Fig. 7.
Effect of human serum incubated nanodiamonds at 50 μg ml−1 for 24 h on cell proliferation by BrdU immunoassay. P = PBS; S = Serum; T = TiO2 NP; 6, 60, 100, 250, 500 are sizes of nanodiamonds in nm. *P < 0.05 vs. corresponding serum-only (S) or PBS (P) control.