反应条件对壳聚糖/果糖美拉德产物抗氧化性和抑菌性的影响

Effect of reaction conditions on antioxidant and antibacterial properties of MRPs by chitosan/fructose

摘要: 壳聚糖具有较强的抑菌性,但其抗氧化性能较差。通过美拉德反应,对壳聚糖进行改性,以增强其抗氧化性和抑菌性。研究了壳聚糖/果糖配比、反应温度、pH和反应物浓度对美拉德产物(MRPs)的抗氧化性和抑菌性的影响。结果表明,壳聚糖/果糖配比1∶1,反应温度121℃,反应体系初始pH5.0,反应物浓度2%时,所得到的MRPs的抗氧化性和抑菌性较强;通过美拉德反应的改性处理,壳聚糖MRPs的抗氧化性和抑菌性明显优于壳聚糖本身。

Abstract: Chitosan possesses strong antibacterial properties but poor antioxidant activities. Chitosan was modified by Maillard reaction to improve its antioxidant and antibacterial properties. Effects of the ratio of chitosan/fructose, reaction temperature, pH and reactant concentration on antioxidant and antimicrobial properties of Maillard reaction products (MRPs) were investigated. The results showed that MRPs possessed strong antioxidant and antimicrobial properties when the ratio of chitosan/fructose 1 ∶1, reaction temperature121℃, pH5.0, and reactant concentration of 2%. Through Maillard reaction, antioxidant and antimicrobial properties of MRPs of chitosan were significantly superior to chitosan itself.