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Comparison of fungicidal properties of non-thermal plasma produced by corona discharge and dielectric barrier discharge

J. Julák, H. Soušková, V. Scholtz, E. Kvasničková, D. Savická, V. Kříha,

. 2018 ; 63 (1) : 63-68. [pub] 20170617

Language English Country United States

Document type Comparative Study, Journal Article

Persistent link   https://www.medvik.cz/link/bmc18026879

The inactivation of four micromycete species by action of non-thermal plasma was followed. Two sources of plasma were compared, namely, positive corona discharge and dielectric barrier discharge. The corona discharge appeared as suitable for fungal spore inactivation in water suspension, whereas the barrier discharge inactivated spores on the surface of cultivation agar. Cladosporium sphaerospermum was the most sensitive, being inactivated within 10 min of exposure to plasma, whereas Aspergillus oryzae displayed decrease in viable cell count only, the complete inactivation was not achieved even after 40 min of exposure. Intermediate sensitivity was found for Alternaria sp. and Byssochlamys nivea. The significant delay of growth was observed for all fungi after exposure to sublethal dose of plasma, but we failed to express this effect quantitatively.

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$a The inactivation of four micromycete species by action of non-thermal plasma was followed. Two sources of plasma were compared, namely, positive corona discharge and dielectric barrier discharge. The corona discharge appeared as suitable for fungal spore inactivation in water suspension, whereas the barrier discharge inactivated spores on the surface of cultivation agar. Cladosporium sphaerospermum was the most sensitive, being inactivated within 10 min of exposure to plasma, whereas Aspergillus oryzae displayed decrease in viable cell count only, the complete inactivation was not achieved even after 40 min of exposure. Intermediate sensitivity was found for Alternaria sp. and Byssochlamys nivea. The significant delay of growth was observed for all fungi after exposure to sublethal dose of plasma, but we failed to express this effect quantitatively.
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$a Scholtz, Vladimír, $d 1977- $7 mzk2014820285 $u Department of Physics and Measurements, Faculty of Chemical Engineering, University of Chemistry and Technology in Prague, 166 28, Prague, Czech Republic.
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$a Kvasničková, E $u Department of Physics and Measurements, Faculty of Chemical Engineering, University of Chemistry and Technology in Prague, 166 28, Prague, Czech Republic.
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$a Savická, D $u Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, 166 28, Prague, Czech Republic.
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$a Kříha, V $u Department of Physics, Czech Technical University in Prague, 166 27, Prague, Czech Republic.
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