Figure 4

Free radical after giving softjet plasma treatment within cell media. (a,b) H2O2 level estimation using air and N2 cold plasma; (c,d) nitric oxide level estimation using air and N2 cold plasma. Student’s t-tests were performed, and the levels of significance are indicated as follows: *p < 0.05; **p < 0.01; and ***p < 0.001.