Готові списки джерел за темами / Metal selenide

Добірка наукової літератури з теми "Metal selenide"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Metal selenide"

1

Sarret, Géraldine, Laure Avoscan, Marie Carrière, Richard Collins, Nicolas Geoffroy, Francine Carrot, Jacques Covès, and Barbara Gouget. "Chemical Forms of Selenium in the Metal-Resistant Bacterium Ralstonia metallidurans CH34 Exposed to Selenite and Selenate." Applied and Environmental Microbiology 71, no. 5 (May 2005): 2331–37. http://dx.doi.org/10.1128/aem.71.5.2331-2337.2005.

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ABSTRACT Ralstonia metallidurans CH34, a soil bacterium resistant to a variety of metals, is known to reduce selenite to intracellular granules of elemental selenium (Se0). We have studied the kinetics of selenite (SeIV) and selenate (SeVI) accumulation and used X-ray absorption spectroscopy to identify the accumulated form of selenate, as well as possible chemical intermediates during the transformation of these two oxyanions. When introduced during the lag phase, the presence of selenite increased the duration of this phase, as previously observed. Selenite introduction was followed by a period of slow uptake, during which the bacteria contained Se0 and alkyl selenide in equivalent proportions. This suggests that two reactions with similar kinetics take place: an assimilatory pathway leading to alkyl selenide and a slow detoxification pathway leading to Se0. Subsequently, selenite uptake strongly increased (up to 340 mg Se per g of proteins) and Se0 was the predominant transformation product, suggesting an activation of selenite transport and reduction systems after several hours of contact. Exposure to selenate did not induce an increase in the lag phase duration, and the bacteria accumulated approximately 25-fold less Se than when exposed to selenite. SeIV was detected as a transient species in the first 12 h after selenate introduction, Se0 also occurred as a minor species, and the major accumulated form was alkyl selenide. Thus, in the present experimental conditions, selenate mostly follows an assimilatory pathway and the reduction pathway is not activated upon selenate exposure. These results show that R. metallidurans CH34 may be suitable for the remediation of selenite-, but not selenate-, contaminated environments.
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2

Gu, Xingxing, Tianyu Tang, Xiaoteng Liu, and Yanglong Hou. "Rechargeable metal batteries based on selenium cathodes: progress, challenges and perspectives." Journal of Materials Chemistry A 7, no. 19 (2019): 11566–83. http://dx.doi.org/10.1039/c8ta12537f.

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Rechargeable metal batteries using selenium or selenide as the cathodes have attracted considerable attention during the past few years owing to selenium/selenide possessing a high volumetric energy density that is comparable to that of sulfur, a moderate output voltage and characteristics of environmental benignity.
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3

Hou, Bo, David Benito-Alifonso, Richard F. Webster, David Cherns, M. Carmen Galan, and David J. Fermín. "Synthetic Mechanism Studies of Iron Selenides: An Emerging Class of Materials for Electrocatalysis." Catalysts 11, no. 6 (May 27, 2021): 681. http://dx.doi.org/10.3390/catal11060681.

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Solution-processed iron selenide nanocrystals (NCs) have recently attracted considerable attention in electrocatalysis water splitting. Nevertheless, a primary challenge in current iron-based NCs chemical synthesis is controlling phase purities between each chalcogen (monochalcogenide, dichalcogenides, and oxides), which requires a comprehensive understanding of the reaction mechanisms at the early stages of nucleation. Herein, we investigate the fundamental steps in transforming molecular organoiron and organoselenium precursors to iron selenides NCs with the view of developing universal synthesis protocols for phase pure metal selenium and metal oxides NCs. The main intermediate species and volatile by-products are identified by high-resolution electron microscopy and Nuclear Magnetic Resonance (NMR) spectroscopy (1H, 13C, and 31P). Experimental evidence suggests that the phase determining factor is the coordinating reactivity difference between olefins (1-octadecene, oleylamine), tributylphosphine and trioctylphosphine associated with their corresponding Se bond cleavage. This work proposes organoselenium interconversion reaction mechanisms during iron selenides synthesis, offering a universal synthetic strategy for other electrocatalytically or photocatalytically active layered metal selenides materials.
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4

Zhang, Ya Hui, Xi Cheng, and Qing Wang. "The Synthesis and Properties of Metal Selenide Nanostructures." Applied Mechanics and Materials 723 (January 2015): 540–43. http://dx.doi.org/10.4028/www.scientific.net/amm.723.540.

