Fig. 1From: Cellular infiltration in an injectable sulfated cellulose nanocrystal hydrogel and efficient angiogenesis by VEGF loadinga Desulfation process and chemical unit structures of CNC-S and CNC-DS. b FT-IR and (c) XPS spectra of CNC-S and CNC-DS. d The morphologies of CNC-S and CNC-DS particles observed by TEMBack to article page