Biological Effects of DC Discharges in Atmospheric Air with Water
Machala Z., Jedlovský I., Hensel K., Martišovitš V., Foltin V.
10th International Symposium on High Pressure Low Temperature Plasma Chemistry HAKONE X, Saga (Japan), September 4-8, 41-46 (2006)
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Abstrakt: We tested biological effects of three types of DC electrical discharges in
atmospheric air with one electrode submerged in water. The studied discharges were streamer corona, transient spark and glow discharge, operating in non-homogeneous electric field in the point-to-plane configuration, in both polarities of DC high voltage applied. They generate nonthermal plasmas with various gas temperatures and levels of thermal non-equilibrium. The discharge properties were investigated by means of electrical measurements and optical emission spectroscopy. Their biological effects were tested on selected Gram-negative and Gram-positive
bacteria cultures (S. typhimurium and B. subtilis). The comparison of the effects of the three discharges indicates the major role of radicals and active species among other inactivation mechanisms.
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