Fig. 2From: Bioactive glasses and electrospun composites that release cobalt to stimulate the HIF pathway for wound healing applicationsChange in glass structure after incubation in SBF for 21 d: (a) XRD and (b) FTIR. Filled circles (●) represent peaks relating to apatite and hollow squares (□) represent peaks relating to calcium carbonate. s = stretch, b = bendBack to article page