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Dissertations / Theses on the topic 'Trace element content'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

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1

Reyes, Delgadillo Dulce B. "Modeling natural attenuation of trace elements in soils." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101169.

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Trace elements added to the soil by human activities could contaminate it and occasionally cause a threat to environmental and human health. The toxicity and mobility of a trace element are affected by the element's solubility, which in turn is influenced by the soil properties. When mobile, trace elements can be leached out of the soil. If leaching occurs at a faster rate than atmospheric deposition, element concentrations in the soil will decrease by natural attenuation.<br>We analyzed soil properties in 40 soils and their soil solutions to obtain a set of equations with the most significant

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2

Lydia, Somers. "Trace element content variation within sulfides of the Fäboliden gold deposit." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72559.

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The Fäboliden gold deposit is an ore body in northern Sweden’s Bothnian Basin and has been the subject of studies and test mining since the early 2000s when the Gold Line, an area of anomalously high-Au glacial till in Northern Sweden, became a center of economic interest. The deposit is a hypozonal orogenic gold deposit that displays many characteristic features of ore bodies of this type, including the presence of compound sulfide grains composed of a core of löllingite surrounded by a rim of arsenopyrite, and an abundance of pyrrhotite throughout the deposit and surrounding alteration zon

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3

Voigt, Astrid. "Bioavailability of trace metals to plants." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19561.

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Soil quality guidelines are currently based on total trace metal loads. There is a need to define indices of bioavailability to allow reasonable predictions for plant metal uptake and toxicity in soils. Trace metal toxicities to plants often correlate best with free metal ion activities. The first objective was to develop a plant bioassay that is sensitive to trace metals at concentrations realistic for soils. The root elongation of lettuce Lactuca sativa 'Buttercrunch' was used as toxicological endpoint. This endpoint was sensitive and reproducible to environmentally relevant concentrations o

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4

El-Sayad, E. A. H. "Status of some trace elements in relation to the nature of the main sediments in the Fayoum (Egypt) depression." Thesis, University of Aberdeen, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384486.

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Chapter 1 of this thesis is a general review of published work o_ the origins and distribution of Cd, Cu, Fe, Mn and Zn in soils and their uptake and functions in plants. Chapter 2 is a synopsis of the geological history of the Fayoum of relevance to the origins of sediments at the study sties. Previous fractionation procedures, and a proposed modification to improve the determination of carbonate-bound elements are discussed in Chapter 3, while other analytical procedures are described in Chapter 4. Results of general soil analyses, of the fractionation analyses and useful correlation matrice

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5

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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6

Colomina, Muela Jose Maria. "Prenatal one carbon metabolism-gene interactions, placenta trace element content and their effect on pregnancy outcomes." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/441746.

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El metabolisme monocarbonat i els elements traça essencials afecten al desenvolupament i resultat de l'embaràs. Es desconeixen els efectes de diversos polimorfismes del metabolisme monocarbonat (MTHFR c.665C>T, BHMT c.716G>A, SLC19A1 c.80G>A i MTRR c.66A>G) durant l'embaràs i la seva possible modulació segons l'estat en folat; i quins factors estan associats amb les concentracions d'elements traça (zinc, coure, seleni i ferro) en la placenta. Aquests aspectes dels esmentats polimorfismes i elements traça s’han estudiat en 617 embarassos del Reus-Tarragona Birth Cohort i 218 placentes. Amb al

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7

Andrade, Marc-David. "Development of an on-site ex-situ unsaturated-flow remediation process for trace metal contaminated soils." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85117.

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Innovative means and methods were tested to develop an economical, pragmatic and environmentally sustainable soil remediation process for heavy metal contaminated soils. An unsaturated-flow soil washing procedure was devised to dissolve the soil-bound toxic heavy metals; the latter were extracted by a chemical washing solution that percolated through the soil matrix. Subsequently, the leached toxic heavy metals were selectively concentrated, by a chemical precipitation process, into a solid waste. Thereby, a fraction of the spent ethylenediaminetetraacetic acid (EDTA), within the washin

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8

Bush, Peter G. "Maternal cigarette smoking and placental function : morphology, oxygen diffusive capacity, amino acid and zinc transport, and trace element content." Thesis, University of Aberdeen, 1997. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU106462.

