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Exposure media affect nanotoxicity. (A) The effects of four concentrations of MWNT-15-20 with and without tannic acid (TA) on animal fitness. Sample size was n > 6 wells for each condition. (B) Toxic effect of TA on animal fitness. Sample size was n = 8 wells for each condition. * p < 0.05; ** p < 0.01; *** p < 0.001; p value, Student's t-test. (C) Comparison of body length between aqueous and solid medium exposure. Bars and error bars stand for mean and 95% confidence intervals.
