Figure 8
From: No-ozone cold plasma can kill oral pathogenic microbes in H2O2-dependent and independent manner
The charged particles of NCP is critical for the NCP-mediated bactericidal in solid medium. (A) Upper panel The photographs showing the 3 different NCP treatment conditions. NCP-D.E represents the NCP treatment condition placing a dielectric mesh between the target and NCP device, and NCP-E.G. means a grounded electric meshes were placed during the treatment. Bottom panel: The photographs showing the bactericidal effect of NCP in 3 different treatment conditions. The distance between NCP device and the S.mutans inoculated on solid medium in all three treatment conditions were maintained as 1 cm. At 24 h after the 5 min of NCP treatment, the photographs were taken. (B) The effect of 3 different NCP treatment methods on H2O2 level in the liquid medium. 1 ml of liquid medium was treated with NCP for 5 min using 3 different treatment methods described in (A). Data shown are the average of three independent experiments, **< 0.01. (C). S.mutans inoculated on solid medium was subjected to NCP using two treatment methods. Fixed treatment means NCP device was fixed at the middle of the plate during 5 min of treatment as usual, whereas moving treatment means the NCP was treated in moving manner during 5 min on the circle sized in 3 cm in diameter, keeping 1 cm distance. The photoghraphs showing a clear zone were taken at 24 h after the NCP treatment.
