7Qin C Q, Li H R, Du Y M, et al. Water-solubility of chitosan and its antimicrobialactivity[J]. Carbohydr. Polym., 2006, 63(3): 367-374.
8Liu XF,Guan YL, Yang DZ,et al. Antibacterial action of chitosan and carboxy-methylated chitosan[J]. J Appl Polym Sci, 2000, 79 (7) : 1324-1335.
9Sun LP,Du YM, Fan LH. Preparation, characterization and antimicrobial activity of quatemized carboxymethyl chitosan and application as pulp-cap[J]. Polym ,2006,47(6) :1796-1804.
10Bonclarenko VM, Chervinets VM, Vorob'ev AA. Role of persisting opportunistic bacteria in the pathogenesis of the gastric and duodenum ulcer[J]. Zh Mikrobiol Epidemiol Immunobiol, 2003 (4) : 11 - 17.
