Micro-Biocidal Activity of Yeast Cells by Needle Plasma Irradiation at Atmospheric Pressure

Abstract

In this study, we report on the biocidal activity technique by needle helium plasma irradiation at atmospheric pressure using borosilicate capillary nozzle to apply for the oral surgery. The diameter of needle plasma was less than 50 m, and temperature of plasma irradiated area was less than body temperature. Needle plasma showed emission due to OH and O radical. Raman spectra and methylene blue stain showed yeast cells were inactivated by needle plasma irradiation.

Micro-Inactivation of Coliforms by Low-Temperature and Atmospheric-Pressure Plasma Irradiation

“…So far, we had generated micro-LA plasma (diameter: less than 50 µm) using a micro capillary nozzle to apply the oral surgery (i.e., sterilization of biofilms at periodontal pocket, and removing the dental plaque in embrasure etc.) [9]. Features of our LA plasma were ultra violet light, which can injure the oral tissue was decreased, temperature of this LA plasma irradiated area was similar to body temperature, and it can pinpoint irradiate to complex microstructure at oral tissues.…”