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Dissertations / Theses on the topic 'Cadmium phosphide'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Rybicki, George Charles. "Proton irradiation damage in zinc and cadmium doped indium phosphide." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057001628.

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2

Sloanes, Trefor James. "Measurement and application of optical nonlinearities in indium phosphide, cadmium mercury telluride and photonic crystal fibres /." St Andrews, 2009. http://hdl.handle.net/10023/723.

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3

Sloanes, Trefor J. "Measurement and application of optical nonlinearities in indium phosphide, cadmium mercury telluride and photonic crystal fibres." Thesis, University of St Andrews, 2009. http://hdl.handle.net/10023/723.

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The two-photon absorption (TPA) coefficient is measured in indium phosphide (InP) using femtosecond pulses to be 45cm/GW at 1.32μm. Nanosecond pulses are subsequently used to find the free-carrier refractive index cross-section, σ_r, and the free-carrier absorption coefficient, σ_fca. The quantity βσ_r is measured to be -113x10⁻²ºcm⁴/GW at 1.064μm and -84x10⁻²ºcm⁴/GW at 1.534μm. At 1.064μm, with β assumed to be 22cm/GW, the value suggested by theory, σ_r is -5.1x10⁻²ºcm³. Similarly, at 1.534μm, assuming β to be 20cm/GW gives a σ_r value of -4.1x10⁻²ºcm³. Due to refraction affecting the measure

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4

Cimaroli, Alexander J. "Development of Deposition and Characterization Systems for Thin Film Solar Cells." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481295690696407.

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5

Green, Mark A. "Novel routes to nanodispersed semiconductors." Thesis, Imperial College London, 1999. http://hdl.handle.net/10044/1/12035.

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6

Brandt, Clarissa. "The Effects of Cadmium and Lead on Phaseolus vulgaris." University of the Western Cape, 2012. http://hdl.handle.net/11394/5096.

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Magister Scientiae (Biodiversity and Conservation Biology) - MSc (Biodiv and Cons Biol)<br>The demand for better quality produce by consumers is on the increase, as higher heavy metal concentrations pose a problem in agriculture. They result in decreased yield and unsuitable food for human consumption. This brings about a negative economic effect as such products become unprofitable on the domestic or export markets thus affecting productivity of farms.Four heavy metals (Cd, Cu, Pb and Zn) have been shown to be a problem in the farming areas in Cape Town. Pot and field studies were carried out

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7

Donze, Sébastien. "Conversion des chlorures de métaux lourds en verres de phosphate." Compiègne, 1999. http://www.theses.fr/1999COMP1222.

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Le traitement des REFIOM par vitrification conduit à l'obtention d'un vitrifiat et d'une petite fraction résiduelle issue du traitement des fumées où se trouvent concentrés les composés toxiques : les cendres secondaires. Celles-ci sont riches en métaux lourds sous forme de chlorures et en chlorures d'alcalins, NaCl et KC1. La forte solubilité et la très grande volatilité des chlorures s'avèrent particulièrement contraignantes pour les opérations d'inertage des métaux lourds. Il apparaît donc nécessaire de procéder à une étape de conversion de ces chlorures de métaux lourds afin de les récupér

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8

Azzi, Valérie. "Les apports des métaux traces par les fertilisants chimiques phosphatés dans les sols libanais : investigation sur leur devenir et leur transfert." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30093/document.

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L'utilisation de machines lourdes et la fertilisation des sols ont été la solution pour améliorer le rendement agricole et augmenter les aires des sols cultivés. Les pays émergeants Est-Méditerranéens souffrent d'un manque crucial des législations et des règlementations qui organisent l'usage des fertilisants chimiques. Cela est principalement dû à l'insuffisance des données sur les caractéristiques des sols et les pratiques agricoles. La fertilisation excessive est devenue une source potentielle de contamination des sols par les éléments traces métalliques (ETM) susceptible de migrer vers les

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9

Ha-Thi, Minh-Huong. "Nouvelles architectures supramoléculaires à base de ligands phosphorés fluorescents : synthèse, études photophysiques et applications." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2007. http://tel.archives-ouvertes.fr/tel-00254039.

