枸杞多糖体外抗氧化特性研究

Study on Antioxidant Effectiveness of Ch. Wolfberry Polysaccharides

采用超氧阴离子自由基体系、羟基自由基体系、烷基自由基引发亚油酸氧化体系、DPPH(二苯代苦味肼基自由基)体系,对枸杞多糖抗氧化性能进行研究,并同Vc进行比较。结果表明:枸杞多糖对该几种自由基均有不同程度清除作用,其对超氧阴离子清除作用不明显;清除羟基自由基能力与Vc相当;在较小浓度时,清除烷基自由基和DPPH自由基能力弱于Vc,但在较高浓度时与Vc接近。

The antioxidant effectiveness of Ch.wolfberry polysaccharides were studied and compared with Vc using the superoxide radical system, hydroxyl radical system, oxidation system of linoleic acid induced by alkyl radical and system of DPPH. The experimental results show: Ch. wolfberry polysaccharide had different scavenging effect in these radical systems. Its scavenging capability to superoxide radical is not abvious, but to hydroxyl radical is significant and paraller to Vc. Within the low concentration, the reduce power of Ch. wolfberry polysaccharide is lower then Vc, but within the higher concentration, it is equal to Vc.