Relevant bibliographies by topics / Cadmium sulfure

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Academic literature on the topic 'Cadmium sulfure'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Cadmium sulfure"

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Julien-Pouzol, M., and S. Jaulmes. "Redétermination de la Structure du Sulfure de Cadmium et de Germanium, Cd4GeS6." Acta Crystallographica Section C Crystal Structure Communications 51, no. 10 (October 15, 1995): 1966–68. http://dx.doi.org/10.1107/s0108270195003763.

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Wang, Clifford L., Priya D. Maratukulam, Amy M. Lum, Douglas S. Clark, and J. D. Keasling. "Metabolic Engineering of an Aerobic Sulfate Reduction Pathway and Its Application to Precipitation of Cadmium on the Cell Surface." Applied and Environmental Microbiology 66, no. 10 (October 1, 2000): 4497–502. http://dx.doi.org/10.1128/aem.66.10.4497-4502.2000.

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ABSTRACT The conversion of sulfate to an excess of free sulfide requires stringent reductive conditions. Dissimilatory sulfate reduction is used in nature by sulfate-reducing bacteria for respiration and results in the conversion of sulfate to sulfide. However, this dissimilatory sulfate reduction pathway is inhibited by oxygen and is thus limited to anaerobic environments. As an alternative, we have metabolically engineered a novel aerobic sulfate reduction pathway for the secretion of sulfides. The assimilatory sulfate reduction pathway was redirected to overproduce cysteine, and excess cysteine was converted to sulfide by cysteine desulfhydrase. As a potential application for this pathway, a bacterium was engineered with this pathway and was used to aerobically precipitate cadmium as cadmium sulfide, which was deposited on the cell surface. To maximize sulfide production and cadmium precipitation, the production of cysteine desulfhydrase was modulated to achieve an optimal balance between the production and degradation of cysteine.
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Blais, J. F., R. D. Tyagi, J. C. Auclair, and C. P. Huang. "Comparison of Acid and Microbial Leaching for Metal Removal from Municipal Sludge." Water Science and Technology 26, no. 1-2 (July 1, 1992): 197–206. http://dx.doi.org/10.2166/wst.1992.0400.

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The metal removal from municipal sewage sludge was studied by acid treatment and two microbial leaching processes in laboratory reactors. The leaching potential of the three processes tested were compared from results obtained on twenty-three sludges, and the influence of solids content and types of sludges was also investigated. The use of a microbial leaching process with elemental sulfur and or ferrous sulfate as substrate permits to reduce considerably the quantity of acid required for metal extraction with a reduction of 100 and 83% respectively. Bioleaching process with sulfur as substrate and sulfur-oxidizing bacteria (bioreaction time of 5 days) was revealed to be better than the acid treatment process and microbial leaching with ferrous sulfate and iron-oxidizing bacteria (bioreaction time of 10 days) for solubilization of all metals tested. Microbial leaching process with ferrous sulfate as substrate permits a better solubilization of cadmium, copper, manganese and zinc than the acid tratment with sulfuric acid (1 day, at pH 1.5). However, the solubilization of aluminium, chromium, nickel and lead was less than acid leaching.
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Lahariya, Vikas. "Study of Electroluminescence in Cadmium Sulfide Polymer Nanocomposite Films." Journal of Nano Research 49 (September 2017): 181–89. http://dx.doi.org/10.4028/www.scientific.net/jnanor.49.181.

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Nanocrystalline cadmium sulfide/Polyvinyl alcohol composite films were prepared by chemical route using Cadmium acetate and hydrogen sulfide gas as cadmium and sulfur source respectively. Poly vinyl Alcohal (PVA) used as polymer matrix. The initially loading of cadmium precursor influences the size as well as photoluminescence and electroluminescence properties of the Composite film. The films were characterized by X Ray Diffraction (XRD), Atomic Force Microscopy (AFM) and UV-Visible Absorption spectra. The X-ray Diffraction result showed that CdS nanocrystals embedded in polymer matrix were in a zinc blend cubic structure. The UV-Visible absorption spectra of composite film reveal the blue shift in the band gap energy with respect to CdS bulk (2.42eV) material owing to quantum confinement effect. The Photoluminescence emission spectra show the green light emission at 510 nm arising from the defects states due to excess of cadmium or sulfur anion vacancies. Electroluminescence study indicates enhanced emission with low turn on voltage for higher loading of cadmium in polymer matrix due to increased oscillator strength. When higher electric field is applied, light emission start due to acceleration collision mechanism by charge carries inside the composite film.
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Sandoval Cárdenas, Diana Issell, Marlenne Gomez-Ramirez, Norma G. Rojas-Avelizapa, and Mónica Araceli Vidales-Hurtado. "Synthesis of Cadmium Sulfide Nanoparticles by Biomass of Fusarium oxysporum f. sp. lycopersici ." Journal of Nano Research 46 (March 2017): 179–91. http://dx.doi.org/10.4028/www.scientific.net/jnanor.46.179.

