Fig. 1From: Preparation and characterization of propolis reinforced eggshell membrane/ GelMA composite hydrogel for biomedical applicationsCharacteristics of scaffolds. (a) 1Â H-NMR spectrum of GelMA: the methacrylation of gelatin was showed by dashed line in the spectrum of GelMA. (b) FT-IR spectra of fragmented ESM fibers (EMF), GelMA hydrogel (GM), GM/EMF hydrogel, GM/EMF/P hydrogel, and propolisBack to article page