Figure 4From: Different cellular response mechanisms contribute to the length-dependent cytotoxicity of multi-walled carbon nanotubesCell viability of RAW264.7 cells. Measured by (a) CellTiter-Blue assay and (b) trypan blue counting in response to different concentrations and incubation times of S- and L-MWCNTs. Cells were treated as described in the ‘Methods’ section, and data were expressed as mean ± standard errors. Experiments were performed for three times.Back to article page