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Dissertations / Theses on the topic 'Zinc-chromium'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Brooke, Ian William. "The electrodeposition of Tin/Zinc, Tin/Chromium and Tin/Zinc/Chromium alloys." Thesis, Glasgow Caledonian University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426444.

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The electrodeposition of tin/chromium and tin/zinc/chromium is a new field of research. This field was investigated because it may be of commercial, as well as scientific, interest if a range of alloy compositions could be sustainably deposited from environmentally acceptable electrolytes. With no published work to guide this research difficulties were encountered in producing sustainable deposition procedures. A novel electrolyte that deposited tin/chromium alloys in a range of compositions was produced. This electrolyte was adjusted to produce novel tin/zinc/chromium deposits in a range of c

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2

Berry, Patrick A. "Versatile Chromium-Doped Zinc Selenide Infrared Laser Sources." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1271776256.

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3

McDaniel, Sean A. "Seeded, Gain-switched Chromium Doped Zinc Selenide Amplifier." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1343760359.

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4

Chapaneri, Roshan. "A study of hexavalent and trivalent chromium conversion coatings on zinc surfaces." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6690.

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Physical, chemical and corrosion properties of a hexavalent chromium conversion coating (CCC) and that of a commercial third generation trivalent chromium system; Tripass LT1500, on zinc electrodeposited steel has been studied. Moreover, the role of additives has been studied to elucidate film formation and corrosion resistance mechanisms. Micro-cracking and self-repair corrosion protection behaviour commonly associated with hexavalent CCCs has also been investigated. Scanning Electron Microscopy (SEM) studies showed that for both hexavalent and trivalent CCCs were in general, flat with a sphe

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5

Doyle, David Joseph. "Novel zinc and chromium complexes for the copolymerisation of epoxides with CO2." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497672.

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6

Su, Yongjie. "The electrodeposition of zinc-chromium alloys and their properties for corrosion protection." Thesis, Glasgow Caledonian University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386294.

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7

Van, Bibber-Krueger Cadra. "Mineral supplementation of feedlot cattle." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32646.

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Doctor of Philosophy<br>Department of Animal Sciences and Industry<br>James S. Drouillard<br>Four studies evaluated effects of mineral supplementation on feedlot performance, carcass characteristics and ruminal fermentation of finishing cattle. Study 1 supplemented 0 or 3.3 g/d yeast combined with Cr propionate to steers separated into light and heavy groups. No treatment x weight group interactions were observed for ADG, DMI, final BW, carcass traits, or plasma glucose of lactate concentrations (P ≥ 0.06). A treatment x weight group interaction was observed for G:F (P = 0.03). In study 2, ste

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8

Hesamedini, Sanaz [Verfasser], Andreas [Akademischer Betreuer] Bund, Uwe [Gutachter] Ritter, and Sannakaisa [Gutachter] Virtanen. "Trivalent chromium based conversion coatings containing cobalt on the zinc plated steel / Sanaz Hesamedini ; Gutachter: Uwe Ritter, Sannakaisa Virtanen ; Betreuer: Andreas Bund." Ilmenau : TU Ilmenau, 2020. http://d-nb.info/1221960423/34.

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9

Asselin, Julie. "Design of a flow-through extraction cell for rapid determination of toxic metals (arsenic, cadmium, chromium, copper, mercury, lead, tin, zinc) from soils and sediments." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115838.

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The goal of this study was to design, characterize and test a flow-through extraction cell for rapid determination of toxic metals present in soil and sediment samples.<br>Based on a design elaborated by Jean Bouffard, a Teflon cell was first machined, but it appeared to be leaky and hard to disassemble without breaking the fritted glass discs. To overcome these difficulties, a poly ether ether ketone (PEEK) cell was machined and several parts were modified. Even though the shape and seal of the components seemed to be affected when heated, the cell was working at room temperature and proved p

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10

Walker, Justin I. "Spectroscopic Analysis of Materials for Orthopaedic and Energy Conversion Applications." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1226948982.

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11

Fillis, Ismarelda Rosaline. "Determination of Chromium(VI), Vanadium(V), Selenium(IV) and Zinc(II) in the City of Cape Town's potable water by stripping voltammetry at boron doped diamond electrodes." University of the Western Cape, 2011. http://hdl.handle.net/11394/5417.

