【摘要】 目的　研究了荷叶水提物 (L L E)对羟基自由基 (· OH)和超氧阴离子自由基 (O÷2 )的清除效果。方法　采用电子自旋共振法自旋捕集技术。结果　 2 6 .95 μg/ m L 的 L L E对次黄嘌呤 -黄嘌呤氧化酶体系产生 O÷2 的清除率达6 5 .6 % ,L L E浓度大于 8.98mg/ m L时可以全部清除由 Fenten反应体系产生的· OH。结论　 L L E对· OH和O÷2 有很强的清除能力更多还原

【Abstract】 Object To study the action of lotus leaf extract (LLE) in scavengings hydroxyl and superoxide anion radical Methods By spin trapping with electron spin resonance Results 26 94 ug/mL LLE can scavenge 65 60% superoxide anion radical (O ÷ 2) produced by Hypoxanthine Xanthine oxidase system, while at concentrations over 8 98 mg/mL a complete eradication of hydroxyl radical (·OH) produced from Fenten reaction system was achieved Conclusion LLE is highly effective in scavenging ·OH and O ÷ 2 free radicals更多还原