Bibliografie tematiche / Selenites

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Letteratura scientifica selezionata sul tema "Selenites"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 5 marzo 2023

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Articoli di riviste sul tema "Selenites"

1

Eisenberg, Sylvan. "Relative Stability of Selenites and Selenates in Feed Premixes as a Function of Water Activity". Journal of AOAC INTERNATIONAL 90, n. 2 (1 marzo 2007): 349–53. http://dx.doi.org/10.1093/jaoac/90.2.349.

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Abstract Sodium selenite is more hygroscopic than sodium selenate. It is, therefore, more likely to dissolve when dispersed in feeds of relatively high water activity. When dissolved, it may form selenious acid and disperse as a vapor. This is easily demonstrated by mounting a filter paper wetted with a reagent such as ascorbic acid over the subject feed, but not in contact with it. The paper turns brown as elemental selenium is formed from reduction of the vapor. Analysis of the paper ensures that the brown is indeed selenium. Though premixes are generally low enough in moisture content to ensure stability of the selenites, this is not true of many feeds. The water activities of a number of feeds, feed premixes, and feed ingredients have been determined instrumentally and compared to those of saturated solutions of sodium selenite and sodium selenate. There is no question that the selenite often dissolves with the potential to react and, in so doing, loses its nutritional function.
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2

Frost, Ray L., B. Jagannadha Reddy e Marilla J. Dickfos. "An Application of near Infrared and Mid-Infrared Spectroscopy to the Study of Uranyl Selenite Minerals: Derriksite, Demesmaekerite, Guilleminite and Haynesite". Journal of Near Infrared Spectroscopy 16, n. 5 (1 gennaio 2008): 455–69. http://dx.doi.org/10.1255/jnirs.813.

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The near infrared (NIR) spectra of the natural uranyl selenite minerals that include derriksite, demesmaekerite, guilleminite and haynesite are examined as a potential indicator of uranium occurring geologic materials at the earth's surface. NIR analysis, complimented with mid-IR studies, was used to investigate the co-ordination of UO22+ and Cu2+ in the uranyl selenites. Bands obtained from the infrared spectra of selenites are interpreted in terms of the stretching vibrations of uranyl, selenite units and OH groups and bending modes. NIR spectra of the uranyl selenite minerals exhibit distinctive characteristics of uranyl ion (UO2)2+ absorptions over the range of 11,500–8000 cm−1. The high- range NIR spectrum of Cu-bearing uranyl derriksite is resolved into two bands, UO22+ 8070 cm−1 and Cu2+ 7175 cm−1. The effect of lead in demesmaekerite leads to distortion of the spectrum and the NIR bands are observed for uranyl ion at 11,305 cm−1 and 8475 cm−1 and for Cu2+ at 7430 cm−1. The δ U–OH bending vibrations are characterised by a strong absorption feature centred at 1015 cm−1 in haynesite. A significant shift for UOH bending vibrations and the absence of ν1 and ν3 vibrations of UO22+ at the expense of Cu2+ are reflected in the spectrum of derriksite. The complexity of bands with shifts to low wavenumbers could take place due to the additional cations of Pb and Cu in the structure of demesmaekerite. NIR spectroscopy has proven to be a most useful tool for the identification of and distinction between different uranyl selenite minerals.
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3

Gospodinov, G. G., e M. G. Stancheva. "Formation and thermal stability of selenites and hydrogen selenites of samarium". Journal of Thermal Analysis and Calorimetry 78, n. 3 (gennaio 2004): 1057–63. http://dx.doi.org/10.1007/s10973-005-0470-0.

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4

Mička, Zdeněk, e Miroslav Ebert. "The change in the standard Gibbs energy during the formation of the acid selenites of the alkali metals". Collection of Czechoslovak Chemical Communications 51, n. 9 (1986): 1933–41. http://dx.doi.org/10.1135/cccc19861933.