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Maternal smoking during pregnancy is known to result in an increased incidence of intra-uterine growth retardation. This in part may be due to deleterious effects on the placenta, which is the conduit between the mother and fetus. This study was designed to investigate the effect of maternal smoking on placental function: morphometry, oxygen diffusive capacity, trace element content (zinc and cadmium), microvillous border membrane (MVBM) vesicle zinc and alanine uptake, and placental enzyme activity. The magnitude of maternal smoking and confounding factors were determined twice by questionnai

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9

Siaka, I. Made, of Western Sydney Nepean University, and Faculty of Science and Technology. "The application of atomic absorption spectroscopy to the determination of selected trace elements in sediments of the Coxs River Catchment." THESIS_FST_XXX_Siaka_I.xml, 1998. http://handle.uws.edu.au:8081/1959.7/238.

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An investigation of heavy metal concentrations in sediments from Coxs River catchment, a tributary of the Hawkesbury-Nepean River system, has been undertaken. A number of digestion methods were assessed for the determination of Pb, Cu, Cd, Zn, Ni, Mn, Fe, Co and Cr in reference materials by flame AAS. The method that produced the best recovery is reverse aqua regia, HNO3-HC1 with ultrasonification followed by heating on a hotplate. Based on analysis of sediments from 133 sites, background concentrations were established. Elevated heavy metal concentrations were recorded in some samples. The th

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10

Angel, Adam M. "Influence of Solution Composition and Temperature on the Strontium Content of Amorphous Calcium Carbonate and Subsequent Calcite." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23714.

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The Sr/Ca ratios in calcium carbonate fossils are used by the paleooceanographic community to infer past environmental conditions, such as sea surface temperature and ocean chemistry. The processes of biogenic calcification that produce these chemical signatures are complex and not fully understood, however, and vital effects are known to affect the trace element composition of the CaCO3 biomineral products. The recent discovery that calcifying organisms produce amorphous calcium carbonate (ACC) as an intermediate phase during the crystallization process calls into question whether this pathwa

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11

VELICOGNA, MATTEO. "Zircon dating and trace element content of transparent heavy minerals in sandstones from the NE Alps and Outer Dinarides flysch basins." Doctoral thesis, Università degli Studi di Trieste, 2020. http://hdl.handle.net/11368/2961202.

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Il flysch è un particolare tipo di successione torbiditica che è generalmente considerata come un deposito marino sinorogenico di margini passivi. Generalmente è formato da un'alternanza di arenarie e marne/siltiti in strati sub-paralleli che possono essere più o meno ricchi di materiale carbonatico e fossili. Gli strati possono avere spessori variabili che dipendono fortemente dal tipo di sedimento e dallo stadio di sedimentazione. I bacini flyshoidi situati nella parte nordorientale della Placca Adria sono una tipica espressione di questo genere di corpi sedimentari presupponendo che si sian

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12

Taillon, Kate. "Modeling surface complexation relationships in forest and agricultural soil." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82435.

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The adsorption behaviour of trace metals in soil may provide us with a way to more accurately predict and assess the toxicity of metals in the environment. This thesis reports efforts to apply surface complexation modeling to agricultural and forest soil and to relate model parameters to common soil properties. This study considered Ca, Cd, Cu, Pb and Zn but the methods here could be applied to other metals. In Chapter 2, the surface charge and adsorption behaviour of a set of Ap horizons was characterised using back-titration and batch adsorption techniques. With the objective of simpl

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13

Reeves, Alastair Ian. "Contaminant tracking through dendro-chemical analysis of tree-radii." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69688.

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The research used dendro-chemical analysis of ash tree rings and current year leaf litter to track Cd, Pb, Zn, Cu, Mn, Cr, and Sn spread and cycling from a closed garbage dump-toxic waste site. This technique allowed for determination of areal extent, contaminant levels and time period of initial contaminant contact. Only Zn, Sn, and Cu were found in elevated quantities in the xylem wood and Pb in the leaf litter. Elemental concentrations of Pb, Sn and Cd in xylem wood and leaves of ash were positively correlated. Tin was the only element to demonstrate a clear initial contact period and eleme

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14

MacDonald, James Douglas. "The partitioning of Cd, Cu, Pb and Zn between the solid and solution phase of forest floor horizons in podzolic soils near metal smelters /." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85575.

