Peroxides are intermediates in the autoxidation reaction. Traube did experimental research into inorganic autoxidation and oxygen activation. The best test for autoxidation (oxidative rancidity) is determination of the peroxide value. Aldehydes, particularly arylaldehydes, degrade in air via the process of autoxidation. A focus was the investigation on the Autoxidation of unsaturated cyclic Hydrocarbons to Peroxides. Additives and polymers containing unsaturated bonds are highly prone to autoxidation. It is an autoxidation product of ambrein. For example, triethylphosphite is known to reduce certain hydroperoxides to alcohols formed by autoxidation ("scheme"). The catalysts promote this free-radical autoxidation of the oils with air. Autoxidation&colon; The spontaneous and non-enzymatically-induced autoxidation of arachidonic acid yields 15("R","S")-hydroperoxy-5"Z",8"Z",11"Z",13"E"-eicosatetraenoic acids. Oils with a high degree of unsaturation are most susceptible to autoxidation. A classic example of autoxidation involves the conversion of diethyl ether to its hydroperoxide. Antioxidants inhibit autoxidation that occurs when polymers reacts with atmospheric oxygen. Autoxidation is a free radical chain process. Autoxidation produces hydroperoxides and cyclic organic peroxides.