【摘要】 将玉米须乙醇提取物再用氯仿、乙酸乙脂、正丁醇和甲醇分别萃取,获得极性不同的5个组分,比较这5种不同溶剂萃取物在二苯基苦基苯肼(DPPH)体系及在Fe2+诱发卵黄脂蛋白多不饱和脂肪酸(PUFA)过氧化体系中的抗氧化活性。结果表明:在DPPH体系中,正丁醇萃取物的抗氧化活性最强,氯仿萃取物次之;在Fe2+诱发脂蛋白PUFA过氧化体系中,氯仿萃取物的抗氧化活性最强,乙酸乙酯萃取物次之。结果还表明,这5不同溶剂萃取物在不同测试体系中的抗氧化活性顺序不同。更多还原

【Abstract】 Five components with different polarities in the ethanol extracts of corn silk were obtained by using chloroform,ethyl acetate,n-butanol and methanol as extractant,respectively.The anti-oxidative activities of the five extractions were compared in two systems,DPPH system and Fe²⁺inducing PUFA system.N-butanol extract had the strongest scavenging activity to DPPH free radicals,and the next was chloroform extraction.The anti-oxidative activity of chloroform extract in the Fe²⁺ inducing PUFA system was the strongest,followed by ethyl acetate extract.The same extract had different anti-oxidative activities in these two systems.更多还原