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. 2020 Dec 22;8:611796. doi: 10.3389/fbioe.2020.611796

Figure 2.

Figure 2

Mechanical properties of composite hydrogel. (A) SEM images of GelMA hydrogels, showing the effect of the degree of methacryloyl substitution on the ore sizes of GelMA hydrogels.; (B) three different degree of methacryloyl substitution of GelMA/collagen hydrogels were fabricated and collagen content was varied from 0 to 5 mg/ml, Despite variations in collagen content, under the same DS of GelMA, the stiffness of composite hydrogel was not significantly different. (C) Cell viability measured with different hydrogels, measured by MTT assay. (D) Schematic illustration of cell attachment on Composite hydrogel with different stiffness. (E) Morphology of C2C12 on 10% GelMA with different degree of substitution, I: L-G+C II: M-G+C III: H-G+C. N = 3 for each experiment. Error bars indicate the S.E.M of the data variation. Scale Bar, 100 μm.