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Microbial Inactivation by Electric Discharge with Metallic Grid

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Scholtz V., Kvasničková E., Julák J.
Acta Physica Polonica A
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2013
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vol. 124
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issue 1
62-65
EN
The area of microbial inactivation by the low-temperature plasma produced by DC electric cometary discharge is increased by insertion of an electrically insulated metallic grid between the discharge and the target object. Gram-negative bacteria are almost fully inactivated; an additional zone of incomplete inactivation appears for Gram-positive bacteria and yeasts.
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The Influence of Parameters of Stabilized Corona Discharge on its Microbicidal Effect

100%
Scholtz V., Kommová L., Julák J.
Acta Physica Polonica A
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2011
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vol. 119
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issue 6
803-806
EN
This work presents the study of microbicidal effects of positive flashing corona, negative pulseless corona and glow corona discharges and the comparison of their efficiency in the point-to-plane arrangement in water suspension. The flashing corona seems to be the most effective one, however the interval of optimal parameters is wide. The total inhibition of microorganisms becomes after 75 s or 8-10 min of exposition for bacteria or yeast, respectively. A hypothesis explaining the different sensitivity of various microbes is postulated.
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