微胶囊化喀什小檗花色素抗氧化特性研究

[目的]研究喀什小檗花色素及其喷雾干燥制取微胶囊的抗氧化活性,以期为工业中应用微胶囊花色素提供一定的指导。[方法]采用DPPH自由基清除法和ABTS自由基清除法测定体外抗氧化活性,研究花色素在不同状态下清除DPPH自由基和ABTS自由基的作用。[结果]不同样品对DPPH自由基的清除能力依次为花色素〉微胶囊花色素;不同样品对ABTS自由基的清除能力依次为花色素〉微胶囊花色素。花色素微胶囊化前后对DPPH自由基和ABTS自由基均有一定的清除效果,但均低于维生素E的清除能力。[结论]花色素抗氧化能力较好,微胶囊花色素因为微胶囊化后花色素含量降低,协同作用降低,所以其抗氧化能力有一定程度的降低,但是花色素微胶囊化后便于贮存,由于花色素被包埋而隔离外界环境,延长了保存时间。

Study on Antioxidant Characteristic of Anthocyanidin from Microencapsulated Berberis kaschgarica Rupr

[Objective] To study the antioxidant activity of Berberis kaschgarica Rupr anthocyanidin and its microcapsule prepared by spray drying method,so as to provide guidance for the application of microencapsulation anthocyanidin in industrial production.[Method] By employing DPPH radical-scavenging method and ABTS radical-scavenging method,the radical scavenging rate of anthocyanidin under different situations were determined.[Result] Both the DPPH and ABTS radical-scavenging rates of different samples were determined to be anthocyanidin> microencapsulation anthocyanidin.The anthocyanidin and microencapsulation anthocyanidin were provided with certain scavenging effect to DPPH and ABTS free radical,which was lower than that of vitamin E.[Conclusion] Anthocyanidin was endowed with better antioxidant ability in comparison with its microcapsule for the content of anthocyanidin was lessened during the microencapsulation,leading to that its synergistic effect was reduced.Anthocyanidin microcapsule was easier to store since the anthocyanidin was embedded.