4Zhang M, Cui S W, Cheung P C K, et al, Antitumor polysac- charides from mushrooms: a review on their isolation process, structural characterisics and antitunaor activity [ J ]. Trends in Foad Science & Technology, 2007, 18(1): 4-19.
5Liu Nan, Chen Xiguang, Park Hyunjin, et al. Effect of MW and concentration of chitosan on antibacterial activity of Esche- richia coli[ J]. Carbohydr Polym, 2006, 64(1): 60-65.
