Kinetic and Mechanistic Studies of Peroxy, Vitamin E and Anti-Oxidant Free Radicals by Pulse Radiolysis
Autoxidation processes in food and biological systems are based on free radical reactions which involve a variety of organic peroxy radicals, ROO·, oxy radicals, RO· and superoxide radical (sometimes also called perhydroxyl radical), ·O2 − + H+ ⇋ ·O2H. As indicated, the superoxide radical comes in two forms: (a) the anionic form, ·O2 −, which is present predominantly in solutions with pH above pKa = 4.8, and (b) the protonated form, ·O2H, which is present predominantly in the solutions with pH below the pKa value and in less polar media.
KeywordsPolar Medium Free Radical Reaction Peroxy Radical Pulse Radiolysis Phenoxy Radical
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