期刊论文

中文

食品工业科技

1002-0306

2009

5

89-92

国家科技支撑计划

本校为其他机构

以金黄色葡萄球菌和大肠杆菌为实验对象,采用抑菌环实验研究了儿茶素的最小抑菌浓度,并对儿茶素作为抑菌剂的稳定性作出了评价,同时还研究了儿荼素可能存在的抑菌机理.结果显示,儿茶素对金黄色葡萄球菌和大肠杆菌的最小抑菌浓度分别为0.32g/L和1.25g/L;儿茶素的抑菌效果较大程度地受温度和pH的影响,较小程度受紫外照射的影响;儿茶素会抑制金黄色葡萄球菌和大肠杆菌的对数生长期,增加细菌细胞膜的通透性,造成细菌胞内蛋白质和糖类物质的渗漏,使细菌代谢发生紊乱,儿茶素的抑菌作用不是通过抑制呼吸代谢而引起的.

The minimal bacteriostasic concentration, stability and mechanism of catechins toward S.aureaus and E.coli were studied.The result showed that the MIC of catechins on S.aureaus and E.coli respectively were 0.32g/L and L25g/L.Temperature and pH influenced the bacteriostasic activity of catechins in large extent and UV irradiation had a little influence on the bacteriostasic activity of catechins.This experiment proved that the antibacterial mechanisms of catechins were to restrain logarithmic growth of S.aureaus and Ecoli, to increase the permea...