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Metal selenide has been the subject of considerable interest because of its potential applications in many fields. In this paper, the synthesis of metal selenide nanostructures is described. The Morphologies of as prepared metal selenide nanostructures are summarized. And the applications and prospects of metal selenide in this field also are analyzed.
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5

Zhang, Ya Hui, Xi Cheng, and Qing Wang. "The New Progress on Synthesis of Cadmium Selenide and Lead Selenide Nanostructures." Applied Mechanics and Materials 723 (January 2015): 536–39. http://dx.doi.org/10.4028/www.scientific.net/amm.723.536.

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Cadmium Selenide and Lead Selenide have been the subject of considerable interest because of its potential applications in many fields. In this paper, the synthesis of Cadmium Selenide and Lead Selenide nanostructures is described. The Morphologies of as prepared metal selenide nanostructures are summarized. And the applications and prospects of metal selenide in this field also are analyzed.
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6

Heymann, Gunter, and Elisabeth Selb. "Li2Pt3Se4: a new lithium platinum selenide with jaguéite-type crystal structure by multianvil high-pressure/high-temperature synthesis." Zeitschrift für Naturforschung B 71, no. 11 (November 1, 2016): 1095–104. http://dx.doi.org/10.1515/znb-2016-0165.

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AbstractThe monoclinic lithium platinum selenide Li2Pt3Se4 was obtained via a multianvil high-pressure/high-temperature route at 8 GPa and 1200°C starting from a stoichiometric mixture of lithium nitride, selenium, and platinum. The structure of the ternary alkali metal-transition metal-selenide was refined from single-crystal X-ray diffractometer data: P21/c (no. 14), a=525.9(2), b=1040.6(2), c=636.5(2) pm, β=111.91(1)°, R1=0.0269, wR2=0.0569 (all data) for Li2Pt3Se4. Furthermore, the isostructural mineral phases jaguéite (Cu2Pd3Se4) and chrisstanleyite (Ag2Pd3Se4) were reinvestigated in their ideal stoichiometric ratio. The syntheses of the mineral phases were also carried out under multianvil conditions. Single-crystal data revealed a hitherto not described structural disorder of the transition metal atoms.
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7

Esjan, Magauiya, B. Bekturgan, Duisek Kamysbayev, Bazarbay Serikbaev, and Azimbek Kokanbaev. "Preparation of two-dimensional atomic crystal nanofilm of bismuth selenide of a large area." Chemical Bulletin of Kazakh National University, no. 2 (June 5, 2020): 38–45. http://dx.doi.org/10.15328/cb1049.

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A synthesis of bismuth selenide with a thickness of 3-4 nm on the surface of mica taken as a matrix was investigated using the gas-solid mechanism. Since discovery of two-dimensional atomic crystals of graphene in 2004, scientists have grown interested in exploring methods for synthesis of two-dimensional atomic crystal nanofilms. Among them, of particular interest are sulfides and transition metal selenides, such as molybdenum sulfide, tungsten selenide, bismuth selenide. Bismuth selenide possesses special thermoelectric, photoelectric properties, therefore there are wide possibilities for its use in such areas as thermoelectric devices, photosensitive elements, optical information keepers, etc. In this connection, there are many studies on the search for optimal methods for the synthesis of bismuth selenide. Each of the proposed methods has its own advantages and disadvantages. In the article, a variety of the recently used gas-liquid-solid mechanism (V-L-S) is used as a method for the synthesis of bismuth selenide. When using amorphous silicon dioxide as a matrix, the synthesized bismuth selenide is not uniform, and the synthesis process is uncontrollable. Therefore, in the work fluorinated gold mica was used as a matrix. The effect of temperature, gas feed rate on the size, shape and thickness of the film was investigated.
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8

Turlygaziyeva, Aidana, Gulmira Rakhymbay, Yeldana Bakhytzhan, Akmaral Argimbayeva, and Bibisara Burkitbayeva. "Electrochemical polymerization of poly(aniline-o-anisidine) and its anticorrosion properties." Chemical Bulletin of Kazakh National University, no. 2 (June 5, 2020): 30–36. http://dx.doi.org/10.15328/cb1110.

