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. 2020 Dec 2;25(2):880–891. doi: 10.1111/jcmm.16141

FIGURE 1.

FIGURE 1

Characterization of GelMA hydrogels. (A) Schematic representation of GelMA hydrogel formation by the methacrylic anhydride and gelatin reaction. (B‐D) SEM images of GelMA hydrogel with three concentrations after freeze‐drying. (E) Average pore size of hydrogels. (F) Appearance of hydrogels at three concentrations. (G) Compression modulus of hydrogels at different concentrations. (H) Degradation of GelMA hydrogel at different concentrations in vitro. (I) In vitro appearance of hydrogel degradation at 2 h. (J) Swelling property of hydrogel. (K) WCA of hydrogel. (*P < .05, **P < .01)