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Alizarin red S staining for calcium deposition by human adipose-derived stem cells cultured on Ti surfaces for 21 days; macroscopic observation and results of quantitative analysis normalized to protein content.
Notes: *P<0.005. 80 nm, nano-TiO2 with pores ~80 nm; 108 nm, nano-TiO2 with pores ~108 nm.
Abbreviations: S, untreated Ti sample; W, electropolished Ti.
