不同品种枣总提物体外抗氧化性能比较

目的]分析并比较不同品种枣总提物的体外抗氧化性能。方法]对湖南衡南地区的药枣、小米枣及祁东地区的药枣、鸡蛋枣、梨枣、子代糖枣、母本糖枣、酸枣共8个品种的枣进行水提取,通过考察其总提物羟基自由基清除力、1,1-二苯基-2-三硝基苯肼(DPPH)自由基清除力来初步评价其体外抗氧化性能的强弱。结果]8个品种枣总提物清除自由基能力差别较大,其中衡南的药枣清除自由基能力明显强于其他品种枣,衡南小米枣及祁东梨枣清除自由基能力仅次于衡南药枣,且8个品种枣总提物对DPPH自由基清除力均高于其对羟基自由基相应的清除能力。结论]枣总提物具有一定的体外抗氧化性,这为筛选优质枣品种提供了有利依据。

Comparison of Antioxidant Activity in vitro of the Total Extracts from Different Varieties of Jujube

Objective] To analyze and compare in vitro antioxidant activity of the total extracts from different varieties of jujube.Method]Eight varieties of jujube including Hengnan medicinal jujube,millet jujube and Qidong medicinal jujube,egg date,pear jujube,offspring sugar jujube,female parent jujube,wild jujube were extracted with water,the antioxidant activity in vitro was evaluated through investigating their hydroxyl radical scavenging and DPPH free radical scavenging abilities.Result] The free radical scavenging ability of total extracts from 8 kinds of jujube had significant differences,among them,the ability of medicinal jujube from Hengnan was obviously stronger than that of other varieties of jujube,millet jujube of Hengnan and pear jujube took the second place,DPPH free radical scavenging abilities of total extracts from 8 varieties of jujube were all higher than OH free radical scavenging abilities.Conclusion] The total extracts from jujube has a certain antioxidant activity in vitro,which will provide a favorable basis for selecting high quality jujube varieties.