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Dissertations / Theses on the topic 'Zinc content'

Author: Grafiati

Published: 4 June 2021

Last updated: 24 February 2023

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1

Evens, Nicholas Philip. "The regulatory mechanisms controlling zinc content in wheat." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/407446/.

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Cereals such as wheat serve as staples for a large proportion of the world’s population. However, they contain relatively low concentrations of essential micronutrients such as zinc (Zn) in their edible tissues. This is a major issue for human nutrition and food security. The process of Zn uptake and partitioning in plants is highly controlled, with systems present for sensing and responding to Zn status. In the model plant, Arabidopsis thaliana, two transcription factors, bZIP19 and bZIP23, are thought to act as Zn sensors mediating the increased expression of Zn membrane transporters, ZIPs (

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2

PULS, ROBERT WILLIAM. "ADSORPTION OF HEAVY METALS ON SOIL CLAYS (KAOLINITE, CADMIUM, MONTMORILLONITE, ZINC)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183889.

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Metal cation adsorption is the predominant chemical mechanism governing the attenuation of toxic metal movement in soils. Clay minerals are the primary adsorbent surfaces in soils due to their ubiquitous nature and large reactive surface area. This study examined the relative affinity of the metals cadmium, nickel and zinc for the clay minerals kaolinite and montmorillonite. The influence which different mineral adsorbents and different complexing ligands in solution have on the adsorption of metal ions was assessed using the Hard-Soft Acid-Base Principle as a theoretical framework for predict

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3

Neilsen, Denise. "Characterization and plant availability of zinc in British Columbia orchard soils." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72835.

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4

Marsh, Sally. "Impact of traffic pollution on the nitrogen metabolism and zinc content of roadside vegetation." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1445685/.

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The impact of traffic pollution on the nitrogen metabolism and zinc content of roadside vegetation was investigated by measuring a range of physiological responses and surface Zn in trees. Dry deposition in the form of NOx ranged from 14.8 to 40.7 Kg N ha yr"1 within the woodland. The amount of deposition was spatially related to the distance from the motorway that runs adjacent to the woodland. Maximum NOx deposition was found next to the motorway in the rural downwind environment At mis site trees exhibited significantly higher growth rates as assessed by yearly shoot extension as well as ex

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5

Henshel, Judy 1958. "Copper, manganese, and zinc in Puerco River sediments." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276725.

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A study was conducted to test for the presence of heavy metals (Cu, Mn, and Zn) in surface sediments of the Puerco River channel in the aftermath of a toxic spill in 1979 near Church Rock, New Mexico. Analysis of samples from five sites downstream from the spill showed that these substances were not present in unusually large amounts, though an increasing gradient of metal concentration with distance downstream was revealed. Statistical analysis revealed the Cu, Mn, and Zn were associated with clay and silt, soil organic matter, organic carbon, and carbonates, all of which existed as extraneou

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6

Wijesundara, Chandra. "Response of corn to high levels of CuSO₄ and ZnSO₄ applications." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45959.

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High levels of Cu and Zn application to agricultural soils are considered to pose a potential hazard to plants and animals. The levels of Cu and Zn which can be safely added to cropland have yet to be established. This study was conducted on a Davidson silty clay (Rhodic Paleudult) to determine the response of corn (<u>Zea mays</u> L.) to cumulative application of up to 469 kg Cu and 1032 kg Zn ha⁻¹ as sulfates over the 22-year period from 1967 through 1988. Neither corn grain nor silage yield was affected by the metal additions even though the cumulative amount of Cu and Zn added exceeded the

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7

Pietrzak, Kornel. "Fabrication and studies of porous coatings containing calcium, magnesium and zinc on a titanium substrate for mechanical engineering applications : PhD thesis summary : [synopsis]." Rozprawa doktorska, [s.n.], 2021. http://dlibra.tu.koszalin.pl/Content/1316.

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8

Ramesh, Sunita. "Molecular mechanism of zinc uptake and regulation in cereals." Title page, table of contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phr1724.pdf.

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Bibliography: leaves 174-204. "This work provides a starting point for understanding the molecular mechanisms of zinc uptake and the regulation of zinc transport in cereals. Zinc efficient cereals would yield more on soild with low zinc and could potentially result in increased zinc content grain."