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The heterogeneous M2SeO3-H2SeO3-H2O systems (M = Li, Na, K, Rb, Cs) were studied at 298 K using the Filippov eutonic method, yielding the values of the change in the standard Gibbs energy of reactions leading to the formation of the acid selenites of these metals. It follows from the ΔG0 values that the stability of hydrogenselenites and trihydrogenbis(selenites) increases from lithium to cesium and also, except for cesium salts, on transition from MHSeO3 to MH3(SeO3)2.
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5

Kovrugin, Vadim M., Marie Colmont, Oleg I. Siidra, Dmitry O. Charkin, Almaz Aliev, Sergey V. Krivovichev e Olivier Mentré. "Synthesis and structural variety of first Mn and Bi selenites and selenite chlorides". Zeitschrift für Kristallographie - Crystalline Materials 234, n. 3 (26 marzo 2019): 141–53. http://dx.doi.org/10.1515/zkri-2018-2088.

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AbstractSingle crystals of new Mn2[Bi2O](SeO3)4(I), MnBi(SeO3)2Cl (II), MnIIMnIII(SeO3)2Cl (III), Mn5(SeO3)2Cl6(IV), and Mn4(Mn5,Bi)(SeO3)8Cl5(V) have been synthesized by chemical vapour transport and hydrothermal methods. They have been structurally characterized by single crystal X-ray diffraction analysis. The compoundsII–Vare the first Mn selenite chlorides, while theI,IIandVcompounds are the first Bi-containing Mn oxoselenites. Structural relationships of the new phases with other compounds are discussed. An overview of the mixed-ligand MnOmClnpolyhedra in inorganic compounds is given.
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6

Gospodinov, G. G., e M. G. Stancheva. "Physicochemical study on gadolinium selenites". Journal of Thermal Analysis and Calorimetry 78, n. 1 (2004): 323–29. http://dx.doi.org/10.1023/b:jtan.0000042178.46044.d1.

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7

Cao, Xue-Li, Fang Kong, Zhang-Zhen He e Jiang-Gao Mao. "Structural and magnetic studies on three new mixed metal copper(ii) selenites and tellurites". Dalton Transactions 44, n. 25 (2015): 11420–28. http://dx.doi.org/10.1039/c5dt01257k.

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8

Jia, Ying-Jie, Yi-Gang Chen, Xiao-Ni Yao e Xian-Ming Zhang. "Alkali earth MOx (x = 6, 7, 9, 12) polyhedra tuned cadmium selenites with different dimensions and diverse SeO32− coordinations". CrystEngComm 19, n. 44 (2017): 6644–50. http://dx.doi.org/10.1039/c7ce01461a.

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9

Ji, Xiao-Xu, Qing-Huai Zhao, Hao Chen, Xin-Wei Luo, Yi Shang e Xiao-Di Liu. "Facile Synthesis of Hierarchical CoSeO3‧2H2O Nanoflowers Assembled by Nanosheets as a Novel Anode Material for High-Performance Lithium-Ion Batteries". Nanomaterials 12, n. 14 (19 luglio 2022): 2474. http://dx.doi.org/10.3390/nano12142474.

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As novel anodic materials for lithium-ion batteries (LIBs), transitional metal selenites can transform into metal oxide/selenide heterostructures in the first cycle, which helps to enhance the Li+ storage performance, especially in terms of high discharge capacity. Herein, well-defined hierarchical CoSeO3‧2H2O nanoflowers assembled using 10 nm-thick nanosheets are successfully synthesized via a facile one-step hydrothermal method. When used as anodic materials for LIBs, the CoSeO3‧2H2O nanoflowers exhibit a considerably high discharge capacity of 1064.1 mAh g−1 at a current density of 0.1 A g−1. In addition, the obtained anode possesses good rate capability and cycling stability. Owing to the superior electrochemical properties, the CoSeO3‧2H2O nanoflowers would serve as promising anodic materials for high-performance LIBs.
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10

Qian, Qian, Fang Kong e Jiang-Gao Mao. "A series of new silver selenites with d0-TM cations". RSC Advances 6, n. 83 (2016): 79681–87. http://dx.doi.org/10.1039/c6ra17867g.

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Più fonti

Tesi sul tema "Selenites"

1

Morris, R. E. "Synthesis and characterization of metal phosphites and selenites". Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314881.

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2

Huang, Donglin. "Heterogeneous reduction of selenite by zero valent iron-steel wool". Morgantown, W. Va. : [West Virginia University Libraries], 2010. http://hdl.handle.net/10450/11233.

