Abstract: In this paper,three chitosans whose deacetylated degree are different were examined against nine bacteria at different conditions by oxford cup method.The results showed that three chitosans had obvious antimicrobial activities on Bacillus cereus,Bacillus typhi murium,Bacillus subtilis,candida albillus,Bacillus pyocyaneus,Escherichia coli and Staphylococcus aureus,and unconspicuous antimicrobial activities on Bacillus megaterium de Bary and Bacillus stearothermophilus Donk.Antimicrobial activities of chitosans enhanced with the solution concentration at the high concentrations.The orders of of antimicrobial activities of different deacetylated degree chitosan were chitosan whose deacetylated degree is 95.96%> chitosan whose deacetylated degree is 86.45%> chitosan whose deacetylated degree is 78.12%.Chitosans showed stronger antimicrobial activities at low pH value.Chitosans can suppress the bacteria completely when the pH was 3.0-5.0.High deacetylated degree chitosan from silkworm chrysalis can keep its antimicrobial activity steadily as preservative in hot-working foods.
赵维,李建科,胡沁沁. 不同脱乙酰度蚕蛹壳聚糖抑菌性能的比较[J]. 食品与发酵工业, 2011, 37(04): 82-86.
Zhao Wei,Li Jian-ke,Hu Qin-qin. Comparetive Study on Antimicrobial Activities of Different Deacetylated Degree Chitosan from Silkworm Chrysalis[J]. Food and Fermentation Industries, 2011, 37(04): 82-86.