Selenium
... forms two oxides: selenium dioxide (SeO2) and selenium trioxide (SeO3). Selenium dioxide is formed by combustion of ... Certain soils are selenium-rich, and selenium can be bioconcentrated by some plants. In soils, selenium most often occurs in ... named like selenium for the moon well before the discovery of selenium. Selenium is most commonly found as an impurity, ... require selenium, and their growth indicates the presence of selenium in soil). Selenium is a component of the unusual amino ...
Selenium tetrachloride
When the reacting selenium is heated, the product sublimes from the reaction flask. The volatility of selenium tetrachloride ... It is one of two commonly available selenium chlorides, the other example being selenium monochloride, Se2Cl2. SeCl4 is used in ... 4 HCl Upon treatment with selenium dioxide, it gives selenium oxychloride:[page needed] SeCl4 + SeO2 → 2SeOCl2 Lide, David R. ( ... Selenium(IV) compounds, Chlorides, Nonmetal halides, Chalcohalides, Selenium halides). ...
Selenium rectifier
... s have no warm-up time, unlike high-vacuum rectifiers. Selenium rectifiers were also cheaper and simpler to ... A much thicker layer of selenium (50 to 60 μm) doped with a halogen is deposited on top of the thin metal plating. The selenium ... Selenium rectifiers have an operating temperature limit of 130 °C and are not suitable for high-frequency circuits. Selenium ... F.T. Selenium Rectifier Handbook; 2nd Ed; Federal Telephone and Radio; 80 pages; 1953. (archive) S.T. Selenium Rectifier ...
Selenium yeast
Total selenium in selenium yeast can be reliably determined using open acid digestion to extract selenium from the yeast matrix ... Because selenium-enriched foods contain much more selenium than natural foods, selenium toxicity is a potential problem, and ... Selenium yeast is a feed additive for livestock, used to increase the selenium content in their fodder. It is a form of ... An organic selenium-containing chemical found in selenium yeast has been shown to differ in bioavailability and metabolism ...
Selenium hexafluoride
Langner, B. E. "Selenium and Selenium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi: ... Selenium(VI) compounds, Hexafluorides, Octahedral compounds, Chalcohalides, Selenium halides, Foul-smelling chemicals). ... Selenium hexafluoride is the inorganic compound with the formula SeF6. It is a very toxic colourless gas described as having a ... In the U.S., OSHA and ACGIH standards for selenium hexafluoride exposure is an upper limit of 0.05 ppm in air averaged over an ...
Selenium-79
Selenium-80 and selenium-82 have higher fission yields, about 20 times the yield of 79Se in the case of uranium-235, 6 times in ... Selenium-79 is a radioisotope of selenium present in spent nuclear fuel and the wastes resulting from reprocessing this fuel. ... Moreover, selenium is an essential micronutrient as it is present in the catalytic centers in the glutathione peroxidase, an ... Isotopes of selenium ANL factsheet Journal of Analytical Atomic Spectrometry (CS1 maint: archived copy as title, Articles with ...
Selenium sulfide
... can refer to either of the following: Selenium disulfide, SeS2 Selenium hexasulfide, Se2S6 This set index ...
Selenium compounds
Selenium forms two oxides: selenium dioxide (SeO2) and selenium trioxide (SeO3). Selenium dioxide is formed by the reaction of ... Some of the selenium oxyhalides, such as selenium oxyfluoride (SeOF2) and selenium oxychloride (SeOCl2) have been used as ... It is prepared by treating selenium with sulfuryl chloride (SO2Cl2). Selenium reacts with fluorine to form selenium ... Iodides of selenium are not well known. The only stable chloride is selenium monochloride (Se2Cl2), which might be better known ...
