The present investigation describes a novel method for preparing beads based on crosslinked chitosan with glutaraldehyde interpenetrating glycine polymer network. Four type of beads, viz., CHI1 (composed of chitosan, glycine and glutaraldehyde); CHI2 (composed of chitosan and glutaraldehyde); CHI3 (composed of chitosan and glycine) and CHI4 (only chitosan) were prepared and their release characteristics were studied using thyamine hydrochloride (Thy-HCl) as a model drug. Structural changes during swelling of CHI1 beads in solutions of different pH were studied using IR and UV spectroscopy.
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Gupta et al. (1999) studied this question.
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