Basic study of remote disinfection and sterilization effect by using atmospheric microplasma

Shimizu, Kazuo; Blajan, Marius; Tatematsu, Shigeki

doi:10.1109/ias.2011.6074269

Cited by 4 publications

(6 citation statements)

References 24 publications

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“…The bactericidal effect of the electric field was also not considered, even though the bacterial fluid was not allowed to completely dry off before microplasma treatment and the distance between the electrode and samples was maintained at 2 mm. In this situation, the main functional species of atmospheric pressure plasma sterilization were the chemical substances produced by the plasma [ 20 , 21 , 22 , 23 , 24 ]. After 48 h of incubation, the mannitol salt agar changed color from red to yellow; this was because of sugar fermentation caused by S. aureus .…”

Section: Resultsmentioning

confidence: 99%

“…Dielectric barrier discharge (DBD) atmospheric microplasma [ 19 ], [ 22 , 23 ] (see Figure 4 a) was generated at a discharge voltage of 900 V using an alternating current (AC) power supply at a frequency of 27 kHz. The electrode was gold plated with a diameter of 30 mm, a back layer of 50 µm, and a gap distance (interval between HV and ground) of 25 µm.…”

Section: Methodsmentioning

confidence: 99%

“…Multiple research results [ 20 , 21 , 22 , 23 , 24 ] have revealed that the reactive species generated by the plasma play the most important role in the plasma sterilization process. Multiple kinds of active species are considered to enhance the antimicrobial effects of plasma in general; they include various types of electrons, ions, radicals, UV light, electric fields, and metastable [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Direct and Indirect Bactericidal Effects of Cold Atmospheric-Pressure Microplasma and Plasma Jet

et al. 2021

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The direct and indirect bactericidal effects of dielectric barrier discharge (DBD) cold atmospheric-pressure microplasma in an air and plasma jet generated in an argon-oxygen gas mixture was investigated on Staphylococcus aureus and Cutibacterium acnes. An AC power supply was used to generate plasma at relatively low discharge voltages (0.9–2.4 kV) and frequency (27–30 kHz). Cultured bacteria were cultivated at a serial dilution of 10−5, then exposed to direct microplasma treatment and indirect treatment through plasma-activated water (PAW). The obtained results revealed that these methods of bacterial inactivation showed a 2 and 1 log reduction in the number of survived CFU/mL with direct treatment being the most effective means of treatment at just 3 min using air. UV–Vis spectroscopy confirmed that an increase in treatment time at 1.2% O2, 98.8% Ar caused a decrease in O2 concentration in the water as well as a decrease in absorbance of the peaks at 210 nm, which are attributed NO2− and NO3− concentration in the water, termed denitratification and denitritification in the treated water, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct and Indirect Bactericidal Effects of Cold Atmospheric-Pressure Microplasma and Plasma Jet

et al. 2021

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“…In general, the applications of electroporation can be divided into two categories [6]: industrial [3], [7]- [17] and medical [3], [18]- [20] applications.…”

Section: Introductionmentioning

confidence: 99%

High-Voltage Pulse Generators for Electroporation Applications: A Systematic Review

et al. 2022

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“…It is known that electrohydrodynamic (EHD) phenomenon occurred through the momentum transfer from ions accelerated by electric field to neutral molecules by collision [1][2][3][4][5][6][7][8][9]. Our study was carried out to investigate a micro scale plasma actuator energized at 1.4 kV [10][11][12][13][14][15][16][17][18]. Some researchers have investigated that the flow direction could be changed by altering the amplitude of the applied voltage [19,20].…”

Section: Introductionmentioning

confidence: 99%

Microplasma actuator for active flow control: Experiment and simulation

Shimizu

Mizuno²,

Ito³

et al. 2016

Proc. 14th Int. Conf. On Global Research and Education, Inter-Academia 2015

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Dielectric Barrier Discharge microplasma actuator energized at low discharge voltage at about 1.4 kV was applied for flow modification. Due to the microplasma generation, the flow velocity showed different characteristics at various duty ratios of the applied voltage. The observation with the high speed camera showed at various time intervals the modification of the flow due to the microplasma. The numerical simulation of the flow was carried out using Suzen model which is assuming that the electric potential of plasma actuator potential can be split in the potential due to the external electric field and potential due to the charge density of plasma.

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Basic study of remote disinfection and sterilization effect by using atmospheric microplasma

Cited by 4 publications

References 24 publications

Direct and Indirect Bactericidal Effects of Cold Atmospheric-Pressure Microplasma and Plasma Jet

Direct and Indirect Bactericidal Effects of Cold Atmospheric-Pressure Microplasma and Plasma Jet

High-Voltage Pulse Generators for Electroporation Applications: A Systematic Review

Microplasma actuator for active flow control: Experiment and simulation

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