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ISSN Druckformat: 1947-5764
ISSN Online: 1947-5772
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Bactericidal Effect of a Dielectric Barrier Discharge Plasma Jet Generated in Laminar and Preturbulent Helium Flows
ABSTRAKT
The bactericidal effect of a helium dielectric barrier discharge plasma jet generated in laminar (at 3 m/s) and preturbulent (at 10 m/s) helium flows is considered in terms of average discharge power and distance of treatment of Escherichia coli cells grown on a nutrient agar surface in a Petri dish. Sizes of bacteria inhibition zones are estimated and morphological changes in ultrastructure of bacterial cells are revealed using electron microscopy. This study suggests that the gas flow regime is an important factor in the production of the helium plasma jet used to inhibit bacteria. We reveal the different responses of E. coli cells treated by the helium plasma jet generated in laminar and preturbulent gas flows. Numerous focal destructions appear in the cells after 2 min of treatment with the laminar gas flow regime. Along with these focal destructions, expansion of cytoplasm and a superhelix of nucleoids are revealed with the preturbulent regime. We explain differences in behavior of cell morphology under the plasma jet formed at different gas flow regimes by the different gas-dynamic conditions of mixing ambient air into the helium flow.
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Pinchuk M. E., Stepanova O. M., Astafiev A. M., Lazukin A. V., Chen Zhaoquan, Stepwise propagation of a guided streamer along a DBD helium plasma jet fed by biased oscillating voltage, Applied Physics Letters, 114, 19, 2019. Crossref
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Stepanova Olga, Pinchuk Mikhail, Astafiev Alexander, Chen Zhaoquan, A streamer behavior evolution during an applied voltage cycle in helium and argon atmospheric pressure plasma jets fed by DBD, Japanese Journal of Applied Physics, 59, SH, 2020. Crossref
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Pinchuk M. E., Stepanova O. M., Gromov M., Leys Ch., Nikiforov A., Variation in guided streamer propagation along a DBD plasma jet by tailoring the applied voltage waveform, Applied Physics Letters, 116, 16, 2020. Crossref
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Abdelaziz Ayman A., Kim Hyun‐Ha, Distinctive patterns and characteristics of neon jet launched from plasma candle device, Plasma Processes and Polymers, 18, 4, 2021. Crossref
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Aznabaev Ratmir, Astafiev Alexander, Pinchuk Michael, Snetov Vadim, Stepanova Olga, Electrical Diagnostics of Surface Dielectric-Barrier Discharge with Coaxial Configuration, 2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE), 2020. Crossref
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Pinchuk M. E., Chen Zhaoquan, Stepanova O. M., Transition from one-pass mode to stepwise propagation of a guided streamer along a helium plasma jet, Applied Physics Letters, 119, 5, 2021. Crossref
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Pinchuk Mikhail, Nikiforov Anton, Snetov Vadim, Chen Zhaoquan, Leys Christophe, Stepanova Olga, Role of charge accumulation in guided streamer evolution in helium DBD plasma jets, Scientific Reports, 11, 1, 2021. Crossref
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Aznabaev Ratmir A., Pinchuk Mikhail E., Stepanova Olga M., The Relevancy of Electrical Measurements to Determine Plasma Region Extension in a Coaxial SDBD Plasma Jet, IEEE Transactions on Plasma Science, 49, 9, 2021. Crossref
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Shershunova Ekaterina A., Moshkunov Sergey I., Khomich Vladislav Yu., Features of Pulsed Argon Plasma Jet Impinging on Grounded Target, IEEE Transactions on Plasma Science, 47, 11, 2019. Crossref
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Pinchuk M E, Lazukin A V, Stepanova O M, Gas temperature spatial distribution in air corona discharge with plane comb of metal rod electrodes derived from schlieren images, Journal of Physics: Conference Series, 1787, 1, 2021. Crossref
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Ivankov Anton, Capela Tony, Rueda Vanesa, Bru Eric, Piquet Hubert, Schitz Dmitry, Florez David, Diez Rafael, Experimental Study of a Nonthermal DBD-Driven Plasma Jet System Using Different Supply Methods, Plasma, 5, 1, 2022. Crossref