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Characteristics of hydrogels. (a) Optical images of the various hydrogels under a compression experiment. (b) Quantitative mechanical properties of the molecular designed hydrogels measured by standard mechanical compression tests. (c) SEM images of the cross section of various freeze-dried hydrogels. Degradation properties of different hydrogels in PBS (d) without and (e) within collagenase (12.5 U mL−1). (f) Cumulative release of BMP-2 from BPDAH-GPEGD and BMP-GPEGD hydrogels.