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9

Mfeka, Nonkululeko. "Morphology and mineral content of cowpea lines in response to planting date and zinc application rate." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2672.

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Thesis (MTech (Agriculture))--Cape Peninsula University of Technology, 2017.<br>Cowpea (Vigna unguiculata (L.) Walp) is an important grain and fodder legume grown around the world. It is a dual purpose grain legume crop, providing food for man and livestock. Cowpea is identified as a potential crop to diversify food production, minimize production input by improving soil fertility and improve micronutrients of seed, therefore, improving human nutrition. There is limited information available on cowpea production and suitable agronomic practices including planting date to best suit different en

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10

Tadayyon, Ali, Sedigheh Beheshti, and Mohammad Pessarakli. "Effects of sprayed humic acid, iron, and zinc on quantitative and qualitative characteristics of niger plant ( Guizotia abyssinica L.)." Taylor & Francis, 2017. http://hdl.handle.net/10150/626135.

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In order to investigate the effect of foliar application of organic fertilizer and micronutrients on quantitative and qualitative characteristics of Niger plant, a field experiment was conducted in a complete randomized block design with three replications at Shahrekord University Research Farm during the years 2013-2014. Treatments included three levels of humic acid (1, 3, and 6 liters of humic acid per hectare), iron (4 parts per million, ppm), zinc (4 parts per million, ppm) and control (without humic acid iron, and zinc). In this experiment, traits of the number of heads per plant, se

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11

Gettier, Stacy W. "Corn response to long-term application of CuSO₄, ZnSO₄ and Cu-enriched pig manure." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49779.

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12

Thyrén, Linnea. "Plant-based meat substitutes and their nutritional composition : A study on iron content, zinc content, calcium content and protein quality in meatballs and plant-based substitutes and how they contribute to the goal of reaching recommended daily intakes." Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96761.

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The purpose of this thesis was to study similarities and differences between a meat product and its plant-based substitutes in terms of how they enable people to reach the recommended daily intakes (RDI). The meat product included in the study were meatballs and its substitutes were three different plant-based alternatives. One was mainly based on soy, one on pea protein and one consisted of several different vegetables. The parameters studied were iron, zinc and calcium content as well as protein quality. By analyzing the four different products with flame atomic absorption spectroscopy (FAAS

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13

Singbo, Arnaud. "The effect of zinc and soil ph on grain yield and nutrient concentrations in spring wheat cultivated on potted soil." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2845.

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Thesis (MTech (Agriculture))--Cape Peninsula University of Technology, 2018.<br>Zinc deficiency on various soil types have been reported in arable soils of sub Saharan Africa (SSA) including South Africa. A pot trial was conducted at the Cape Peninsula University of Technology, Wellington campus to investigate the interaction of different application rates of Zn at various soil pH on the grain yield and quality of spring wheat in a completely randomized factorial design replicated three times. The four soil pH tested were: pHA: 5.1, pHB: 5.6, pHC: 6.1, pHD: 6.6 which correspond to lime applica

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14

Owojori, Olugbenga J. (Olugbenga John). "Influence of clay content and salinity on the bioavailability and toxicity of metals (copper and zinc) to soil organisms." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1484.

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Thesis (PhD (Botany and Zoology))—University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: Metal pollution is a problem of increasing global concern. It could arise from industrial activities, as well as pesticide use in agriculture, among other sources. For adequate protection of the soil ecosystem from metal toxicity, the bioavailability of metals must be properly evaluated. A plethora of soil factors affect the bioavailability of metals to soil organisms. These include pH, clay and organic matter contents, salinity among others. While much is known about the influence of some of these p

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15

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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16

Wheal, Matthew Simon. "The influence of chlorsulfuron on the uptake and utilization of zinc by wheat /." Title page, table of contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phw556.pdf.

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17

Sadeghzadeh, Behzad. "Mapping of chromosome regions associated with seed zinc accumulation in barley." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0204.

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[Truncated abstract] Zinc deficiency in crops is the most widespread micronutrient deficiency, with about 50% of the cereal-growing areas worldwide containing low levels of plant-available Zn. Zinc plays multiple key roles in different metabolic and physiological processes; its deficiency in crops reduces not only grain yield, but also the nutritional quality of grains. Insufficient micronutrient intake, particularly Zn and Fe, afflicts over 3 billion people in the world, mainly in developing countries. Increasing the amount of Zn in food crops can contribute to improving the Zn status of peop

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18

Asente, Rebecca Ann. "The effect of non-weight-bearing exercise and protein intake during pregnancy on maternal and fetal zinc content in the Sprague-Dawley rat." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90906.

