Rapid inactivation of <i>Penicillium digitatum</i> spores using high-density nonequilibrium atmospheric pressure plasma

Iseki, Sachiko; Ohta, Takayuki; Aomatsu, Akiyoshi; Ito, Masafumi; Kano, Hiroyuki; Higashijima, Yasuhiro; Hori, Masaru

doi:10.1063/1.3399265

Cited by 92 publications

(75 citation statements)

References 14 publications

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“…There are several works on spores deactivation by atmospheric pressure plasma. For example, Iseki et al [13] used plasma of argon gas, Lim et al [20] used Ar/O 2 plasma discharge and Uhm et al [27] utilized argon gas plasma for spore deactivation. Recently, Connolly et al [5] used Helium/air plasma at atmospheric pressure for antimicrobial efficacy against E.coli in a plastic package.…”

Section: Introductionmentioning

confidence: 99%

Inactivation of Aspergillus flavus spores in a sealed package by cold plasma streamers

et al. 2016

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The main objective of this study is to investigate the inactivation efficacy of cold streamers in a sealed package on pathogenic fungi Aspergillus flavus (A. flavus) spores that artificially contaminated pistachio surface. To produce penetrating cold streamers, electric power supply was adapted to deposit adequate power into the package. The plasma streamers were generated by an alternating high voltage with carrier frequency of 12.5 kHz which was suppressed by a modulated pulsed signal at frequency of 110 Hz. The plasma exposition time was varied from 8 to 18 min to show the effect of the plasma treatment on fungal clearance while the electrode and sample remained at room temperature. This proved a positive effect of the cold streamers treatment on fungal clearance. Benefits of deactivation of fungal spores by streamers inside the package include no heating, short treatment time and adaptability to existing processes. Given its ability to ensure the safety and longevity of food products, this technology has great potential for utilization in food packaging and processing industry. In this study, moisture and pH changes of pistachio samples after plasma streamers treatment were also investigated.

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Section: Introductionmentioning

confidence: 99%

Inactivation of Aspergillus flavus spores in a sealed package by cold plasma streamers

et al. 2016

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“…campestris disinfection Shiomi, 1992 . Plasma treatment has attracted a lot of attention as a method for inactivating microorganisms, especially as a substitute method for medical instrument sterilization Iseki et al, 2010 . In plasma discharge, a source gas is dissociated into various species such as electrons, ions, atoms, and radicals which interact with and inactivate the microorganism von Keudell et al, 2010 . However, in the field of agriculture there have been few reports concerning the inactivation effect of plasma on plant pathogens Iseki et al, 2010;Selcuk et al, 2008 .…”

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confidence: 99%

Seed Disinfection Effect of Atmospheric Pressure Plasma and Low Pressure Plasma on Rhizoctonia solani

et al. 2014

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Gas plasma generated and applied under two different systems, atmospheric pressure plasma and low pressure plasma, was used to investigate the inactivation efficacy on the seedborne pathogenic fungus, Rhizoctonia solani, which had been artificially introduced to brassicaceous seeds. Treatment with atmospheric plasma for 10 min markedly reduced the R. solani survival rate from 100% to 3% but delayed seed germination. The low pressure plasma treatment reduced the fungal survival rate from 83% to 1.7% after 10 min and the inactivation effect was dependent on the treatment time. The seed germination rate after treatment with the low pressure plasma was not significantly different from that of untreated seeds. The air temperature around the seeds in the low pressure system was lower than that of the atmospheric system. These results suggested that gas plasma treatment under low pressure could be effective in disinfecting the seeds without damaging them.

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“…Especially, O radical was confirmed from optical emission of plasma generated by APDBD. An atomic oxygen radical was effective to inactive P. digitatum spores in an atmospheric pressure plasma [14]- [16]. Also UV-C radiation, which was reported as a dominant for the inactivation of P. digitatum [17], was confirmed from plasma.…”

Section: Experimental Methodsmentioning

confidence: 71%

Direct Plasma Disinfection of Green Mold Spore on Citrus by Atmospheric Pressure Dielectric Barrier Discharge for Agricultural Applications

Yagyu

Hatayama

Hayashi

et al. 2016

Trans. Mat. Res. Soc. Japan

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Disinfecting effect on plasma generated by an atmospheric pressure dielectric barrier discharge, APDBD, was investigated to inactivate green mold spore, Penicillium digitatum, surviving on citrus fruit in an open environment. Aluminium electrode covered by dielectric silicon sheet from 0.05 mm to 5.0 mm in thickness was prepared as APDBD electrode, and plasma was generated on the surface of Citrus unshiu. As an optical emission of plasma, N 2 second positive band indicates high intensity, and also O radical at 777 nm were observed as a dominant for the inactivation of P. digitatum spore. The green mold spore was inactivated sufficiently by APDBD plasma exposure in a few seconds without any damage on the surface of citrus, though thermal damage of citrus surface occurs when surface temperature increased over 65 degrees C after tens of seconds in irradiation period.

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Rapid inactivation of Penicillium digitatum spores using high-density nonequilibrium atmospheric pressure plasma

Cited by 92 publications

References 14 publications

Inactivation of Aspergillus flavus spores in a sealed package by cold plasma streamers

Inactivation of Aspergillus flavus spores in a sealed package by cold plasma streamers

Seed Disinfection Effect of Atmospheric Pressure Plasma and Low Pressure Plasma on Rhizoctonia solani

Direct Plasma Disinfection of Green Mold Spore on Citrus by Atmospheric Pressure Dielectric Barrier Discharge for Agricultural Applications

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