杜仲叶茶与蓝锭果提取物的体外抗氧化性研究

Study on in-vitro antioxidant activity of Eucommia ulmoides leaves tea and honeysuckle extracts

中文关键词:  杜仲叶茶  蓝锭果提取物  体外抗氧化

英文关键词:Eucommia ulmoides leaves tea  honeysuckle extracts  in-vitro antioxidant activity

中文摘要:

      目的 比较和探讨杜仲叶茶和蓝锭果提取物的体外抗氧化能力。方法 以清除率和抑制率为主要评价指标, 对样品进行自由基清除、还原力以及抗油脂和抗脂质过氧化能力的测定, 并以维生素C为对照实验进行比较。结果 随着浓度的增加, DPPH?自由基、羟自由基及超氧自由基的清除率、抗脂质氧化抑制率均逐步提高。杜仲叶茶的还原能力明显优于蓝锭果提取物和维生素C。2种植物提取物及维生素C对ABTS+自由基的清除率普遍低于对其他自由基的清除作用, 蓝锭果提取物在清除ABTS+自由基方面效果最优, 当杜仲叶茶和蓝锭果提取物提取液浓度为0.5 mg/mL时, 其抗油脂氧化能力均弱于维生素C。结论 杜仲叶茶和蓝锭果提取物均有一定的抗氧化作用, 该研究可为杜仲和蓝锭果的功能性产品开发提供一定的指导思路。

英文摘要:

      Objective To compare and discuss the in-vitro antioxidant activity of the Eucommia ulmoides leaves tea and honeysuckle extracts. Methods The scavenging effects and inhibition rate were used as evaluation indicators to determine the free radical scavenging, reducing capability, and anti-oil and anti-lipid peroxidation capabilities. Vitamin C was used as a control experiment for comparison. Results As the concentration increased, the scavenging rate of DPPH? free radicals, hydroxyl free radicals and superoxide free radicals and the inhibition rate of anti-lipid oxidation were gradually increased. The reducing ability of Eucommia ulmoides leaves tea was significantly better than that of honeysuckle extract and vitamin C. The scavenging effects of two kinds of plant extracts and vitamin C on ABTS+ free radicals were generally lower compared with those of other free radicals. Honeysuckle extract had the best effect in scavenging ABTS+ free radicals. When the concentration of Eucommia ulmoides leaves tea and honeysuckle extract reached 0.5 mg/mL, the anti-oxidation ability to oil was weaker than that of vitamin C. Conclusion The extracts of Eucommia ulmoides leaf tea and Blue ingotta fruit have certain antioxidant effects. This study can provide some guidance for the development of functional products of Eucommia ulmoides and honeysuckle.