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>Magister Scientiae - MSc<br>The main aim of this study is to investigate theelectrochemical determination of two beneficial (selenium and zinc) and two toxic (chromium and vanadium) metals in the potable water within the City of Cape Town's distribution area. The Water Laboratory of the City's Scientific Services Branch analyses for these metals in their elemental state, using the Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES). This is a standard method used for the detection of trace metals. The most sensitive voltammetric method for determining these metals is by a

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12

Nordin, Andreas. "Heavy metal removal from sewage sludge by pyrolysis treatment." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-8807.

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Sewage sludge is the product from wastewater treatment that mostly is considered as a waste material. However, it contains several nutrients, especially phosphorus, potassium and nitrogen which are excellent fertilizers. The downside is the harmful content it also carries with pathogens, heavy metals and a variety of organic pollutants that in many cases have unknown effects on the ecosystem. A possible solution to this problem could be to pyrolyse the sewage sludge and by that decrease the levels of heavy metals and also render both pathogens and organic pollutants harmless. In this thesis pr

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13

SORDO, FILHO GIOVANNI del. "Estudo da adsorção de íons metálicos em caulinita para água de reuso." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26394.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-06-22T14:16:56Z No. of bitstreams: 0<br>Made available in DSpace on 2016-06-22T14:16:56Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado em Tecnologia Nuclear)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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14

Fenolio, Dante Bruce. "Addressing Amphibian Decline Through the Amphibian Conservation Action Plan." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/422.

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The amphibian decline phenomenon now involves in excess of a third of the roughly 6000 species of amphibians on the planet. The problems that drive the declines are diverse with no end in sight. The Amphibian Conservation Action Plan (ACAP) aims to stem amphibian decline through four recommended actions by researchers and conservation biologists: (1) Expand scientific understanding of amphibian declines and extinctions; (2) continue to document amphibian diversity and ecology and how they are changing; (3) develop and implement long-term conservation programs; (4) prepare emergency response

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15

Burris, Karen R. "Heavy Metal Soil Concentrations in the Urban Toledo, Ohio Area: Legacy of Human Activities." Bowling Green State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1610108035866699.

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16

Naginienė, Rima. "Žmonių plikimas ir mikroelementų pusiausvyros sutrikimas: priežastys ir reikšmė." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20051020_122618-76933.

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1. ŽODYNAS, SIMBOLIAI IR SANTRUMPOS Alopecia – alopecija, plaukų iškritimas, jų netekimas, slinkimas, plikimas, plikumas, plikis Alopecia areata – lizdinis, židininis plaukuotosios galvos dalies ar kitų kūno vietų (blakstienų, antakių, gaktos, pažastų ir kt.) plaukų iškritimas, plikimas Alopecia barbae – vyrų barzdos ir ūsų plikimas Alopecia diffusa – difuzinis, išsklaidytas plikimas Alopecia totalis – visų galvos plaukų netekimas, plikumas, plikis Alopecia universalis – visiškas ar dalinis galvos plaukų netekimas, lydimas dalinio ar visiško kitų kūno vietų plaukų iškritimo; plikumas, plikis

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17

Henry, Heather Fort. "Natural Revegetation of an Aged Petroleum Landfarm Impacted With Polycyclic Aromatic Hydrocarbons (PAHs) and Heavy Metals (Cr, Pb, Zn, Ni, Cu): Ecological Restoration, Remediation, and Risk." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1100890826.

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18

Solastiouk, Pierre. "Application de l'extraction liquide-liquide au traitement et a la revalorisation d'effluents industriels." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13140.

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Proposition d'une nouvelle approche de l'elimination des effluents des ateliers de traitement de surface. Separation zinc/nickel en solution concentree et separation du chrome hexavalent dans des effluents chromates

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19

Saifi, Ali. "Contribution à l'étude des propriétés magnétiques des systèmes spinelles isolants CdCr2xIn2-2xS4 et ZnCr2xGa2-2xO4 : phases type verre de spin." Paris 6, 1986. http://www.theses.fr/1986PA066519.

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Ces systèmes présentent la percolation et la frustration. Le premier composé est ferromagnétique, tandis que le second présente des interactions antiferromagnétiques. On étudie en fonction de x les transitions de ces composés. Les transitions de phase du gallate ont été étudiées par effet Mössbauer. On a mis en évidence que pour x0,75 l'ordre magnétique tend vers un ordre caractéristique de la "vraie" phase verre de spin.