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This study describes extracellular biosynthesis of cadmium sulfide quantum dots by Fusarium oxysporum f. sp. lycopersici. Mycelia was incubated with a cadmium sulfate solution at 30°C and after 12 days the mixture became yellow, then the biomass was discarded through paper filtration. The filtrate containing extracellular cadmium sulfide quantum dots displayed increased UV-Vis absorption from 300 - 500 nm and fluorescence at 520 nm which was not shown when incubated without cadmium sulfide, thus indicating the presence of biologically synthesized quantum dots. Transmission electron microscope analysis of biologically synthesized quantum dots evinced individual 2 - 6 nm diameter circular nanoparticles of uniform size. Energy dispersive spectroscopy confirmed the presence of S and Cd. Additionally, this study showed the relevance in the use of positive and negative controls when evaluating the biosynthesis of CdS quantum dots using UV-Vis and fluorescence spectrophotometry.
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Podborska, Agnieszka, and Konrad Szaciłowski. "Towards 'Computer-on-a-Particle' Devices: Optoelectronic 1:2 Demultiplexer Based on Nanostructured Cadmium Sulfide." Australian Journal of Chemistry 63, no. 2 (2010): 165. http://dx.doi.org/10.1071/ch09440.

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Nanocrystalline sulfur-doped cadmium sulfide (CdS) prepared by microwave synthesis was investigated. Photoelectrochemical and optical characteristics of sulfur-doped CdS exhibit the photoelectrochemical photocurrent switching effect. Depending on the wavelength and applied bias, the anodic and/or cathodic photocurrent was observed. The unusual behaviour of nanocrystalline CdS allowed the construction of a combinatorial logic system from this material.
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Bang, Sang-Weon, Douglas S. Clark, and Jay D. Keasling. "Engineering Hydrogen Sulfide Production and Cadmium Removal by Expression of the Thiosulfate Reductase Gene (phsABC) from Salmonella enterica Serovar Typhimurium in Escherichia coli." Applied and Environmental Microbiology 66, no. 9 (September 1, 2000): 3939–44. http://dx.doi.org/10.1128/aem.66.9.3939-3944.2000.

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ABSTRACT The thiosulfate reductase gene (phsABC) fromSalmonella enterica serovar Typhimurium was expressed inEscherichia coli to overproduce hydrogen sulfide from thiosulfate for heavy metal removal (or precipitation). A 5.1-kb DNA fragment containing phsABC was inserted into the pMB1-based, high-copy, isopropyl-β-d-thiogalactopyranoside-inducible expression vector pTrc99A and the RK2-based, medium-copy,m-toluate-inducible expression vector pJB866, resulting in plasmids pSB74 and pSB77. A 3.7-kb DNA fragment, excluding putative promoter and regulatory regions, was inserted into the same vectors, making plasmids pSB103 and pSB107. E. coli DH5α strains harboring the phsABC constructs showed higher thiosulfate reductase activity and produced significantly more sulfide than the control strains under both aerobic and anaerobic conditions. Among the four phsABC constructs, E. coli DH5α (pSB74) produced thiosulfate reductase at the highest level and removed the most cadmium from solution under anaerobic conditions: 98% of all concentrations up to 150 μM and 91% of 200 μM. In contrast, a negative control did not produce any measurable sulfide and removed very little cadmium from solution. Energy-dispersive X-ray spectroscopy revealed that the metal removed from solution precipitated as a complex of cadmium and sulfur, most likely cadmium sulfide.
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Shew, C. F., and N. Kosaric. "Toxicity of Sulfite and Cadmium to Anaerobic Granular Sludge." Water Quality Research Journal 29, no. 4 (November 1, 1994): 581–98. http://dx.doi.org/10.2166/wqrj.1994.037.

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Abstract Toxicity of sulfite (Na2SO3) and cadmium (CdCl2) ions to anaerobic granular sludge was investigated in 1.2 litre bench-scale upflow anaerobic sludge blanket (UASB) reactors during process acclimation and shock load conditions. Minimal sulfite toxicity was observed under gradual and shock load conditions at sulfite concentrations of up to 1000 mg S/L if proper acclimation was allowed to occur. No long-term toxic effects were observed although the COD digestion rate was temporarily inhibited by shock load of sulfite. Scanning electron micrographs indicated that more sulfate-reducing bacteria were present in the granules developed in the reactors with sulfite supplement although rod-shaped Methanosaeta-like bacteria were still dominant. High bacterial growth rate was observed in the reactors which were supplied with the feed containing sulfite. The COD digestion rate was inhibited at a cadmium loading rate of 2.4 g Cd per day under both acclimation and shock load conditions. Acclimation did not seem to improve the bacteria to tolerate the toxicity of cadmium. The concentration of free cadmium was very low in the reactors under normal conditions, but increased rapidly when the COD digestion in the reactors ceased. The bacteria could not be reactivated after inhibited by cadmium. When reactors were operated at low specific COD loading rates, more inorganic precipitates were formed inside the granules which consequently settled faster.
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Soltani, Nayereh, Elias Saion, Mohd Zobir Hussein, Robiah Bt Yunus, and Manizheh Navaseri. "Characterization of CdS Nanoparticles Synthesized Using Microwave-Assisted Polyol Method." Advanced Materials Research 667 (March 2013): 122–27. http://dx.doi.org/10.4028/www.scientific.net/amr.667.122.