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Thesis (Ph. D.)--West Virginia University, 2010.
Title from document title page. Document formatted into pages; contains ix, 106 p. : ill. (some col.). Includes abstract. Includes bibliographical references.
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3

Wang, Zaiqi. "Lens calcium homeostasis and selenite cataract". Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042006-164509/.

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4

Tan, Thatt Yang Timothy School of Chemical Engineering &amp Industrial Chemistry UNSW. "Photocatalytic reduction of selenate and selenite : water/wastewater treatment and the formation of nano-selenium compounds". Awarded by:University of New South Wales. School of Chemical Engineering and Industrial Chemistry, 2003. http://handle.unsw.edu.au/1959.4/20448.

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The current work investigates the photocatalytic reduction of selenium (Se) ions, selenate Se(VI) and selenite Se(IV), from two perspectives: Se ion removal from water and wastewater and the formation of nano-Se compounds. Se ion pollution has become an environmental issue in recent years, and hence there is an urgent need for an efficient removal technique. In addition, there is increasing interest in the formation of nano-size semiconductors for niche applications. Since Se is a semiconductor, its formation onto the semiconductor TiO2 could lead to the discovery of new composite materials. The current study has successfully elucidated the mechanism of Se ions reduction by photocatalysis. Factors such as the simultaneous adsorption of the Se ions (the electron scavenger in this case) and a suitable organic compound (the hole scavenger), and the chemical properties of the hole scavenger were crucial for effective and efficient Se ions photoreduction. Optimum conditions in relation to pH, concentrations and types of hole scavenger were reported and discussed. It was also found that stoichiometric adsorption ratio of formate and selenate resulted to optimum photoreduction rate. A modified Langmuir-Hinshelwood kinetic model that considered the simultaneous adsorption of both solutes was derived. The current investigation has also seen the successful formation Se deposits of different morphologies onto the TiO2 particles. Discrete Se particles of various sizes in the nano-size range as well as a Se film were deposited onto the TiO2 particles under different initial experimental conditions. The Se-TiO2 composite semiconductor was explored for the removal of cadmium Cd2+ ions, which resulted in the formation of CdSe-TiO2 systems. The photoreduction of Se ions using silver-modified TiO2 showed the enhanced reduction of Se ions to Se2- in the form of H2Se gas. It is suggested that the H2Se gas generated from the current photoreduction process could be used as a safer and cheaper technique in the formation of Se-compounds such copper selenide, cadmium selenide and zinc selenide. All these compounds were widely used in optical and semiconducting devices.
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5

LAFRONT, ANNE-MARIE. "Selenites de metaux de transition 3d de dimensionnalite variee : synthese, caracterisation et etude magneto-structurale". Toulouse 3, 1995. http://www.theses.fr/1995TOU30156.

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Cette recherche concerne la synthese, le comportement thermique et l'etude magneto-structurale des selenites des elements de transition 3d. Les structures ainsi etudiees peuvent varier de la tridimensionnalite au systeme discret. Deux diselenites de fer(iii) et de chrome(iii), m#2(se#2o#5)#3, presentant un caractere tridimensionnel et un faible couplage antiferromagnetique ont ete prepares. Quatre nouveaux complexes: cu(hseo#3)#2(h#2o)#2 ; cu(hseo#3)#2(no#3)#2#2#-,2nh#4+,nh#4no#3 ; cu(hseo#3)#2cl#-,nh#4+ et cu(hseo#3)#2cu#xm(#1#-#x)cl#2(h#2o)#4 ont ete isoles. Ils ont une structure en couche derivant de celle du compose hote cu(hseo#3)#2, mais l'ecartement entre les feuillets est variable suivant le complexe. De plus, tous ces nouveaux complexes presentent une transition magnetique a basse temperature (ferromagnetisme faible ou metamagnetisme). L'introduction d'un ligand supplementaire, la 2,2'-bipyridine, reduit encore la dimensionnalite de ces systemes ; chaines (1d): cu(se#2o#5)(c#1#0h#8n#2),2h#2o et m(hseo#3)#2(c#1#0h#8n#2), ou zero-d: dimere cu(hseo#3)#2(c#1#0h#8n#2)#2 ou monomere cu(hseo#3)cl(h#2seo#3)(c#1#0h#8n#2)
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Becker, Richard. "Terminating species and Lewis acid-base preference in oxohalides : a new route to low-dimensional compounds /". Doctoral thesis, Stockholm : Department of Inorganic Chemistry, Stockholm University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1414.

