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背景与目的:探讨红景天醇提物和水提物的抗氧化作用及其剂量反应关系。材料与方法:回流法和煎煮法分别制备红景天醇提物和水提物。钙沉淀法提取雄性SD大鼠肝微粒体。采用四种激发剂Vc/Fe^2+、过氧基异丙苯(Cumine hydroperoxide,CHP)、CCls/辅酶Ⅱ(Nieotinamide-adenine dinucleotide phosphate,NADP)和还原型辅酶Ⅱ(Reduced form of nicotinamide-adenine dinucleotide phosphate,NA