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Synthesis of cadmium sulfide (CdS) nanoparticles has been performed through the simple and rapid microwave-assisted polyol method, using cadmium chloride and thioacetamide as the cadmium and sulfur sources respectively. Attempts were made to control the size and crystallinity of the CdS nanoparticles by controlling microwave irradiation time and the initial molar ratio of the cadmium and sulfur sources. The structure of nanoparticles characterized by X-ray diffraction (XRD) was hexagonal. No peaks corresponding to impurities were detected, indicating the high purity of the product. The size of the prepared samples was calculated by Debye–Scherrer formula according to XRD spectra. The morphology of particles was observed in the transmission electron microscopy (TEM) images was spherical. The average size of nanoparticles was also estimated from these images. The optical absorption of CdS nanoparticles studied by UV-Visible spectroscopy showed a blue shift from bulk CdS due to quantum confinement. The size of nanoparticles was calculated by Brus formula according to UV-Visible spectrum and compared to XRD and TEM results.
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Shibata, Hiroomi, and Shigeki Kobayashi. "Characterization of a HMT2-like enzyme for sulfide oxidation from Pseudomonas putida." Canadian Journal of Microbiology 52, no. 8 (August 1, 2006): 724–30. http://dx.doi.org/10.1139/w06-022.

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The open reading frame pp0053, which has a high homology with the sequence of mitochondrial sulfide dehydrogenase (HMT2) conferring cadmium tolerance in fission yeast, was amplified from Pseudomonas putida KT2440 and expressed in Escherichia coli JM109(DE3). The isolated and purified PP0053-His showed absorption spectra typical of a flavin adenine dinucleotide (FAD)–binding protein. The PP0053-His catalyzed a transfer of sulfide-sulfur to the thiophilic acceptor, cyanide, which decreased the Km value of the enzyme for sulfide oxidation and elevated the sulfide-dependent quinone reduction. Reaction of the enzyme with cyanide elicited a dose-dependent formation of a charge transfer band, and the FAD-cyanide adduct was supposed to work for a sulfur transfer. The pp0053 deletion from P. putida KT2440 led to activity declines of the intracellular catalase and ubiquinone-H2 oxidase. The sulfide-quinone oxidoreductase activity in P. putida KT2440 was attributable to the presence of pp0053, and the activity showed a close relevance to enzymatic activities related to sulfur assimilation.Key words: HMT2-like enzyme, pp0053, Pseudomonas putida, sulfide oxidation.
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Dissertations / Theses on the topic "Cadmium sulfure"

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BOUCHENAKI, CHOUKRI. "Preparation, caracterisation et proprietes photothermiques bistables de couches minces de sulfure de cadmium." Université Louis Pasteur (Strasbourg) (1971-2008), 1991. http://www.theses.fr/1991STR13105.

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L'objectif de la these etait d'etudier la possibilite de realiser un dispositif seed (self-electrooptic effect device) a partir d'une couche mince de cds deposee sur un substrat transparent. Trois types de preparation ont ete etudies: evaporation sous vide, croissance epitaxiale sur caf2 par transport en phase vapeur a courte distance et pulverisation reactive. Les performances sont tres inferieures a celles attendues a partir du modele theorique existant bien que les couches sur caf2 et spray presentent les qualites optique et photoelectrique admises dans la theorie. L'investigation simultanee des proprietes physiques des couches (diffraction des rayons x, bord d'absorption d'urbach, photoconductivite, photoluminescence, etc. . . ) et de leurs caracteristiques bistables a permis de mettre en evidence les parametres du materiau intervenant dans le fonctionnement du seed. Le modele theorique a ete revu pour tenir compte de tous ces facteurs. Il a ete possible ainsi de comprendre l'origine des performances bistables modestes et de mettre en evidence les directives pour les ameliorer. Un seed presentant des caracteristiques quasi-optimales a 210 k a pu etre realise
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CHERKAOUI, EDDEQAQI NOUR-EDDINE. "Etude de la bistabilite absorptive dans le sulfure de cadmium : dynamique de commutation." Université Louis Pasteur (Strasbourg) (1971-2008), 1990. http://www.theses.fr/1990STR13037.

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Dans cette these, nous avons etudie les caracteristiques de la bistabilite absorptive intrinseque d'origine thermique dans le sulfure de cadmium (cds), a temperature ambiante. Cette bistabilite est due a un deplacement du bord d'absorption bande a bande vers les petites energies par echauffement local du cristal provoque par l'absorption du faisceau d'un laser a argon continu, dont l'energie de photon est voisine de celle de la bande interdite de cds. La commutation entre les niveaux de haute et de basse transmission est un processus lent avec des temps de reponse de l'ordre de la milliseconde, si l'intensite varie lentement. Mais, ces temps peuvent etre beaucoup reduits si, le faisceau continu du laser a argon maintenant le dispositif pres de son seuil de commutation, une impulsion breve apporte la quantite d'energie suffisante et permet au systeme d'atteindre rapidement la temperature correspondant au niveau de basse transmission. En outre, l'etude detaillee des processus de commutation a aussi permis d'observer d'autres effets. Un phenomene de ralentissement, lie a l'existence de la branche instable du cycle d'hysteresis et a la relaxation thermique du reseau cristallin, a ete etudie. De plus, l'influence de la diffusion transverse de la chaleur dans l'echantillon sur la dynamique de commutation a ete mise en evidence. Ces deux effets sont analyses avec des modeles simples de diffusion de la chaleur. Enfin, l'investigation spectrale et temporelle de la commutdation permet d'expliquer les processus d'excitations optiques, et donc, thermiques, des echantillons
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Oberlé, Jean. "Non-linearites optiques du sulfure de cadmium a la temperature ambiante : caracterisation et applications." Université Louis Pasteur (Strasbourg) (1971-2008), 1992. http://www.theses.fr/1992STR13026.