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Анотація:
A synthesis of bismuth selenide with a thickness of 3-4 nm on the surface of mica taken as a matrix was investigated using the gas-solid mechanism. Since discovery of two-dimensional atomic crystals of graphene in 2004, scientists have grown interested in exploring methods for synthesis of two-dimensional atomic crystal nanofilms. Among them, of particular interest are sulfides and transition metal selenides, such as molybdenum sulfide, tungsten selenide, bismuth selenide. Bismuth selenide possesses special thermoelectric, photoelectric properties, therefore there are wide possibilities for its use in such areas as thermoelectric devices, photosensitive elements, optical information keepers, etc. In this connection, there are many studies on the search for optimal methods for the synthesis of bismuth selenide. Each of the proposed methods has its own advantages and disadvantages. In the article, a variety of the recently used gas-liquid-solid mechanism (V-L-S) is used as a method for the synthesis of bismuth selenide. When using amorphous silicon dioxide as a matrix, the synthesized bismuth selenide is not uniform, and the synthesis process is uncontrollable. Therefore, in the work fluorinated gold mica was used as a matrix. The effect of temperature, gas feed rate on the size, shape and thickness of the film was investigated.
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9

Liu, Fangyang, Can Han, Liangxing Jiang, Jie Li, and Yexiang Liu. "Dynamic analysis on metal selenide electrodeposition." Journal of Solid State Electrochemistry 18, no. 7 (February 27, 2014): 1833–45. http://dx.doi.org/10.1007/s10008-014-2396-0.

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10

Nielsen, Søren Achim, and Jørgen Clausen. "The Use of Marine Algae for Evaluation of Heavy Metal Pollution." Alternatives to Laboratory Animals 17, no. 3 (March 1990): 250–54. http://dx.doi.org/10.1177/026119299001700325.

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The phytoplankton species Chlorella stigmatophora was used to monitor the effect of lead (as lead chloride). In order to standardise the toxicity assay, initial low concentrations of algae were used during optimal supply with nutrients, to avoid the problem of light shading. The growth rates of control algae were compared during 3–4 doubling periods with those exposed to 98-980nM lead. Since heavy metals may influence enzymic activities, e.g. of selenium-containing glutathione peroxidase by precipitating selenium as selenium selenide, the growth rate was compared with the specific glutathione peroxidase activity. Our data demonstrate that it is possible to monitor for lead toxicity (and other heavy metal toxicity) both by decrease in growth rate and by inhibition of enzymic activity. Since cultivation of unicellular algae is relatively simple, it should be possible to use such systems for ecotoxicological screening.
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Дисертації з теми "Metal selenide"

1

Kamada, Rui. "Copper(indium,gallium)selenide film formation from selenization of mixed metal/metal-selenide precursors." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 226 p, 2009. http://proquest.umi.com/pqdweb?did=1654501631&sid=4&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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2

Boscher, Nicolas D. "Atmospheric pressure chemical vapour deposition of transition metal selenide thin films." Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1444549/.

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This thesis investigates the formation of thin films of metal selenides via atmospheric pressure chemical vapour deposition (APCVD). The films and powders produced were characterised by SEM, EDAX/WDX, XPS, XRD, Raman, SQUID, reflectance and absorbance measurements. The APCVD reaction of TiCl4, V(NMe2)4 and NbCl5 with fBu2Se were respectively found to be a convenient route to stable and crystalline titanium, vanadium and niobium diselenide films. The use of VCI4 and VOCI3 showed that they were both found unsuitable for producing VSe2 from the APCVD reaction with 'Bu2Se. Molybdenum and tungsten diselenide films were respectively synthesised using M0CI5 and WC16 with Et2Se. The WSe2 films produced were highly hydrophobic with contact angles for water droplets in the range of 135 - 145 . Furthermore these surfaces were highly adherent for water droplets that did not roll or slide even at a tilt angle of 90 . The deposition of tin monoselenide and tin diselenide films was achieved by the reaction of SnCU with Et2Se. The deposition temperature, flow rates and position on the substrate determined whether mixed SnSe - SnSe2, pure SnSe or pure SnSe2 thin films could be obtained. The characterisation of the films and powders formed from the APCVD or gas phase reaction of Cr02Cl2 and Et2Se confirmed the formation of an unknown solid solution of Cr2Se3_xOx. Cr2Se3-xOx adopts the hexagonal Cr2C>3 structure for a stoichiometry between Cr2C>3 and Cr2Seo.202.g, and the rhombohedral Cr2Se3 structure for a stoichiometry varying from Cr2Seo.302.7 to Cr2Se2.15O0.85- Magnetic studies showed that all the Cr2Se3.xOx compounds formed with the rhombohedral Cr2Se3 structure had an antiferromagnetic ordering with a Neel temperature lower than the expected one for Cr2Se3.
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3

