Magnesium oxide Magnesium oxide Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of and consists of a lattice of Mg ions and O ions held together by ionic bonding. Magnesium hydroxide forms in the presence of water (MgO + HO → Mg(OH)), but it can be reversed by heating it to separate moisture. Magnesium oxide was historically known as magnesia alba (literally, the white mineral from magnesia – other sources give magnesia alba as MgCO), to differentiate it from "magnesia
Nitrous-oxide reductase competent unit. The Cu center can undergo a one-electron redox change and hence has a function similar to that in the well-known aa-type cytochrome "c" oxidases () where it serves to receive an electron from soluble cytochromes "c". Acetylene is the most specific inhibitor of nitrous-oxide reductase. Other inhibitors include azide anion, thiocyanate, carbon monoxide, iodide, and cyanide. Nitrous-oxide reductase In enzymology, a nitrous oxide reductase also known as nitrogen:acceptor oxidoreductase (NO-forming) is an enzyme that catalyzes the final step in bacterial denitrification, the reduction of nitrous oxide to dinitrogen. It plays a critical role in preventing release of a