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Les non-linearites optiques (nlo) du sulfure de cadmium (cds) sont etudiees au voisinage de son bord d'absorption bande a bande a la temperature ambiante. Apres une caracterisation des proprietes optiques lineaires de plaquettes de cds, les applications des nlo optiques d'origine thermique aux bistabilites optiques absorptive et dispersive sont etudiees. Les temps et les energies de commutation de ces deux types de bistables sont evalues. Un systeme auto-oscillant est obtenu. Il resultat d'un couplage entre les nlo et cds et celles des miroirs d'une cavite fabry-perot. Les nlo d'origine electronique de cds sont egalement caracterises, en regimes picoseconde, nanoseconde et quasi-continu, par des experiences pompe et sonde et de melange d'ondes. Ces mesures montrent l'importance des nlo de cds que l'on utilise ensuite pour realiser des experiences d'adressage optique en regime picoseconde. Dans ces experiences, la birefringence naturelle des plaquettes de cds est mise a profit afin d'obtenir d'importantes modulations de l'intensite d'un faisceau laser sous l'action d'un autre faisceau de meme longueur d'onde. On peut ainsi realiser des dispositifs optiques cascadables
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Frégnaux, Mathieu. "Élaboration et caractérisation de nanocristaux de sulfure de cadmium - dépôt en couches minces nanostructurées." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0284/document.

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Deux méthodes de synthèse chimique, relevant de l'approche bottom-up, sont mises en oeuvre pour élaborer des nanocristaux (NC) de sulfure de cadmium (CdS) : les croissances (i) par source unique de précurseur et (ii) par voie micro-ondes. Ces deux techniques, complémentaires dans la gamme de tailles obtenues, permettent la réalisation de NC de petites tailles (2,8 nm - 5,2 nm) en seulement (i) 120 min et (ii) quelques minutes. Un protocole de caractérisation par techniques conjointes est mis au point pour étudier ces NC. La spectrométrie de masse (SM) couplée à des sources d'ionisation douce contrôle la pureté et la stabilité des précurseurs et permet d'estimer la taille et la distribution en taille des NC. Ces estimations sont confirmées par microscopie électronique en transmission (MET). La confrontation des résultats de SM et de MET suggère une géométrie des NC (i) sphérique et (ii) ellipsoïdale. La diffraction des rayons X montre l'état cristallin des nanoparticules en structures (i) würtzite et (ii) zinc blende. La spectrométrie optique à température ambiante (absorption et photoluminescence - PL) témoigne des effets de confinement quantique par le glissement de la réponse excitonique dans le domaine bleu proche UV en fonction de la taille des NC, s'inscrivant dans la correspondance connue énergie-taille. Dans la perspective d'applications optoélectroniques, le dépôt en couches minces de polymère (PMMA) contenant des NC de CdS est entrepris par spin coating. Le même protocole de caractérisations, enrichi de techniques adaptées aux couches minces, montre que les NC conservent leur intégrité et leurs propriétés de PL après inclusion dans la couche
Two chemical methods are developed to synthesize cadmium sulfide (CdS) nanocrystals (NC) in bottom-up approach: (i) single-source precursor methodology and (ii) microwave synthetic route. These two growth techniques are complementary in the size range obtained and allow production of small NC (2.8 nm - 5.2 nm) in only (i) 120 min and (ii) some minutes. A joint technique characterization protocol is developed to study the synthesized NC. Mass spectrometry (MS) coupled to soft ionization sources allows to control the purity and stability of the precursors and to estimate the NC size and size distribution. These estimations are confirmed by transmission electron microscopy (TEM). Comparison between SM and TEM results suggests that NC have (i) spherical and (ii) prolate shapes. X-ray diffraction reveals nanoparticle crystalline structure in (i) wurtzite and (ii) zinc blende symmetries. Room temperature optical spectrometry (absorption and photoluminescence - PL) evidences quantum confinement effects by the shift of the excitonic response as a function of the NC size, in the blue-UV spectral range. These results are consistent with the well-known empirical energy-size correspondence. For optoelectronic application purpose, thin film deposition of polymer (PMMA) containing CdS NC is initiated by spin coating. The previous characterization protocol, extended to techniques dedicated to thin film studies, shows that NC maintain their integrity and PL properties after inclusion in PMMA layer
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Djazouli, Nasr-Eddine. "Biolixiviation du sulfure de cadmium en présence de thiobacillus ferrooxiadans : optimisation des paramètres opératoires et réalisation d'un procédé en cuve agitée." Châtenay-Malabry, Ecole centrale de Paris, 1994. http://www.theses.fr/1994ECAP0393.

