Bacterial sterilization by a dielectric barrier discharge (DBD) in air

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dc.contributor.authorKostov, K. G. [UNESP]
dc.contributor.authorRocha, V. [UNESP]
dc.contributor.authorKoga-Ito, C. Y. [UNESP]
dc.contributor.authorMatos, B. M. [UNESP]
dc.contributor.authorAlgatti, M. A. [UNESP]
dc.contributor.authorHonda, Roberto Yzumi [UNESP]
dc.contributor.authorKayama, M. E. [UNESP]
dc.contributor.authorMota, Rogério Pinto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:27:44Z
dc.date.available2014-05-20T13:27:44Z
dc.date.issued2010-06-25
dc.description.abstractCold atmospheric plasma treatment of microorganisms and living tissues has become a popular topic in modern plasma physics and in medical science. The plasma is capable of bacterial inactivation and noninflammatory tissue modification, which makes it an attractive tool for treatment of skin diseases, open injuries and dental caries. Because of their enhanced plasma chemistry, Dielectric Barrier Discharges (DBDs) have been widely investigated for some emerging applications such as biological and chemical decontamination of media at ambient conditions. Despite the high breakdown voltage in air at atmospheric pressure, the average current of DBD discharges is low. Therefore, a DBD can be applied in direct contact with biological objects without causing any damage. In this work a 60 Hz DBD reactor, which generates cold atmospheric plasma inside Petri dishes with bacterial culture, is investigated. Samples of Staphylococcus aureus, a Gram-positive bacterium and Escherichia coil a Gram-negative bacterium were selected for this study. The bacterial suspensions were evenly spread on agar media planted in Petri dishes. The reactor electrodes were placed outside the Petri dish, thus eliminating the risk of samples microbial contamination. The covered Petri dish with agar medium in it serves as dielectric barrier during the treatment. The plasma processing was conducted at same discharge power (similar to 1.0 W) with different exposure time. Sterilization of E. coil and S. aureus was achieved for less than 20 min. Plasma induced structural damages of bacteria were investigated by Scanning Electron Microscopy. (C) 2010 Elsevier B.V. All rights reserved.en
dc.description.affiliationSão Paulo State Univ, UNESP, FEG, BR-12516410 São Paulo, SP, Brazil
dc.description.affiliationSão Paulo State Univ, UNESP, Sao Jose Campos Dent Fac FO, BR-12245000 São Paulo, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, UNESP, FEG, BR-12516410 São Paulo, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, UNESP, Sao Jose Campos Dent Fac FO, BR-12245000 São Paulo, SP, Brazil
dc.format.extent2954-2959
dc.identifierhttp://dx.doi.org/10.1016/j.surfcoat.2010.01.052
dc.identifier.citationSurface & Coatings Technology. Lausanne: Elsevier B.V. Sa, v. 204, n. 18-19, p. 2954-2959, 2010.
dc.identifier.doi10.1016/j.surfcoat.2010.01.052
dc.identifier.issn0257-8972
dc.identifier.lattes6543563161403421
dc.identifier.orcid0000-0002-2416-2173
dc.identifier.urihttp://hdl.handle.net/11449/9180
dc.identifier.wosWOS:000279378600018
dc.language.isoeng
dc.publisherElsevier B.V. Sa
dc.relation.ispartofSurface & Coatings Technology
dc.relation.ispartofjcr2.906
dc.relation.ispartofsjr0,928
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectAtmospheric plasmaen
dc.subjectDielectric barrier dischargeen
dc.subjectPlasma sterilizationen
dc.subjectE. colien
dc.subjectS. aureusen
dc.titleBacterial sterilization by a dielectric barrier discharge (DBD) in airen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V. Sa
unesp.author.lattes6543563161403421[3]
unesp.author.orcid0000-0002-2416-2173[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, São José dos Campospt
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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