| abstract |
PURPOSE: To obtain a chitosan having low molecular weight, narrow molecular weight distribution and uniform quality, by contacting an aqueous solution of a chitosan with a specific enzyme, thereby effecting the decomposition reaction of chitosan. n CONSTITUTION: A chitosan produced by the deacetylation of natural chitin is dissolved in water and is decomposed by contacting with one or more enzymes selected from papain, cellulase and acidic protease. The decomposition reaction is preferably carried out at 4W5pH and 40W60°C. n COPYRIGHT: (C)1988,JPO&Japio |