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7

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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8

Barboza, Eliza [UNESP]. "Biofortificação agronômica com selênio em cultivares de repolho". Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154224.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo deste trabalho foi avaliar concentrações de selênio (selenato e selenito de sódio) no crescimento, produção e biofortificação de duas cultivares de repolho. Para isso foram realizados dois experimentos em casa de vegetação, em sistema hidropônico, no período de julho a novembro de 2014, na UNESP, campus Jaboticabal-SP. Os experimentos diferiram conforme a fonte de selênio (Se) utilizada (selenato e selenito de sódio). Em ambos os experimentos, avaliaram-se dois fatores, sendo: duas cultivares de repolho (‘Fênix’ e 'Red Dinasty’) e cinco concentrações de Se (0, 5, 15, 30 e 60 µmol L-1) na solução nutritiva. O delineamento experimental utilizado foi o de blocos casualizados, com esquema fatorial 2 x 5 e quatro repetições. As variáveis analisadas foram o teor e acúmulo de Se na raiz e cabeça de repolho, área, diâmetro, comprimento e densidade de raiz, produtividade de repolho, massa seca de raiz, caule e cabeça de repolho e o teor e acúmulo de nitrogênio, fósforo e enxofre na cabeça de repolho. As fontes selenato e selenito promoveram o crescimento das raízes de repolho devido aos aumentos verificados em área, diâmetro, comprimento e densidade de raiz, em baixas concentrações de Se aplicadas. O aumento da produção de massa seca de raiz provavelmente foi devido o maior crescimento da raiz, que foi influenciado pelo fornecimento de Se. A massa seca do caule foi diferente apenas entre as cultivares de repolho com aplicação de selenato ou selenito. O teor de nitrogênio apresentou diferenças apenas entre as cultivares quando utilizada a fonte selenito. Ambas as fontes de Se também proporcionaram aumentos na absorção de fósforo e enxofre quando baixas concentrações de Se foram fornecidas. Observou-se que a aplicação de até 16,77 e 7,54 µmol L-1 de Se com as fontes selenato e selenito, respectivamente, proporcionaram os maiores incrementos na produtividade do repolho, e mesmo com a redução da produtividade com concentrações acima destas, os valores foram maiores que o tratamento controle. Isso indica que o Se foi benéfico ao repolho, pois não reduziu a sua produção. Verificou-se que a biofortificação foi eficiente para ambas as cultivares de repolho, que absorveram e acumularam Se na cabeça de repolho em função do incremento de Se, tanto com selenato como selenito.
The objective of this research was to evaluate concentrations of selenium (sodium selenate and selenite) in the growth, production and biofortification of two cabbage cultivars. Two experiments were carried out in greenhouse under hydroponic system, from July to November, 2014, at UNESP, Jaboticabal-SP campus. The experiments differed according to the source of selenium (Se) used (sodium selenate and selenite). In both experiments two factors were evaluated: two cabbage cultivars ('Fênix' and 'Red Dinasty') and five concentrations of Se (0, 5, 15, 30 and 60 μmol L-1) in the nutrient solution. The experimental was a randomized block design, with 2 x 5 factorial and four replications. The variables analyzed were the content and accumulation of Se in the root and shoot cabbage, evaluating area, diameter, length, density and dry mass in the root, cabbage yield, stem and cabbage head, and the content accumulation of nitrogen, phosphorus and sulfur in the cabbage shoot. Selenate and selenite sources promoted the growth of cabbage roots due to increases in area, diameter, length and root density at low concentrations of Se applied. The increase in root dry mass production was probably due to higher root growth, which was influenced by the supply of Se. The dry mass of the stem was different only between the cabbage cultivars with application of selenate or selenite. The nitrogen content presented differences only among the cultivars when the selenite source was used. Both S sources also provided increases in phosphorus and sulfur absorption when low concentrations of if were provided. It was observed that the application of up to 16,77 and 7,54 μmol L-1 of Se with selenate and selenite sources, respectively, provided the greatest increases in cabbage yield, and even with the reduction of productivity with concentrations above these, the values were higher than the control treatment. These indicate that the Se was beneficial to the cabbage, since it did not reduce its production. It was verified that biofortification was efficient for both cabbage cultivars, which absorbed and accumulated Se in the cabbage head as a function of the increase of Se, with both selenate and selenite.
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Bernotienė, Gailevičiūtė Rasa. "Kadmio, cinko ir selenito jonų ūmus poveikis baltymų sintezės sistemai laboratorinių pelių kepenyse". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100909_133626-77877.

