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Morphological characterization and cumulative release curves of the composite hydrogels. (A) SEM images showing the morphology of the fracture surface in the control group and (B) 4% PAL group. (C) Cumulative release curves of BSA. The control group showed a high initial burst, while the 4% PAL group demonstrated slower release. The data suggest that a significant amount of BSA remained inside the 4% PAL group samples after 7 days.
