食品工业科技2013，Vol.34Issue(12)：234-237,242,5.
凌枣黄酮提取及自由基清除能力研究
Extraction technique and free radical scavenging activity of flavonoids prepared from Ling Jujube
摘要
Abstract
Reflux extraction technique and free radical scavenging activity of flavonoids of ling jujube were investigated.Optimum conditions were as follows:ratio of liquid to solid 30∶1 (mL/g),extraction time 2h,extraction temperature 75℃,75％ of ethanol concentration,under the optimal conditions,flavonoids yield of ling jujube flavonoid was 5.01mg/g,three kinds of in vitro antioxidant system(reducing power,hydroxyl radical scavenging,and DPPH radical scavenging) results showed that flavonoid had different degree of antioxidant effects in different parts of ling jujube.the result showed a concentration-dose effect,in different concentration range,free radical scavenging activity of flavonoids from different parts of ling jujube was:flavonoids in the pulp＞flavonoids in entire Ling jujube＞flavonoids in the pit＞flavonoids in the peel,these results showed there were high activity or concentration flavonoids in ling jujube pulp,but free radical scavenging activity of different part of ling jujube were all lower than that of ascorbic acid.关键词
凌枣/黄酮/提取工艺/自由基清除能力Key words
Ling jujube/ flavonoids/ extraction process/ free radical scavenging activity分类
轻工纺织引用本文复制引用
李秀霞,孙协军,冯彦博,李娇,励建荣..凌枣黄酮提取及自由基清除能力研究[J].食品工业科技,2013,34(12):234-237,242,5.基金项目
"十二五"国家科技支撑计划(2012BAD29B06) （2012BAD29B06）
辽宁省食品安全重点实验室开放课题(LNSAKF2011015). （LNSAKF2011015）