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To study the effect of exercise and protein intake during pregnancy on maternal and fetal zinc status in the rat, one hundred and seventy-nine pregnant Sprague-Dawley rats were divided into four groups; sedentary-standard protein diet, sedentary-high protein diet, exercising-standard protein diet and exercising-high protein diet. The standard protein diet contained 7.22% protein, while the high protein diet contained 24.77% protein; all other nutrients were supplied in amounts required for normal parturition of the laboratory rat. After acclimatization, the exercising dams, regardless of diet,

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19

Achen, Jasinta H. "Evaluation of the nutritional correlates of growth of early and middle stage HIV-infected children in Uganda and zinc content of Ugandan food plants." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83957.

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A cross-sectional survey was carried out to evaluate the nutritional correlates of growth in 93 HIV-infected children in the early and middle stages of infection. Also, as zinc is important for growth and immune function, foods commonly eaten by these children were evaluated for zinc content. Foods with relatively high zinc were identified in Uganda, and these food items were legumes and cereals. A high prevalence of stunting and wasting was found in HIV-infected children. The study also found that the frequency of past week oil/fat and staples consumption was non-significantly correlat

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20

Bosshard, Gabriela Zanotto 1986. "Propriedades ópticas e estruturais de óxido de zinco contendo enxofre." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250265.

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Orientador: Fernando Aparecido Sigoli<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Química<br>Made available in DSpace on 2018-08-22T05:08:39Z (GMT). No. of bitstreams: 1 Bosshard_GabrielaZanotto_M.pdf: 4132378 bytes, checksum: abfa0f7115fb10b1aa31e7b1e9367ef8 (MD5) Previous issue date: 2012<br>Resumo: O objetivo deste projeto foi investigar a síntese de óxido de zinco contendo enxofre obtido a partir de sulfeto de zinco nas fases wurtzita (hexagonal) e blenda de zinco (cúbica), assim como fazer a caracterização e estudar as alterações estruturais e ópticas dos

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21

Bueche, Blaine. "The Effect of PEG-Insulin and Insulin Hexamer Assembly on Stability in Solution and Dry Powders. Hexamer Assembly of PEGylated-Insulin and Insulin Studied by Multi-Angle Light Scattering to Rationally Choose the pH and Zinc Content for Analytical Methods and Formulations of Dry Powders." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5688.

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The objective of this research is to further define the relationship between the charge state of insulin, and the self assembly properties of insulin and PEGylated insulin in solution. Polyethylene glycol (PEG) chains were covalently attached to insulin in order to evaluate their impact on insulin's systemic duration of action after pulmonary dosing. This thesis will focus on the assembly properties of the PEG-insulin and insulin, and also demonstrate how the charge state, which was modified by the covalent attachment of PEG, relates to different modes of behavior by anion and cation exchange

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22

Fotovat, Amir. "Chemistry of indigenous Zn and Cu in the soil-water system : alkaline sodic and acidic soils." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phf761.pdf.

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Copies of author's previously published articles inserted. Bibliography: leaves 195-230. In this study the soil aqueous phase chemistry of Zn and Cu in alkaline sodic soils are investigated. The chemistry of trace metal ions at indigenous concentrations in alkaline sodic soils are reported. Metal ions at low concentrations are measured by the graphite furnace atomic absorption spectrometry (GFAAS) technique.

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Colán, Victoria Amelia Lázaro. "Perdas em ferritas de manganês zinco: o papel da sinterização e de parâmetros microestruturais." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-30112010-144937/.

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O uso das ferritas de manganês zinco em fontes de potência de carregadores de bateria vem crescendo nos últimos anos, devido a suas baixas perdas magnéticas em induções da ordem de 0,2 T. Estas ferritas pertencem à categoria de ferritas moles, são óxidos ferrimagnéticos, policristalinos com estrutura cúbica tipo espinélio. Pós desse material foram compactados em prensa uniaxial e em prensa automática de produção para anel e toróide, respectivamente. Foram realizados dois ciclos de queima variando o teor de oxigênio entre 5 e 15%, no patamar de sinterização, com o propósito de avaliar seu efeit

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24

Fathi, Shida. "Kontroll av zinkskikt på monterat räckesmaterial." Thesis, KTH, Byggteknik och design, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147182.