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Ce travail concerne l'ingénierie de nouveaux systèmes supramoléculaires à base de ligands phosphorés fluorescents en vue de la réalisation des nouveaux matériaux optiques et de la détection de métaux lourds. Deux nouvelles séries de chromophores de type donneur-accepteur contenant des motifs phénylacétylène et une fonction oxyde ou sulfure de phosphine ont été synthétisées en utilisant le couplage de Sonogashira comme étape clé. Elles possèdent des rendements quantiques de fluorescence élevés ainsi qu'un transfert de charge efficace à l'état excité. Les oxydes de phosphine fluorescents présent

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10

Ciliberti, Alexandre. "Le Varan du Nil (Varanus niloticus), indicateur de la pollution des zones humides d’Afrique Sub-Saharienne." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10241/document.

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En Afrique, la contamination des zones humides par les métaux et les pesticides va se poursuivre durablement. Pour autant, le statut toxicologique de ces milieux reste trop peu documente. Le but du présent travail est d’estimer la valeur du varan du Nil (Varanus niloticus) en tant qu’espèce sentinelle pour la contamination des zones humides continentales d’Afrique sub-Saharienne. Plomb, cadmium, et pesticides organochlorés et organophosphorés ont été quantifies, par spectrométrie d’absorption atomique et chromatographie gazeuse (respectivement), dans plusieurs tissus provenant de 71 spécimens

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11

Chalivendra, Saikumar. "Bioremediation of Wastewater Using Microalgae." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1418994496.

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12

Meerkotter, Marÿke. "Sources of heavy metals in vegetables in Cape Town and possible methods of remediation." Thesis, University of the Western Cape, 2012. http://hdl.handle.net/11394/1721.

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Philosophiae Doctor - PhD<br>Cape Town includes two vegetable farming areas within the city limits, the Joostenbergvlakte/Kraaifontein area and the Philippi area. Both areas supply produce to local markets and further afield. Sporadically, high levels of cadmium, copper, lead and zinc have been found to occur in some of the soils, irrigation water resources and crops. To find the sources of specifically Cd, Pb and Zn to these agricultural systems, extensive analysis of several heavy metals in inputs such as fertilizers, agrochemicals and supplementary water resources to these farming areas was

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13

Neuschütz, Clara. "Phytostabilization of mine tailings covered with fly ash and sewage sludge." Doctoral thesis, Stockholms universitet, Botaniska institutionen, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8452.

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Establishing plant communities is essential for the restoration of contaminated land. As potential cover materials, fly ash and sewage sludge can prevent formation of acid mine drainage from sulfidic mine waste. The aim of the thesis was to i) screen for plants that can be established in, and prevent leakage of metals and nutrients from sludge on top of ash and tailings, and ii) investigate root growth into sealing layers of ash and sludge. Analyses were performed under laboratory, greenhouse and field conditions using selected plant species to examine the release of Cd, Cu, Zn, N, and P from

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14

Surtiningsih, Suprapto Tini. "Mobilisation de P et CD de phosphates naturels par des bactéries et des champignons ectomycorhiziens en culture pure et dans la rhizosphère du pin sylvestre." Nancy 1, 1994. http://www.theses.fr/1994NAN10271.

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L'influence d'une rhizobactérie solubilisant les phosphates (agrobacterium sp. ) et de champignons ectomycorhizogénes (pisolithus tinctorius, suillus granulatus, et hebeloma cylyndrosporum) sur la biodisponibilité du phosphore et du cadmium de trois phosphates naturels (Caroline du nord, Sénégal et Togo), a été étudiée: en cultures pures en l'absence de racines et dans la rhizosphère du pin sylvestre. En culture pure, agrobacterium sp. Mobilise plus de P. Et CD des phosphates naturels que les champignons ectomycorhizogénes étudiés. Cette mobilisation est surtout une solubilisation pour la bact

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15

Delaye, Philippe. "Etude des non-linéarité photoréfractives dans les composés semi-isolants III-V et II-VI : influence d'une irradiation électronique." Phd thesis, Université Paris Sud - Paris XI, 1993. http://pastel.archives-ouvertes.fr/pastel-00608575.

