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Wei Q, Yuan Y, Zhang J, Wang J. Fungicidal efficiency of DBD cold plasma against Aspergillus niger on dried jujube. Food Microbiol 2024; 121:104523. [PMID: 38637085 DOI: 10.1016/j.fm.2024.104523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 03/21/2024] [Accepted: 03/22/2024] [Indexed: 04/20/2024]
Abstract
This study investigated the fungicidal efficiency and mechanism of action of dielectric barrier discharge cold atmosphere plasma (DBD-CAP) in inactivating Aspergillus niger (A. niger) spores. The disinfection efficacy and quality of dried jujube used as the processing application object were also studied. The results indicated that the Weibull + Tail model performed better for spore inactivation curves at different voltages among various treatment times, and the spore cells were reduced by 4.05 log (cfu/mL) in spores suspension at 70 kV after 15 min of treatment. This disinfection impact was further supported by scanning electron microscope (SEM) and transmission electron microscopy (TEM) images, which showed that the integrity of the cell membrane was damaged, and the intracellular content leaked out after DBD-CAP treatment. Elevated levels of reactive oxygen species (ROS) during the treatment increased the relative conductivity of cells, and leakage of nucleic acids and proteins further supported the disinfection impact. Additionally, the growth and toxicity of surviving A. niger spores after treatment were also greatly reduced. When DBD-CAP was applied to disinfecting dried jujube, the spore number exhibited a 2.67 log cfu/g reduction after treatment without significant damage observed onto the quality (P > 0.05).
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Affiliation(s)
- Qiaoyun Wei
- National Center Meat Quality & Safety and Control, College of Food Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; Nanjing Suman Plasma Engineering Institute Co. LTD, Nanjing 210095, China.
| | - Yuan Yuan
- National Center Meat Quality & Safety and Control, College of Food Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; Department of Food Science, University of Tennessee Institute of Agriculture, 2510 River Dr., Knoxville, TN, 37996, USA
| | - Jianhao Zhang
- National Center Meat Quality & Safety and Control, College of Food Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; Nanjing Suman Plasma Engineering Institute Co. LTD, Nanjing 210095, China.
| | - Jin Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Southeast University, Nanjing 210009, China.
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2
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Oliver MA, Hussein LK, Molina EA, Keyloun JW, McKnight SM, Jimenez LM, Moffatt LT, Shupp JW, Carney BC. Cold atmospheric plasma is bactericidal to wound-relevant pathogens and is compatible with burn wound healing. Burns 2024; 50:1192-1212. [PMID: 38262886 DOI: 10.1016/j.burns.2023.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 12/13/2023] [Accepted: 12/22/2023] [Indexed: 01/25/2024]
Abstract
Burn wound healing can be significantly delayed by infection leading to increased morbidity and hypertrophic scarring. An optimal antimicrobial agent would have the ability to kill bacteria without negatively affecting the host skin cells that are required for healing. Currently available products provide antimicrobial coverage, but may also cause reductions in cell proliferation and migration. Cold atmospheric plasma is a partially ionized gas that can be produced under atmospheric pressure at room temperature. In this study a novel handheld Aceso Plasma Generator was used to produce and test Aceso Cold Plasma (ACP) in vitro and in vivo. ACP showed a potent ability to eliminate bacterial load in vitro for a number of different species. Deep partial-thickness and full-thickness wounds that were treated with ACP after burning, after excision, after autografting, and at days 5, 7, and 9 did not show any negative effects on their wound healing trajectories. On par with in vitro analysis, bioburden was decreased in treated wounds vs. control. In addition, metrics of hypertrophic scar such as dyschromia, elasticity, trans-epidermal water loss (TEWL), and epidermal and dermal thickness were the same between the two treatment groups.It is likely that ACP can be used to mitigate the risk of bacterial infection during the phase of acute burn injury while patients await surgery for definitive closure. It may also be useful in treating wounds with delayed re-epithelialization that are at risk for infection and hypertrophic scarring. A handheld cold plasma device will be useful in treating all manner of wounds and surgical sites in order to decrease bacterial burden in an efficient and highly effective manner without compromising wound healing.