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Kontroll av zinkskikt på monterat räckesmaterial som görs ute i fält saknar en fastställd metod. Zinktjockleken har ett minimum tjocklekskrav enligt den svenska standarden ISO 1461:2009, som bestäms av dimensionen på ståldetaljens tjocklek. Trafikverket begär att med hjälp av detta examensarbete kunna begränsa antal mätningar på plats, då kan det ta allt för mycket tid och arbetsresurser i fall det skulle behövas kontroll av väg-och bro räckesanläggningar från beställaren. Sannolikhetsläran och stickprov i statistik hjälper oss att begränsa antalet mätningarna på skyddsanordningarna som görs u

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Allen, Martin Ward. "Schottky Contact Formation to Bulk Zinc Oxide." Thesis, University of Canterbury. Electrical and Computer Engineering, 2008. http://hdl.handle.net/10092/4385.

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Zinc oxide is a II-VI semiconductor with considerable potential for optoelectronic and power-electronic applications in the UV spectrum, due to its wide direct band gap (3.35 eV at 300 K), high exciton binding energy (60 meV), high melting point, and excellent radiation hardness. A key requirement for many device applications is the consistent production of high performance Schottky contacts. Schottky contact formation to n-type ZnO was investigated via systematic studies into the relative performance of different metal and metal oxide Schottky contacts to hydrothermal and melt grown, bulk ZnO

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Oliveira, Cristine Santos de 1990. "Sistemas nanoestruturados de ZnO contendo Eu3+ em sílica mesoporosa." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250543.

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Orientador: Ítalo Odone Mazali<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Química<br>Made available in DSpace on 2018-08-22T20:07:38Z (GMT). No. of bitstreams: 1 Oliveira_CristineSantosde_M.pdf: 3527061 bytes, checksum: 7dfe90cc79337811bc7955e8a1531586 (MD5) Previous issue date: 2013<br>Resumo: O trabalho consistiu na síntese de sistemas nanoestruturados de ZnO contendo Eu em sílica mesoporosa, o vidro poroso Vycor (PVG), utilizando o método de ciclos de impregnação-decomposição (CIDs). Sistemas de nanopartículas puras de ZnO, na forma PVG/10ZnO mostraram que

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Sellaf, Zenagui. "Élimination par voie électrochimique du zinc contenu dans les effluents industriels." Toulouse, INPT, 1999. http://www.theses.fr/1999INPT028G.

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L'objectif de ce memoire est d'apporter une contribution a l'etude de l'elimination du zinc present dans les effluents industriels. L'analyse critique des differents procedes envisageables de traitement des solutions de zinc en milieu acide a conduit a l'adoption de la technique electrochimique. Une etude preliminaire a ete effectuee pour differentes solutions de zinc (en milieux chlorhydrique et sulfurique) en vue de determiner les conditions voltamperometriques de l'electrolyse de zinc. L'electrolyse a ete conduite pour deux modes de controle : potentiostatique et galvanostatique. Ce travail

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Santos, Marcia Cristina Gonçalves dos. "Avaliação do desempenho de filmes contendo silanos e sais de terras raras para proteção contra corrosão de camadas de ZnFe eletrodepositadas." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263579.

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Orientador: Celia Marina de Alvarenga Freire<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-13T07:27:48Z (GMT). No. of bitstreams: 1 Santos_MarciaCristinaGoncalvesdos_D.pdf: 5280662 bytes, checksum: 763649a5f0d49aa48853a896ab0335c2 (MD5) Previous issue date: 2009<br>Resumo: Aço galvanizado e aço eletrodepositado com liga ZnFe são materiais comuns na indústria de construção civil e automotiva. Esses materiais à base de zinco necessitam, entretanto, serem protegidos de ambientes corrosivos através de um tratament

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Diawara, Jules. "Mouillabilité de surfaces hétérogènes (fer/oxyde) par un alliage de zinc liquide." Phd thesis, Ecole Centrale Paris, 2011. http://tel.archives-ouvertes.fr/tel-00658768.