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Kadmis yra plačiai paplitęs aplinkos teršalas. Šis sunkusis metalas yra pavojingas žmonių sveikatai. Tuo tarpu cinkas ir selenas yra būtini elementai žmonėms ir gyvūnams. Todėl šio darbo tikslas buvo įvertinti kadmio, cinko ir selenito jonų ūmų poveikį baltymų sintezės sistemos ir jos komponentų bei ląstelių antioksidacinės sistemos aktyvumams laboratorinių pelių kepenyse. Tikslui pasiekti iškelti šie uždaviniai: įvertinti ūmų kadmio jonų poveikį baltymų sintezės sistemai pelių kepenyse, transliacijos sistemos komponentų – tRNR bei aminoacil-tRNR sintetazės – aktyvumams, metalotioneino koncentracijai pelių kepenyse, redukuoto glutationo koncentracijai ir lipidų peroksidacijai pelių kepenyse bei eritrocituose ir įvertinti cinko ir selenito jonų įtaką pelių baltymų sintezės ir antioksidacinėms sistemoms, esant ūmiam kadmio jonų poveikiui. Tyrimo rezultatai parodė, kad kadmio jonų poveikis baltymų sintezės procesui pelių kepenyse susijęs su tiesioginiu poveikiu šiame procese dalyvaujančių komponentų – tRNR bei aminoacil-tRNR sintetazės – aktyvumų pokyčiais. Be to, kadmio jonai keitė ląstelių antioksidacinės sistemos komponentų (redukuoto glutationo ir metalotioneino) koncentracijas ir aktyvino lipidų peroksidaciją pelių kepenyse. Cinko ir selenito jonai apsaugojo transliacijos ir antioksidacinę sistemas nuo toksinio kadmio jonų poveikio.
Cadmium is a widespread environmental pollutant. This heavy metal forms a serious hazard to the public health. Zinc and selenium are essential elements for humans and animals. So, the aim of present study was to evaluate the acute effects of cadmium, zinc, and selenite ions on the effectiveness of protein synthesis system and its components in the liver of laboratory mice as well as on the activity of cellular antioxidant system. The objectives of the study were to evaluate the effects of cadmium ions on the rate of liver protein synthesis, on the activities of components of translation machinery – tRNA and aminoacyl-tRNA synthetase, on the content of metallothionein in the liver, on the content of reduced glutathione and lipid peroxidation in the liver and red blood cells; to evaluate the influence of zinc and selenite ions on the protein synthesis system and antioxidative system of mice affected by cadmium ions. The obtained results showed, that the toxicity of cadmium ions on hepatic protein synthesis is related to the changes in activities of the key components of protein synthesizing system – tRNAs and aminoacyl-tRNA synthetases. Moreover, cadmium ions altered the content of antioxidant components (reduced glutathione, metallothionein) and activated liver lipid peroxidation. Mice pre-treatment with zinc and selenite ions prevented both translational machinery and antioxidative system against cadmium-induced disturbances.
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Ferreira, Raphael Leone da Cruz [UNESP]. "Biofortificação e toxicidade de selênio na cultura da alface em solução nutritiva". Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/144363.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
As informações sobre fontes de selênio (Se) em alface são incipientes na literatura, sobretudo, com relação ao limite entre biofortificação e toxicidade. Assim, o objetivo deste estudo foi determinar níveis críticos de Se na solução nutritiva e foliar, e a melhor fonte que aumente a biofortificação da alface hidropônica sem causar toxicidade. O delineamento experimental utilizado foi inteiramente casualizado representado por duas fontes de selênio, selenito de sódio (Na2SeO3) e selenato de sódio (Na2SeO4), dez concentrações de selênio (0; 2; 4; 6; 8; 16; 32; 64; 96; 128 μM) com quatro repetições por tratamento, totalizando 80 unidades experimentais. As concentrações adequadas estão entre 5,6 e 16 μM de selênio na forma selenato em solução nutritiva e teores foliares adequados de 10,2 a 41,8 mg kg-1 de selênio.
Information on sources of selenium (Se) in lettuce are scarce in the literature, especially with respect to the boundary between Biofortification and toxicity. The objective of this study was to determine critical levels of Se in the nutrient solution and leaf and the best source to increase biofortification of hydroponic lettuce without causing toxicity. The experimental design was completely randomized represented by two sources of selenium, sodium selenite (Na2SeO3) and sodium selenate (Na2SeO4) ten selenium concentrations (0. 2. 4. 6. 8. 16. 32. 64. 96. 128 M) with four replicates per treatment, totaling 80 experimental units. The concentrations are between 5.6 and 16 M selenium selenate form the nutrient solution and appropriate foliar 10.2 to 41.8 mg kg-1 of selenium.
CNPq: 132361/20159
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Libri sul tema "Selenites"

