β-甲壳质及其脱乙酰衍生物的特性  

The characteristics of p-chitin and its deacetyl derivative

作　　者：蒋霞云[1] 王慥[1] 李兴旺[1] 

机构地区：[1]上海水产大学食品学院,上海200090

出　　处：《上海水产大学学报》2002年第4期348-352,共5页Journal of Shanghai Fisheries University

基　　金：上海市高等教育发展基金(98-12)

摘　　要：对β-甲壳质及其脱乙酰衍生物的特性与α-甲壳质及其脱乙酰衍生物进行了比较研究。结果表明:红外光谱和X-衍射图谱都可以用来表征甲壳质,但只有X-衍射图谱可以区分其α和β型结构;β-壳聚糖和α-壳聚糖在高浓度(大于0.01％)时对金黄色葡萄球菌和大肠杆菌均有明显的抑菌作用,而在低浓度(0.001％)下,由于本试验所用的β-壳聚糖兼有高粘度和高脱乙酰度,抑菌作用强于α-壳聚糖。Some characteristics of β-chitin and its deacetyl derivative were studied compared with a-chitin and its deacetyl derivative. The results showed that chitin could be identified by its IR spectrum and X-ray diffraction pattern. Only the latter could distinguish two different crystal types ( α or β) ; Against Staphylococcus aureus and Escherichia coli, both β-chitosan and α-chitosan had antibiotic activity obviously when the concentrations were more than 0.01% . While the concentrations were low(0.001 % ) , β-chitosan showed stronger antibiotic activity than α-chitosan because of its high viscosity and high degree of deacetylation.

关 键 词：脱乙酰衍生物 β-甲壳质 β-壳聚糖 红外光谱 X-衍射 抑菌作用 α-甲壳质 

分 类 号：TQ281[化学工程—有机化工]