a substance that protects cells from the damage caused by free radicals (unstable molecules made by the process of oxidation during normal metabolism). free radicals may play a part in cancer, heart disease, stroke, and other diseases of aging. antioxidants include beta-carotene, lycopene, vitamins a, c, and e, and other natural and manufactured substances.
出典:Wiktionary
antioxidant (複数形 antioxidants)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/15 23:53 UTC 版)
An antioxidant is a molecule capable of inhibiting the oxidation of other molecules. Oxidation is a chemical reaction that transfers electrons from a substance to an oxidizing agent. Oxidation reactions can produce free radicals. In turn, these radicals can start chain reactions. When the chain reaction occurs in a cell, it can cause damage or death. When the chain reaction occurs in a purified monomer, it produces a polymer resin, such as a plastic, a synthetic fiber, or an oil paint film. Antioxidants terminate these chain reactions by removing free radical intermediates, and inhibit other oxidation reactions. They do this by being oxidized themselves, so antioxidants are often reducing agents such as thiols, ascorbic acid or polyphenols.
a sudatory
an antidiluvian
さび止め.
a reagent