茶多酚与维生素C/E的协同抗氧化作用研究

茶多酚具有较强的抗氧化性,对多种疾病具有预防和治疗作用.为了解茶多酚与其他抗氧化剂之间的协同抗氧化作用,通过体外清除自由基和FRAP总抗氧化能力测定,研究茶多酚与维生素C/E复合物对各种自由基的清除率.结果表明,在茶多酚较低浓度(50、100 mg/L)时,维生素C/E没有显著增强茶多酚清除各种自由基的能力,而在茶多酚较高浓度(200～400 mg/L)时,维生素C/E增强了茶多酚对各种自由基的清除能力.同时,维生素C/E显著提高了高浓度茶多酚的FRAP值,这也说明高浓度茶多酚与维生素C/E在总抗氧化方面具有很好的协同效应.

Research on the synergistic anti-oxidative effects of tea polyphenols and vitamin C/E

Tea polyphenols has strong antioxidant activity, which shows preventive and therapeutic effects on a variety of diseases. In order to understand the synergistic anti-oxidative effects between tea polyphenols and other antioxidants, we tested the antioxidant capacity of tea polyphenols and vitamin C/E by scavenging free radical and total antioxidant capacity determination. The results showed that, at the lower concentration of tea polyphenols (50 mg/L and 100 mg/L), vitamin C/E did not significantly enhance the effects of tea polyphenols on scavenging various free radical. But at the higher concentrations (200~400 mg/L), vitamin C/E enhanced the effects of tea polyphenols on scavenging various free radicals. Meanwhile, vitamin C/E also increased remarkably the FRAP value of tea polyphenols at the higher concentrations, which meand that tea polyphenols and vitamin C/E had an obvious synergistic antioxidant effect at the higher concentrations.