resistance is of high priority. In the present work, different carbide properties were studied to find out how their properties affected the tool materials galling resistance. The investigated carbide properties were:

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35

Plagens, Owen. "Investigation of combustion products of metal rods in normal and reduced gravity." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/105375/1/Owen_Plagens_Thesis.pdf.

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This research studied the combustion products generated from the burning of metals in high-pressure oxygen. The work revealed the effects of oxygen pressure and gravity level on the products produced. The findings contribute to our understanding of how bulk metals burn, the morphology and size distribution of the products produced and is relevant to applications in terrestrial and space environments of fire safety, forensics, particle generation and fundamental combustion science.

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36

SONDER, ALBERT. "Etude de la distribution electronique du cerium dans le metal, des oxydes et des composes a valence intermediaire." Paris 6, 1990. http://www.theses.fr/1990PA066774.

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Les caracteristiques spectrales 3d de valences du ce3+ et ce4+ ont ete definies a la fois experimentalement et theoriquement a l'aide d'un calcul fait dans un modele atomique utilisant le code mcdf de grant. Les caracteristiques ont ete ensuite utilisees pour etudier des composes a valence intermediaire de ce. Nous avons etabli que: (i) la configuration f#1 de ce#3#+ est tres stable et possede un caractere atomique meme dans le solide. Nos calculs nous ont permis de plus, de determiner les caracteristiques des spectres nd associes a cette configuration (ii) dans ce#4#+, les etats vides sont fa

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37

Yee, Irene. "Powder Bed Surface Quality and Particle Size Distribution for Metal Additive Manufacturing and Comparison with Discrete Element Model." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1888.

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Metal additive manufacturing (AM) can produce complex parts that were once considered impossible or too costly to fabricate using conventional machining techniques, making AM machines an exceptional tool for rapid prototyping, one-off parts, and labor-intensive geometries. Due to the growing popularity of this technology, especially in the defense and medical industries, more researchers are looking into the physics and mechanics behind the AM process. Many factors and parameters contribute to the overall quality of a part, one of them being the powder bed itself. So far, little investigation

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38

Regmi, Suresh Chandra. "Monitoring Metal Containing Particulates Distribution on a College Campus Using Dandelion (Taraxacum officinale) Leaves as Receptors." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etd/1976.

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This study aims to determine the distribution of particulates carrying heavy metals at selected sites on a college campus using dandelion leaves as collectors. As a comparison, sites far away from the campus surrounding Bristol Motor Speedway Car Racing Stadium were also monitored. To reduce the probability of memory effects from the long-term atmospheric deposition or absorption of metals from soil a seasonal plant, dandelion, was used to monitor the metal contents. The metals monitored are cadmium, calcium, copper, chromium, iron, lead, and zinc. Fourteen sites were monitored and samples wer

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39

Fritioff, Åsa. "Metal accumulation by plants : evaluation of the use of plants in stormwater treatment." Doctoral thesis, Stockholm University, Department of Botany, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-613.

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<p>Metal contaminated stormwater, i.e. surface runoff in urban areas, can be treated in percolation systems, ponds, or wetlands to prevent the release of metals into receiving waters. Plants in such systems can, for example, attenuate water flow, bind sediment, and directly accumulate metals. By these actions plants affect metal mobility. This study aimed to examine the accumulation of Zn, Cu, Cd, and Pb in roots and shoots of plant species common in stormwater areas. Furthermore, submersed plants were used to examine the fate of metals: uptake, translocation, and leakage. Factors known to inf

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40

Kylner, Carina. "Light scattering for analysis of thermal stress induced deformation in thin metal films." Doctoral thesis, KTH, Fysik, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2547.

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Today, thin film based devices are found in a wide field of applications. The main reasons are that thin film technology enables access to unique physical properties and possibilities to miniaturize devices. Thin film devices are generally described in terms such as electrical, optical and magnetical properties. However, the lifetime of these devices is often limited by mechanical stresses causing plastic deformation. An effect of the plastic deformation is hillocking where isolated features are created on the film surface. The continual need to improve performance, reduce size as well as cost

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41

Bouillier, Guillaume. "Etude d'une methode de mesure des distributions de charges electriques dans des structures metal-isolant-semiconducteur." Paris 6, 1987. http://www.theses.fr/1987PA066120.

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Utilisation d'une methode de mesure des distributions des charges, concue a l'origine pour etudier les proprietes electriques des polymeres, afin de mettre en evidence les charges electriques piegees dans les structures metal-isolant-semiconducteur

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42

Andong, Omores Raissa. "Spatio-temporal distribution of polycyclic aromatic hydrocarbons (PAHs) in soils in the vicinity of a petrochemical plant in Cape Town." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2432.

