Figure 2.

Influence of the cell culture medium on the direct and indirect plasma treatment of two cancer cell lines. (a) The direct plasma treatment was performed for 10 s, with a frequency of 500 Hz and a gap of 1 mm. (b) The indirect treatment was performed for 7 min treatment, with a gas flow rate of 3 slm and a gap of 10 mm. Data are represented as mean ± standard deviation (SD) of three independent experiments with at least two replicates. Statistical significance of all treatment conditions was compared to untreated. *p < 0.05, **p < 0.01, and ***p < 0.005 (one-way ANOVA).