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Affiliation(s)
- Mary A Oliver
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - Lou'ay K Hussein
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - Esteban A Molina
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - John W Keyloun
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Surgery, MedStar Washington Hospital Center and MedStar Georgetown University Hospital, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - Sydney M McKnight
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - Lesle M Jimenez
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - Lauren T Moffatt
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Biochemistry and Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC, United States; Department of Surgery, Georgetown University School of Medicine, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - Jeffrey W Shupp
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Biochemistry and Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC, United States; Department of Surgery, Georgetown University School of Medicine, Washington, DC, United States; The Burn Center, Department of Surgery, MedStar Washington Hospital Center, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States
| | - Bonnie C Carney
- Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, United States; Department of Surgery, MedStar Washington Hospital Center and MedStar Georgetown University Hospital, Washington, DC, United States; Department of Biochemistry and Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC, United States; Department of Plastic and Reconstructive Surgery, Georgetown University School of Medicine, Washington, DC, United States.
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3
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Kulišová M, Rabochová M, Lorinčík J, Maťátková O, Brányik T, Hrudka J, Scholtz V, Jarošová Kolouchová I. Comparative assessment of UV-C radiation and non-thermal plasma for inactivation of foodborne fungal spores suspension in vitro. RSC Adv 2024; 14:16835-16845. [PMID: 38784412 PMCID: PMC11114098 DOI: 10.1039/d4ra01689k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024] Open
Abstract
Fungal contamination poses a persistent challenge to industries, particularly in food, healthcare, and clinical sectors, due to the remarkable resilience of fungi in withstanding conventional control methods. In this context, our research delves into the comparative efficacy of UV radiation and non-thermal plasma (NTP) on key foodborne fungal contaminants - Alternaria alternata, Aspergillus niger, Fusarium culmorum, and Fusarium graminearum. The study examined the impact of varying doses of UV radiation on the asexual spores of all mentioned fungal strains. Simultaneously, the study compared the effects of UV radiation and NTP on the metabolic activity of cells after spore germination and their subsequent germination ability. The results revealed that UV-C radiation (254 nm) did not significantly suppress the metabolic activity of cells after spore germination. In contrast, NTP exhibited almost 100% effectiveness on both selected spores and their subsequent germination, except for A. niger. In the case of A. niger, the effectiveness of UV-C and NTP was nearly comparable, showing only a 35% decrease in metabolic activity after 48 hours of germination, while the other strains (A. alternata, F. culmorum, F. graminearum) exhibited a reduction of more than 95%. SEM images illustrate the morphological changes in structure of all tested spores after both treatments. This study addresses a crucial gap in existing literature, offering insights into the adaptation possibilities of treated cells and emphasizing the importance of considering exposure duration and nutrient conditions (introduction of fresh medium). The results highlighted the promising antimicrobial potential of NTP, especially for filamentous fungi, paving the way for enhanced sanitation processes with diverse applications.
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Affiliation(s)
- Markéta Kulišová
- University of Chemistry and Technology, Prague, Department of Biotechnology Technická 5, 166 28, Praha 6 Prague Czech Republic
| | - Michaela Rabochová
- Research Centre Rez, Department of Material Analysis Hlavní 130, 250 68, Husinec-Řež Czech Republic
- Czech Technical University in Prague, Faculty of Biomedical Engineering nám. Sítná 3105 272 01 Kladno Czech Republic
| | - Jan Lorinčík
- Research Centre Rez, Department of Material Analysis Hlavní 130, 250 68, Husinec-Řež Czech Republic
| | - Olga Maťátková
- University of Chemistry and Technology, Prague, Department of Biotechnology Technická 5, 166 28, Praha 6 Prague Czech Republic
| | - Tomáš Brányik
- Research Institute of Brewing and Malting Lípová 15 120 44 Prague Czech Republic
| | - Jan Hrudka
- University of Chemistry and Technology, Prague, Department of Physics and Measurements Technická 5, 166 28, Praha 6 Prague Czech Republic
| | - Vladimír Scholtz
- University of Chemistry and Technology, Prague, Department of Physics and Measurements Technická 5, 166 28, Praha 6 Prague Czech Republic
| | - Irena Jarošová Kolouchová
- University of Chemistry and Technology, Prague, Department of Biotechnology Technická 5, 166 28, Praha 6 Prague Czech Republic
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4
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Hahn V, Zühlke D, Winter H, Landskron A, Bernhardt J, Sievers S, Schmidt M, von Woedtke T, Riedel K, Kolb JF. Proteomic profiling of antibiotic-resistant Escherichia coli GW-AmxH19 isolated from hospital wastewater treated with physical plasma. Proteomics 2024:e2300494. [PMID: 38644344 DOI: 10.1002/pmic.202300494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 03/29/2024] [Accepted: 04/04/2024] [Indexed: 04/23/2024]
