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A series of water-soluble chitosan-N-arginine (CS-N-Arg) with various degrees of substitution (DSs) from 8.7 to 28.4% was synthesized by reacting amino groups of chitosan with arginine. The chemical structures and physical properties of CS-N-Arg were characterized by Fourier-transform infrared, magnetic resonance spectra, elemental analysis and X-ray diffraction as well as thermogravimetric analysis...
Water-soluble N-(4-carboxybutyroyl) chitosan derivatives with different degrees of substitution (DS) were synthesized to enhance the antimicrobial activity of chitosan molecule against plant pathogens. Chitosan in a solution of 2% aqueous acetic acid–methanol (1:1, v/v) was reacted with 0.1, 0.3, 0.6 and 1mol of glutaric anhydride to give N-(4-carboxybutyroyl) chitosans at DS of 0.10, 0.25, 0.48 and...
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