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在自由基生物学中超氧化物自由基(O_2或HO_2~·)、H_2O_2、~·OH、单线态氧(~1O_2)与脂质(LH)过氧化链式反应的中间产物LO~·、LO_2~·和LOOH等较O_2活泼的自由基或非自由基统称为活性氧。生物体内某些生化反应如前列腺素的合成需要利用活性氧,但超过利用浓度的活性氧却对机体有害。很多事实表明,生物体内活性氧不断在产生,也不断地被清除,遂可维持低水平的、有利无害的平衡浓度。在衰老和许多病理情况下,活性氧的产生
In the free radical biology, the LO ~ · LO 2, LO 2, H 2 O 2, ~ · OH, the intermediates of the singlet oxygen (~ 1 O 2) and lipid (LH) ~ · And LOOH than O 2 lively free radicals or non-free radicals collectively referred to as reactive oxygen species. Certain biochemical reactions in organisms such as prostaglandins require the use of reactive oxygen species, but more than the concentration of active oxygen is harmful to the body. Many facts show that the body of active oxygen is constantly being produced, but also continue to be cleared, then can maintain a low level, beneficial harmless balance concentration. In aging and many pathological conditions, the production of reactive oxygen species