Fig. 3. Effects of the CMC/nHA/GO scaffold on cell adhension and proliferation. (a) Growth and morphology of hADSCs on the CMC, CMC/GO and CMC/nHA/GO scaffolds detected by SEM at low (Mag = 1000, scale bars: 100 μm) and high (Mag = 5000, scale bars: 30 μm) magnification; (b) adhesion rate of hADSCs on substrates for 8 h normalized to the CMC 1 h; (c) proliferation of hADSCs on substrates for 72 h; (d) Ki-67 immunofluorescence staining of cells on substrates for 3 d (scale bars: 20 μm); (e) positive cell ratios of Ki-67 were determined by dividing the number of immune-positive cells to the number of nuclei stained with Hoechst (*P < 0.05, **P < 0.01, ***P < 0.001).