Plasma sterilization using glow discharge at atmospheric pressure

Akitsu, Takashiro; Ohkawa, Hiroshi; Tsuji, Masao; Kimura, Hideo; Kogoma, Masuhiro

doi:10.1016/j.surfcoat.2004.07.042

Cited by 129 publications

(76 citation statements)

References 3 publications

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“…It may be categorized as thermal or non-thermal plasma, depending on its density and electron temperature (Zhu et al, 2011). All types of plasma---including high, atmospheric, and low-pressure plasmas, have a broad spectrum of applications in different fields, such as textile (Huang et al, 2013;Malshe et al, 2013), electronics (He et al, 2013), life sciences (Pröfrock and Prange, 2012), packaging (Guillard et al, 2010;Pankaj et al, 2014a), dental applications (Hoffmann et al, 2013;Kim et al, 2014), sterilization (Lerouge et al, 2001;Moisan et al, 2002;Akitsu et al, 2005;Lee et al, 2006;De Geyter and Morent, 2012;Klämpfl et al, 2012;Kim et al, 2013;Ziuzina et al, 2013;Cui et al, 2016), plasma medicines (Weltmann et al, 2012;Laroussi, 2014), and food processing (Banu et al, 2012). Thanks to the special features of low-temperature (cold) atmospheric plasma technology---including cost-effectiveness, ability to achieve a moderate temperature in the vacuum-free systems, and flexibility in practice---many studies have recently been conducted on cold plasma applications (Oh et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Cold atmospheric plasma manipulation of proteins in food systems

Tolouie

Mohammadifar

Ghomi

et al. 2017

Critical Reviews in Food Science and Nutrition

145

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Section: Introductionmentioning

confidence: 99%

Cold atmospheric plasma manipulation of proteins in food systems

Tolouie

Mohammadifar

Ghomi

et al. 2017

Critical Reviews in Food Science and Nutrition

145

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“…Nonthermal atmospheric plasma (NTAP) treatments are shown to have germicidal effect on food pathogens, requiring less energy and time compared to other techniques (Akitsu, 2005). NTAP operates at ambient temperatures which allow for sterilization of heat labile instruments and low temperature food processing.…”

Section: Introductionmentioning

confidence: 99%

“…A recent study on pulsed UV light treatment of peanut and cow milk proteins resulted in reduced allergenicity. Previous literature suggests the photothermal, photophysical and photochemical effects of PUV light on food systems might result in the formation of aggregates and protein insolubility caused by the treatment (Chung et al, 2008;Anugu, 2009).Nonthermal atmospheric plasma (NTAP) treatments are shown to have germicidal effect on food pathogens, requiring less energy and time compared to other techniques (Akitsu, 2005). NTAP operates at ambient temperatures which allow for sterilization of heat labile instruments and low temperature food processing.…”

mentioning

confidence: 99%

Determining the effect of UV-C, high intensity ultrasound and nonthermal atmospheric plasma treatments on reducing the allergenicity of α-casein and whey proteins