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The emission of trace metals (TMs) into boreal forest regions of the northern hemisphere is an important environmental issue due to their potential detrimental impacts on these sensitive ecosystems. One of the foremost factors controlling metal cycling is the chemistry of the overlying organic forest floor of the forest soil. In this thesis we examine the chemistry of forest floor horizons of podzolic soils. Our goal is to improve our ability to predict the partitioning of metals between the soil solid and solution phases.<br>We developed a standard protocol to produce solutions that re

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15

Ayres, Bianca Maira Teixeira 1985. "Obtenção de acrilatos de frutose por biocatalise." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266983.

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Orientadores: Telma Teixeira Franco, Gustavo Paim Valença<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-15T16:00:27Z (GMT). No. of bitstreams: 1 Ayres_BiancaMairaTeixeira_M.pdf: 702836 bytes, checksum: 9d7d2a539cf470dfe7892bf64c17518d (MD5) Previous issue date: 2010<br>Resumo: O presente trabalho estudou as melhores condições para a produção de monoacrilato de frutose a partir da esterificação de ácido acrílico com D-frutose catalisada pela lípase comercial de Cândida antárctica (Novozyme 435). O interess

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16

Siaka, I. Made. "The application of atomic absorption spectroscopy to the determination of selected trace elements in sediments of the Coxs River Catchment." Thesis, View thesis, 1998. http://handle.uws.edu.au:8081/1959.7/238.

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An investigation of heavy metal concentrations in sediments from Coxs River catchment, a tributary of the Hawkesbury-Nepean River system, has been undertaken. A number of digestion methods were assessed for the determination of Pb, Cu, Cd, Zn, Ni, Mn, Fe, Co and Cr in reference materials by flame AAS. The method that produced the best recovery is reverse aqua regia, HNO3-HC1 with ultrasonification followed by heating on a hotplate. Based on analysis of sediments from 133 sites, background concentrations were established. Elevated heavy metal concentrations were recorded in some samples. The th

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17

Dalbeck, Paul C. "Crystallography, stable isotope and trace element analysis of Mytilus edulis shells in the context of ontogeny." Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/1870/.

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Living systems exert exquisite control over biomineral production determining mineral type, polymorph, morphology and ultrastructure and ultimately producing biomineral structures that perform a range of functions. In addition to this biological control, the environment also influences aspects of biomineralisation. In marine invertebrates, biominerals record seawater chemistry and temperature at deposition. Past chemistry and temperature information is interpreted via proxies such as oxygen isotope and Mg/Ca ratios in calcium carbonate biominerals and used to help predict future climatic trend

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18

Munsel, Dirk [Verfasser], and T. [Akademischer Betreuer] Neumann. "Utilisation of trace element contents in benthic foraminifera for reconstructing sea water composition / Dirk Munsel. Betreuer: T. Neumann." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1047383527/34.

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19

Jain, Ashish. "Discrete Element Modeling of Railway Ballast for Studying Railroad Tamping Operation." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/91438.

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The development of Discrete Element Model (DEM) of railway ballast for the purpose of studying the behavior of ballast particles during tamping is addressed in a simulation study, with the goal of optimizing the railroad tamping operation. A comprehensive literature review of applicability of DEM techniques in modeling the behavior of railway ballast is presented and its feasibility in studying the fundamental mechanisms that influence the outcome of railroad tamping process is analyzed. A Discrete Element Model of railway ballast is also developed and implemented using a commercially availabl

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20

Antcibor, Iuliia [Verfasser], and Eva-Maria [Akademischer Betreuer] Pfeiffer. "Content, Distribution, and Translocation of Trace Elements in Permafrost-Affected Environments of the Siberian Arctic / Iuliia Antcibor. Betreuer: Eva-Maria Pfeiffer." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1058681990/34.

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21

TEZZON, ENRICO. "Static analysis and delamination of structures in adhesive contact with an elastic half-plane using a coupled FE-BIE model." Doctoral thesis, Università degli studi di Ferrara, 2016. http://hdl.handle.net/11392/2403216.

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Travi, telai o lastre in perfetta aderenza con un isotropo od ortotropo substrato sono stati analizzati per mezzo di un metodo agli elementi finiti con equazioni integrali al contorno (FE-BIE). Il confronto del comportamento di una trave rigida è realizzato con soluzioni disponibili in forma chiusa per problemi di contatto su un indentatore rigido. Una varietà di esempi pratici sono rappresentati per dimostrare l'efficacia del modello proposto, facendo uso della funzione generalizzata di Green per il semipiano. Inoltre, il presente metodo è stato investigato assumendo una "interfaccia debole"

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22

Ginnever, Rhoda C. "Soil and plant contents of lead and other trace elements with special reference to the influences of parent rock and pollution." Thesis, Aberystwyth University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324309.