Kim, Changsu. "Optical, laser spectroscopic, and electrical characterization of transition metal doped ZnSe and ZnS nano- and microcrystals." Birmingham, Ala. : University of Alabama at Birmingham, 2009. https://www.mhsl.uab.edu/dt/2009r/kim.pdf.

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Thesis (Ph. D.)--University of Alabama at Birmingham, 2009.
Title from PDF title page (viewed Feb. 3, 2010). Additional advisors: Renato Camata, Derrick Dean, Chris M. Lawson, Andrei Stanishevsky, Sergey Vyazovkin. Includes bibliographical references (p. 133-140).
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4

Gatuna, Ngigi wa. "Intrinsic vacancy chalcogenides as dilute magnetic semiconductors : theoretical investigation of transition-metal doped gallium selenide /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/10595.

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5

Luo, Ming. "Transition-metal ions in II-VI semiconductors ZnSe and ZnTe /." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4630.

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Thesis (Ph. D.)--West Virginia University, 2006.
Title from document title page. Document formatted into pages; contains xiv, 141 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 135-141).
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6

Cooke, Sharon A. "Alternative chalcogen sources for the growth of cadmium sulfide and cadmium selenide by metal organic chemical vapour deposition." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284186.

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7

Sheridan, Liam A. "Alternative cadmium source precursors for the growth of cadmium sulphide and cadmium selenide by metal-organic chemical vapour deposition." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339511.

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8

Beer, Michael P. "A study of volatile precursors for the growth of cadmium sulphide and cadmium selenide by Metal Organic Vapour Deposition." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303986.

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9

Ashraf, Shakeel. "Evolution of IR Absorber for Integration in an IR Sensitive CO2 Detector." Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-14088.

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The maximum sensitivity of a thermal IR sensor can be available either by means of the sensor material, having its own absorbing properties, or by the deposition of an additional absorber structure on the detector surface. In this thesis, the theory of two absorption structures is discussed. The first is called the interferometric absorber structure. The second structure under investigation uses a lead selenide layer for the IR absorption. In the interferometric structure, a new epoxy material SU8-2002 was used as a dielectric medium. This material has a very low thermal conductivity of 0.3 W/mK, which makes it suitable for thermal detectors. The interferometric structure is based on three layers, a 40–60 Å thick Ti layer, a SU8–2002 layer with a thickness of 2000 Å thick and a 2000Å Al layer. Using standard cleanroom processing an interferometric structure was fabricated. Transfer matrix theory was used in order to simulate the interferometric structure and the lead selenide was fabricated by means of an argon-plasma sputtering process. Both fabricated samples were characterized through Fourier transfer infrared (FTIR) spectroscopy together with a specular reflectance accessory. The thicknesses of the added layers were measured using Atomic force microscopy (AFM) for both the interferometric and lead selenide structure.  It was determined  that by changing the reflective index value of the SU8-2002 from the reported value of 1.575 to about 2.40 that this provided a better agreement with the experimental results. The absorption results for the interferometric structure were determined to be approximately 82–98% for the wavelength region of 2-20µm at 30 degree. The PbSe absorption spectra showed 30%–50% absorption for the wavelength region 2.5 – 6.67μm.
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10

Kling, Willig Fabian. "Selenium Recovery in Precious Metal Technology." Thesis, Umeå universitet, Kemiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-86735.

