Fig. 2From: Dual growth factor-modified microspheres nesting human-derived umbilical cord mesenchymal stem cells for bone regenerationa XPS of pDA/nHA/PLGA-GF, pDA/nHA/PLGA, and nHA/PLGA. b N1s XPS scan of pDA/nHA/PLGA-GF, pDA/nHA/PLGA, and nHA/PLGA. c C1s XPS scan of pDA/nHA/PLGA-GF, pDA/nHA/PLGA, and nHA/PLGA. d Adhesion rate of growth factors mediated by pDA coating on the surface of nHA/PLGA composite microcarriers. p < 0.05, n = 3Back to article page