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Selenium is found in metal sulfide ores, where it substitutes for sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores. Minerals that are pure selenide or selenate compounds are rare. The chief commercial uses for selenium today are glassmaking and pigments. Selenium is a semiconductor and is used in photocells.
Selenium is a component of the amino acids selenocysteine and selenomethionine. In humans, selenium is a trace element nutrient that functions as cofactor for glutathione peroxidases and certain forms of thioredoxin reductase. [1] Selenium-containing proteins are produced from inorganic selenium via the intermediacy of selenophosphate (PSeO 3 3 ...
Selones (R 2 C=Se) are the selenium analogues of ketones. They are rare due to their tendency to oligomerize. [11] Diselenobenzoquinone is stable as a metal complex. [12] Selenourea is an example of a stable compound containing a (formal) C=Se bond. Thioselenides (R−Se−S−R), compounds with selenium(II)–sulfur(II) bonds, analogous to ...
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The isotope selenium-75 has radiopharmaceutical uses. For example, it is used in high-dose-rate endorectal brachytherapy, as an alternative to iridium-192. [8]In paleobiogeochemistry, the ratio in amount of selenium-82 to selenium-76 (i.e, the value of δ 82/76 Se) can be used to track down the redox conditions on Earth during the Neoproterozoic era in order to gain a deeper understanding of ...
Make an ordered list. The default is a numbered list, but you can change it to a list with roman numbers or letters of the English, Greek, Armenian or Georgian alphabets, instead of the decimal enumerator. Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status First item to list 1 no description Unknown required Second ...
Selenium oxydichloride is the inorganic compound with the formula SeOCl 2. It is a colorless liquid. It is a colorless liquid. With a high dielectric constant (55) and high specific conductance, it is an attractive solvent.
Brazil nuts are a particularly rich source of selenium, with just 28 g (1 oz) supplying 544 micrograms of selenium or 10 times the DV of 55 micrograms. [37] [38] However, the amount of selenium within batches of nuts may vary considerably. [39] The high selenium content is used as a biomarker in studies of selenium intake and deficiency.