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Книги з теми "Metal selenide"

1

Mason, Robert P. An investigation of the influence of water quality on the mercury, methylmercury, arsenic, selenium, and cadmium concentrations in fish of representative Maryland stream: Final report. Annapolis, MD (580 Taylor Ave., Annapolis 21401): Maryland Dept. of Natural Resources, Chesapeake Bay Research and Monitoring Division, 2002.

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2

Rodway, Neil Graham. Metal-enhancement of semiconductor emission in a cadmium selenide-gold nanocomposite. 2006.

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3

Ross, Howard B. Trace Metal in the Atmosphere The Wet Deposition of Trace Metals in Sweden The Selenium Cycle. Department of Meteorology University of Stockholm Sweden, 1986.

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4

d'Arbeloff-Wilson, Sarah. Reactions of the phosphaalkyne PCBut with metal sulphides selenides and tellurides. 2000.

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5

Chemical and biological cyanide destruction and selenium removal from precious metals tailings pond water. Warrendale, PA: Minerals, Metals and Materials Society, 1990.

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6

Staid, Rashna K. Key Nutrients for Normal Brain Health. Edited by Anthony J. Bazzan and Daniel A. Monti. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190690557.003.0002.

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Over the past several decades, there has been a sharp increase in psychiatric diseases but relatively little attention to improving poor nutritional patterns that affect mental health conditions. Long-term nutrient deprivation results in neuroinflammation, which contributes to causing mental illnesses such as depression, anxiety disorder, and schizophrenia. A growing body of research substantiates the benefits of supplementing many essential nutrients such as omega-3 fatty acids, vitamin D, the B complex vitamins, vitamin E, and the minerals magnesium, iron, zinc, choline, calcium, and selenium to help prevent and treat many mental illnesses. These nutrients are often limited in the standard Western diet. Importantly, it is not just one single nutrient that is important to optimizing brain health but all the nutrients working in concert in a healthy, well-balanced approach that helps to optimize brain function and prevent disease. This chapter reviews the various nutrients involved in maintaining optimal brain health.
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7

Kang, Shin Joh. Predicting fate and transformation of oxy-anions in wastewater treatment. Water Environment Research Foundation, 2001.

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8

Division, India Mineral Economics, and Indian Bureau of Mines, eds. Status of special alloy metals in India: Cadmium, cobalt, molybdenum, nickel, niobium (columnium) & tantalum, selenium & tellurium, tin, titanium, tungsten and vandadium. Nagpur: Controller-General, Indian Bureau of Mines, 1998.

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Частини книг з теми "Metal selenide"

1

Yousefi, Ramin. "Metal-Selenide Nanostructures: Growth and Properties." In Metal Chalcogenide Nanostructures for Renewable Energy Applications, 43–81. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781119008934.ch4.

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2

Yang, Jun, and Hui Liu. "Cadmium Selenide–Platinum Nanocomposites with a Core–Shell Construction." In Metal-Based Composite Nanomaterials, 115–41. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-12220-5_5.

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3

Czerwiński, W., J. Fink, and N. Nücker. "Investigation of Undoped and Alkali-Metal Doped Poly(p-phenylene Selenide)." In Springer Series in Solid-State Sciences, 330–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-83284-0_62.

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4

Jayanand, Kishan, and Anupama B. Kaul. "Raman and Transport Characterization of Semiconducting and Superconducting Selenide-Based Transition Metal Dichalcogenides." In The Minerals, Metals & Materials Series, 121–28. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92381-5_12.

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5

Pomjakushina, Ekaterina, and Kazimierz Conder. "Chemical Aspects of the Phase Separation in Alkali Metal Intercalated Iron Selenide Superconductors." In High-Tc Copper Oxide Superconductors and Related Novel Materials, 243–52. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52675-1_20.

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6

Neal, R. H. "Selenium." In Heavy Metals in Soils, 260–83. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1344-1_12.

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7

Magos, Laszlo, and George G. Berg. "Selenium." In Biological Monitoring of Toxic Metals, 383–405. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-0961-1_16.