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La biolixiviation permet de mettre en solution des composes métalliques à l'aide microorganismes spécifiquement adaptés. C'est dans ce but que nous avons étudié la biolixiviation du sulfure de cadmium en présence des bactéries thiobacillus ferrooxidans. Nous avons entamé notre étude avec une partie bibliographique qui nous a permis de faire le point sur les différentes formes d'interaction métal-microorganisme, sur les facteurs affectant l'activité bactérienne, ainsi que sur les possibilités de réaliser des procèdes de biolixiviation. Dans une première partie nous avons montré que la cinétique de lixiviation de CdS, en milieu acide stérile, était très lente. Elle est néanmoins améliorée par la présence de sulfate ferrique dans le milieu. La lixiviation de CdS en milieu inocule est réalisée en présence des bactéries T. Ferrooxidans et T. Thiooxidans. La cinétique de lixiviation se trouve améliorée par rapport au milieu stérile, mais les bactéries T. Ferrooxidans se révèlent les plus aptes à lixivier le CdS et les plus résistantes à la présence du cadmium. Par contre, la présence de sulfate ferrique dans le milieu inocule, permet une nette amélioration de la cinétique. Nous avons montré l'existence d'un effet de combinaison entre l'oxydation directe de CdS par T. Ferrooxidans et l'oxydation indirecte par Fe2(SO4)3 du fait de la régénération de l'ion ferrique par les bactéries. Nous avons par la suite optimise les paramètres physico-chimiques affectant la biolixiviation de CdS par T. Ferrooxidans en étudiant l'influence de la granulométrie des particules et de la densité de pulpe de CdS. Le procédé de lixiviation de CdS a été réalisé, dans une première étape en discontinu, avec un mélange CdS-sable afin de simuler un minerai réel. Afin de pouvoir récupérer le cadmium dissout nous avons opté ensuite pour le renouvellement du milieu avec des débits de dilutions inférieurs au taux de croissance bactérien afin d'éviter l'érosion bactérienne due à l'adsorption des bactéries sur les particules de sable. Ce procèdé présentait l'inconvénient d'une variation du pH due à la consommation d'acide par la gangue. L'amélioration du procédé est réalisée par l'alimentation du réacteur en solution acide riche en Fe2(SO4)3. Cette solution est récupérée de la biolixiviation de la pyrite (feS2) en présence de t. Ferrooxidans. Cela a permis de stabiliser le pH et la concentration de l'ion ferrique dans le milieu, avec pour conséquence, une meilleure productivité en CdS lixivié.
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Ebothe, Jean. "Etude des propriétés photoélectrochimiques des couches minces polycristallines de sulfure de cadmium déposées par pulvérisation réactive." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37604791d.

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Ortega, Borges Raúl. "Etude du depot de couches minces semiconductrices de sulfure de cadmium par voie chimique en solution." Paris 6, 1994. http://www.theses.fr/1994PA066749.

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L'etude du depot de couches minces de cds par voie chimique en solution a ete etudie par des mesures in situ de capacite et de microbalance a quartz. Des informations concernant les proprietes de couverture de la couche, sa structure et son evolution pendant la croissance ont ete obtenues. Un modele de croissance colonnaire est ainsi propose pour expliquer les differences de structure observees, selon les conditions de depot. L'influence de differents parametres (concentrations de reactifs, temperature) a ete etudiee puis expliquee par un mecanisme de croissance de type atome par atome, mettant en jeu des etapes de reaction a la surface du substrat. Des expressions analytiques donnant la vitesse de depot en fonction des concentrations en solution sont obtenues a partir du modele de croissance considere. L'etude des caracteristiques des couches (composition, proprietes optiques et structure interne) montre qu'elles dependent des conditions de depot et donne des elements en appui du mecanisme considere. Des etudes concernant le depot de cds sur du cuinse#2 mettent en evidence des interactions entre ce substrat et la solution de depot. La formation d'une interface graduee cuinse#2/cdse/cds est envisagee, ce qui pourrait expliquer le succes de cette methode pour la fabrication de photopiles performantes. L'ensemble de resultats obtenus permet une meilleure comprehension du processus de depot et ainsi que l'optimisation et le controle du processus
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Ebothe, Jean. "Etude des proprietes photoelectrochimiques des couches minces polycristallines de sulfure de cadmium deposees par pulverisation reactive." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13012.

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Preparation de couches d'epaisseur inferieure a 3 mu m dans des conditions de depot fixes; analyse de leur microstructure et mise en evidence de la croissance de deux types de grains differant par la taille et la forme generale; absence d'effet de la nature du substrat. Variation de l'absorption optique, de la concentration de porteurs de charge et de la photoconductivite en fonction de l'epaisseur; role du substrat. Traitement des surfaces par l'ammoniaque; modifications de la texture et conditions optimales de traitement. Influence du milieu de recuit sur la texture et les caracteristiques courant-tension
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RIBLET, PHILIPPE. "Etude comparee des nonlinearites optiques de nanocristaux et de monocristaux de sulfure et seleniure de cadmium." Université Louis Pasteur (Strasbourg) (1971-2008), 1995. http://www.theses.fr/1995STR13102.