Abstract
Microorganisms which are resistant to antibiotics are a global threat to the health of humans and animals. Wastewater treatment plants are known hotspots for the dissemination of antibiotic resistances. Therefore, novel methods for the inactivation of pathogens, and in particular antibiotic-resistant microorganisms (ARM), are of increasing interest. An especially promising method could be a water treatment by physical plasma which provides charged particles, electric fields, UV-radiation, and reactive species. The latter are foremost responsible for the antimicrobial properties of plasma. Thus, with plasma it might be possible to reduce the amount of ARM and to establish this technology as additional treatment stage for wastewater remediation. However, the impact of plasma on microorganisms beyond a mere inactivation was analyzed in more detail by a proteomic approach. Therefore, Escherichia coli GW-AmxH19, isolated from hospital wastewater in Germany, was used. The bacterial solution was treated by a plasma discharge ignited between each of four pins and the liquid surface. The growth of E. coli and the pH-value decreased during plasma treatment in comparison with the untreated control. Proteome and antibiotic resistance profile were analyzed. Concentrations of nitrite and nitrate were determined as long-lived indicative products of a transient chemistry associated with reactive nitrogen species (RNS). Conversely, hydrogen peroxide served as indicator for reactive oxygen species (ROS). Proteome analyses revealed an oxidative stress response as a result of plasma-generated RNS and ROS as well as a pH-balancing reaction as key responses to plasma treatment. Both, the generation of reactive species and a decreased pH-value is characteristic for plasma-treated solutions. The plasma-mediated changes of the proteome are discussed also in comparison with the Gram-positive bacterium Bacillus subtilis. Furthermore, no effect of the plasma treatment, on the antibiotic resistance of E. coli, was determined under the chosen conditions. The knowledge about the physiological changes of ARM in response to plasma is of fundamental interest to understand the molecular basis for the inactivation. This will be important for the further development and implementation of plasma in wastewater remediation.
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Affiliation(s)
- Veronika Hahn
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
| | - Daniela Zühlke
- Institute of Marine Biotechnology, Greifswald, Germany
- Department of Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Hauke Winter
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
- Department of Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Annchristin Landskron
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
- Department of Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Jörg Bernhardt
- Department of Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Susanne Sievers
- Department of Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Michael Schmidt
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
| | - Thomas von Woedtke
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
- Institute for Hygiene and Environmental Medicine, Greifswald University Medicine, Greifswald, Germany
| | - Katharina Riedel
- Institute of Marine Biotechnology, Greifswald, Germany
- Department of Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Juergen F Kolb
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
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Kulišová M, Rabochová M, Lorinčík J, Brányik T, Hrudka J, Scholtz V, Jarošová Kolouchová I. Exploring Non-Thermal Plasma and UV Radiation as Biofilm Control Strategies against Foodborne Filamentous Fungal Contaminants. Foods 2024; 13:1054. [PMID: 38611358 PMCID: PMC11011738 DOI: 10.3390/foods13071054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 03/27/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
In recent years, non-thermal plasma (NTP) has emerged as a promising tool for decontamination and disinfection within the food industry. Given the increasing resistance of microbial biofilms to conventional disinfectants and their adverse environmental effects, this method has significant potential for eliminating biofilm formation or mitigating the metabolic activity of grown biofilms. A comparative study was conducted evaluating the efficacy of UV radiation and NTP in eradicating mature biofilms of four common foodborne filamentous fungal contaminants: Alternaria alternata, Aspergillus niger, Fusarium culmorum, and Fusarium graminearum. The findings reveal that while UV radiation exhibits variable efficacy depending on the duration of exposure and fungal species, NTP induces substantial morphological alterations in biofilms, disrupting hyphae, and reducing extracellular polymeric substance production, particularly in A. alternata and F. culmorum. Notably, scanning electron microscopy analysis demonstrates significant disruption of the hyphae in NTP-treated biofilms, indicating its ability to penetrate the biofilm matrix, which is a promising outcome for biofilm eradication strategies. The use of NTP could offer a more environmentally friendly and potentially more effective alternative to traditional disinfection methods.
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Affiliation(s)
- Markéta Kulišová
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic;
| | - Michaela Rabochová
- Department of Material Analysis, Research Centre Rez, Hlavní 130, 250 68 Husinec-Řež, Czech Republic; (M.R.); (J.L.)