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23

Gu, Xiaoyan. "Melt-rock interaction signatures in peridotite from sub-continental mantle (French Massif Central) : A trace element, H, Li and δ7Li approach". Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0052/document.

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Des xénolites de péridotite provenant de deux localités du sud du Massif Central Français (Allègre et Mont Coupet), émis avec des modes éruptifs différents, ont été étudiés pour définir l’évolution du manteau sous continental et pour étudier le comportement de Li et H lors des réactions fluides roches lors de leur remonté vers la surface. Un ensemble de 6 xénolites représentatifs a été sélectionné pour chaque localité. La description pétrologique et minéralogique de chaque échantillon a été associée à la mesure des compositions chimiques en éléments majeur (par microsonde électronique) et trac

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24

Oshurko, A. P. "Quantitative characteristics of bone tissue of the human maxilla in the construction content of trace elements (K, Fe, Co, Sr, Zn) in the dynamics of prenatal ontogenesis." Thesis, БДМУ, 2020. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/17548.

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25

Chantachume, Yodsaporn. "Genetic studies on the tolerance of wheat to high concentrations of boron." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phc459.pdf.

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Bibliography: leaves 213-245. Genetic control of tolerance to boron was investigated between a moderately tolerant variety, Halberd, a tolerant line G61450 and the moderately sensitive varieties Schomburgk and Condor.

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26

Naude, Francois Paulus. "Development of a methodology for calculating stresses in track components." Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-07282005-090746.

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27

Bagheri, Kazemabad Abdolreza. "Boron tolerance in grain legumes with particular reference to the genetics of boron tolerance in peas." Title page, summary and contents only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phb144.pdf.

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28

Casetta, Marine. "Impact et devenir des retombées de poussières industrielles sur les sols de Gravelines (Nord, France)." Electronic Thesis or Diss., Littoral, 2023. https://documents.univ-littoral.fr/access/content/group/50b76a52-4e4b-4ade-a198-f84bc4e1bc3c/BULCO/Th%C3%A8ses/LOG/CASETTA%20Marine/124787_CASETTA_2023_archivage_Partie1.pdf.

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En zone urbaine ou industrialisée, la qualité des sols est particulièrement impactée par les émissions chroniques de contaminants. Pourtant, ces écosystèmes fragiles et fondamentaux sont non renouvelables à échelle de vie humaine, et leur préservation est essentielle pour répondre aux enjeux sanitaires et environnementaux actuels. Ce travail apporte de nouveaux éléments de connaissance sur la contamination métallique de sols urbain soumis à des retombées de poussières industrielles. Il s'intéresse particulièrement à la ville de Gravelines, située en bordure nord-ouest de l'agglomération dunker

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29

Tukur, Aminu. "Antimony and acetaldehyde migration from Nigerian and British PET bottles into water and soft drinks under typical use conditions : concentration of migrants and some trace elements in polyethylene terephthalate and in bottled contents." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5369.

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Also aged bottles are safer to use than new bottles because their chemical leaching was found to be lower than that of new bottles. This study recommends the reassessment of the absence of international guidelines for acetaldehyde in water and foods. The study also recommends that the amount of acetaldehyde that can be added to soft drinks as flavouring agent should be below the specific migration limit (SML) for migration of acetaldehyde from PET bottle into bottle contents. This is essential since the SML was designed to ensure that exposure to acetaldehyde, as a result of intake of bottled

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30

Giner, Navarro Juan. "Advances Techniques for Time-Domain Modelling of High-Frequency Train/Track Interaction." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90637.

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[EN] The aim of the present Thesis is to develop models for the study of very high-frequency phenomena associated with the coupling dynamics of a railway vehicle with the track. Through these models, this Thesis intends to address squeal noise as a particular case of rolling noise when the train negotiates a small radius curve. Wheel/rail interaction is the predominant source of noise emission in railway operations. Rolling contact couples the wheel and the rail through a very small area, characterised by strongly non-linear and non-steady state dynamics that differentiates rolling noise from

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31

Gras, Thibaut. "Couplage de méthodes d'éléments finis standards (FEM) et ondulatoires (WFEM) pour le calcul de la réponse vibratoire d'une voie ferrée." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2372/document.