Selenium oxydichloride
... can be prepared by several methods, and a common one involves the conversion of selenium dioxide to ... Selenium oxybromide SeOBr2 Selenous acid H2SeO3 "Selenium compounds (as Se)". Immediately Dangerous to Life or Health ... H2O The original synthesis involved the redistribution reaction of selenium dioxide and selenium tetrachloride. The compound ... Selenium oxydichloride is the inorganic compound with the formula SeOCl2. It is a colorless liquid. With a high dielectric ...
Selenium acid
... may refer to either of the following: Selenious acid, H2SeO3 Selenic acid, H2SeO4 Hydroselenic acid, H2Se This ... disambiguation page lists articles associated with the title Selenium acid. If an internal link led you here, you may wish to ...
Selenium trioxide
Se2O5 It reacts with selenium tetrafluoride to form selenoyl fluoride, the selenium analogue of sulfuryl fluoride 2SeO3 + SeF4 ... Selenium atoms are 4-coordinate, bond lengths being Se−O bridging are 175 pm and 181 pm, non-bridging 156 and 154 pm. SeO3 in ... Selenium trioxide is difficult to prepare because it is unstable with respect to the dioxide: 2 SeO3 → 2 SeO2 + O2 It has been ... Selenium trioxide is the inorganic compound with the formula SeO3. It is white, hygroscopic solid. It is also an oxidizing ...
Selenium dichloride
... has been prepared by treating gray selenium with sulfuryl chloride. Adducts of selenium dichloride with ... Solutions of selenium dichloride are unstable at room temperature, forming selenium monochloride after several minutes at room ... Selenium(II) compounds, Chlorides, Nonmetal halides, Chalcohalides, Selenium halides). ... Selenium dichloride is the inorganic compound with the formula SeCl2. It forms red-brown solutions in ethers. ...
Selenium cycle
The selenium cycle is a biological cycle of selenium similar to the cycles of carbon, nitrogen, and sulfur. Within the cycle, ... If the compounds were not oxidized, then an increase in organic selenium would be seen, but selenium in these areas is mainly ... It is also thought that microorganisms may be able to oxidize selenium of valence zero to selenium of valence +6. Evidence for ... In the selenium cycle it has been found that bacteria, fungi, and plants, especially species of Astragalus, metabolize the most ...
Selenium tetrafluoride
The first reported synthesis of selenium tetrafluoride was by Paul Lebeau in 1907, who treated selenium with fluorine: Se + 2 ... Konrad Seppelt, Dieter Lentz, Gerhard Klöter "Selenium Tetrafluoride, Selenium Difluoride Oxide (Seleninyl Fluoride), and Xenon ... Selenium(IV) compounds, Fluorinating agents, Chalcohalides, Selenium halides, Substances discovered in the 1900s). ... "Action of Fluorine on Selenium Tetrafluoride of Selenium". Comptes Rendus de l'Académie des Sciences de Paris. 144: 1042. ...
Selenium dibromide
... is a compound made of one selenium and two bromine atoms. It is unstable. No solid form of the compound has ... In acetonitrile solution, selenium reacts with SeBr4 to form an equilibrium mixture containing SeBr2, Se2Br2 and Br2. This ... and its reaction with titanocene pentasulphide to give cyclic selenium sulphides of ring size 6, 7, 8, and 12". Polyhedron. 9 ( ... "The molecular structure of selenium dibromide as determined by combined gas-phase electron diffraction-mass spectrometric ...
Selenium disulfide
"Chemicals of Selenium". selenium.se. Archived from the original on 2008-04-03. "Selenium sulfide". DermNet NZ. New Zealand ... Selenium disulfide appears to be much less toxic than other selenium salts, which may be attributed to its low aqueous ... Selenium disulfide is available as a generic medication and over the counter. Selenium disulfide is sold as an antifungal agent ... Selenium disulfide acts as a keratolytic and antifungal agent. Selenium disulfide was approved for medical use in the United ...
Selenium oxide
... may refer to either of the following compounds: Selenium dioxide, SeO2 Selenium trioxide, SeO3 Diselenium ...
