Decontamination of Teeth and Plastic Surfaces from Biofilms and Spores with DC and Pulsed Corona in Air
Šipoldová Z., Machala Z., Tarabová K., Hensel K.
4th International Conference on Plasma Medicine ICPM-4, Orléans (France), June 17-21, 64 (2012)
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Abstract: Bio-decontamination and chemical effects induced by plasma in water upon electro-spraying through cold atmospheric pressure plasma of DC-driven positive transient spark discharge in air were investigated. Inactivation of Escherichia coli in plasma treated water was determined in dependence on the solution pH (controlled by buffers) and correlated with chemical changes induced in water. Productions of H2O2, nitrites, nitrates, peroxynitrites and pH changes were determined. The degree of inactivation and oxidative damage of bacteria increased with increasing acidity of the solution. Acidified nitrites interacting with H2O2 were determined as the most important bactericidal ROS/RNS agents in water treated by air plasma.
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