Effect of nitrogen addition to ozone generation characteristics by diffuse and filamentary dielectric barrier discharges at atmospheric pressure

Osawa, Naoki; Tsuji, T.; Ogiso, Ryota; Yoshioka, Yoshio

doi:10.1051/epjap/2017160471

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…However, RH levels were significantly ( P < 0.05) increased after the ACP treatment using 100% N 2 and 80% N 2 + 20% O 2 for both treatment times (Table 2), which might be due to a minor leak in the ACP‐treatment chamber. In short, the increase of reactive species concentrations observed in this study was due to the presence of oxygen molecules, energy density generated by ACP, and the contribution of RH (Abdelaziz et al., 2018; Abdelaziz et al., 2019; Mastanaiah et al., 2013; Osawa et al., 2017).…”

Section: Resultsmentioning

confidence: 64%

“…The 10 min of ACP treatment time significantly ( P < 0.05) increased the ozone concentration compared to its concentration after 5 min ACP treatment time when 100% N 2 used as a gas. The increase in ozone concentration was probably due to the presence of oxygen molecules provided to the reaction by increasing the RH level during the ACP treatment (Abdelaziz et al., 2019; Osawa et al., 2017). The RH levels inside the treatment chamber were significantly ( P < 0.05) reduced after injecting the 100% N 2 and 80% N 2 + 20% O 2 (Table 2).…”

Section: Resultsmentioning

confidence: 99%

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Reduction of T‐2 and HT‐2 mycotoxins by atmospheric cold plasma and its impact on quality changes and germination of wheat grains

Iqdiam

Feizollahi

Arif

et al. 2021

Journal of Food Science

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Wheat (Triticum aestivum) is susceptible to mycotoxin contamination, which can result in significant health risks and economic losses. This research examined the ability of air atmospheric cold plasma (air-ACP) treatment to reduce pure and spiked T-2 and HT-2 mycotoxins' concentration on wheat grains. This study also evaluated the effect of ACP treatment using different gases on wheat grain germination parameters. The T-2 and HT-2 mycotoxin solutions applied on round cover-glass were placed on microscopy slides and wheat grains (0.5 g) were individually spiked with T-2 and HT-2 on their surfaces. Samples were then dried at room temperature (∼24 • C) and treated by air-ACP for 1 to 10 min. Ten minutes of air-ACP treatment significantly reduced pure T-2 and HT-2 concentrations by 63.63% and 51.5%, respectively. For mycotoxin spiked on wheat grains, 10 min air-ACP treatment significantly decreased T-2 and HT-2 concentrations up to 79.8% and 70.4%, respectively. No significant change in the measured quality and color parameters was observed in the ACP-treated samples. Wheat grain germination parameters were not significantly different, when treated with ACP using different gases. Air-ACP treatment and ACP treatment using 80% nitrogen + 20% oxygen improved the germination of wheat grains by 10% and 6%, respectively. This study demonstrated that ACP is an innovative technology with the potential to improve the safety of wheat grains by reducing T-2/HT-2 mycotoxins with an additional advantage of improving their germination.Practical Application: Atmospheric cold plasma (ACP) technology has a huge potential to degrade mycotoxins in food grains. This study evaluated the efficacy of ACP to reduce two major mycotoxins (T-2 and HT-2 toxins) in wheat grains. The results of this study will help to develop and scale-up the ACP technology for mycotoxin degradation in grains.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Reduction of T‐2 and HT‐2 mycotoxins by atmospheric cold plasma and its impact on quality changes and germination of wheat grains

Iqdiam

Feizollahi

Arif

et al. 2021

Journal of Food Science

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Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 8, there was a change in the concentration of nitrate anions. Notably, forms of nitrogen could be supplied to the solution only during the saturation of H2O with gaseous O3 (Equations ( 1)-( 4)) [48,49]: At the same time, it should be noted that the water types used did not significantly affect the height of the barley plants (Figure 7A), which, with equal plant density, corresponds to the quantity of biomass produced. It should be noted that barley plants were harvested at an early stage of development (plant height of 10 cm), when-in terms of biomass growth-they mainly rely on substances stored in the caryopses.…”

Section: Resultsmentioning

confidence: 99%

Variability of Properties Modulating the Biosynthesis of Biologically Active Compounds in Young Barley Treated with Ozonated Water

et al. 2023

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This paper presents the effects of irrigating barley plants with different type of water solutions saturated with gaseous ozone generated from atmospheric air. The study investigated the effects of the applied types of water on the modulation of the biosynthesis of selected bioactive compounds (content of total polyphenols, small molecule antioxidants, vitamin C) in the produced plant material. A number of transformations of reactive oxygen species (ROS) and nitrogen compounds have also been postulated; these are observed during the saturation of water with gaseous O3 and 30 min after the end of the process. It was shown that after the process of water saturation with gaseous O3, the gas later is converted to compounds with high oxidative potential and good stability; these, in turn, lead to the oxidation of oxidates generated from atmospheric nitrogen into nitrates, which exhibit fertilising properties. Thirty minutes after the process of H2O saturation with gaseous O3 was completed, the tests showed the highest concentrations of nitrates and the relatively high oxidative potential of the solution originating from H2O2 with a low concentration of the dissolved O3. This solution exhibited the highest activity modulating the biosynthesis of polyphenols, small molecule antioxidants and vitamin C in young barley plants. The resulting differences were significant, and they were reflected by 15% higher total polyphenol content, 35% higher antioxidative potential and 57% greater content of vitamin C compared to the control specimens (plants treated with fresh H2O).

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Household Ozone Disinfector as An Alternative Ozone Generator for Ozonolysis of Alkenes

et al. 2021

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Ozonolysis is an oxidative cleavage reaction of alkenes with ozone that is indispensable and has found many applications in organic synthesis. However, dedicated laboratory ozone generators are quite expensive equipment and may not be affordable by many laboratories. Recently, lowcost ozone disinfectors have become more common as a household appliance. Herein, we demonstrate the applicability of a household ozone disinfector, which can produce ozone in the order of 10 mmol/h, as alternative equipment for the laboratory scale ozonolysis of alkenes. The ozonolysis of 14 styrene derivatives bearing electron-donating and electron-withdrawing groups on aromatic rings including those with αand β-substituents, as well as 8 natural products containing olefinic moieties were investigated. Ozonolysis of these alkenes at millimole scales proceeded to completion within 30-40 minutes and the carbonyl products were obtained in 68% to quantitative yields. Preparative-scale ozonolysis of 4-methoxystyrene (6.17 g, 46 mmol) was also demonstrated. The reaction proceeded smoothly to yield 4anisaldehyde in 92% yield, which was subsequently converted to p-anisaldehyde dimethyl acetal in 66% yield. This work presents household ozone disinfector as an affordable, compact size, and practical synthetic equipment that does not require extra modification. Thus, the household ozone disinfector offers convenient access to ozonolysis or other reactions involving ozone for low-budget laboratories.

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Effect of nitrogen addition to ozone generation characteristics by diffuse and filamentary dielectric barrier discharges at atmospheric pressure

Cited by 7 publications

References 19 publications

Reduction of T‐2 and HT‐2 mycotoxins by atmospheric cold plasma and its impact on quality changes and germination of wheat grains

Reduction of T‐2 and HT‐2 mycotoxins by atmospheric cold plasma and its impact on quality changes and germination of wheat grains

Variability of Properties Modulating the Biosynthesis of Biologically Active Compounds in Young Barley Treated with Ozonated Water

Household Ozone Disinfector as An Alternative Ozone Generator for Ozonolysis of Alkenes

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