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Le phénomène de mouillage intervient dans de nombreux procédés, parmi lesquels la galvanisation en continu de tôles d'acier pour carrosserie automobile. Dans ce procédé, la tôle est immergée dans un bain de zinc liquide afin de la recouvrir d'une couche protectrice de zinc. Mais avant cela, cette tôle, laminée à froid, est soumise à un recuit sous atmosphère réductrice dans le but d'éliminer l'écrouissage et les oxydes de fer superficiels et favoriser ainsi les réactions de galvanisation. Des nouveaux aciers, dits à haute limite d'élasticité, ont été élaborés afin d'améliorer la sécurité passi

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Gu, Qilin. "Hydrogen peroxide treatment induced rectifying behavior of Au/n-ZnO contact." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/HKUTO/record/B39558344.

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Surmann, Luciana Loffredo. "Desenvolvimento de microemuls?es contendo fotoprotetores inorg?nicos nanoparticulador." Universidade Federal do Rio Grande do Norte, 2008. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13437.

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Made available in DSpace on 2014-12-17T14:16:22Z (GMT). No. of bitstreams: 1 LucianaRS_Pre_textuais.pdf: 37160 bytes, checksum: 5c10ca3517f836e974edc672ecd286cb (MD5) Previous issue date: 2008-02-12<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The inorganic actives, represented mainly by microfine zinc oxide and titanium dioxide, have shown great potential to protect against large UV spectrum. The aim of this study is the development, characterization and analysis of stability in the short term of microemulsions containing inorganic fotoprotection agents. The microem

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Warner, Ronald Douglass. "Zinc and calcium effects on nickel dermatitis in the guinea pig /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487330761217158.

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Santos, Marcia Cristina Gonçalves dos. "Estudo de filmes polimericos contendo silanos y-UPS e VS como revestimentos promotores de adesão em superficies galvanizadas e eletrodepositos de ligas ZN/FE e ZN/Co." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263596.

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Orientador: Celia Marina de Alvarenga Freire<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia mecanica<br>Made available in DSpace on 2018-08-04T09:48:54Z (GMT). No. of bitstreams: 1 Santos_MarciaCristinaGoncalvesdos_M.pdf: 7174846 bytes, checksum: 71b57284d8926f02702b824e265c956a (MD5) Previous issue date: 2005<br>Resumo: A excelente resistência do Zinco em diferentes ambientes corrosivos e sua habilidade em proteger o aço, fazem do aço galvanizado e eletrodepósitos, materiais comuns na indústria automotiva e de construção civil. Os substratos de aço ga

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顧啟琳 and Qilin Gu. "Hydrogen peroxide treatment induced rectifying behavior of Au/n-ZnO contact." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39558344.

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Andrade, Jirrah Pedro de. "Desenvolvimento e eficácia clínica de dermocosméticos para a pele acneica contendo vitamina B3 e derivados de vitamina B6 e zinco." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/60/60137/tde-30012014-081127/.

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A acne é uma doença de pele com alta prevalência e seu tratamento é importante para evitar lesões cutâneas permanentes ou o agravamento de transtornos psicológicos provenientes do abalo à autoestima. Dessa forma, o desenvolvimento de formulações dermocosméticas eficazes que possam melhorar as condições desse tipo de pele é de grande valia. Dentre os ativos com potenciais benefícios para o controle de alguns dos principais fatores causadores da acne, estão a vitamina B3, um derivado de vitamina B6 e o PCA zinco. Assim o objetivo deste estudo foi o desenvolvimento de formulações dermocosméticas

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Meroufel, Abdelkader. "Étude de nouvelles formulations de peintures en poudre riches en zinc et contenant PANI." La Rochelle, 2006. http://www.theses.fr/2006LAROS180.

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Les peintures riches en zinc sont aujourd’hui largement utilisées dans l’industrie pour protéger les structures métalliques des environnements agressifs. Le zinc métallique est dispersé dans une matrice polymère sous forme de fine poussière. Ces particules doivent être en contact électrique entre elles et avec le substrat métallique (percolation), pour jouer le rôle de pigment sacrificiel et permettre de placer le substrat sous protection cathodique. Dans de nombreuses formulations de peinture poudre riches en zinc, la teneur en zinc ne dépasse pas 50 % en masse, induisant un faible nombre de

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Snider, James M. "Zinc pot bearing material wear rate as a function of contact pressure and velocity." Morgantown, W. Va. : [West Virginia University Libraries], 2002. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=2721.

