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. 2022 Mar 24;10:875363. doi: 10.3389/fbioe.2022.875363

FIGURE 2.

FIGURE 2

Photo of a bioactive GelMA scaffold (A). Scanning electron microscope (SEM) image of 5% GelMA (B), 10% GelMA (C), and 15% GelMA (D) confirmed the highly porous nature of the hydrogel with interconnected pores. The pore shape were marked with arrow (bar = 100 μm). The compressive mechanical characteristics, such as stress strain curves, maximum strain (%), maximum stress (kPa), and Young’s modulus values of the GelMA scaffolds at various concentrations were assessed (n = 3) (E). Dynamic viscoelastic characteristics of different concentrations of GelMA scaffolds (F). Rheological property curves of different concentrations of GelMA scaffolds (G). Slow release of fluorescent macromolecular protein Rhodamine B in 0-8d hydrogel scaffold [(H,I), ix]. Release curve of BMP2 in scaffolds (n = 3) (I). ns indicates no significant differences; * indicates significant differences, p < 0.05; ** indicates highly significant differences, p < 0.01).