柳树叶的原花青素的抗氧化性研究

用化学比色法分别测定柳树叶原花青素的总抗氧化力、还原力、对O2-·,·OH,H2O2和屡NO2-的清除作用,并与发Vc相比较,结果表明,在这一系列抗氧试验中,原花青素的抗氧化性均较Vc强,要相同浓度下,二者对O2-·和H2O2的清除作用相差不大,在总抗氧化力和还原力测定和对NO2-清除作用约为Vc的2倍,在对·OH的清除上,原花青素浓度为3 μg/mL时,清除率达8.9%,而Vc浓度为4.8 mg/mL时清除率为10.5%.

Abstract：

The total antioxidative activity and reductive activity of procyanidins(PC) from the leaves of willow and their scavenging of the free radicals O2- · , · OH, H2 O2 and NO2- were studied by spectrophotometry, and the results were compared with the effects of vitamin C (Vc). Procyanidins were shown to have stronger antioxidative activity than Vc, and PC and Vc were not significantly different in their scavenging rate for O2- · and H2O2. The total antioxidative activity, reductive activity and scavenging of NO2- of PC were approximately twice those of Vc. The scavenging rate of PC for · OH was 8. 9% with a PC concentration of 3 μg/mL and that of Vc for · OH was 10.5 % with a Vc concentration of 4.8 mg/mL.

Study on Antioxidantive Activity of Procyanidins from the Leaves of Willow