食品科学 ›› 2007, Vol. 28 ›› Issue (2): 78-83.

• 基础研究 • 上一篇    下一篇

对羟基苯甲酸壳聚糖酯的抑菌活性研究

 赵希荣, 夏文水   

  1. 江南大学食品学院; 江南大学食品学院 江苏无锡214036 淮阴工学院食品工程系; 江苏淮安223001; 江苏无锡214036;
  • 出版日期:2007-02-15 发布日期:2011-12-31

Research on Antimicrobial Activity of Chitosan p-Hydrobenzoate

 ZHAO  Xi-Rong, XIA  Wen-Shui   

  1. 1.School of Food Science and Technology, Southern Yangtze University, Wuxi 214036, China; 2.Department of Food Engineering, Huaiyin Institute of Technolgy, Huaian 223001,China
  • Online:2007-02-15 Published:2011-12-31

摘要: 试验结果表明对羟基苯甲酸壳聚糖酯具有广谱的抑菌活性,无论是革兰氏阴性菌或阳性菌,还是酵母菌和霉菌,该酯都有很强的抑菌效果。对羟基苯甲酸壳聚糖酯对金黄色葡萄球菌和大肠杆菌的MIC(minimum inhibi-tory concentrations)值分别达到了0.01%和0.025%。对羟基苯甲酸壳聚糖酯在更大的pH值(pH4~10)范围内呈现强烈的抑菌活性,比反应物壳聚糖(pH6.0以下)的应用范围更宽;由于壳聚糖结构单元上存在游离氨基的缘故,所以对羟基苯甲酸壳聚糖酯在酸性环境下对细菌的抑菌活性优于在碱性环境中。对羟基苯甲酸壳聚糖酯的热稳定性良好。在苹果汁和肉汁食品体系中,对羟基苯甲酸壳聚糖酯仍表现出强烈的抑菌活性。

关键词: 对羟基苯甲酸壳聚糖酯, 最低抑菌浓度, 抗菌活性

Abstract: Chitosan p-hydroxybenzote could inhibit the growth of all the bacteria and fungus tested. The minimum inhibitory concentrations (MICs) of chitosan p-hydroxybenzoate for S.aureus and E.coli respectively are 0.01% and 0.025%. Chitosan p- hydroxybenzoate shows strong antimicrobial effect at a wide pH range (pH4~8). Because of the existence of free amino group on chitosan unit. The antimicrobial activity of the ester in acid solution is superior to that in basic solution. The ester shows good heat-stability. In food systems such as apple juice and meat extrude, chitosan p-hydroxybenzoate still behaves strong antimicro- biala ctivity.

Key words: chitosan p-hydroxybenzoate, MICs, antimicrobial activity