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La prédiction du bruit de roulement ferroviaire est en enjeu majeur pour la maitrise des nuisances sonores. Au point de contact roue/rail, la roue et la voie sont excités de manière dynamique, ce qui enclenche le rayonnement du bruit de roulement. Les réponses vibratoires au point de contact ainsi que les taux de décroissance des ondes sont des données primordiales pour simuler de manière précise le bruit de roulement. Or, la dimension infinie de la voie ferrée conduit bien souvent à des modèles éléments finis coûteux et non adaptés à la recherche de solutions innovantes. La thèse a pour objec

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Afriad, Mustapha. "Développement de modèles d’essieu ferroviaire en interaction dynamique avec la voie." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2453.

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Jusqu'à présent les modèles multi-corps d'interaction véhicule-voie ferroviaire utilisent principalement des composants rigides. De tels modèles présentent l’avantage d’un nombre de degrés de liberté limité permettant de réaliser des calculs en temps réel à basses fréquences. En revanche, ils ne permettent pas de prédire avec suffisamment de précision les spectres des efforts de contact roue-rail en raison de l’hypothèse d’éléments rigides qui est assez forte. Aussi ces modèles gagneraient à être améliorés en prenant en considération la flexibilité des éléments. Ceci est possible grâce au coup

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Hotton, Veronica K. "Assessment of trace element contamination in streambed sediment and spatial associations in Palolo Valley watershed, Honolulu, Oʻahu, Hawaiʻi". Thesis, 2005. http://hdl.handle.net/10125/11632.

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Chwialkowski, Natalia Ewa. "Novel approaches in determining baseline information on annual disposal rates and trace element content of U.S. coal combustion residues : a response to EPA’s June 2010 proposed disposal rule." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2386.

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Although products of coal combustion (PCCs) such as coal ash are currently exempted from classification as a hazardous waste in the United States under the 1976 Resource Conservation and Recovery Act (RCRA), the U.S. Environmental Protection Agency (EPA) is now revising a proposed rule to modify disposal practices for these materials in order to prevent contamination of ground- and surface water sources by leached trace elements. This paper analyzes several aspects of EPA’s scientific reasoning for instating the rule, with the intent of answering the following questions: 1) Are EPA’s cited va

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35

Kuo-Cheng, Lin, and 林國誠. "Mineral and Trace Element Contents of Hospital Diets." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/62167176455047632944.

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碩士<br>輔仁大學<br>營養科學系<br>96<br>Regarding the quantity of minerals and trance element contents in a diet is unable to be comprehensive during to insufficient of food nutrient data base and limited of the calculation tools in Taiwan. Dietitians could focus mostly on the aspects of calorie, carbohydrate, protein and fat requests in a diet plan or nutrition education for sickness. In general the mineral and trace element contents of foods depend largely on the mineral contents of the water source and soil where those foods grow. Since the hospital diet belongs to the quantitative food preparation,

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Chen, Chia-Fen, and 陳佳芬. "Depositional implications of Sulfur and trace element contents in Shihti coal." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/30395102988100366908.

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碩士<br>國立中央大學<br>應用地質研究所<br>89<br>The distribution of sulfur and trace element in coal is controlled by the depositional environment of peat. Four high volatile bituminous coal samples were collected from the Shihti Formation, northern Taiwan. Their sulfur and trace element contents were analyzed according to ASTM procedures. The analytic results indicate a reductive, littoral to brackish environment. The high pyrite contents can lead to the enrichment of B, As, Tl, with enrichment factors reaching 100. The depositional environment of Lifeng, Yufeng, and Anshuen mines were concluded

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Wu, Chao-Hao, and 吳昭豪. "The study of trace element contents in eggs of marine crustacean and fish." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/14709949230629570170.

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碩士<br>國立臺灣海洋大學<br>海洋環境資訊系<br>102<br>The concentrations of trace elements in eggs of five crustacean (Portunus trituberculatus、Thalamita crenata、Charybdis feriatus、Parapenaeus fissuroides、Bathysquilla crassispinosa) and four fishes (Mugil cephalus、Miichthys miiuy、Cypselurus poecilopterus、Ephippus orbis) were determined in the present study. The eggs of these analyzed organisms were digested by strong acid at the water bath and the contents of trace elements were analyzed by the ICP-MS. The analyzed results showed that the concentrations of the trace elements ranged within 0.000027-374.1 mg/kg.

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CHU, CHEN NIEN, and 陳念祖. "Macro and trace element contents in soils and plants of a serpentine ecosystem." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/24443051669440788743.