1

R, Masson M., Lutz H. D e Engelen B, a cura di. Sulfites, selenites and tellurites. Oxford: Pergamon, 1986.

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2

Ilaria, Cornia, a cura di. Bologna di selenite: Una pietra racconta. Bologna: Costa editore, 2002.

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il lapis specularis nel mondo romano dall'estrazione all'uso (Conference) (2013 Museo civico di scienze naturali di Faenza) Vetro di pietra. Il vetro di pietra: Il lapis specularis nel mondo romano dall'estrazione all'uso : atti del Convegno internazionale, Museo civico di scienze naturali di Faenza, 26-27 settembre 2013. Faenza (Ra): Carta Bianca editore, 2015.

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Eisenmann, B., e H. Schäfer. Sulfides, Selenides, Tellurides (Part 1). A cura di K. H. Hellwege e A. M. Hellwege. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/b19991.

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Hellwege, K. H., e A. M. Hellwege, a cura di. Sulfides, Selenides, Tellurides (Part 2). Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/b32266.

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Truong, Yen Thi Hoang. Reduction of selenite under controlled conditions. Sudbury, Ont: Laurentian University, School of Graduate Studies, 2005.

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"Samay Pata": Al rescate de los selenitas. Cochabamba: Grupo Editorial Kipus, 2012.

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Oči u oči sa Selenićem. Beograd: "D'87", 1991.

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K, Morozova N., e Institut kristallografii im. A.V. Shubnikova., a cura di. Selenid t͡s︡inka: Poluchenie i opticheskie svoĭstva. Moskva: "Nauka", 1992.

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Olivas, Bego. Relats d'una selenita: (en La menor). [Barcelona]: Lapislàtzuli Editorial, 2014.

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Più fonti

Capitoli di libri sul tema "Selenites"

1

Towl, A. D. C. "With Selenides Giving Hydrogen Selenide". In Inorganic Reactions and Methods, 176. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145159.ch116.

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Kong, Fang, Chuan-Fu Sun, Bing-Ping Yang e Jiang-Gao Mao. "Second-Order Nonlinear Optical Materials Based on Metal Iodates, Selenites, and Tellurites". In Structure-Property Relationships in Non-Linear Optical Crystals I, 43–103. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/430_2011_65.

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Waitkins, G. R., R. Shutt, Irvin W. Kinney e James P. McReynolds. "Aluminum Selenide and Hydrogen Selenide". In Inorganic Syntheses, 183–86. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132333.ch55.

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Eisenmann, B., e H. Schäfer. "1 Introduction". In Sulfides, Selenides, Tellurides (Part 2), A1—A5. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/10338439_1.

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Eisenmann, B., e H. Schäfer. "GaMnS - GaSeTl". In Sulfides, Selenides, Tellurides (Part 2), 76–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/10338439_10.

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Eisenmann, B., e H. Schäfer. "GaSeYb - GeMnS". In Sulfides, Selenides, Tellurides (Part 2), 90–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/10338439_11.

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Eisenmann, B., e H. Schäfer. "GeMnSSm - GeSnTe". In Sulfides, Selenides, Tellurides (Part 2), 106–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/10338439_12.

