Figure 6From: Critical role of surface chemical modifications induced by length shortening on multi-walled carbon nanotubes-induced toxicity Viability of macrophages exposed to S- and L-CNT. Quantification of cell viability using WST-1 assay in RAW 264.7 macrophages exposed to 0.1-50 μg/mL of S- or L-CNT for 6 (panel a) or 24 (panel b) hours. *: p<0.05 versus control condition. S-CNT: short CNT. L-CNT: long CNT.Back to article page