摘要
以银杏（ＧｉｎｋｇｏｂｉｌｏｂａＬ．）树的果实白果为原料，采用ｐＨ７．８的磷酸盐缓冲抽提６ｈ，用硫酸铵分级沉淀的方法，首次由白果制备出有较高活性的超氧阴离子自由基清除剂．该清除剂对邻苯三酚自氧化系统产生的Ｏ－·２有较强的清除能力．每毫升清除剂的活性约相当于ＳＯＤ１２０Ｕ酶活力单位．热稳定试验表明，在２５～７５℃范围内，银杏超氧自由基清除剂的活性无明显降低．
The superoxide radical scavenger of Ginkgo was prepared from Semen Ginkgo.This superoxide radical scavenger exhibted superoxide anion scavenging activity.Heat test showed that the activity of superoxide radical scavenger was not affect from 25 ℃ to 75 ℃ at pH 8.2.
出处
《中南民族学院学报（自然科学版）》
1998年第2期6-9,共4页
Journal of South-Central University for Nationalities(Natural Sciences)
关键词
银杏
超氧自由基
清除剂
制备
热稳定性
Ginkgo biloba L.
superoxide radical scavenger
preparation
heat stability
