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. 2022 Jan 24;33(2):18. doi: 10.1007/s10856-022-06643-w

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Fig. 5 — SEM Images of pure chitosan and the bi-composite Ch/Col and Ch/HA membranes a, b Chitosan (Cs). c BC1. d BC2. e BC3. f BC4; insets are magnified regions of the matrix