几种天然植物花色苷体外清除自由基活性比较研究

为了研究天然植物花色苷的抗氧化活性，本实验用醇提法从几种天然植物中提取出花色苷，采用DPPH自由基体系、羟基自由基体系以及超氧阴离子自由基体系，对其体外清除自由基活性进行研究并通过IC50值比较各植物花色苷清除自由基活性的强弱。结果表明，荔枝皮花色苷清除DPPH自由基、楮果花色苷清除羟基自由基、桑椹花色苷清除超氧阴离子自由基的活性最强，并且各植物花色苷在不同自由基体系中表现出不同的抗氧化活性。

Comparison of Free Radical-scavenging Capacity among Several Plant Anthocyanins in vitro

In order to study the antioxidant activity of natural anthocyanins, anthocyanins were firstly extracted from several varieties of plants with 0.1% HCl in 95% ethanol solution, then DPPH, hydroxyl and superoxide anion radical systems were used to investigate their antioxidant activities in vitro, and finally the antioxidative activities of these anthocyanins were compared by their values of IC50. The results indicated that anthocyanins from litchi peel, papermulberry fruit and mulberry fruit have the strongest scavenging capacity to DPPH, hydroxyl and superoxide anion radicals, respectively. Moreover, all these anthocyanins from plants show different scavenging effects to different radicals.