Fig. 5From: Effect of Surface Functionalization on the Cellular Uptake and Toxicity of Nanozeolite AViability (NR assay) of HEK-293 cells treated with different concentrations of unmodified and modified BaA nanozeolites for 24 h (a), 48 h (b), or 72 h (c). Data are expressed as a percent of control, mean ± SD from three independent experiments (asterisk denotes statistically significant difference from unexposed control, p < 0.05)Back to article page