Selenium compounds are compounds containing the element selenium (Se). Among these compounds, selenium has various oxidation states, the most common ones being −2, +4, and +6. Selenium compounds exist in nature in the form of various minerals, such as clausthalite, guanajuatite, tiemannite, crookesite etc., and can also coexist with sulfide minerals such as pyrite and chalcopyrite.[1] For many mammals, selenium compounds are essential. For example, selenomethionine and selenocysteine are selenium-containing amino acids present in the human body. Selenomethionine participates in the synthesis of selenoproteins.[2] The reduction potential and pKa (5.47) of selenocysteine are lower than those of cysteine, making some proteins have antioxidant activity.[3] Selenium compounds have important applications in semiconductors, glass and ceramic industries, medicine, metallurgy and other fields.[4]
^""无上"文明古国:郭实猎笔下的大英", “无上”文明古国:郭实猎笔下的大英, UniSIM Centre for Chinese Studies, SIM University, pp. 1–268, Mar 2015, retrieved 2023-12-01