核桃叶多酚的抗氧化活性测定

Study on the Oxidative Stability of Walnut Leaves

以核桃叶为原料,提取了其中的多酚类物质,通过体外抗氧化实验,测定了核桃叶多酚清除羟自由基、超氧自由基的能力,并以核桃油为底物,研究了核桃叶多酚对核桃油中的不饱和脂肪酸氧化程度的影响。结果表明:核桃叶多酚对羟自由基的清除能力达到53%,对超氧阴离子自由基的清除能力达到68%。同时,由于核桃叶多酚的加入,核桃油脂过氧化值明显减弱。

The extraction of phenolic compounds from walnut leaves. The antioxidant activity of phenolic com- pounds from walnut leaves was investigated by measuring its scavenging ability on hydroxyl radicals and superoxide radicals and the effect of phenolic compounds from walnut leaves to walnut oil was evaluated. The results indicated that phenolic compounds from walnut leaves had good antioxidant activity. The scavenging activity of phenolic com- pounds for hydroxyl radicals and superoxide radicals were 535 and 68% when the concentration was 1 mg/mL. And when the additive quantity of the extract reached 0.05 % , the antioxidant of walnut oil was stronger than that of walnut oil. To study on antioxidant activity of phenolic compounds from walnut leaves, we can make full use of rsources of walnut leaves.