Figure 3From: Carbon black nanoparticles induce type II epithelial cells to release chemotaxins for alveolar macrophagesThe chemotactic effect of conditioned medium from L-2 cells exposed to varying doses of TNFα compared with TNFα alone. Asterisks denote a significant change from the cell free TNFα treatment (* p < 0.05). Graph shows the result of one experiment with three replicates.Back to article page