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8

Liu, Chen-Wei, and J. Derek Woollins. "Metal Complexes Containing P-Se Ligands." In Selenium and Tellurium Chemistry, 303–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20699-3_13.

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9

Ross, Howard B. "Biogeochemical Cycling of Atmospheric Selenium." In Metal Speciation in the Environment, 523–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-74206-4_28.

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Zambrano, Maria Clemencia, Linxi Yuan, Xuebin Yin, and Gary Bañuelos. "Element Case Studies: Selenium." In Agromining: Farming for Metals, 241–51. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61899-9_14.

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Тези доповідей конференцій з теми "Metal selenide"

1

IVANOV, D. K., N. P. OSIPOVICH, S. K. POZNYAK, and E. A. STRELTSOV. "ELECTROCHEMICAL DEPOSITION OF METAL SELENIDE CLUSTERS ON SELENIUM SURFACE." In Physics, Chemistry and Application of Nanostructures - Reviews and Short Notes to Nanomeeting 2003. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812796738_0086.

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RABCHYNSKI, S. M., D. K. IVANOU, and E. A. STRELTSOV. "PHOTOELECTROCHEMICAL PREPARATION OF METAL SELENIDE NANOPARTICLES." In Reviews and Short Notes to Nanomeeting-2005. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701947_0100.

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Oduor, Andrew O., and Robert D. Gould. "Dependence of resistivity in evaporated cadmium selenide thin films on preparation conditions and temperature." In Metal/Nonmetal Microsystems: Physics, Technology, and Applications, edited by Benedykt W. Licznerski and Andrzej Dziedzic. SPIE, 1996. http://dx.doi.org/10.1117/12.238128.

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Aleksandrova, O. A., D. S. Mazing, L. B. Matyushkin, S. F. Musikhin, A. V. Nikiforova, V. A. Moshnikov, and V. Barzda. "Synthesis of transition metal doped zinc selenide nanoparticles for bioimaging." In 2015 Photonics North. IEEE, 2015. http://dx.doi.org/10.1109/pn.2015.7292477.

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Kamada, Rui, William N. Shafarman, and Robert W. Birkmire. "Cu(In,Ga)Se2 film formation from selenization of mixed metal/metal-selenide precursors." In 2008 33rd IEEE Photovolatic Specialists Conference (PVSC). IEEE, 2008. http://dx.doi.org/10.1109/pvsc.2008.4922465.

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Makhniy, Victor P., Volodymyr V. Mel'nyk, Peter N. Gorley, Paul P. Horley, Mykhailo M. Sletov, and Zhuang Zhuo. "Detectors of UV and x-ray irradiation on the base of metal-zinc selenide contact." In ICO20:Optical Devices and Instruments, edited by James C. Wyant and Xuejun Zhang. SPIE, 2006. http://dx.doi.org/10.1117/12.666966.

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Hilal, Hikmat S., Ahed Zyoud, Khaled Murtada, Nour Nayef, Mohammed H. S. Helal, Naser Qamhieh, and AbdulRaziq HajiMohideed. "Combined electrochemical-chemical bath deposited metal selenide nano-film electrodes with high photo-electrochemical characteristics." In 2018 5th International Conference on Renewable Energy: Generation and Applications (ICREGA). IEEE, 2018. http://dx.doi.org/10.1109/icrega.2018.8337576.

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Myers, Philip D., D. Yogi Goswami, and Elias Stefanakos. "Molten Salt Spectroscopy for Quantification of Radiative Absorption in Novel Metal Chloride-Enhanced Thermal Storage Media." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-40157.

