核桃楸不同药用部位的抗氧化活性比较

Comparative study on the antioxidant activity of different medicinal parts of Juglans mandshurica Maxim

目的筛选核桃楸抗氧化的有效药用部位。方法对核桃楸叶、树皮、根皮及果皮应用乙醇进行回流提取,采用体外清除1,1-二苯基-2-苦肼基自由基(DPPH)自由基能力研究核桃楸各药用部位乙醇提取物的抗氧化活性,筛选并确定核桃楸抗氧化的有效药用部位。结果核桃楸树皮、根皮活性强于维生素E而弱于维生素C,其他部位活性顺序依次为核桃楸叶、核桃楸果皮。结论核桃楸树皮、根皮系抗氧化有效药用部位;核桃楸叶是一种可持续再生资源,可以为天然抗氧化剂的新来源,并有潜力针对多种疾病进行深度开发。

Objective To screen antioxidant part from different medicinal parts of Juglans mandshurica Maxim.Methods Extracting leaf,bark,root bark and fruit peel with ethanol of Juglans mandshurica Maxim,to research the antioxidant activity of ethanol extracts scavenging ability of DPPH free radical of the medicinal parts of Juglans mandshurica Maxim,to screen and identify the effective antioxidant medicinal parts of Juglans mandshurica Maxim.Results Scavenging free radical activity of vitamin E is strong in bark,root bark,but vitamin C is weak.Other parts of the activity order was leaf and fruit peel.Conclusion Juglans mandshurica bark,root bark are effective antioxidant medicinal parts.Leaf of Juglans mandshurica maxim is a kind of sustainable renewable resources,a new source for natural antioxidants,and has the potential for a variety of diseases for depth development.