Amine oxide Amine oxide An amine oxide, also known as amine-"N"-oxide and "N"-oxide, is a chemical compound that contains the functional group RN−O, an N−O coordinate covalent bond with three additional hydrogen and/or hydrocarbon side chains attached to N. Sometimes it is written as RN→O or, wrongly, as RN=O. In the strict sense, the term "amine oxide" applies only to oxides of tertiary amines. Sometimes it is also used for the analogous derivatives of primary and secondary amines. Examples of amine oxides include pyridine-"N"-oxide, a water-soluble crystalline solid with melting point 62–67 °C, and "N"-methylmorpholine "N"-oxide, which is an oxidant. Amine oxides
Nitric oxide could include impaired immune and respiratory function. NO is a gaseous signaling molecule. It is a key vertebrate biological messenger, playing a role in a variety of biological processes. It is a known bioproduct in almost all types of organisms, ranging from bacteria to plants, fungi, and animal cells. Nitric oxide, known as an endothelium-derived relaxing factor (EDRF), is biosynthesized endogenously from -arginine, oxygen, and NADPH by various nitric oxide synthase (NOS) enzymes. Reduction of inorganic nitrate may also serve to make nitric oxide. One of the main enzymatic targets of nitric oxide is guanylyl cyclase. The binding of nitric