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Les nonlinearites optiques du troisieme ordre du sulfure de cadmium (cds) et du seleniure de cadmium (cdse) sous forme de monocristaux et de nanocristaux sont etudiees au voisinage de leur bord d'absorption bande a bande ainsi qu'a des transitions d'energie plus elevees. Apres une caracterisation des nanocristaux de cds fabriques par la methode sol-gel et des verres borosilicates dopes au cdse, les nonlinearites optiques de ces materiaux sont etudiees et comparees a celles de cds sous forme de monocristaux par des experiences de melange d'ondes et de variation d'absorption induite ainsi que d'absorption biphotonique. Ces mesures apportent des donnees nouvelles sur l'efficacite et la dynamique des processus optiques nonlineaires dans ces materiaux. Elles ont permis de determiner les durees de vie des porteurs photo-crees, les temps de coherence, ainsi que leurs caracteristiques de diffusion. Le couplage electron-phonon et l'importance des effets de surface dans les nanocristaux sont egalement discutes
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SENE, CHEIKH. "Proprietes electrochimiques et photovoltaiques du poly(methyl-3 thiophene) electrolytique sur films polycristallins de sulfure de cadmium." Université Louis Pasteur (Strasbourg) (1971-2008), 1992. http://www.theses.fr/1992STR13155.

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Le poly(methyl-3 thiophene) a ete greffe sous la forme de couches minces par des techniques electrochimiques sur des electrodes polycristallines de sulfure de cadmium dope a l'aluminium cds(al). Les proprietes structurales, electroniques et electrochimiques ont ete analysees en fonction de divers parametres impliques dans la synthese. Le contact electronique issu de ce greffage conduit lorsque le poly(methyl-3 thiophene) est fortement dope, a une barriere de type schottky. Les proprietes de ces barrieres sont decrites. La photoreponse de ces dispositifs est determinee par les proprietes electrooptiques de cds(al). Les densites de porteurs de charges relativement elevees dans ces couches sont affectees par la diffusion d'impuretes provenant de la couche sous-jacente d'oxyde d'etain-indium (ito). L'etude des caracteristiques photovoltaiques des cellules a permis d'etablir des correlations entre les conditions d'elaboration du poly(methyl-3 thiophene) et les performances de ces cellules. Des rendements de conversions proches de 2% sont obtenus en realisant la synthese du polymere par activation prealable de la surface de cds(al)
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Books on the topic "Cadmium sulfure"

1

Böer, K. W. The life of a solar pioneer, Karl Wolfgang Böer: Opportunities, challenges, obligations. Bloomington, IN: iUniverse, 2010.

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National Research Council (U.S.). Subcommittee on Zinc Cadmium Sulfide., ed. Toxicologic assessment of the Army's zinc cadmium sulfide dispersion tests. Washington, D.C: National Academy Press, 1997.

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Toxicologic Assessment of the Army's Zinc Cadmium Sulfide Dispersion Tests. Washington, D.C.: National Academies Press, 1997. http://dx.doi.org/10.17226/5739.

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Toxicologic Assessment of the Army's Zinc Cadmium Sulfide Dispersion Tests. Washington, D.C.: National Academies Press, 1997. http://dx.doi.org/10.17226/5761.

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Gochfeld, Michael, and Robert Laumbach. Chemical Hazards. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190662677.003.0011.

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Building on the principles of toxicology, this chapter describes chemicals by structure, source, use, mechanism of action, environmental properties, and target organ. Major advances in toxic effects include more detailed understanding of the mechanisms by which toxic chemicals damage receptors at the subcellular, cellular, and organ level. The chapter describes properties of various types of inorganic and organic chemicals and their adverse health effects. It discusses asphyxiants, such as carbon monoxide and hydrogen sulfide; heavy metals, such as lead, mercury, and cadmium; organic solvents, such as benzene and trichlorethylene; pesticides, including chlorinated hydrocarbons and organophosphates; and a variety of other toxic chemicals to which people are exposed in the home, community, or workplace environment. Several cases are presented to illustrate various concepts concerning chemical hazards in occupational and environmental health.
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National Research Council (U.S.). Subcommittee on Zinc Cadmium Sulfide., ed. Toxicologic assessment of the Army's zinc cadmium sulfide dispersion tests : answers to commonly asked questions. Washington, D.C: National Academy Press, 1997.

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Chen, Yichang. Interactions between sulfur nutrition and cadmium toxicity in barley seedlings (Hordeum vulgare L. cv. UC 476). 1994.

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Krystyna, Zabludowska, and United States. National Aeronautics and Space Administration., eds. Review of methods for preparation of zinc and cadmium sulfide, selenide and telluride single crystals. Washington DC: National Aeronautics and Space Administration, 1986.

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Wagner, Robert Edward *. A study of four cadmium sulfide/polysulfide photoelectrochemical cells via photothermal deflection spectroscopy and various electronic measurements. 1988.

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G, Morrow, Goddard Space Flight Center, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. The 1985 Goddard Space Flight Center Battery Workshop: Proceedings of a workshop at NASA Goddard Space Flight Center, Greenbelt, Maryland, November 19-21, 1985. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Book chapters on the topic "Cadmium sulfure"

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Gooch, Jan W. "Cadmium Sulfide." In Encyclopedic Dictionary of Polymers, 108. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_1804.

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Sadovnikov, Stanislav I., Andrey A. Rempel, and Aleksandr I. Gusev. "Nanostructured Lead Sulfide PbS." In Nanostructured Lead, Cadmium, and Silver Sulfides, 31–126. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56387-9_2.

