节节草多糖的体外抗氧化活性

in vitro Antioxidant Activity of Polysaccharides from Equisetum ramosissimum Desf.

从节节草中提取多糖并进行纯化,分别研究其多糖粗品及纯化品对.OH、O2-.、NO2-的清除作用和对油脂氧化的抑制作用,并与VC进行比较。结果表明:两种多糖对.OH、O2-.及NO2-具有不同程度的清除能力,清除效果与多糖质量浓度均呈现一定的量效关系,节节草多糖粗品的清除能力强于纯化品,对油脂氧化有显著的抑制作用,但两种多糖抗氧化效果均弱于VC。

Crude and purified polysaccharides from Equisetum ramosissimum Desf.were evaluated for antioxidant properties and compared with VC.Both crude and purified polysaccharides had scavenging activity against ？OH,O2-？ and NO2-in a concentration-dependent manner.The crude polysaccharides showed stronger free radical scavenging activity and potent inhibitory effect against lipid oxidation,but both polysaccharide samples had weaker antioxidant effect than VC.