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Chitosan films were prepared by several methods of casting from solution. Chitosan salts from formic acid, acetic acid and butyric acid were observed in the as-cast films from the each aqueous solution of chitosan salts. The unit cell parameters of crystals formed in each chitosan film were determined by the use of wide-angle x-ray diffraction.doi:10.2115/fiber.40.7_t246 fatcat:s2pt6rxkzzcfjnpyb2nstugmlm