FIGURE 4.

Quantification of viability of HepG2 cells following exposure to cold atmospheric plasma (CAP)-treated pepper mild mottle virus (PMMoV)-free samples. Influence of 5-min and 3-min CAP-treated PMMoV-free samples on viability of HepG2 cells after 2 h (A) and 24 h (B), expressed as proportions (%) of PMMoV-free-NC (i.e., untreated PMMoV-free sample) in growth medium (1:2). NC, negative control (phosphate buffered saline: growth medium, 1:2); PC, positive control: H₂O₂ (100 μg mL^–1) for the 2 h time point, and etoposide (50 μg mL^–1) for the 24 h time point; ****p < 0.0001 (ANOVA and Dunnett’s multiple comparison tests).