7Keisuke Kurita.Chemistry and application of chitin and chitosan[J].Polymer Degradation and Stability,1998,59:117-120.
8QIN C Q,DU YM,XIAO L.Effect of hydrogen peroxide treatment on the molecular weight and structure of chitosan[J].Pdym De-grad Stab,2002,76:211-218.
9Won-Seok Choi,Kil-Jin Ahm,Dong-Wook Lee,etal.Preparation of chitosan oligomers by irradiation[J].Polymer Dehradation and Stability,2002,78:533-538.
10Ronge Xing,Song Liu,Huahua Yu,et al.Salt-assisted acid hydrolysis of chitosan to oligomets under microwave irradiation[J].Carbonhydrate Research,2005,340:2150-2153.