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20

Lesoin, Sapho. "Migration cationique et anionique des métaux toxiques (plomb, chrome et zinc) dans les sols sous l'effet d'un champ électrique." Phd thesis, Marne-la-vallée, ENPC, 1997. http://www.theses.fr/1997ENPC9728.

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L’objectif de cette étude est de déterminer les processus physico-chimiques intervenant sur l'efficacité du transport de métaux lourds dans les sols soumis à un champ électrique. Les polluants métalliques peuvent sous l'effet d'un champ électrique se déplacer par migration dans un milieu poreux. Le passage du courant électrique dans un sol sature en eau provoque la formation des espèces h#3o#+ et oh# par électrolyse de l'eau. Ce mécanisme modifie les valeurs du ph du milieu et entraine une solubilisation ou une précipitation des métaux lourds sous forme d'hydroxydes. Sous des conditions de ph

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21

Shen, C. M., and 沈忠明. "A study of Cadmium Telluride doped Zinc or chromium." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/02043971556678192043.

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碩士<br>國立臺灣科技大學<br>工程技術研究所<br>83<br>The crystals of Cadmium Telluride had been grown by heater method (THM) and solution growth method,then studied by EDS,XRD, EER and FTIR. The result of experiments is that CdTe doped Zn is formed a ternary compound Zinc Cadmium Telluride（ZnxCd1-xTe ）.Its energy gap is largerthan CdTe,and lattice constant less than CdTe.CdTe doped Cr has not any obvious change in energy gap or transmitance spectrum in NIR is broadening when the concentration of Cr increases

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22

Sun, Shih-Wei, and 孫世緯. "Phytoremediation of zinc, lead, copper, and chromium in contaminated soils." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/26901346267402892534.

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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>103<br>Nowadays the technology of phytoremediation for contaminated sites with heavy metals is better than traditional chemical approaches. However, most of the research on phytoremediation is in experimental stage and trying out pot culture as the experiment. The effects of phytoremediation in contaminated site not only can maintain the original characteristics and quality of the soil but also avoid causing the great damage of the properties of the soil. The study area is located at a waste dumping site in southern Taiwan and has been performed the experiment of

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23

Chen, Chen-Tsao, and 陳貞造. "Study on Processing Parameters of Yellow Zinc Galvanizing Process by Trivalent Chromium." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/nkfzy6.

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碩士<br>國立彰化師範大學<br>電機工程學系<br>105<br>Galvanized parts as the underlying corrosion treatment have better anti-corrosion effect. Also, the anti-corrosion ability can be enhanced if the film formation process is subjected to electrical galvanized surface. Film formation process of the present technology is divided into hexavalent and trivalent chromium, hexavalent chromium is toxic and will cause harm to humans and the environment, and trivalent chromium is not only non-toxic and harmless to human body, is also easier to handle wastewater, not a burden on the environment. So trivalent chromium chem

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24

Chu, Hsun-Chih, and 朱訓智. "The Transport and Retention Mechanisms of Zinc and Chromium in Stratified Soils." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/23178274834462833052.

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碩士<br>國立屏東科技大學<br>環境工程與科學系<br>90<br>Due to the adsorption of pollutants by soils, heavy metals have been found to accumulate in surface horizons of uniform soils and decrease with increasing depth. However, the transport and accumulation of metals in the stratified soils formed as a result of the pavement of in situ soils with sand materials during construction of plant at industrial area may be different. The Zn- and Cr-contaminated soils used in this study were sampled from an abandoned plant at southern Taiwan to investigate the accumulation characteristics of these two elements. The result

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25

Li, Ching-Yu, and 李清玉. "Trivalent Chromium Conversion on the Zinc Plate with Additives for Anti-Corrosion Ability." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/67436623936643501722.

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碩士<br>高苑科技大學<br>化工與生化工程研究所<br>97<br>The pure zinc film was prepared by a simple zinc plating solution. In this work，the pure zinc film was conversed trivalent chromium layer to from a passive film. The trivalent chromium coating was measured Tafel plot，XRD、SEM、EDX and thickness for a better anti-corrosion ability. The composition of trivalent chromium plating solution contains K2Cr2(SO4)6，oxalic acid，NaNO3 and NaCl. The pH values is increased by consuming H+ ions，when the Zn2+ ions and Cr3+ ions are formed as metal hydroxide to lead a rough and bad trivalent chromium layer. For preparting a be

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LU, YI TSEN, and 陸奕岑. "Study of Trivalent Chromium Conversion on the Zinc Plate for Anti-corrosion Ability." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/35163787304219347597.

