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Catalase prevents the toxicity of PAP. (a) CAL27 cells were incubated for 1 h in PAP alone or PAP with catalase. Catalase was added after plasma treatment. Cell viability was monitored 24 h post-treatment. (b) Concentration of H2O2 in PAP as a function of the time elapsed after the addition of catalase. The data are the mean ± SD of 3 to 6 independent experiments.
