An Improved Method for the Prepa- ration of Colloidal Chitin by using Methanesulfonic Acid
نویسندگان
چکیده
treatment with these acids may cause disorder to the stiff fibril structure of native chitin with a slight cleavage of glycosidic linkages, and afford enzymatically digestible colloidal chitins. The enzymic digestibility varies mainly with these acids used for its preparation. Wenow wish to report an improved method for the preparation ofcolloidal chitin by treatment with aqueous methanesulfonic acid, and a comparative analysis of its rate of hydrolysis by both chitinase and lysozyme with those of colloidal chitins prepared by using cone, hydrochloric acidu and aqueous sulfuric acid2) and with that of TV-acetylchitosan xerogel.4) Three kinds ofcolloidal chitin were prepared from crab shell chitin by treatment with methanesulfonic acid (colloidal chitin-MS), cone, hydrochloric acid (colloidal chitin-HC), and 56% aqueous sulfuric acid (colloidal chitin-SA). Chitin was able to dissolve within lOmin in 56% aqueous methanesulfonic acid, and within 3O~5O 2111
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