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This study describes the development and characterization of novel high-temperature thermal storage media, based on inclusion of transition metal chlorides in the potassium-sodium chloride eutectic system, (K-Na)Cl (melting temperature of 657°C, latent heat of 278 J/g). At the melting temperature of (K-Na)Cl, infrared (IR) radiation can play a major role in the overall heat transfer process — 90 percent of spectral blackbody radiation falls in the range of 2 to 13 μm. The authors propose inclusion of small amounts (less than 0.2 wt %) of IR-active transition metal chlorides to increase radiative absorption and thereby enhance heat transfer rates. A new IR reflectance apparatus was developed to allow for determination of the spectral absorption coefficient of the newly formulated PCMs in the molten state. The apparatus consisted of an alumina crucible coated at the bottom with a reflective (platinum) or absorptive (graphite) surface, a heated ceramic crucible-holder, and a combination of zinc sulfide (ZnS) and zinc selenide (ZnSe) windows for containment of the salt and allowance of inert purge gas flow. Using this apparatus, IR spectra were obtained for various transition metal chloride additives in (K-Na)Cl, and improved infrared activity and radiative transfer properties were quantified. Further, thermophysical properties relevant to thermal energy storage (i.e., melting temperature, latent heat) are measured for the pure and additive-enhanced thermal storage medium.
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Mustafa, Falah, Ali Hussein, Zainb Abdsalam, and Ali Mohssen. "Selenium metal flexible solar cell." In 2015 Sixth International Renewable Energy Congress (IREC). IEEE, 2015. http://dx.doi.org/10.1109/irec.2015.7110973.

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Mihailova, I., V. Gerbreders, E. Sledevskis, V. Kolbjonoks, and E. Tamanis. "Second harmonic generation in selenium-metal structures." In Sixth International Conference on Advanced Optical Materials and Devices, edited by Janis Spigulis, Andris Krumins, Donats Millers, Andris Sternberg, Inta Muzikante, Andris Ozols, and Maris Ozolinsh. SPIE, 2008. http://dx.doi.org/10.1117/12.815609.

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Звіти організацій з теми "Metal selenide"

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Yermiyahu, Uri, Thomas Kinraide, and Uri Mingelgrin. Role of Binding to the Root Surface and Electrostatic Attraction in the Uptake of Heavy Metal by Plants. United States Department of Agriculture, 2000. http://dx.doi.org/10.32747/2000.7586482.bard.

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The principal accomplishment of the research supported by BARD was progress toward a comprehensive view of cell-surface electrical effects (both in cell walls [CWs] and at plasma membrane [PM] surfaces) upon ion uptake, intoxication, and amelioration. The research confirmed that electrostatic models (e.g., Gouy-Chapman-Stern [G-C-S]), with parameter values contributed by us, successfully predict ion behavior at cell surfaces. Specific research objectives 1. To characterize the sorption of selected heavy metals (Cu, Zn, Pb, Cd) to the root PM in the presence of other cations and organic ligands (citric and humic acids). 2. To compute the parameters of a G-C-S model for heavy-metal sorption to the root PM. 3. To characterize the accumulation of selected heavy metals in various plant parts. 4. To determine whether model-computed ion binding or ion activities at root PM surfaces predict heavy-metal accumulation in whole roots, root tips, or plant shoots. 5. To determine whether measured ion binding by protoplast-free roots (i.e., root CWs) predicts heavy-metal accumulation in whole roots, root tips, or plant shoots. 6. To correlate growth inhibition, and other toxic responses, with the measured and computed factors mentioned above. 7. To determine whether genotypic differences in heavy-metal accumulation and toxic responses correlate with genotypic differences in parameters of the G-C-S model. Of the original objectives, all except for objective 7 were met. Work performed to meet the other objectives, and necessitated on the basis of experimental findings, took the time that would have been required to meet objective 7. In addition, work with Pb was unsuccessful due to experimental complications and work on Cd is still in progress. On the other hand, the uptake and toxicity of the anion, selenate was characterized with respect to electrostatic effects and the influences of metal cations. In addition, the project included more theoretical work, supported by experimentation, than was originally planned. This included transmembrane ion fluxes considered in terms of PM-surface electrical potentials and the influence of CWs upon ion concentrations at PM surfaces. A important feature of the biogeochemistry of trace elements in the rhizosphere is the interaction between plant-root surfaces and the ions present in the soil solution. The ions, especially the cations, of the soil solution may be accumulated in the aqueous phases of cell surfaces external to the PMs, sometimes referred to as the "water free space" and the "Donnan free space". In addition, ions may bind to the CW components or to the PM surface with variable binding strength. Accumulation at the cell surface often leads to accumulation in other plant parts with implications for the safety and quality of foods. A G-C-S model for PMs and a Donnan-plus-binding model for CWs were used successfully to compute electrical potentials, ion binding, and ion concentration at root-cell surfaces. With these electrical potentials, corresponding values for ion activities may be computed that are at least proportional to actual values also. The computed cell-surface ion activities predict and explain ion uptake, intoxication, and amelioration of intoxication much more accurately than ion activities in the bulk-phase rooting medium.
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Niu, Na, Shuying Li, and Jie Zheng. A meta-analysis of the efficacy of selenium in the treatment of Graves' disease. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, April 2021. http://dx.doi.org/10.37766/inplasy2021.4.0144.