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Sadovnikov, Stanislav I., Andrey A. Rempel, and Aleksandr I. Gusev. "Nanostructured Cadmium Sulfide CdS." In Nanostructured Lead, Cadmium, and Silver Sulfides, 127–88. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56387-9_3.

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Sadovnikov, Stanislav I., Andrey A. Rempel, and Aleksandr I. Gusev. "Nanostructured Silver Sulfide Ag2S." In Nanostructured Lead, Cadmium, and Silver Sulfides, 189–312. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56387-9_4.

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Yates, John T. "Cadmium Sulfide Evaporation Source." In Experimental Innovations in Surface Science, 662–63. New York, NY: Springer New York, 1997. http://dx.doi.org/10.1007/978-1-4612-2304-7_196.

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Feenstra, R. M., and S. W. Hla. "2.3.5 CdSe, Cadmium Selenide, and CdS, Cadmium Sulfide." In Physics of Solid Surfaces, 49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47736-6_22.

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Matsumura, Michio, Yukinari Saho, and Hiroshi Tsubomura. "Cadmium Sulfide Photocatalyzed Hydrogen Production from Aqueous Solutions of Sulfite." In Homogeneous and Heterogeneous Photocatalysis, 581–91. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4642-2_34.

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Witkamp, G. J., and G. M. Rosmalen. "Cadmium Incorporation in Calcium Sulfate Modifications." In Environmental Technology, 148–50. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3663-8_18.

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Anjum, N. A., S. Umar, S. Singh, R. Nazar, and Nafees A. Khan. "Sulfur Assimilation and Cadmium Tolerance in Plants." In Sulfur Assimilation and Abiotic Stress in Plants, 271–302. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-76326-0_13.

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Lincot, D., and J. Vedel. "Chemical Bath Deposition of Cadmium Sulfide Thin Films." In Tenth E.C. Photovoltaic Solar Energy Conference, 931–34. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3622-8_238.

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Conference papers on the topic "Cadmium sulfure"

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VOROKH, A. S., N. S. KOZHEVNIKOVA, A. A. REMPEL, and A. MAGERL. "DISORDERING IN CADMIUM SULFIDE NANOPARTICLES." In Proceedings of the International Conference on Nanomeeting 2007. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812770950_0068.

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Siripornadulsil, Surasak, and Wilailak Siripornadulsil. "Characterization of Cadmium-Resistant Bacteria and Their Application for Cadmium Bioremediation." In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16072.

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On a global basis, trace-metal pollution is one of the most pervasive environmental problems. It is particularly difficult to prevent or clean up because the metals are toxic in their elemental form and cannot be decomposed. Bioremediation has been shown to be a powerful system for heavy metal pollution clean up and prevention. In this work, we characterized the cadmium (Cd)-resistant bacteria isolated from rice field soil downstream from zinc (Zn) mineralized area which the owners were contaminated at high level of cadmium content in their blood (>10 μgCd/g creatinine). We found that all 24 isolated bacteria tolerated toxic Cd concentrations (2,500 μM). In order to determine whether the Cd toxicity affected the growth of isolated bacteria, we grew the isolated bacterial cells in the absence and presence of toxic concentrations of CdCl2 (500 μM). In the absence of Cd, all isolated bacterial cells grew slightly better than in the presence of toxic concentrations of Cd. In addition, the Cd binding capacity of all isolated bacteria were very high, ranging from 6.38 to 9.38 log[Cd(atom)]/cell when grown in the presence of 500 μM CdCl2. Furthermore, the stability of Cd-bacteria complex of all isolated bacteria was affected by 1mM EDTA. When grown in the presence of 500 μM CdCl2, Cd-resistant isolates S2500-6, -8, -9, -15, -17, -18, -19, and -22 increasingly produced proteins containing cysteine (SH-group) (from 1.3 to 2.2 times) as well as 11 isolates of Cd-resistant bacteria, including S2500-1, -2, -3, -5, -6, -8, -9, -11, -16, -20, and -21, increasingly produced inorganic sulfide (1.5 to 4.7 times). Furthermore, the Sulfur K-edge X-ray absorption near-edge structure (XANES) spectroscopy studies indicated that Cd-resistant isolated S2500-3 precipitated amounts of cadmium sulfide (CdS), when grown in the presence of 500 μM CdCl2. The results suggested that these Cd-resistant bacteria have potential ability to precipitate a toxic soluble CdCl2 as nontoxic insoluble CdS. Interestingly, Cd-resistant bacteria isolated S2500-3, -8, -9,and -20 increased cadmium tolerance of Thai jasmine rice (Kao Hom Mali 105) when grown in the presence of 200 μM CdCl2. These 4 isolates also decreased cadmium concentration accumulation in Kao Hom Mali 105 plant at 61, 9, 6, and 17%, respectively when grown in the presence of 200 μM CdCl2. They were identified by 16S rDNA sequence analysis and classified as Cupriavidus taiwanensis (isolate S2500-3) and Pseudomonas aeruginosa (isolates S2500-8, -9, and -20).
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Albina, Dionel O., and Nickolas J. Themelis. "Emissions From Waste-to-Energy: A Comparison With Coal-Fired Plants." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55295.