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Eisenmann, B., e H. Schäfer. "GeSnTe - HoPrS". In Sulfides, Selenides, Tellurides (Part 2), 120–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/10338439_13.

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Eisenmann, B., e H. Schäfer. "HoS - InPbTe". In Sulfides, Selenides, Tellurides (Part 2), 136–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/10338439_14.

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Eisenmann, B., e H. Schäfer. "InPrS - InSeTe". In Sulfides, Selenides, Tellurides (Part 2), 150–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/10338439_15.

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Atti di convegni sul tema "Selenites"

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DAI, ZHIMIN, ZHAN SHI, GUANGHUA LI, DONG ZHANG, WENSHENG FU e SHOUHUA FENG. "HYDROTHERMAL SYNTHESES AND STRUCTURAL DIVERSITY OF A FAMILY OF INORGANIC-ORGANIC HYBRID VANADIUM SELENITES". In Proceedings of the Seventh International Symposium on Hydrothermal Reactions. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812705228_0044.

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Walker, Bryce, e Rakesh Agrawal. "Grain growth enhancement of selenide CIGSe nanoparticles to densified films using copper selenides". In 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC). IEEE, 2012. http://dx.doi.org/10.1109/pvsc.2012.6318141.

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WANG, Kaifeng, Alejandro Fernandez-Martinez, Bin MA, Laurent Charlet, Benoit MADE, Pierre Henocq e Laura Simonelli. "Selenite interactions with iron sulfides". In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6201.

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Seregina, I. I., e I. G. Makarskaya. "Photosynthetic activity of spring wheat depending on the conditions of water supply". In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-120.

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Abstract:In model experiments in soil culture, the effect of different methods of treatment with sodium selenite on the photosynthetic activity of spring wheat variety Zlata was studied under extreme growing conditions. Under drought conditions, the inhibition of the growth of the photosynthetic surface of spring wheat plants was revealed. Under conditions of excessive water supply, a sharp decrease in the area of the assimilating surface of wheat plants was observed. The positive effect of sodium selenite solution on the photosynthetic activity of spring wheat plants was established with insufficient and excessive water supply to wheat plants.
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Hopkins, Michael Adventure, Neal Kuperman, James Barnes e Raj Solanki. "Magnetic Characterization of Cobalt Selenide and Nickel Selenide Thin Films". In 2018 IEEE 13th Nanotechnology Materials and Devices Conference (NMDC). IEEE, 2018. http://dx.doi.org/10.1109/nmdc.2018.8605836.

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Schardt, C. R., J. H. Simmons, L. LeNeindre, P. Lucas e J. Lucas. "Nonlinear Index of refraction of germanium selenide glass at 10.6 μm". In Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/bgppf.1997.jsue.32.

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We report on the nonlinear index of refraction in germanium selenide glasses at the CO2 laser wavelength of 10.6 μm. This frequency is near the low frequency edge of the germanium selenide infrared window. The nonlinear index is measured by the z-scan technique probed with a CO2 laser. The measurements were done with the laser operating in both continuous and pulsed modes. Compositions of germanium selenide glasses varying from 2 to 40 at. % germanium are studied and the data is compared to the structure and infrared spectra of these glasses.
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Tugarova, A. V., P. V. Mamchenkova e A. A. Kamnev. "Metabolic transformation of selenium (IV) by bacteria of the genus Azospirillum". In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.260.

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Possible mechanisms of selenite reduction by bacteria of the genus Azospirillum are studied. A method is proposed for producing extracellular Se nanoparticles homogeneous by size which have been characterised by various methods.
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Oh, Thomas I. "Broadband AR coatings on zinc selenide substrates using ion-assisted deposition". In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.tuh5.