Tammineedi

Choudhary

Pérez-Alvarado

et al. 2013

LWT - Food Science and Technology

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Determining the effect of UV-C, high intensity ultrasound and nonthermal atmospheric plasma treatments on reducing the allergenicity of a-casein and whey proteins. Determining the effect of UV-C , high intensity ultrasound and nonthermal atmospheric plasma treatments on reducing the allergenicity of α-casein and whey proteins Abstract:Casein, β-lactoglobulin and α-lactalbumin are major milk protein allergens. The objective of this study was to investigate the effect of high intensity ultrasound, nonthermal atmospheric plasma and UV-C light treatments in reducing the allergenicity of isolated major milk proteins. SDS-PAGE results for ultrasound and plasma treatments showed no noticeable change in gel band intensities for -casein, β-lactoglobulin and α-lactalbumin, indicating no change in protein concentration. Ci-ELISA analysis showed that there was no significant difference (p > 0.05) in IgE binding values for control and treated samples in ultrasound and plasma treatment conditions tested in this study. UV-C treatment for 15 min resulted in reduced intensities of all three protein bands in SDS-PAGE gel. Ci-ELISA of UV-C treated samples showed, significant reduction (p < 0.05) in IgE binding values compared to control samples indicating reduction in allergenicity of proteins (25% reduction for -casein and 27.7% reduction for whey fractions). Further investigations using in vivo clinical trials need to be conducted to confirm this result.Key words: UV-C light, High intensity Ultrasound, Nonthermal atmospheric plasma, Milk, Allergen, IgE binding. Abbreviations: UV-C = Ultraviolet-C, SDS-PAGE = Sodium dodecyl sulfate polyacrylamide gel electrophoresis, Ci-ELISA = Competitive indirect enzyme-linked immunosorbent assay, PBS = Phosphate buffered saline, PBST = Phosphate buffered saline with Tween 20, NTAP =Nonthermal atmospheric plasma, PUV = Pulsed UV light. IntroductionMilk is one of twelve allergenic ingredients whose presence has to be declared as per the directive 2003/89/EC (Monaci et al., 2006). Milk allergy is the most common food allergy in the children under the age of two years. About 1.6 to 2.8 % of this population have cow milk allergy (Poms et al., 2004). About 85% of those children outgrow their milk allergy after the age of three years. Approximately 0.3 to 7.5% of the world population is reported to be affected by cow milk allergy (El-Agamy, 2007).Almost all proteins in milk are allergens even at low concentrations (Wal, 2004). Milk contains two types of protein, casein and whey in 80:20 ratio. α-lactalbumin and β-lactoglobulin are the major components of whey. Caseins are the most allergenic proteins in milk followed by β-lactoglobulin and α-lactalbumin (Natale et al., 2004). Milk is a very rich nutrition source and is used as an ingredient in most of the weaning foods. Hence avoiding milk may lead to malnutrition in children and may affect their growth. Several researchers attempted to reduce milk allergenicity by applying different processing treatments. Although some of the treatments reduced a...

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“…So far the extent of their biocidal efficacy has been established typically using bacterial spores including those of Bacillus subtilis. [4][5][6][7][8] However, comparison of available efficacy data poses difficulties as surface microbial loadings, the concentration of bacteria applied per unit surface area, differ widely between different studies. For low-pressure vacuum plasmas, microbial loading is known to affect their inactivation efficiency 9 and so should be considered also in APGD inactivation studies.…”

mentioning

confidence: 99%

“…12 Specifically, after an incubation period of 8,6, and 4 days, respectively, at sporulation temperatures of 22, 30, and 47°C, most B. subtilis cells had sporulated. The resulting spores were harvested by centrifugation at 7367ϫ g at 5°C for 20 min.…”

mentioning

confidence: 99%

Effects of microbial loading and sporulation temperature on atmospheric plasma inactivation of Bacillus subtilis spores

Deng

Shi

Shama

et al. 2005

Applied Physics Letters

136

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Current inactivation studies of Bacillus subtilis spores using atmospheric-pressure glow discharges (APGD) do not consider two important factors, namely microbial loading at the surface of a substrate and sporulation temperature. Yet these are known to affect significantly microbial resistance to heat and hydrogen peroxide. This letter investigates effects of microbial loading and sporulation temperature on spore resistance to APGD. It is shown that microbial loading can lead to a stacking structure as a protective shield against APGD treatment and that high sporulation temperature increases spore resistance by altering core water content and cross-linked muramic acid content of B. subtilis spores.

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Plasma sterilization using glow discharge at atmospheric pressure

Cited by 129 publications

References 3 publications

Cold atmospheric plasma manipulation of proteins in food systems

Cold atmospheric plasma manipulation of proteins in food systems

Determining the effect of UV-C, high intensity ultrasound and nonthermal atmospheric plasma treatments on reducing the allergenicity of α-casein and whey proteins

Effects of microbial loading and sporulation temperature on atmospheric plasma inactivation of Bacillus subtilis spores

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