桑白皮中白藜芦醇、氧化白藜芦醇和桑皮苷的抗氧化活性

Antioxidant Activities of Resveratrol,Oxyresveratrol,Esveratrol,Mulberroside A from Cortex mori

二苯乙烯类化合物具有很好的抗氧化和抑制酪氨酸酶的活性,以熊果苷、VC、VE为参照,对桑白皮中的3种二苯乙烯类化合物(氧化白藜芦醇、白藜芦醇、桑皮苷)的抗氧化和清除自由基的生物活性进行比较研究。结果表明:还原力强弱:VC>白藜芦醇>氧化白藜芦醇>VE>熊果苷>桑皮苷;清除DPPH自由基能力:VC>VE>氧化白藜芦醇>白藜芦醇>桑皮苷>熊果苷;清除ABTS+.能力:白藜芦醇>氧化白藜芦醇>熊果苷>桑皮苷>VC>VE。

Stilbene compounds can protect foods from oxidation and inhibit tyrosinase activity.Using arbutin,vitamin C（VC） and vitamin E（VE） as the reference substances,the antioxidant activities and radical scavenging capacities of 3 kinds of stilbene compounds such as resveratrol,oxyresveratrol and mulberroside A from Cortex mori were investigated.The results showed that the six investigated antioxidant substances ranked in the following order： VC resveratrol oxyresveratrol VE arbutin mulberroside A in terms of their reducing power,VC VE oxyresveratrol resveratrol arbutin mulberroside A in terms of their DPPH radical scavenging capacity,and resveratrol oxyresveratrol arbutin mulberroside A VC VE in terms of their ABTS＋· scavenging capacity.These results will promote their application in food additives.