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dc.contributor.authorBenabbas, Mohamed Tahar
dc.contributor.authorSahli, Salah
dc.date.accessioned2018-11-07T19:29:30Z
dc.date.available2018-11-07T19:29:30Z
dc.date.issued2018-06-26
dc.identifier.urihttp://hdl.handle.net/123456789/136418
dc.description.abstractAn atmospheric pressure plasma jet generation system for biomedical applications consisting of an alternating high voltage generator and a dielectric barrier discharge (DBD) based cylindrical reactor has been realized in the framework of this thesis. In order to determine the optimal parameters for the plasma jet generation by an AC or pulsed excitation and to ensure maximum exploitation of this latter, we carried out a series of electrical and optical measurements. The effects of the variation of the nature of the excitation signal, the applied voltage amplitude and frequency on the geometry of the jet and the reactive species created in air by this plasma jet were studied. First, we used our plasma jet created in using argon at atmospheric pressure for the inactivation of Escherichia coli bacterium spread on a solid surface. We have shown that the inactivation capacity of microorganisms by this plasma jet is directly related to the distance jet source – treated surface as well as to the duration of the treatment. The inactivation rate is more significant as the jet source – sample distance is minimal and the treatment duration is high. Secondly, we treated deionized water contaminated with E-coli bacteria using our plasma jet. We have shown that this treatment allows the creation of ozone, hydrogen peroxide and nitrite. However, the concentrations of these species generated by the plasma jet remain relatively low in order to obtain an effective inactivation of Escherichia coli present in the same amount of deionized water. These investigations have shown that the composition and the dimensions of the created plasma jet can be controlled by means the nature of the excitation signal, its amplitude and / or its frequency. They have also shown that our plasma jet is more effective for the treatment of solid surfaces than for the treatment of aqueous media.fr_FR
dc.language.isofrfr_FR
dc.publisherجامعة الإخوة منتوري قسنطينةfr_FR
dc.subjectJet de plasmafr_FR
dc.subjectexcitation ACfr_FR
dc.subjectexcitation impulsionnellefr_FR
dc.subjectespèces réactivesfr_FR
dc.subjectinactivationfr_FR
dc.subjectEscherichia colifr_FR
dc.subjecteau déminéraliséefr_FR
dc.subjectPlasma jetfr_FR
dc.subjectAC excitationfr_FR
dc.subjectpulsed excitationfr_FR
dc.subjectreactive speciesfr_FR
dc.subjectinactivationfr_FR
dc.subjectEscherichia colifr_FR
dc.subjectdeionized waterfr_FR
dc.subjectمنفث البلازماfr_FR
dc.subjectالعناصر الكميائية التفاعليةfr_FR
dc.subjectجهد كهربائي متناوبfr_FR
dc.subjectجهد كهربائي شكل نبضاتfr_FR
dc.subjectمركبات كميائيةfr_FR
dc.subjectتفاعلية تثبيطfr_FR
dc.subjectالإشريكية القولونيةfr_FR
dc.subjectمياه منزوعة المعادنfr_FR
dc.titleEtude et réalisation d’un jet de plasma pour applications dans le domaine biomédical.fr_FR
dc.typeThesisfr_FR


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