- Faculty of Biomedical Engineering, Czech Technical University in Prague, nám. Sítná 3105, 272 01 Kladno, Czech Republic
| | - Jan Lorinčík
- Department of Material Analysis, Research Centre Rez, Hlavní 130, 250 68 Husinec-Řež, Czech Republic; (M.R.); (J.L.)
| | - Tomáš Brányik
- Research Institute of Brewing and Malting, Lípová 15, 120 44 Prague, Czech Republic;
| | - Jan Hrudka
- Department of Physics and Measurements, Prague, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (J.H.); (V.S.)
| | - Vladimír Scholtz
- Department of Physics and Measurements, Prague, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (J.H.); (V.S.)
| | - Irena Jarošová Kolouchová
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic;
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6
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Alaguthevar R, Packialakshmi JS, Murugesan B, Rhim JW, Thiyagamoorthy U. In-package cold plasma treatment to extend the shelf life of food. Compr Rev Food Sci Food Saf 2024; 23:e13318. [PMID: 38532699 DOI: 10.1111/1541-4337.13318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/05/2024] [Accepted: 02/22/2024] [Indexed: 03/28/2024]
Abstract
Conventional food preservation methods such as heat treatment, irradiation, chemical treatment, refrigeration, and coating have various disadvantages, like loss of food quality, nutrition, and cost-effectiveness. Accordingly, cold plasma is one of the new technologies for food processing and has played an important role in preventing food spoilage. Specifically, in-package cold plasma has become a modern trend to decontaminate, process, and package food simultaneously. This strategy has proven successful in processing various fresh food ingredients, including spinach, fruits, vegetables, and meat. In particular, cold plasma treatment within the package reduces the risk of post-processing contamination. Cryoplasm decontamination within packaging has been reported to reduce significantly the microbial load of many foods' spoilage-causing pathogens. However, studies are needed to focus more on the effects of in-package treatments on endogenous enzyme activity, pest control, and removal of toxic pesticide residues. In this review, we comprehensively evaluated the efficacy of in-package low-temperature plasma treatment to extend the shelf life of various foods. The mechanisms by which cold plasma interacts with food were investigated, emphasizing its effects on pathogen reduction, spoilage mitigation, and surface modification. The review also critically assessed the effects of the treatments on food quality, regulatory considerations, and their potential as viable technologies to improve food safety and packaging life. In-package cold plasma treatment could revolutionize food storage when combined with other sophisticated technologies such as nanotechnology.
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Affiliation(s)
- Ramalakshmi Alaguthevar
- Department of Food and Nutrition, BioNanocomposite Research Center, Kyung Hee University, Seoul, Republic of Korea
- Department of Food Process Engineering, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
| | | | - Balakrishnan Murugesan
- Department of Food Process Engineering, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
| | - Jong-Whan Rhim
- Department of Food and Nutrition, BioNanocomposite Research Center, Kyung Hee University, Seoul, Republic of Korea
| | - UmaMaheshwari Thiyagamoorthy
- Department of Food and Nutrition, BioNanocomposite Research Center, Kyung Hee University, Seoul, Republic of Korea
- Department of Soil Science and Agricultural Chemistry, ADAC & RI, Tamil Nadu Agricultural University, Trichy, Tamil Nadu, India
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Wang Y, Yu M, Xie Y, Ma W, Sun S, Li Q, Yang Y, Li X, Jia H, Zhao R. Mechanism of inactivation of Aspergillus flavus spores by dielectric barrier discharge plasma. Toxicon 2024; 239:107615. [PMID: 38219915 DOI: 10.1016/j.toxicon.2024.107615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/02/2024] [Accepted: 01/10/2024] [Indexed: 01/16/2024]
Abstract
Dielectric barrier discharge plasma (DBDP) displays strong against fungal spores, while its precise mechanism of spore inactivation remains inadequately understood. In this study, we applied morphological, in vivo and in vitro experiments, transcriptomics, and physicochemical detection to unveil the potential molecular pathways underlying the inactivation of Aspergillus flavus spores by DBDP. Our findings suggested that mycelium growth was inhibited as observed by SEM after 30 s treatment at 70 kV, meanwhile spore germination ceased and clustering occurred. It led to the release of cellular contents and subsequent spore demise by disrupting the integrity of spore membrane. Additionally, based on the transcriptomic data, we hypothesized that the induction of spore inactivation by DBDP might be associated with downregulation of genes related to cell membranes, organelles (mitochondria), oxidative phosphorylation, and the tricarboxylic acid cycle. Subsequently, we validated our transcriptomic findings by measuring the levels of relevant enzymes in metabolic pathways, such as superoxide dismutase, acetyl-CoA, total dehydrogenase, and ATP. These physicochemical indicators revealed that DBDP treatment resulted in mitochondrial dysfunction, redox imbalance, and inhibited energy metabolism pathways. These findings were consistent with the transcriptomic results. Hence, we concluded that DBDP accelerated spore rupture and death via ROS-mediated mitochondrial dysfunction, which does not depend on cell membranes.
