Viability of rat muscle-derived stem cells (rMDSCs) grown on SN and glass at 1, 5, and 9 days, measured by MTT assay. Cytotoxicity of substrates was analyzed by one-way ANOVA with Bonferroni’s multiple comparison (* p < 0.05, ** p < 0.01, *** p < 0.005, ‡
p < 0.001).