Fig. 1.
Chemical structure of chitosan. DDA is the degree of deacetylation of chitosan. 1D, 2D, 3D, 4D, 5D, 6D correspond to the 2-amino-2-deoxy-d-glucopyranose in NMR and 1A, 2A, 3A, 4A, 5A, 6A and Ac to the 2-acetamido-2-deoxy-d-glucopyranose.
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