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Thesis (MTech (Chemistry))--Cape Peninsula University of Technology, 2016.<br>Polycyclic aromatic hydrocarbons (PAHs) are an alarming group of organic substances for humans and environmental organisms due to their ubiquitous presence, toxicity, and carcinogenicity. They are semi-volatile substances which result from the fusion of carbon and hydrogen atoms and constitute a large group of compounds containing two to several aromatic rings in their molecule. Natural processes and several anthropogenic activities involving complete or incomplete combustion of organic substances such as coal, fossi

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43

Butler, Joseph Edmund. "In-situ Fiber Strength Distribution in NextelTM 610 Reinforced Aluminum Composites." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/32433.

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MetPreg, a composite developed by Touchstone Research Laboratories (Tridelphia, WV), is an aluminum metal matrix composite reinforced by continuous NextelTM 610 alumina fibers. The question is, after processing, are the NextelTM fibers affected in any way that their strengthening contribution to the composite is reduced? From experimentation and statistical analysis, a strength distribution of pre-processed NextelTM 610 fibers is formed and an empirical correlation is developed relating strength to the observed flaw size on the failed single fibers. This correlation is then independently ap

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Robbins, Elizabeth, and Elizabeth Robbins. "The Role of Water Speedwell in the Distribution and Rates of Metal Removal from Pinal Creek, Near Globe, Arizona." Thesis, The University of Arizona, 2003. http://hdl.handle.net/10150/626939.

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Aquatic plants can be significant sinks for dissolved metals in metal contaminated streams. This study found water speedwell (Veronica anagallis aquatica) growing in Pinal Creek both bio-accumulates metals (Mn, Zn, Ni, and Co) and provides surfaces for metal precipitation. Analysis of plant tissue found that roots accumulate up to 80 g Mn/kg dry root, with the majority of metals associated with the external plant surface. Fine sediments around water speedwell colonies have 2-10 times higher metal concentrations than surrounding sediments. SEM photos of the plant surface show clum

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Kormos, Steven. "Metal distribution within Zone 39, a Proterozoic vein-type Cu-Ni-Au-Ag-PGE deposit, Strathcona Mine, Ontario, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0027/MQ46486.pdf.

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Zhu, Xiaoxiao. "Influence of hydrodynamics and correlation of metal contents with settling velocities on contamination distribution in a stormwater detention basin." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI035.

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Les bassins de retenue-décantation ont trois fonctions principales : stocker les eaux pluviales pour éviter les inondations, favoriser la décantation des polluants particulaires, éviter la remise en suspension et la remobilisation des polluants décantés vers l’aval. La conception et la gestion de telles installations nécessitent de connaître les caractéristiques hydrodynamiques, celles des sédiments et de pouvoir prédire les zones où les dépôts sont fortement contaminés. L’objectif principal de la thèse est d’identifier les zones où les teneurs en polluants sont élevées au niveau des sédiments

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Schröder, Henning [Verfasser], Thomas A. [Gutachter] Ternes, and Joachim [Gutachter] Scholz. "Distribution and mobility of metal(loid)s at the sediment water interface / Henning Schröder ; Gutachter: Thomas A. Ternes, Joachim Scholz." Koblenz, 2021. http://d-nb.info/1229919546/34.

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Bartos, Judith A. "Heavy metal distribution in Massachusetts soils /." 1994. https://scholarworks.umass.edu/theses/3444.

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Levesque, Chantal A. "Metal ion distribution in blood plasma : towards metallo-proteomics." Thesis, 2005. http://hdl.handle.net/2429/16617.

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Considering the immense involvement of metal ions in metabolism, protein structure, electron transfer, and their relation to health and disease, deciphering the mechanisms by which metals are stored, transported, sensed and incorporated within the human biosystem is imperative to further understand metal homeostasis and metal-related diseases. In this "omics" age, the emerging field of metallomics sets out to do just that. The metallome of a tissue, fluid, or cell includes aquated trace elements and their complexes with endogenous and induced biomolecules, including organic acids, sugars

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Li, Zhong-Xiang, and 李仲翔. "Metal Distribution in Humic Substances Affected By Biological Prcess." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/83484717428536839567.

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碩士<br>國立屏東科技大學<br>環境工程與科學系所<br>104<br>With appropriate treatment, agricultural waste and animal manure can be used as soil fertilizer, which avoids the loss of soil fertility during long-term cultivation. The humified wastes generate compost. In addition, a constructed wetland (CW) treatment is regarded as one of several biological treatment processes that can beneficially change the characteristics of dissolved organic matter (DOM). This study investigated optical characteristics and metal concentrations of composted humic substances (HS) in chicken manure as well as DOM in a CW. The compost

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