Selenium oxybromide
... can be prepared through the reaction of selenium dioxide and selenium tetrabromide. Selenium and selenium ... Selenium oxybromide (SeOBr2) is a selenium oxohalide chemical compound. ... dioxide are reacted with bromine to form selenium monobromide and selenium tetrabromide. Dissolving the selenium dioxide in the ... Selenium oxybromide is a reddish-brown solid with a low melting point (41.6 °C) and chemical properties similar to selenium ...
Selenium tetrabromide
... could be produced by mixing elemental bromine and selenium: S e + 2 B r 2 → S e B r 4 {\displaystyle {\rm ... I. A Spectrophotometric Study of the Dissociation of Selenium Tetrabromide and Selenium Dibromide in Carbon Tetrachloride ... Selenium(IV) compounds, Bromides, Selenium halides, All stub articles, Inorganic compound stubs). ... Selenium tetrabromide is an inorganic compound with a chemical formula SeBr4. ...
Selenium chloride
... may refer to either of the following: Selenium monochloride, Se2Cl2 Selenium dichloride, SeCl2 Selenium ...
Selenium dioxide
The selenium starting material is reduced to selenium, and precipitates as a red amorphous solid which can easily be filtered ... "Selenium dioxide safety and hazards". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-12-02. "Selenium compounds (as Se)". Immediately ... Selenium dioxide can also be used to synthesize 1,2,3-selenadiazoles from acylated hydrazone derivatives. Selenium dioxide ... doi:10.1016/S0040-4039(01)88895-X. Bernd E. Langner "Selenium and Selenium Compounds" in Ullmann's Encyclopedia of Industrial ...
Selenium hexasulfide
... and other selenium sulfides with formula SenS8−n. There are several isomers depending on the relative placement of the selenium ... Selenium hexasulfide is a chemical compound with the chemical formula Se2S6. Its molecular structure consists of a ring of two ... The reaction produces also cyclooctaselenium Se8 and all other eight-member cyclic selenium sulfides, except ... and a New Route to Selenium Sulfides SenS8−n (n = 1−5): X-ray Crystal Structures of SeCl2(tht)2 and SeCl2·tmtu". Inorganic ...
Selenium (software)
"Selenium 1 (Selenium RC) :: Documentation for Selenium". www.selenium.dev. Retrieved December 20, 2020. sparkdatabox_author. " ... Selenium RC has been officially deprecated in favor of Selenium WebDriver. At the core of Selenium is Selenium WebDriver, an ... "Selenium 4.11.0 Released!". Retrieved August 22, 2023 - via Selenium. "Downloads". Selenium. "The Selenium Browser Automation ... Selenium Remote Control was a refactoring of Driven Selenium or Selenium B designed by Paul Hammant, credited with Jason as co- ...
Isotopes of selenium
In paleobiogeochemistry, the ratio in amount of selenium-82 to selenium-76 (i.e, the value of δ82/76Se) can be used to track ... Isotopes of selenium, Selenium, Lists of isotopes by element). ... Stüeken, Eva E. "Selenium isotopes as a biogeochemical proxy in ... Selenium (34Se) has six natural isotopes that occur in significant quantities, along with the trace isotope 79Se, which occurs ... "Standard Atomic Weights: Selenium". CIAAW. 2013. Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04 ...
Selenium in biology
Look up selenium in Wiktionary, the free dictionary. WebElements - Selenium NIH - Selenium Fact Sheet for Consumers Assay - ... Selenium-containing proteins are produced from inorganic selenium via the intermediacy of selenophosphate (PSeO33−). Selenium ... A list of selenium-rich foods can be found on The Office of Dietary Supplements Selenium Fact Sheet. This article incorporates ... Selenium is a component of the amino acids selenocysteine and selenomethionine. In humans, selenium is a trace element nutrient ...
