대기압 유전체 장벽 방전 저온 플라즈마 제트의 황색포도상구균 살균효과

Abstract

The aim of this study was to evaluate the sterilizing efficiency in accordance with atmospheric pressure dielectric barrier discharge plasma jet (APDBDPJ) treated times (60, 180, and 300 s) on S. aureus on the Titanium (Ti) surface. The home-made APDBDPJ system is composed of electrodes, AC power supply and working gas such as argon (Ar), nitrogen (N2) and oxygen (O2) gas. The plasma sterilization was carried out at a Ar gas flow-rate of 3 L/min, Ar (3 L/min) added N2 (30ml/min) or O2 gas (30ml/min), voltage of 6 kV, and frequency of 19 kHz. The distance of the between APDBDPJ head and Ti surface was set to 10 mm. The temperature of the APDBDPJ flame is nearby 32 ℃. After the APDBDPJ treatment, viability of the S. aureus is decreased. As a result, APDBDPJ treatment affects on cell membrane, and killed the bacteria. In addition, reduction in the number of bacterial is found that related to APDBDPJ treatment times. APDBDPJ is an effective tool that is attractive for clinical use and may assist in antimicrobial therapy.