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Nationwide data of the emissions from waste-to-energy and coal-fired power plants arecompared. The emissions of sulfur dioxide and hydrogen chloride, particulate matter, nitrogen oxides and trace elements, such as cadmium, lead and mercury are compared, both in terms of thermal energy input and electrical energy output. The results of the study have shown that emissions of sulfur dioxide, particulate matter and nitrogen oxides were lower from waste-to-energy (WTE) facilities than from coal-fired plants. Hydrogen chloride emissions are higher in WTE flue gases. Emissions of cadmium, lead and mercury from WTE and coal-fired plants are nearly the same.
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Bhattarai, Bibek Raj, Amrit Regmi, and Surendra K. Gautam. "Cadmium Sulfide Nanoparticles: Synthesis and Characterization." In 2019 International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2). IEEE, 2019. http://dx.doi.org/10.1109/ic4me247184.2019.9036654.

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Jensen, D. G., B. E. McCandless, and R. W. Birkmire. "Thin film cadmium telluride-cadmium sulfide alloys and devices [solar cells]." In Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996. IEEE, 1996. http://dx.doi.org/10.1109/pvsc.1996.564242.

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Ghani, M., S. V. Slycken, E. Meers, F. M. G. Tack, F. Naz, and S. Ali. "Enhanced Phytoextraction of Cadmium and Zinc Using Rapeseed." In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96362.

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In a green house pot experiment, the effects of three amendments, sulphur (S), ammonium sulphate ((NH4)2SO4) and ethylenediaminetetracetic acid (EDTA) were tested for phytoextraction of Cd and Zn by rapeseed (Brassica napus L.). Elemental sulphur was applied as 20.00, 60.00, and 120.00 mg.kg−1 soil. EDTA was tested at a dose of 585.00 mg.kg−1 soil, and (NH4)2SO4) at a rate of 0.23 mg.kg−1 soil. All treatments received a base fertilization (Hogland) before sowing. Plants were harvested after 51 days of growth and shoot dry matter and soil samples were analysed for metal contents. All amendments caused a significant increase in Cd and Zn contents in plant shoots of all treatments than control treatment. Further, EDTA was most effective for extraction metals concentrations in shoot biomass but the plants showed significant signs of toxicity and yield were severely depressed. The addition of sulfur favorably influenced plant biomass production. The fertilized ammonium sulfate treatment resulted in the highest phytoextraction of Cd and Zn and the amounts of these metals accumulated in plant shoot exceeded by a factor of 4 and 3 respectively. Finally, Brassica napus could be used for soil remediation keeping its other uses which will make the contaminated site income generating source for the farmers.
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Mishra, Sheo K., Akhilesh Tripathi, Rajneesh K. Srivastava, K. C. Dubey, and R. K. Shukla. "Investigation of photoresponse in cadmium sulfide nanoparticles." In NANOFORUM 2014. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4918090.

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SEMENOVA, E. M., S. A. VOROBYOVA, and A. I. LESNIKOVICH. "SYNTHESIS OF CADMIUM SULFIDE COATED MAGNETIC NANOPARTICLES." In Proceedings of International Conference Nanomeeting – 2011. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814343909_0079.

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Palanisamy, Barath, Yu-Wei Su, Anna Garrison, Brian Paul, and Chih-hung Chang. "Cadmium Sulfide Nanoparticle Synthesis Using Oscillatory Flow Mixing." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50276.

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Microchannel mixers enable faster mixing times compared with batch stir mixing leading to the promise of higher throughput, better yields and less solvent usage for the solution-phase reactive precipitation of inorganic nanoparticles. However, reliance on diffusive transport for subsecond mixing requires channel dimensions in the tens of micrometers. These channel dimensions make diffusive micromixers vulnerable to clogging. In this paper, an oscillatory flow mixing strategy is explored to increase the contact area between reagents within larger microchannels. Forward and reverse oscillatory signals are designed to pump reactants through a 450 μm high serpentine microchannel to increase advection within the flow. Computational fluid dynamics simulations are performed to provide insight into flow behavior and nanoparticle morphology. Quantification of mixing performance is proposed using mixing quality and particle residence time metrics. Experimental validation is pursued through the reactive precipitation of CdS quantum dots using a reverse oscillatory mixing setup. Transmission electron microscopy provides insights into the particle size distribution and particle crystallinity.
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Stadnik, V. A. "Structure of absorption autowaves (domains) in cadmium sulfide." In XIV International Conference on Coherent and Nonlinear Optics, edited by Nikolay N. Rosanov. SPIE, 1992. http://dx.doi.org/10.1117/12.131803.

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Reports on the topic "Cadmium sulfure"

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Hogle, Howard. An investigation of cadmium and sulfur reactions in dimethylsulfoxide. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.3204.

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Richard, Jeffrey. Cathodic depositions of the compound semiconductor cadmium sulfide. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.571.

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Nettel, S., and R. MacCrone. Stabilization of high Tc superconductivity in cadmium sulfide. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/7249584.

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MacCrone, R. K., and S. J. Nettel. Stabilization of high {Tc} superconductivity in cadmium sulfide. Final report. Office of Scientific and Technical Information (OSTI), December 1991. http://dx.doi.org/10.2172/10164966.

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