Fig. 4From: Size-dependent cellular toxicity and uptake of commercial colloidal gold nanoparticles in DU-145 cellsCell cytotoxicity profiles of DU-145 cells in lag phase. a Cell viability of DU-145 in lag phase when treated with plain 20 nm GNPs and b cell viability of DU-145 in lag phase when treated with 200 nm GNPs. **p < 0.01, ***p < 0.001Back to article page