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Ce manuscrit présente l'étude de l'effet photorefractif dans le proche infrarouge et, plus particulièrement, l'étude des matériaux sensibles dans cette gamme de longueurs d'onde. la première partie du travail a consiste a étudier les matériaux existants, provenant de la microélectronique, le GaAs et l'InP. Les études réalisées, tant expérimentales que théoriques, ont permis de comprendre leurs propriétés et de mettre en évidence leurs limitations, notamment pour les applications dans la gamme de longueurs d'onde autour de 1,3 m. au vu de ces résultats, nous avons propose une technique d'optimi

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16

"Metalorganic chemical vapor phase deposition and luminescent studies of zinc cadmium selenide epilayers and low dimensional structures." 1999. http://library.cuhk.edu.hk/record=b6073152.

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"August 1999."<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 1999.<br>Includes bibliographical references.<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Mode of access: World Wide Web.<br>Abstracts in English and Chinese.

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17

"Photoluminescent properties of annealed ZnCdSe epitaxial layers on InP substrates =: 磷化銦上鋅鎘硒外延層退火處理後的光致發光性質". 1998. http://library.cuhk.edu.hk/record=b5889688.

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by Wong Kin Sang.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1998.<br>Includes bibliographical references (leaves 61-62).<br>Text in English; abstract also in Chinese.<br>by Wong Kin Sang.<br>Table of contents --- p.I<br>Chapter Chapter 1 --- Introduction<br>Chapter 1.1 --- Interest in ZnxCd1-x Se/InP --- p.1<br>Chapter 1.2 --- Conditions of thermal annealing --- p.2<br>Chapter 1.3 --- Advantages of using photoluminescence (PL) --- p.3<br>Chapter 1.4 --- Our work --- p.4<br>Chapter Chapter 2 --- Experimental setup and procedures<br>Chapter 2.1 --- PL measurements --- p.6<br>Ch

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18

Ding, L. P., S. L. He, D. C. Chen, et al. "Encapsulated Cd3P2 quantum dots emitting from the visible to the near infrared for bio-labelling applications." 2014. http://hdl.handle.net/10454/10441.

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No<br>Cd3P2 quantum dots (QDs) have been synthesized in both aqueous and high boiling point surfactant solutions via a gas-bubbling method. The synthesized QDs exhibit photoluminescent wavelengths spanning across the visible red to the near-infrared (NIR) spectral region. Two types of shell materials, SiO2 nanobeads and PS micro-spheres, have been employed to encapsulate the Cd3P2 QDs which provide protecting layers against physiological solutions. The coating layers are proven to enhance the optical and chemical stability of Cd3P2 QDs, and make the fluorescent particles capable of sustaining

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19

Lambert, Raphaël. "Étude de la solubilité du cadmium et du zinc dans les sols après ajouts d'engrais phosphatés contaminés en cadmium et en zinc." Thèse, 2006. http://hdl.handle.net/1866/16778.

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20

Amarakoon, Inoka. "Effects of mono-ammonium phosphate and preceding crop on plant cadmium uptake." 2010. http://hdl.handle.net/1993/4001.

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Cadmium (Cd) is a potentially toxic trace element. Two growth chamber studies were conducted to understand how: i) mono-ammonium phosphate affects durum wheat, flax or canola Cd uptake due to fertilizer induced changes in soil solution and plant; ii) preceding canola and barley affect the Cd uptake of subsequent durum wheat or flax. Durum wheat and flax shoot Cd concentrations were greater when grown on previous crop canola soil than when grown on previous crop barley soil regardless of what type of crop residue, if any, was added. The increase in Cd uptake for durum wheat and flax when on

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21

Lu, Shiang-Chin, and 呂相欽. "Synthesis and Structural Study of Tri(2-thiophenyl)phosphino Cadmium and Tin Complexes." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/kzr87u.

