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Swelling property and retain ability of CS/SF blend films with various blend ratios of chitosan : fibroin (CF) in PBS (pH 7.4) at 37°C for 24 h; (a) degree of swelling and (b) morphology. Each bar represents mean ± standard error (n = 3). One-way ANOVA showed a significant difference in degree of swelling among groups (*P < 0.05).
