“free radical”的概念、定义、翻译、参考文献-科学参考

free radical

Chemistry

An atom or group of atoms with an unpaired valence electron. Free radicals can be produced by photolysis or pyrolysis in which a bond is broken without forming ions (see homolytic fission). Because of their unpaired valence electron, most free radicals are extremely reactive. See also chain reaction.

Biology

An atom or group of atoms with an unpaired valence electron. Free radicals are formed when a bond is broken without forming ions. Because of their unpaired electrons, most free radicals are extremely reactive. For example, superoxide free radicals, formed in the body during normal metabolic processes and as a reaction to toxins and infections, have damaging effects on cells and tissues. See also antioxidants; reactive oxygen species; superoxide dismutase.

单词	free radical
释义	free radical Chemistry An atom or group of atoms with an unpaired valence electron. Free radicals can be produced by photolysis or pyrolysis in which a bond is broken without forming ions (see homolytic fission). Because of their unpaired valence electron, most free radicals are extremely reactive. See also chain reaction. Biology An atom or group of atoms with an unpaired valence electron. Free radicals are formed when a bond is broken without forming ions. Because of their unpaired electrons, most free radicals are extremely reactive. For example, superoxide free radicals, formed in the body during normal metabolic processes and as a reaction to toxins and infections, have damaging effects on cells and tissues. See also antioxidants; reactive oxygen species; superoxide dismutase.
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