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碩士<br>高苑科技大學<br>高分子環保材料研究所<br>96<br>The pure zinc film was prepared by a simple zinc plating solution. In this work, the pure zinc film was coated trivalent chromium layer to display by passive film. The passive film of trivalent chromium coating was measured tafel plot, cyclic voltammetry, XRD、SEM、EDX and thickness to disclose a trivalent chromium layer with high corrosion resistance. The composition of trivalent chromium plating solution contains K2Cr2(SO4)6, oxalic acid, NaNO3 and NaCl. The pH values is increased by consuming H+ ions, when the Zn2+ ions and Cr3+ ions are formed as metal hyd

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27

Chang, Hung-Wei, and 張弘緯. "Effect of Chromium, Zinc Additions on Capacitive Properties of Spray Pyrolyzed Manganese Oxide." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/48227736378312873899.

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碩士<br>逢甲大學<br>材料科學所<br>98<br>In the present research, Mn-oxide powders with a hollow spherical structure were prepared by spray pyrolysis (SP) at temperatures of 400 and 500 ?aC (SP400, SP500) for the applications of supercapacitor electrode. The resulting powders were collected by electrostatic deposition technique, and subsequently deposited onto graphite substrates by electrophoresis deposition (EPD) method for the investigations of pseudocapacitive properties. Furthermore, small amounts of chromium acetate or zinc acetate (0, 1, 2, 5, 10 at.%) were respectively added into the precursor sol

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Hasan, Mohammad Mehedi. "Use of surfactants to remove chromium (VI), nickel (II) and zinc (II) from sandy soil." Thesis, 2006. http://spectrum.library.concordia.ca/9170/1/Hasan_M_2006.pdf.

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The present study focuses mainly on the efficiency of surfactants sodium dodecyl sulfate (SDS), sodium dioctyl sulfosuccinate (AOT) and Triton X-100 (Tx-100) for the extraction of heavy metals Cr (VI), Ni (II) and Zn (II) from an artificially contaminated sandy soil. In addition, it also discusses metal extraction by a complexing agent EDTA with or without the addition of surfactants. To investigate metal extraction efficiency, both batch and column studies were performed. In batch studies, all surfactants are found to be nearly 2 to 3 times more effective for Cr (VI) removal, 3.0 to 6.2 times

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29

Liu, Cheng-Chung, and 劉鎮宗. "Removal of Chromium, Copper, Zinc and Nickel from Aqueous Solutions Using Wine Processing Waste Sludges." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/41539917753346105684.

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博士<br>臺灣大學<br>農業化學研究所<br>96<br>Wine processing waste sludge (WPWS) has been shown to be an effective sorbent for sorption of some heavy metals, but the properties of WPWS and sorption mechanism of heavy metal by WPWS were remained obscured. This study aimed to (i) examine the characteristics of WPWS; (ii) explore the sorption mechanism of WPWS for heavy metals; (iii) determine the effects of temperature, initial concentration of metals and different particle sizes on the adsorption reaction; and (iv) conduct the competitive adsorption by batch and fixed-bed columns methods using Cr, Cu, Zn and

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Huang, Yu-Chi, and 黃昱綺. "Amine-modified Zinc-based Metal Organic Framework for Photocatalytic Reduction of Hexavalent Chromium from Water." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/25g5rc.

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碩士<br>中原大學<br>化學工程研究所<br>106<br>Among common industrial wastewater containing organic dyes, heavy metal ions and other contaminants, hexavalent chromium (Cr(VI)) is one of the most toxic and carcinogenic species to the environment and human. For industrial wastewater treatments, membrane filtration, ionic exchange, adsorption method, and photocatalytic reduction are widely used. In the past decades, photocatalytic reduction method can be regarded as the most harmless and effective approach to remove heavy metal ions in the wastewater. Zeolitic imidazolate frameworks (ZIFs), a typical structure

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Wu, Chun-Hung, and 吳駿泓. "Electrodeposited Zinc-Nickel/Chromium Binary Coating and Its High Temperature Protection Properties for Direct Hot Stamping Steels." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/46185242896668948039.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>102<br>Electrodeposited cadmium layer had provided excellent cathodic protection under serious marine conditions and expressed bright metallic color. Nowadays, the electrodeposited zinc and zinc-based coatings have been extensively applied in general auto industries as replacements for cadmium, which was found carcinogenic in many previous literatures. Chromium is the main alloy element to be added in stainless steel to form a compact chromium oxide above the surface, which retards Fe2+ ions diffusing through the oxide, thus slows down the oxidation rate. In this

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LIN, GAO-YONG, and 林高永. "A study on the movement of copper, zinc and chromium with municipal solid waste leachate in the soils." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/58915163140589440106.

