| 摘要 |
NEW MATERIAL:A compound expressed by formula I [R is -NH2, -NH2HX (X is inorganic or organic acid residue) or -NHCOCH3; n is 0-6]. USE:A food, food additive, cosmetic component, medicine, medical material, agricultural material, etc. PREPARATION:A chitosan oligosaccharide expressed by formula II (preferably obtained by decomposing chitosan with chitosanase which is an enzyme, produced by a microorganism belonging to the genus Bacillus, stable at pH 5-11 and having 2-8 polymerization degree) is reduced with hydrogen, preferably in the presence of Raney.nickel or ruthenium catalyst. |