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A series of five broadband antireflection coatings on zinc selenide substrates was deposited with or without ion-assisted deposition at a substrate temperature of 220°C. Measurement of laser damage threshold for 10.6-µm, 0.1-µs pulses were made on these coatings. Significant improvements have been made in increasing the durability and laser damage threshold of broadband AR coatings by using the ion-assisted deposition of the zinc selenide films. Coatings prepared using this technique consistently passed the environmental tests for adhesion, 24-h salt spray, and 10-day humidity tests specified by MIL-C-675 and MIL-M-13508. The experimental data indicate that the damage threshold can be increased by using the ion-assisted deposition and by optimizing deposition parameters such as temperature and pressure. The absorption was normally reduced by baking the coatings at the temperature of 300°C in air. Baking increased the damage thresholds of some coatings, especially those which initially had noticeably large absorption. Using the ion-assisted deposition, the zinc selenide films were strengthened by increasing packing density and reducing columnar microstructure. Therefore, it is concluded that the ion-assisted deposition of zinc selenide films definitely increases the laser damage threshold of broadband AR coatings on zinc selenide substrates.
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Frantz, Jesse A., Jason D. Myers, Robel Y. Bekele, Anthony Clabeau, Vinh Q. Nguyen, Collin C. McClain, Natalia Litchinitser e Jasbinder S. Sanghera. "Arsenic selenide dielectric metasurfaces". In Optical Components and Materials XVI, a cura di Michel J. Digonnet e Shibin Jiang. SPIE, 2019. http://dx.doi.org/10.1117/12.2507894.

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Nechaeva, M. V., e I. F. Golovatskaya. "The effect of sodium selenite on the secondary metabolism of cell culture Lychnis chalcedonica in vitro". In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.181.

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Abstract (sommario):
We studied the effect of sodium selenite (Se) on the secondary metabolism of Lychnis chalcedonica L. cell culture in vitro. It was found that low concentrations of Se reduce the flavonoid content, but do not change the content of saponins.
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Rapporti di organizzazioni sul tema "Selenites"

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Rasmussen, Anya Marie. Pressure-induced phase transitions of indium selenide. Office of Scientific and Technical Information (OSTI), maggio 2016. http://dx.doi.org/10.2172/1469335.

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Doyle, Kevin, e Sudhir Trivedi. Dislocation Etching Solutions for Mercury Cadmium Selenide. Fort Belvoir, VA: Defense Technical Information Center, settembre 2014. http://dx.doi.org/10.21236/ada609573.

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Harrison, W. T., G. D. Stucky, R. E. Morris e A. K. Cheetham. The Synthesis and Crystal Structure of Aluminum Selenite Trihydrate, Al2(seO3)3.32O. Fort Belvoir, VA: Defense Technical Information Center, maggio 1992. http://dx.doi.org/10.21236/ada251283.

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Berry, Patrick A. Versatile Chromium-Doped Zinc Selenide Infrared Laser Sources. Fort Belvoir, VA: Defense Technical Information Center, maggio 2010. http://dx.doi.org/10.21236/ada526209.

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Munavalli, Shekar, David I. Rossman, Dennis K. Rohrbaugh, C. P. Ferguson e C. Parker Ferguson. Synthesis of Bis-(Trifluoromethyl) Trisulfide and Bis- (Trifluoromethylthio) Selenide. Fort Belvoir, VA: Defense Technical Information Center, giugno 1992. http://dx.doi.org/10.21236/ada254143.

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Nakotte, Tom. Engineering of Lead Selenide Quantum Dot Based Devices and Core/Shell Heterostructures. Office of Scientific and Technical Information (OSTI), aprile 2020. http://dx.doi.org/10.2172/1614831.

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Katzman, Daniel B. Design and Optimization of Copper Indium Gallium Selenide Thin Film Solar Cells. Fort Belvoir, VA: Defense Technical Information Center, settembre 2015. http://dx.doi.org/10.21236/ad1009063.

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Afrin, Shakila. Investigation of Electronic and Optical Properties of 2-Dimensional Semiconductor Tin Selenide (SnSe) Thin Films. Portland State University Library, gennaio 2000. http://dx.doi.org/10.15760/etd.6738.

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Balapanov, M. Kh, K. A. Kuterbekov, M. M. Kubenova, R. Kh Ishembetov, B. M. Akhmetgaliev e R. A. Yakshibaev. Effect of lithium doping on electrophysical and diffusion proper-ties of nonstoichiometric superionic copper selenide Cu1.75Se. Phycal-Technical Society of Kazakhstan, dicembre 2017. http://dx.doi.org/10.29317/ejpfm.2017010203.

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Roscoe, S. M., S. B. Green e S. S. Gandhi. Uranium, Gold and Selenide minerals Locally Concentrated in Drift At "Twin Lakes" near Bathurst Inlet, Northwest Territories. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/120628.

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