6 HARNISAVLJEVIC, JAKOVLJEVIC M,MILJKAVFIC J, et al. Structural study of anacidicpolysac charide isolated from Aloear borescens[A]. MILL P．Riodate Oxidation andPartialacid Hydrolysis[C]．Belgrad:Glas Hem Drus，1981.269-273.
7 GOWDA C B, ANJANEYALU YV．Structural studies of polysac charides from Aloevera[J]．Carboyd，1979，(72)：201-205.
9Kotze AF, Luessen HL, De Boer AG,et al. Chitosan for enhanced intestinal permeability: prospects for derivatives soluble in neutral and basic environment [J]. Eur J Pharm Sci,1998,7(7) :145-151.
10Sieval AB ,Thanou M, Kotze AF,et al. Preparation and NMR-characterization of highly substituted N-trimethyl chitosan chloride [ J ]. Carbohydr Polym, 1998,36 (2-3) :157-165.