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Chuang, Wen-Hua, and 莊文華. "Relative orbital energy level comparison of zinc (Ⅱ),nickel (Ⅱ), chromium (Ⅱ) and iron (Ⅱ) porphyrin sensitized dye." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/24528644572077053006.

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碩士<br>淡江大學<br>化學學系碩士班<br>97<br>In this study, the metal ions in the central of major compound respectively are zinc (II), nickel (II), chromium (II) and iron (II) with close shell configurations, and all of these can all be found out the crystal data of four coordinations structure of having square planar data on the cultural heritage. Therefore, we can make use of this structure that may be formed to discuss, calculate and compare mutually, and that can achieve the purpose of evaluating before the chemistry molecule hasn’t been synthesized. We take advantage of the B3LYP calculation to mutual

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Bargheer, D., A. Giemsa, B. Freund, et al. "The distribution and degradation of radiolabeled superparamagnetic iron oxide nanoparticles and quantum dots in mice." 2015. http://hdl.handle.net/10454/9309.

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No<br>(51)Cr-labeled, superparamagnetic, iron oxide nanoparticles ((51)Cr-SPIOs) and (65)Zn-labeled CdSe/CdS/ZnS-quantum dots ((65)Zn-Qdots) were prepared using an easy, on demand, exchange-labeling technique and their particokinetic parameters were studied in mice after intravenous injection. The results indicate that the application of these heterologous isotopes can be used to successfully mark the nanoparticles during initial distribution and organ uptake, although the (65)Zn-label appeared not to be fully stable. As the degradation of the nanoparticles takes place, the individual transpor

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Hsiao, Pei-I., and 蕭佩宜. "Preparation and Characterization of Cobalt, Chromium and Zinc Complexes Supported by Schiff Base-Type Ligands: Their Application in the Polymerization." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/fehc23.

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碩士<br>國立中興大學<br>化學系所<br>101<br>A series of cobalt, chromium and zinc complexes supported by Schiff base ligands (1-6) with sterically bulky cumyl groups have been synthesized and characterized. X-ray structure of complex 1‧MeOH and 5 shows distorted square pyramidal geometry around the cobalt center and distorted tetrahedral geometry around the zinc center, respectively. Cobalt complexes (1-2) and chromium complexes (3-4) have shown to be efficient initiators for the copolymerization of cyclohexene oxide and succinic anhydride in the presence of DMAP as a cocatalyst. Ring-opening polymerizatio

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kai, Chen chien, and 陳建凱. "The effects of Copper, Zinc, Chromium on the nitrogen removal of the activated sludge of the A2O and SBR systems." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/72007426994676596805.

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碩士<br>國立暨南國際大學<br>土木工程學系<br>94<br>In recent year, the rapid growth of economic activities, expanding the science park zone, developing technology and urbanization increase the waste water quantity. Taiwan is famous for his technical industry, but parts of untreated waste water which contains heavy metals is poured into and poisoned the water body of reservoirs, rivers and soil in different levels. The techniques which use microorganisms to treat heavy metals contained wastewater are developed continually, but heavy metals effect on the removal abilities of nutrition by microorganisms and its b

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Yan, Maio Jung, and 顏妙榕. "Regional Investigation and Health Risk Assessment of Lead、Cadmium、Copper、Chromium、Manganese、Zinc、Nickel、Arsenic、Mercury and Fluoride in The Groundwater." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/17723462184090842544.

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碩士<br>高雄醫學大學<br>公共衛生學研究所<br>92<br>Abstract Purpose: The aim of the study is to figure out the regional differences of heavy metal concentrations of the groundwater in Taiwan. Method: According to the report of “Surveys of the Drinking Water Facilities in schools” in 1988, 158 schools were selected by telephone interview. The water samples were collected and analyzed with standard by National Institute of Environmental Analysis. And 9 items of heavy metals had been analyzed, including lead, copper, cadmium, chromium, zinc, mercury, manganese, nickel, and arsenic.

