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Plasma Medicine

年間 4 号発行

ISSN 印刷: 1947-5764

ISSN オンライン: 1947-5772

SJR: 0.216 SNIP: 0.263 CiteScore™:: 1.4 H-Index: 24

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Indirect Inactivation of Candida guilliermondii by Using a Plasma Synthetic Jet Actuator: Effect of Advected Charged Particles

巻 8, 発行 3, 2018, pp. 255-268
DOI: 10.1615/PlasmaMed.2018028140
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要約

Plasma synthetic jet actuators (PSJAs) demonstrated their ability to produce a tubular flow normal to the surface where the dielectric barrier discharge (DBD) is ignited. These fluid dynamics actuators enhance the delivery of reactive and charged species toward the target to be treated. In this work, the efficacy of an octagonal PSJA used to indirectly treat Candida guilliermondii, both in agar substrate and in saline solution, was experimentally studied. The inactivation effect of free charges advected by the induced flow has been investigated as well by interposing a metallic mesh between the actuator surface and the treated sample. Therefore, the passage of charges and their migration toward the sample can either be allowed or prevented simply by having the mesh floating or connected to the ground, respectively. A 4 log and a 2 log colony-forming unit (CFU) reduction were observed for agar substrate and saline solution, respectively, at the highest energy dose treatment with the grid grounded. Under the same conditions but with the grid at floating potential, the presence of advected charges gives an additional 1 log CFU. In addition to biological tests, chemical analyses have been carried out to identify the most important modifications produced by the induced flow into treated water. Results presented in this work demonstrate the efficacy of PSJAs in indirect treatment of C. guilliermondii, both on agar substrate and saline solution, and the inactivation properties of free charges advected by this type of fluid dynamics actuator.

によって引用された
  1. Ricchiuto A.C., Borghi C.A., Cristofolini A., Neretti G., Measurement of the charge distribution deposited on a target surface by an annular plasma synthetic jet actuator: Influence of humidity and electric field, Journal of Electrostatics, 107, 2020. Crossref

  2. Ricchiuto Anna Chiara, Borghi Carlo Angelo, Cristofolini Andrea, Neretti Gabriele, Atmospheric‐pressure plasma actuators: Enhancement of the free charges' transport mechanism, Plasma Processes and Polymers, 18, 4, 2021. Crossref

  3. Seri P., Cristofolini A., Neretti G., Effect of nanofillers on surface charge mobility and alternative technique for electrostatic field measurement, 2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2020. Crossref

  4. Khomich Vladislav Yu, Rebrov Igor E, Voevodin Vadim V, Yamshchikov Vladimir A, Zharkov Yaroslav E, Spatio-temporal evolution of ion current extracted from pulsed dielectric barrier discharge, Journal of Physics D: Applied Physics, 55, 27, 2022. Crossref

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