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Thesis (M.S.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains x, 80 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 69-70).

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Tsin, Fabien. "Développement d'un procédé sur grande surface d'électrodépôt d'oxyde de zinc comme contact avant transparent et conducteur de cellules solaires à base de Cu(In,Ga)Se2." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066311/document.

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Les cellules solaires en couches minces à base de Cu(In,Ga)(S,Se)2 (CIGS) représentent une technologie à fort potentiel et aux performances photovoltaïques élevées. La couche finale de l'empilement, appelée couche fenêtre, est principalement composée d'une bi-couche d'oxyde de zinc (ZnO) non dopé et dopé de type n - généralement à l'aluminium - et déposée par un procédé sous vide : la pulvérisation cathodique. Cependant, cette technique demande des investissements importants et un intérêt croissant s'est porté sur le développement de techniques alternatives atmosphériques en vue d'une réductio

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Buitrago, Leidy Julieth Hernández. "Avaliação microestrutural, cinética e mecânica do comportamento de pelotas auto-redutoras a base de resíduos de aciaria elétrica contendo zinco do processo Waelz." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-17072018-152706/.

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Durante a produção do aço a partir da fusão de sucatas em fornos elétricos a arco é gerado entre 10 e 20 kg de resíduos por cada tonelada de aço fundido constituídos por fumos e poeiras contendo óxidos principalmente de ferro, zinco, cálcio e chumbo, tornando-os altamente perigosos e tóxicos. Na procura de uma solução para mitigar problemas de descarte desses resíduos, propõe-se a aglomeração da poeira de aciaria elétrica (PAE) na forma de pelotas auto-redutoras. Essas últimas, são tratadas termicamente pelo processo Waelz o qual consiste em um forno rotativo, alimentado pelas pelotas, e que r

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Santos, Claudia Joanita. "Aplicação da polianilina contendo nanopartículas de zinco em revestimentos de carrocerias automotivas." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2957.

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A proteção contra corrosão na indústria automotiva é um problema de alto impacto econômico. Além de características anticorrosivas, os revestimentos utilizados nas indústrias automotivas precisam apresentar boa aparência e resistência física. Os revestimentos multicamadas normalmente utilizados em indústrias automotivas são compostos por e-coat, primer, base e verniz, sendo que o primer pode ser utilizado como um substituto do e-coat em processos de retoque ou retrabalho. Sob outra perspectiva, os polímeros condutores têm sido amplamente estudados como um revestimento anticorrosivo e o compósi

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Petit, Fabien. "Contribution à l'étude de la réduction par plasma d'arc de fines oxydées contenant du plomb et du zinc." Limoges, 1997. http://www.theses.fr/1997LIMO0054.

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Les fours chauffes par l'intermediaire de bruleurs, pour le traitement des dechets, presentant de nombreux inconvenients, les plasma thermiques voient leur interet grandir. Dans le cadre d'une collaboration scientifique developpee par le cnrs, edf et l'ademe, notre travail s'interesse au traitement par plasma thermique de poussieres de ferrosilicium oxydees contenant du plomb et du zinc. Ces produits ont ete choisis pour leur composition proche de celle des refiom (residus d'epuration des fumees d'ordures menageres). Un reacteur plasma a arc transfere en atmosphere controlee (10#5 pa) de taill

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Merlin, Cécile. "Approches analytique et électrochimique de la dégradation des tôles d'acier revêtues cataphorésées en atmosphères corrosives contenant des ions sulfates." Nancy 1, 1999. http://www.theses.fr/1999NAN10286.

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Les mécanismes de dégradation des systèmes multicouches de type automobile en atmosphères contenant des sulfates ont été étudiés sous deux approches : l'étude des produits de corrosion et l'évolution du comportement électrochimique en immersion. Dans une première étape, une étude détaillée des produits de corrosion du zinc à base d'ions sulfates, particulièrement complexes du fait de leur variété, a été réalisée. En particulier, la famille ZnSO4, 3ZN(OH)2, nH2O avec 0 ≤ n ≤ 5 a fait l'objet d'études approfondies. L’obtention des hydrates les plus stables sous forme pure a permis de préciser la

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Jahed, Mohammed Nazeem. "The application of differential pulse anodic stripping voltammetry for the determination of copper, lead, zinc and cadmium in airborne particulate matter." Thesis, [S.l. : s.n.], 1995. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1007&context=td_ptech.

