Proliferation and differentiation of hFOB cultured on SF/CS nanofibers with different CS contents (n = 5). (A) Relative cell number determined by MTS assays with cell number at day 0 taken as one for each group, (B) alkaline phosphatase [ALP] activities, (C) absolute cell number determined by MTS assays, and (D) ALP activities normalized to cell number. *p < 0.05.
Chen et al. Nanoscale Research Letters 2012 7:170 doi:10.1186/1556-276X-7-170