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碩士<br>國立中山大學<br>化學系研究所<br>96<br>In our previous studies on modeling methyl transfer protein, Ada protein, we found that zinc complexes of tri(2-thiophenyl)phosphine (PS3), (A), have similar methyl transfer behavior as its biological counter part. In order to probe the role of zinc in methylation process, we used tin and cadmium in model study to compare their chemistry relative to that of zinc. We found that all three metal complexes have similar chemistry and assume similar dimeric anion structure. For example, [Cd(PS3)]22-(1) and [Cd(SiPS3)]22-(2) have been successfully characterized cry

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22

"Effects of cadmium exposure on hormonal status and expression of metallothionein and glucose-6-phosphate dehydrogenase in silver sea bream, Sparus sarba." 2008. http://library.cuhk.edu.hk/record=b5896767.

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Man, Ka Yan.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.<br>Includes bibliographical references (leaves 101-126).<br>Abstracts in English and Chinese.<br>Chapter I. --- Title page --- p.i<br>Chapter II. --- Thesis committee --- p.ii<br>Chapter III. --- Acknowledgements --- p.iii<br>Chapter IV. --- Abstract (English) --- p.iv<br>Chapter V. --- Abstract (Chinese) --- p.vi<br>Chapter VI. --- Table of contents --- p.vii<br>Chapter VII. --- List of abbreviations --- p.xiii<br>Chapter VIII. --- List of figures --- p.xv<br>General introduction --- p.1<br>Chapter Chapter 1: --

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23

Syu, Chien-Hui, and 許健輝. "Effects of phosphate and carbonate on changes in release and speciation of cadmium in polluted soil under flooded condition." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/81375930818628804672.

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碩士<br>國立中興大學<br>土壤環境科學系所<br>98<br>The paddy soils polluted by heavy metals, resulting mainly from inappropriate applications of fertilizers or receiving metal-containing waters during irrigation, have become a serious agricultural problem in Taiwan. Among these metals, Cd attracts much scientific attention because rice, a major food in Taiwan, can uptake greatly this metal and accumulate in the grains. Understanding the chemical form of Cd in soils is relatively important while evaluating its mobility and bioavailability. However, Cd species correlated to rice uptake was less reported, particu

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24

Meerkotter, Maryke. "Sources of heavy metals in vegetables in Cape Town and possible methods of remediation." Thesis, 2012. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5235_1332924778.

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<p>Cape Town includes two vegetable farming areas within the city limits, the Joostenbergvlakte/Kraaifontein area and the Philippi area. Both areas supply produce to local markets and further afield. Sporadically, high levels of cadmium, copper, lead and zinc have been found to occur in some of the soils, irrigation water resources and crops. To find the sources of specifically Cd, Pb and Zn to these agricultural systems, extensive analysis of several heavy metals in inputs such as fertilizers, agrochemicals and supplementary water resources to these farming areas was undertaken. Heavy metal c

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25

Baptista, Sérgio Manuel Pratas. "Avaliação da resposta ao stresse oxidativo induzido por cádmio e cobre em plantas de tabaco transformadas e não transformadas." Master's thesis, 2009. http://hdl.handle.net/10400.5/1059.

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Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia<br>The response of tobacco plants (Nicotiana tabacum L.) non-transformed (WT) and transformed (B1F and B5H) with AtTPS1, the trehalose-6-phosphate-synthase gene from Arabidopsis, to cadmium (50, 200 μM) and copper (100, 400 μM) was compared. Protein content, antioxidative enzymes (CAT, POD, SOD, APX), lipid peroxidation and hydrogen peroxide were determined in leaves. WT showed a significant increase in malondialdehyde content both with Cd and Cu, indicating occurrence of lipid peroxidation. B5H and B1F showed lower inc

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