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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>99<br>Serpentinitic soils from ultramafic parent rocks are characterized by low availability of N, P, K, and Ca/Mg and extremely high contents of heavy metals like Cr, Co, and Ni. These metal levels in the serpentinitic soils can be much higher than the soil pollution control standards (SPCS) of Taiwan. Additionally, low contents of Si and Ca causes to poor growth of general plants. The heavy metals in the serpentinitic soils are not anthropogenic, but they have potential risk to ecosystem and human health. Therefore, this study selected an abandoned site of serp

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"Study on the effective contents of trace elements in Chinese mineral drugs." 1998. http://library.cuhk.edu.hk/record=b5889668.

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by Leung Ho-yin.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1998.<br>Includes bibliographical references.<br>Abstract also in Chinese.<br>Acknowledgement --- p.i<br>Abstract --- p.ii<br>Table of Contents --- p.iv<br>List of Tables and Figures --- p.v<br>Chapter Chapter 1 --- Introduction --- p.1<br>Chapter Chapter 2 --- Methodology --- p.12<br>Chapter Chapter 3 --- Experimental --- p.17<br>Chapter 3.1 --- Sample Collection --- p.17<br>Chapter 3.2 --- Preliminary Sample Treatment --- p.18<br>Chapter 3.3 --- Dissolution Test Apparatus --- p.18<br>Chapter 3.4 --- Reagents ---

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"Potentially harmful trace elements (PHTEs) in the groundwater of Greater Giyani, Limpopo Province, South Africa: possible health implications." Thesis, 2015. http://hdl.handle.net/10210/15089.

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M.Sc. (Geology)<br>Most rural communities in developing countries rely on borehole water as their only source of water. Since borehole water comes from underground, it is often considered pure and clean, but this is frequently not the case. Groundwater contains certain amounts of trace elements that may become deleterious to human health. The objectives of this investigation were to assess the concentration levels of Potential Harmful Trace Elements (PHTEs) and their spatial distribution patterns in borehole water in the Greater Giyani area of Limpopo, South Africa, and the potential human hea

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Lin, Ju-Ru, and 林育如. "The effect of various boilery on the contents of trace elements in infusion of Chinese herbal prescription." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/58377556334916519739.

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碩士<br>國立嘉義大學<br>食品科學系碩士班<br>92<br>Herbal medicine has been used for thousands of years as diseases curing agents for Chinese people. Nowadays, Chinese herbal medicine serves more diverse purposes, such as health foods for promoting health status for the general public. Traditionally, herbal ingredients are soaked in water and subsequently decocted for hours to reach consumable form. During the decocting process, many chemical and physical changes occur simultaneously. In addition, the container used to decoct might have profound effects on the effectiveness of herbal medicine. The purpose of t

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Masse, Jacynthe. "Contenu total en éléments traces de sols forestiers du Québec méridional." Thèse, 2011. http://hdl.handle.net/1866/5461.

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Les sols forestiers constituent un réservoir considérable d’éléments nutritifs disponibles pour soutenir la productivité forestière. Ces sols contiennent aussi une quantité, encore inconnue à ce jour, d’éléments traces biodisponibles provenant de sources anthropiques ou naturelles. Or, plusieurs de ces éléments recèlent un potentiel toxique pour les organismes vivants. Ainsi, la quantification de la concentration et du contenu total en éléments traces des sols forestiers s’avère nécessaire afin d’évaluer les impacts des perturbations sur la qualité des sols. Les objectifs de ce projet de rech

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Bagheri, Kazemabad Abdolreza. "Boron tolerance in grain legumes with particular reference to the genetics of boron tolerance in peas / Abdolreza Bagheri Kazemabad." Thesis, 1994. http://hdl.handle.net/2440/21513.

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Crewe, Julie R. "Analysis of Mercury Concentrations in Indiana Soil to Evaluate Patterns of Long-Term Atmospheric Mercury Deposition." Thesis, 2013. http://hdl.handle.net/1805/3199.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Mercury (Hg) has proven to be a risk to the public, mainly through the consumption of fish. Because of this, many fish consumption advisories have been issued in Indiana. Although much is known about the global cycle of mercury, little is known about how local and regional emission sources of mercury impact local and regional mercury cycling. This study’s objective was to determine the scope of mercury concentration in central Indiana by using a broad grid of soil mercury measurements. Sampling was designed to capture the net retaine

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