Fig. 6

The change of H₂O₂ concentration according to NCP-PAM treatment with and without SK-N-SH cells. A. In the presence of SK-N-SH cells, NCP was treated with PAM for plasma non-treat, 1 min, 3 min, and 5 min and cultured for 0 h (immediately after treatment), 2 h, 4 h, and 6 h. Afterward, the concentration of H₂O₂ was confirmed. B. In the absence of SK-N-SH cells, NCP was treated with plasma non-treat, 1 min, 3 min, and 5 min in the medium for 0 h (immediately after treatment), 2 h, 4 h, and 6 h. Afterward, the concentration of H₂O₂ was confirmed. * p < 0.05, **  p < 0.01