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CHANG, SOU-CHAN. "THE ISOLATION AND CHARACTERIZATION OF METAL METHYLENE COMPOUNDS, (MCH(2), M = CHROMIUM, MANGANESE, IRON, COBALT, NICKEL, COPPER, ZINC), VIA FTIR MATRIX ISOLATION SPECTROSCOPY (INFRARED)." Thesis, 1987. http://hdl.handle.net/1911/16044.

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The reactions of atomic metal with diazomethane in cryogenic matrices have been studied using Fourier Transform infrared spectroscopy. Chromium, manganese, iron, cobalt, nickel, and copper atoms were found to react spontaneously with diazomethane in argon matrices to form the simple unligated metal methylene, MCH$\sb 2$, the dinitrogen coordinated metal methylene, N$\sb 2$MCH$\sb 2$, and metal-diazomethane complexes, M(CH$\sb 2$N$\sb 2$). Only the Zn(CH$\sb 2$N$\sb 2)$ complex was spontaneously formed in the zinc reaction. Metal methylene species, isolated as (N$\sb 2$)$\sb{\rm x}$MCH$\sb 2$ w

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Lu, Duan-Yen, and 呂端晏. "Synthesis, Reactivity, and Formation Mechanism of Low-Coordinate and Low-Valent Extended Metal Atom Chains and M-M Bonds (M = Niobium, Chromium, Manganese, Zinc and Cadmium)." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/03651665586930801679.

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博士<br>國立清華大學<br>化學系<br>100<br>The reaction between diamido ligand, Li4[Me2Si(NDipp)2]2 (Dipp = 2,6-iPrC6H3), and MCl2 (M = Mn and Cd) yields Mn2{??-Me2Si(NDipp)2}2 (3) and Cd2{????-Me2Si(NDipp)2}2 (4). After stepwise reduction of Complex 3, we could separate [(THF)2K⊂18-crown-6][Mn2{????-Me2Si(NDipp)2]2 (18-crwon-6 = 1,4,7,10,13,16-hexaoxacyclooctadecane; THF = tetrahydrofuran ([(THF)2K⊂18-crown-6][5]), [K⊂222-crptand]2[Mn2{??-Me2Si(NDipp)2]2 (222-cryptand = 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) ([K⊂222-cryptand]2[6]) and [K2⊂6]. Both Complex [K⊂222-cryptand]2[6] and [K2⊂

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VONDRUŠKA, Jan. "Kontaminace půd vybranými kovy v důsledku železniční dopravy." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-316585.

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This work deals with the determination of metals in soils taken close to the railway. Copper, zinc, nickel and chromium were selected as indicators of the environment contamination. Samples were taken from three localities in South Bohemia. These localities were chosen on the basis of different types of railway tracks (electrified and nonelectrified) and different frequency of train connection. Atomic absorption spectrometry was used for the determination of the metals. An AAS Thermo Scientific iCE 3500 spectrometer served to determine individual analytes. The highest level of copper pollution

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Barcyte, Dovile. "Zelené řasy dominující ve fytoplanktonu dvou kyselých jezer: taxonomické postavení, fylogenetické vztahy a odolnost vůči kovům." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-343827.

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The aim of this diploma thesis was to reveal the taxonomic position and phylogenetic relationships of the dominant planktonic algae in two acid metal-rich lakes (Hromnice Lake and Plešné Lake, Czech Republic) and to compare these isolates with other closely related strains with the focus on the tolerance to various toxic metals (Cr, Al, Cu, Mn, Zn, Hg). The phylogenetic analyses showed that both strains belong to species Coccomyxa simplex. It was the first evidence that specifically this species is capable to become the dominant phytoplankton alga in the extreme environment of acid lakes with

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Norwood, Warren Paul. "Metal Mixture Toxicity to Hyalella azteca: Relationships to Body Concentrations." Thesis, 2007. http://hdl.handle.net/10012/3559.

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A literature review of metal mixture interaction analyses identified that there was not a consistent method to determine the impact of metal mixtures on an aquatic organism. The review also revealed that a majority of the research on mixtures made use of water concentrations only. Therefore research was conducted to determine the relationship between exposure, bioaccumulation and chronic effects of the four elements As, Co, Cr and Mn individually. Mechanistically based saturation models of bioaccumulation and toxicity were determined for the benthic invertebrate Hyalella azteca, from which let

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Gruia, Letitia M. "Synthèse et caractérisation de complexes métalliques avec le ligand 2,2'-biimidazole et son dérivé 1,1'-diméthyl-2,2'-biimidazole." Thèse, 2008. http://hdl.handle.net/1866/6561.

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