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zhang, heng, Zhelong Liu, and Yang yang. Clinical Efficacy of Selenium Supplementation in Patients with Hashimoto's Thyroiditis: A Systematic Review and Meta-Analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2022. http://dx.doi.org/10.37766/inplasy2022.10.0085.

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Hodul, M., H. P. White, and A. Knudby. A report on water quality monitoring in Quesnel Lake, British Columbia, subsequent to the Mount Polley tailings dam spill, using optical satellite imagery. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330556.

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In the early morning on the 4th of August 2014, a tailings dam near Quesnel, BC burst, spilling approximately 25 million m3 of runoff containing heavy metal elements into nearby Quesnel Lake (Byrne et al. 2018). The runoff slurry, which included lead, arsenic, selenium, and vanadium spilled through Hazeltine Creek, scouring its banks and picking up till and forest cover on the way, and ultimately ended up in Quesnel Lake, whose water level rose by 1.5 m as a result. While the introduction of heavy metals into Quesnel Lake was of environmental concern, the additional till and forest cover scoured from the banks of Hazeltine Creek added to the lake has also been of concern to salmon spawning grounds. Immediate repercussions of the spill involved the damage of sensitive environments along the banks and on the lake bed, the closing of the seasonal salmon fishery in the lake, and a change in the microbial composition of the lake bed (Hatam et al. 2019). In addition, there appears to be a seasonal resuspension of the tailings sediment due to thermal cycling of the water and surface winds (Hamilton et al. 2020). While the water quality of Quesnel Lake continues to be monitored for the tailings sediments, primarily by members at the Quesnel River Research Centre, the sample-and-test methods of water quality testing used, while highly accurate, are expensive to undertake, and not spatially exhaustive. The use of remote sensing techniques, though not as accurate as lab testing, allows for the relatively fast creation of expansive water quality maps using sensors mounted on boats, planes, and satellites (Ritchie et al. 2003). The most common method for the remote sensing of surface water quality is through the use of a physics-based semianalytical model which simulates light passing through a water column with a given set of Inherent Optical Properties (IOPs), developed by Lee et al. (1998) and commonly referred to as a Radiative Transfer Model (RTM). The RTM forward-models a wide range of water-leaving spectral signatures based on IOPs determined by a mix of water constituents, including natural materials and pollutants. Remote sensing imagery is then used to invert the model by finding the modelled water spectrum which most closely resembles that seen in the imagery (Brando et al 2009). This project set out to develop an RTM water quality model to monitor the water quality in Quesnel Lake, allowing for the entire surface of the lake to be mapped at once, in an effort to easily determine the timing and extent of resuspension events, as well as potentially investigate greening events reported by locals. The project intended to use a combination of multispectral imagery (Landsat-8 and Sentinel-2), as well as hyperspectral imagery (DESIS), combined with field calibration/validation of the resulting models. The project began in the Autumn before the COVID pandemic, with plans to undertake a comprehensive fieldwork campaign to gather model calibration data in the summer of 2020. Since a province-wide travel shutdown and social distancing procedures made it difficult to carry out water quality surveying in a small boat, an insufficient amount of fieldwork was conducted to suit the needs of the project. Thus, the project has been put on hold, and the primary researcher has moved to a different project. This document stands as a report on all of the work conducted up to April 2021, intended largely as an instructional document for researchers who may wish to continue the work once fieldwork may freely and safely resume. This research was undertaken at the University of Ottawa, with supporting funding provided by the Earth Observations for Cumulative Effects (EO4CE) Program Work Package 10b: Site Monitoring and Remediation, Canada Centre for Remote Sensing, through the Natural Resources Canada Research Affiliate Program (RAP).
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