Term: selenium (Se)
Literally meaning: “pertaining to moon”
Origin: Anc Greek
Selenium was named by Swedish chemist Jons Jacob Berzelius in 1817 ((1779-1848) when he noticed that selenium is associated with tellurium (named for the Earth). It was discovered as a byproduct of sulphuric acid production resulting from sulfide ores in mines of Falun (Sweden). Berzelius noticed that this element was contributing workers illness in the acid production.
In 1937 A. L Moxon he identified that selenium is the toxic element in some livestock-poisoning plants mistakenly called “alkali disease”. Twenty years later the German Klaus Schwarz studied problems of liver necrosis in rats and he proved that selenium is an essential trace mineral nutrient.
Selenium is a chemical element with atomic number 34 and atomic mass of 78.96, that is found mainly in sulfide ores. It is necessary, in trace amounts, for some enzyme biosynthesis and function in many organisms, known as selenoproteins.