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physicochemical properties of the methacrylated gelatin (GelMA) hydrogel. (A) GelMA solution; (B) scanning electron microscope (SEM) image of the GelMA hydrogel; (C) 1H-MR spectra of GelMA and gelatin; (D) DMA analysis of GelMA hydrogel with frequency dependency; (E) shear thinning of GelMA solution; (F) the viscosity of GelMA solution from 40°C to 10°C.