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Hedroug, Karima. "Influence des chromates sur l'hydratation de la pate de ciment portland, durcissant au contact d'armatures galvanisees." Toulouse 3, 1987. http://www.theses.fr/1987TOU30192.

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Les ions chromates jouent le role d'inhibiteur dans la prise des pates de ciment portland car le zinc, constituant de la derniere couche de galvanisation est dans son domaine de passivation car le ph de la solution est tres faible

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Caovilla, Alessandra. "Catalisadores de zinco(II) e alumínio(III) contendo ligantes imina-pirrol e imina-fenolato aplicados na polimerização de lactídeos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/181332.

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Novos catalisadores de ZnII e AlIII contendo ligantes imina-pirrol e imina-fenolato foram preparados, estruturalmente caracterizados em solução e no estado sólido e usados na polimerização por abertura de anel do rac- e L-lactídeo em solução ou condições industrialmente preferidas (livre de solvente a 130 °C), na presença de um álcool como coiniciador/agente de transferência de cadeia (BnOH e iPrOH). Os catalisadores de ZnII bis-imina-pirrol Zn1-Zn4 demonstraram que a flexibilidade da estrutura do ligante, bem como o átomo doador (oxigênio versus enxofre), exercem influência na atividade da po

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Badre, Chantal. "Etude de la réactivité de surface par mesure d'angle de contact : influence de la fonctionnalisation et de la structure : applications aux films d'oxyde de zinc électrodéposés." Paris 6, 2007. https://pastel.archives-ouvertes.fr/pastel-00004902.

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Le travail présenté dans ce manuscrit concerne l’étude de la réactivité de surface par mesures d’angles de contact. Nous nous sommes plus particulièrement intéressés à l’élaboration de surfaces texturées rugueuses. Dans la première partie, nous avons préparé des polymères formés d’un mélange de PVC et d’acide laurique. Puis, ces films sont rendus rugueux en y incorporant des billes d’aérosil. Mais, l’inconvénient de ce type de surface réside dans le fait qu’il n’est pas aisé d’en modifier la morphologie ni de la contrôler. Dans la deuxième partie, nous nous sommes intéressés à des matériaux do

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Cohen, Serge. "Détermination et étude de la structure d'un nouveau module se fixant à l'ADN et contenant du zinc : le domaine GCM." Université Joseph Fourier (Grenoble), 2002. http://www.theses.fr/2002GRE10173.

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Faÿ, Sylvie Shah Arvind V. Shah Arvind V. Shah Arvind V. "L'oxyde de zinc par dépôt chimique en phase vapeur comme contact électrique transparent et diffuseur de lumière pour les cellules solaires /." [S.l.] : [s.n.], 2003. http://library.epfl.ch/theses/?display=detail&nr=2899.

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Romero, João Henrique Saska. "Propriedades ópticas e estruturais de hidróxidos duplos lamelares luminescentes contendo zinco, alumínio, európio e ligantes orgânicos /." Araraquara, 2017. http://hdl.handle.net/11449/150013.

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Orientadora: Marian Rosaly Davolos<br>Banca: Édson Pecoraro<br>Banca: Fernando Aparecido Sigoli<br>Banca: Vera Regina Leopoldo Constantino<br>Banca: Sérgio Antonio Marques de Lima<br>Resumo: O desafio da Química no século XXI é a obtenção de materiais promissores em aplicações e perspectivas inovadoras. Um ótimo candidato para estudos específicos é a síntese de materiais luminescentes bidimensionais. Entre as matrizes bidimensionais disponíveis, pode-se destacar os Hidróxidos Duplos Lamelares (HDLs) sintetizados no laboratório por rotas simples e de baixo custo, que têm como fórmula geral [M2+

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Kenmoe, Stephane [Verfasser], Jörg [Gutachter] Neugebauer, and Ralf [Gutachter] Drautz. "Ab initio study of the low-index non-polar Zinc oxide surfaces in contact with water / Stephane Kenmoe ; Gutachter: Jörg Neugebauer, Ralf Drautz." Bochum : Ruhr-Universität Bochum, 2016. http://d-nb.info/1121909388/34.

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