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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Toxicol In Vitro. 2017 May 5;42:292–298. doi: 10.1016/j.tiv.2017.04.027

Fig. 2.

Fig. 2

Cell viability curve of A549 cells was evaluated after 24 hour exposure to pristine MWCNTs, OH-MWCNTs and COOH-MWCNTs with concentrations from 1 to 1000 μg/ml. Viability was detected by using WST-1 assay. Data are represented as mean ± SD of triplicate. * p < 0.05, **p < 0.01.