Objective To study the stability of glucosamine sulfate prepared by spray drying. Methods The microcapsules of glucosamine sulfate were produced by spray drying,and the effects of different adjuvants on the indices of the microcapsules,such as the yield,fluidity,glass transition temperature and store stability were compared. Results and conclusion The yield,fluidity,glass transition temperature and stability of glucosamine sulfate could be greatly improved by adding 0.5%,1.0%,2.0%,3.0% and 5.0% cyclodextrin,gelatin and copvidone.

The carboxymethyl soybean polysaccharides had been synthesized and the mechanical strength, solubility, bacteriostasis of algin, algin carboxymethyl soybean polysaccharides alloy membrane had been studied. The experimental data showed: the flexibility and shock resistance of algin membrane can be improved by adding carboxymethyl soybean polysaccharides. Like algin the carboxymethyl soybean polysaccharides could be dissolved in bowel succus and could inhibit the growth of Bacillus Cereus and Bacillus subtilis.

Objective To study the hygroscopicity of glucosamine sulfate powder.Methods Hygroscopic studies were conducted on glucosamine sulfate powder at 5℃ and 30℃ used gravimetric method,determined the equilibrium moisture content(EMC) and drew the moisture sorption isotherms.The experimental values were regressed using the BET model,calculated the monolayer moisture content.Results At 30℃,when water activity exceeded 0.43,samples agglomerated,browned and lose adsorbed water,EMC declined;At 5℃,the isotherm had typical ob-S shape,the EMC increased with water activity raising.At 30℃ and 5℃,the monolayer moisture content were 4.8633,5.5740g/100g respectively.Conclusion At 5,30℃ the appropriate aw for storage appeared to be below 0.3056,0.2784,respectively.