Bacterial inactivation by plasma treated water enhanced by reactive nitrogen species

Shaw, Priyanka; Kumar, Naresh; Kwak, Hyong Sin; Park, Ji Hoon; Uhm, Han S.; Bogaerts, Annemie; Choi, Eun Ha; Attri, Pankaj

doi:10.1038/s41598-018-29549-6

Cited by 106 publications

(71 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that the number of surviving E. coli was about 2 × 10 3 mL −1 after direct plasma treatment for 10 s and decreased to the colony counting method detection limit of 10 mL 1 after 30 s, showing a 6-log reduction in the concentration of bacteria. As shown in Figure 8, the bactericidal effect of treatment with AALCA was significantly higher than the bactericidal effect of treatment with NEAPRS and APPJ, corona, or DBD discharges reported elsewhere [9,43,[49][50][51][52][53][54][55][56]. It was confirmed by thermographic observation that the suspension was heated by irradiation to temperatures up to 38 • C, which is below the temperature harmful for E. coli reported elsewhere, suggesting that heating of the sample was not involved in the sterilization process [57].…”

Section: Inactivation Of E Colimentioning

confidence: 59%

“…Recently, treatment of liquids using various atmospheric pressure plasmas has attracted much attention owing to its wide range of possible applications, such as synthesis of nanocarbons and nanoparticles, sterilization of microorganisms, growth enhancement of plants, plasma farming, cancer therapy, and water purification [1][2][3][4][5][6][7][8][9][10][11][12][13]. Typically, low-temperature nonequilibrium atmospheric pressure plasma jets (NEAPPJs) or dielectric barrier discharges (DBDs) are used for activation of liquids by plasma [5,[12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

et al. 2019

View full text Add to dashboard Cite

In this work, we developed a portable device with low production and operation costs for generating an ambient air low-current arc (AALCA) that is transferred to the surface of a treated liquid. It was possible to generate a stable discharge, irrespective of the conductivity of the treated liquid, as a sequence of corona, repeating spark, and low-current arc discharges. The estimated concentration of reactive oxygen and nitrogen species (RONS) in plasma-treated water (PTW) produced using AALCA treatment was two orders of magnitude higher than that of PTW produced using conventional He nonequilibrium atmospheric pressure plasma jets or dielectric barrier discharges. The strong bactericidal effect of the treatment using AALCA and the water treated using AALCA was confirmed by survival tests of Escherichia coli. Further, the possibility of treating a continuous flow of liquid using AALCA was demonstrated.

show abstract

Section: Inactivation Of E Colimentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

et al. 2019

View full text Add to dashboard Cite

show abstract

“…In a recent study, Shaw et al. () produced plasma‐treated water using water vapor or HNO 3 vapor along with nitrogen. Water vapor in the feed gas produced higher amounts of OH and H 2 O 2 in water, whereas HNO 3 vapor produced more NO • along with H 2 O 2 .…”

Section: Ntp–liquid Interactionsmentioning

confidence: 99%

Nonthermal Plasma–Liquid Interactions in Food Processing: A Review

Perinban

Orsat

Raghavan

2019

Comp Rev Food Sci Food Safe

View full text Add to dashboard Cite

Nonthermal processing methods are often preferred over conventional food processing methods to ensure nutritional quality. Nonthermal plasma (NTP) is a new field of nonthermal processing technology and seeing increased interest for application in food preservation. In food applications of NTP, liquid interactions are the most prevalent. The NTP reactivity and product storability are altered during this interaction. The water activated by NTP (plasma‐activated water [PAW]) has gained considerable attention during recent years as a potential disinfectant in fruits and vegetable washing. However, detailed understanding of the interactions of NTP reactive species with food nutritional components in the presence of water and their stability in food is required to be explored to establish the potential of this emerging technology. Hence, the main objective of this review is to give a complete overview of existing NTP–liquid interactions. Further, their microbial inactivation mechanisms and the effects on food quality are discussed in detail. Most of the research findings have suggested the successful application of NTP and PAW for microbial inactivation and food preservation. Still, there are some research gaps identified and a complete analysis of the stability of plasma reactive species in food is still missing. By addressing these issues, along with the available research output in this field, it is possible that NTP can be successfully used as a food decontamination method in the near future.

show abstract

“…Tanaka et al also investigated the antitumor effects of plasma‐activated‐lactate (Ringer's solution) and showed that only the lactate in the solution contributes to its antitumor properties. Water activated by a plasma jet showed a correlation between the densities of aqueous reactive nitrogen species (RNS) and antibacterial effects …”

Section: Introductionmentioning

confidence: 99%

Helium plasma jet interactions with water in well plates

Mohades

Lietz

Kruszelnicki

et al. 2019

Plasma Processes & Polymers

View full text Add to dashboard Cite

Plasma activation of liquids or cell cultures is a method for investigating the consequences of plasma produced reactive oxygen and nitrogen species (RONS) on living systems. The reproducible transfer of RONS, ions, electrons, and photons to the liquid is critical for determining reaction mechanisms and biological outcomes, and depends strongly on system parameters. A common in vitro method of plasma treatment of cells is a plasma jet directed into a well plate filled (or partially filled) with a liquid cell growth media. This method of treatment intrinsically has several environmental and geometrical factors that could lead to variability in the activation of the media. Uncontrolled or unreported geometrical and environmental factors that affect this transfer can, therefore, influence the reproducibility of measurements. In this paper, results from a numerical modeling investigation of a pulsed helium plasma jet interacting with water in a well plate are discussed while varying the height of the well‐plate rim. The height of the rim changes gas flow patterns, the ratio of He‐to‐air, and the water vapor content in the gas layer above the liquid. With a low rim, gas flowing from the jet stagnates on‐axis and flows radially outward with few vortices that recirculate reactants. With high rims, the gas flow is dominated by vortices and recirculation. With a low rim, the ionization wave (IW) from the jet strikes the liquid and proceeds as a surface IW across the water. With higher rims, the densities of helium and water vapor are higher above the liquid, which results in a volumetric propagation of the IW, initially producing higher densities of H2, HO2, OH, and H2O2. The end result is that for otherwise identical conditions, the densities of solvated H2O2aq and select reactive nitrogen species increase with rim height due to the vortices that recirculate reactants.

show abstract

Bacterial inactivation by plasma treated water enhanced by reactive nitrogen species

Cited by 106 publications

References 42 publications

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

Nonthermal Plasma–Liquid Interactions in Food Processing: A Review

Helium plasma jet interactions with water in well plates

Contact Info

Product

Resources

About