Selenium responsive proteins
... within human biology, are the class of proteins sensitive to selenium, in healthy human beings, in ... "Selenium responsive proteins in sera of selenium-enriched yeast supplemented healthy African American and Caucasian men". ... "Proteomic Profiling of Potential Molecular Targets of Methyl-Selenium Compounds in the Transgenic Adenocarcinoma of Mouse ...
L-seryl-tRNASec selenium transferase
... cysteinyl-tRNASec-selenium transferase, and cysteinyl-tRNASec-selenium transferase. This enzyme participates in selenoamino ... In enzymology, a L-seryl-tRNASec selenium transferase (EC 2.9.1.1) is an enzyme that catalyzes the chemical reaction L-seryl- ... The systematic name of this enzyme class is selenophosphate:L-seryl-tRNASec selenium transferase. Other names in common use ... This enzyme belongs to the family of transferases, specifically those transferring selenium-containing groups ...
Selenium and Vitamin E Cancer Prevention Trial
March 2014). "Baseline selenium status and effects of selenium and vitamin e supplementation on prostate cancer risk". Journal ... January 2009). "Effect of selenium and vitamin E on risk of prostate cancer and other cancers: the Selenium and Vitamin E ... The review concluded that "no convincing evidence suggests that selenium supplements can prevent cancer in humans." Selenium ... who were assigned randomly to receive either both a selenium and vitamin E supplement, selenium and placebo, vitamin E and ...
Norilsk
... selenium and zinc are released into the air every year. Nickel ore is smelted at the company's processing site at Norilsk. This ... metallic selenium and tellurium, sulfuric acid. The company produces 35% of the world's palladium, 25% of its platinum, 20% of ... selenium; and by gases (such as nitrogen and carbon oxides, sulfur dioxide, phenols and hydrogen sulfide). The Institute ...
Military nutrition
... selenium; and dietary fiber. If military planners had used modest amounts of the canned vegetables and fruit available in 1915 ...
Selenium monochloride
An improved method involves the reaction of a mixture of selenium, selenium dioxide, and hydrochloric acid: 3 Se + SeO2 + 4 HCl ... Selenium compounds, Chlorides, Nonmetal halides, Chalcohalides, Selenium halides). ... Selenium monochloride or diselenium dichloride is an inorganic compound with the formula Se2Cl2. Although a common name for the ... Selenium dichloride degrades to diselenium dichloride after a few minutes at room temperature: 3 SeCl2 → Se2Cl2 + SeCl4 ...
Selenium meter
A selenium meter is a light-measuring instrument based on the photoelectric properties of selenium. The most common use of such ... The simplest type of match-needle selenium meter shows a clockhand on the meter's scale. This can be moved by turning one slice ... A compromise for expensive rangefinder or SLR or twin lens reflex cameras was to offer a selenium meter as optional device that ... The mechanical part of a selenium meter is an analog calculator which accepts exposure value and film speed as input parameters ...
Selenium fluoride
... may refer to: Selenium tetrafluoride (selenium(IV) fluoride), SeF4 Selenium hexafluoride (selenium(VI) ...
Selenium deficiency
"Selenium intake and serum selenium in Finland: effects of soil fertilization with selenium". The American Journal of Clinical ... In Finland, selenium salts are added to chemical fertilizers, as a way to increase selenium in soils. Dietary supplements may ... In areas where selenium deficiency in livestock is a concern, selenium (as selenite) may be supplemented in feed. In some ... Selenium deficiency is uncommon, but regions in China, Europe, Russia, and New Zealand have low levels of selenium in croplands ...
Sulfur selenium battery
A selenium sulfur battery is a lithium rechargeable battery that in prototype has an energy density of 500 watt-hours/kg. It is ... The cathode is made from sulfur and selenium. The prototype exceeds 1100 Wh/kg at a discharge rate of 0.4C, and 804 Wh/kg at a ... Hanley, Steve (2023-07-14). "Sulfur Selenium Solid-State Battery From NASA Breaks Energy Storage Boundaries". CleanTechnica. ...