Bacillus subtilis devitalization mechanism of atmosphere pressure plasma jet

Deng, Shaopo; Cheng, Cheng; Ni, Guohua; Meng, Yue; Chen, Hua

doi:10.1016/j.cap.2010.02.004

Cited by 36 publications

(35 citation statements)

References 19 publications

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“…Niemira (2012b) found that air is more effective than N 2 for the inactivation of E. coli O157:H7 and Salmonella isolates on almonds. Several studies also demonstrated that the addition of O 2 to nitrogen plasma enhanced sterilization efficacies for bacteria (Deng et al, 2010;Sureshkumar et al, 2010;Kim et al, 2011). Deng et al (2010) found that the addition of 3.59% O 2 to argon plasma generated ozone and increased the intensity of oxygen radicals based on optical emission spectrum.…”

Section: Discussionmentioning

confidence: 97%

“…Several studies also demonstrated that the addition of O 2 to nitrogen plasma enhanced sterilization efficacies for bacteria (Deng et al, 2010;Sureshkumar et al, 2010;Kim et al, 2011). Deng et al (2010) found that the addition of 3.59% O 2 to argon plasma generated ozone and increased the intensity of oxygen radicals based on optical emission spectrum. Sureshkumar et al (2010) found that the addition of 2% O 2 enhanced inactivation of Staphylococcus aureus compared to nitrogen gas alone through the emission of nitric oxide and other species.…”

Section: Discussionmentioning

confidence: 97%

“…In air plasma, electrical energydriven collisions between air and electrons generate reactive chemical species through electron impact excitation and dissociation (Laroussi, 2009). The reactive species generated include atomic oxygen (O), singlet oxygen ( 1 O 2 ), hydrogen peroxide (H 2 O 2 ), ozone (O 3 ), hydroxyl radicals (OH), and nitric oxide (NO) (Laroussi, 2009;Deng et al, 2010;Joshi et al, 2011). Based on these studies, it is assumed that ozone, oxygen radicals, and NO in air plasma may be major contributors to the enhanced inactivation and severe destruction of C. jejuni cells.…”

Section: Discussionmentioning

confidence: 99%

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Inactivation ofCampylobacter jejuniwith Dielectric Barrier Discharge Plasma Using Air and Nitrogen Gases

KimJoo-Sung

LeeEun-Jung

KimYun-Ji

2014

Foodborne Pathogens and Disease

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Air and nitrogen gas are commonly used feed gases for plasma generation and are economically useful in industrial applications. The two gases were compared in dielectric barrier discharge plasma for the inactivation of Campylobacter jejuni on an agar surface. Plasma treatment with nitrogen gas for 20 s did not yield any reduction (p>0.05) in viable cell count. However, a 0.8-log reduction (p<0.05) in colony-forming units (CFU) occurred when the nitrogen gas was supplemented with 2% (vol/vol) air. The use of air only, air supplemented with 2% (vol/vol) nitrogen, or oxygen only further decreased the viable cell counts by 0.7-1.7-log CFU (p<0.05). These results suggest that oxygen in plasma generation is critically important for the increased inactivation effect. Scanning electron microscopy analysis showed much cell debris including fragmented flagella in the sample exposed to air plasma, while no cell debris was found in the sample exposed to nitrogen plasma. In transmission electron microscopy analysis, many C. jejuni cells exposed to air plasma had truncated flagella with sharp bends, while the cells exposed to nitrogen plasma were normal, strongly suggesting that the air plasma can reduce the virulence of C. jejuni. A BacLight assay showed that air plasma damaged the cellular membrane (p<0.05), whereas nitrogen plasma did not after 5- or 20-s treatment. The damage to the membrane was consistent with the reduced viable cell count. Based on confocal microscopic analysis, the similar results were found by visualizing the fluorescent-dye-stained cells. In addition, the prolonged nitrogen plasma for 2 min also damaged many cellular membranes. This study shows that air, especially oxygen, is more effective and destructive than nitrogen and provides evidence that membrane damage may be a major mechanism for the inactivation of C. jejuni exposed to plasma.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

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Inactivation ofCampylobacter jejuniwith Dielectric Barrier Discharge Plasma Using Air and Nitrogen Gases

KimJoo-Sung

LeeEun-Jung

KimYun-Ji

2014

Foodborne Pathogens and Disease

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“…In this study, the pure argon and the combination of argon and oxygen were used for plasma generation. The OES results (Figure ) and ANOVA results (Table ) and Figure c,e,f show that by adding oxygen to argon, the bacterial deactivation ability of the system increases (Deng et al, ; Gurol et al, ; Li, Sakai, Watanabe, Hotta, & Wachi, ; Uhm, Lim, & Li, ). Adding 2.14% oxygen to argon led to a change in the time of the reduction by five cycles of E. coli bacteria from 5 min to 30 s (Huang et al, ).…”

Section: Resultsmentioning

confidence: 99%

The effect of atmospheric pressure cold plasma on the inactivation ofEscherichia coliin sour cherry juice and its qualitative properties

Hosseini

Rostami

Samani

et al. 2020

Food Science & Nutrition

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One of the nonthermal methods is the atmospheric pressure cold plasma (APCP). In this study, the effect of cold plasma on the reduction of Escherichia coli bacteria and qualitative properties of sour cherry juice, including total phenolic content (TPC), total anthocyanin content (TAC), and vitamin C, were investigated. Independent variables included plasma exposure time (1, 5, and 9 min), applied field intensity (25, 37.5, and 50 kV/cm), feeding gas oxygen content (0%, 0.5%, and 1%), and sample depth (0.5, 1, and 1.5 cm). The results show that increased oxygen content in argon has the greatest effect on the reduction of bacteria, and plasma exposure decreased 6 logarithmic periods of E. coli bacteria in sour cherry juice. Optimization results showed when all bacteria were eliminated by plasma, TPC remained unchanged, and TAC and vitamin C decreased by 4% and 21%, respectively, while thermal methods increased TPC by 23% and decreased TAC and vitamin C by 26% and 77%, respectively. These results indicate that, compared with conventional thermal methods, sour cherry juice pasteurization using APCP has little effect on the juice qualitative properties, and this method can serve as a suitable alternative to conventional thermal methods.

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“…Anti-microbial properties of plasmas in the case of decontamination of water, ambient air and surfaces were previously widely proven [1][2][3][4][5][6][7][8]. To protect crops and food from the bactericidal, fungal and viral infections usage of ozone was investigated by many research groups.…”

Section: Introductionmentioning

confidence: 99%

Solar energy for soil conditioning

Pawłat

Diatczyk

Komarzyniec

et al. 2011

2011 IEEE EUROCON - International Conference on Computer as a Tool

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Constant increase of energy consumption by growing population and shortening of natural resources will impose greater limitations of electric energy consumption by various treatment technologies. Shifting from large-scale treatment facilities powered from conventional sources to autonomic, small, and medium size installations supplied from renewables is one of the possible solutions. Results of ozone soil treatment are presented. PV panels supplied, on-site installation for soil treatment is proposed.

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Bacillus subtilis devitalization mechanism of atmosphere pressure plasma jet

Cited by 36 publications

References 19 publications

Inactivation ofCampylobacter jejuniwith Dielectric Barrier Discharge Plasma Using Air and Nitrogen Gases

Inactivation ofCampylobacter jejuniwith Dielectric Barrier Discharge Plasma Using Air and Nitrogen Gases

The effect of atmospheric pressure cold plasma on the inactivation ofEscherichia coliin sour cherry juice and its qualitative properties

Solar energy for soil conditioning

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