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Affiliation(s)
- Yaxin Wang
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China.
| | - Mingming Yu
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China
| | - Yanli Xie
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China.
| | - Weibin Ma
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China
| | - Shumin Sun
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China
| | - Qian Li
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China
| | - Yuhui Yang
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China
| | - Xiao Li
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China
| | - Hang Jia
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China
| | - Renyong Zhao
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, PR China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, PR China.
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8
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Kahar SP, Shelar A, Annapure US. Effect of pin-to-plate atmospheric cold plasma (ACP) on microbial load and physicochemical properties in cinnamon, black pepper, and fennel. Food Res Int 2024; 177:113920. [PMID: 38225121 DOI: 10.1016/j.foodres.2023.113920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 12/12/2023] [Accepted: 12/21/2023] [Indexed: 01/17/2024]
Abstract
The current study aimed to investigate the influence of pin-to-plate atmospheric cold plasma treatment (ACP) on the microbial decontamination efficacy, physical (water activity, color, texture), and bioactive (total phenolic and anti-oxidant capacity, volatile oil profile) of three major spices cinnamon, black pepper, and fennel at three different voltages (170, 200, 230 V) and exposure time (5, 10, 15 min). The surface etching and oxidative reactions of cold plasma is anticipated to cause microbial decontamination of the spices. In accordance with this, the ACP treatment significantly reduced the yeast and mold count of cinnamon, black pepper, and fennel, resulting in 1.3 Log CFU/g, 1.1 Log CFU/g, and 1.0 Log CFU/g, respectively even at the lowest treatment at 170 V-5 min. While at the highest treatment of 230 V-15 min, complete decontamination in all the samples was observed due to the plasma-induced microbial cell disruption. The water activity of samples reduced post-treatment 0.69 ± 0.02 to 0.51 ± 0.03 for cinnamon, 0.61 ± 0.03 to 0.49 ± 0.01 for pepper, and 0.60 ± 0.02 to 0.43 ± 0.02 for fennel which further reassures better microbial stability. The color and textural properties were significantly unaffected (p > 0.05) preserving the fresh-like attributes. The total phenolic content was increased for cinnamon (2.26 %), black pepper (0.11 %), and fennel (0.33 %) after plasma treatment at 230 V-15 min due to the cold plasma surface etching phenomenon. However, the essential oil composition revealed no significant variation in all three spices' control and treated samples. Thus, the study proves the potential of the atmospheric pressure cold plasma for the complete decontamination of the investigated spices (cinnamon, pepper, fennel) without remarkable changes in the volatile oil profile.
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Affiliation(s)
- Suraj P Kahar
- Department of Food Engineering & Technology, Institute of Chemical Technology, Mumbai, Maharashtra, India
| | - Ashutosh Shelar
- Department of Food Engineering & Technology, Institute of Chemical Technology, Mumbai, Maharashtra, India
| | - Uday S Annapure
- Department of Food Engineering & Technology, Institute of Chemical Technology, Mumbai, Maharashtra, India; Institute of Chemical Technology, Marathwada Campus, Jalna, India.
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9
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Abdoli B, Khoshtaghaza MH, Ghomi H, Torshizi MAK, Mehdizadeh SA, Pishkar G, Dunn IC. Cold atmospheric pressure air plasma jet disinfection of table eggs: Inactivation of Salmonella enterica, cuticle integrity and egg quality. Int J Food Microbiol 2024; 410:110474. [PMID: 37984215 DOI: 10.1016/j.ijfoodmicro.2023.110474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 10/26/2023] [Accepted: 11/01/2023] [Indexed: 11/22/2023]
Abstract
Eggshell cuticles are first lines of defense against egg-associated pathogens, such as Salmonella enterica serovar Enteritidis (SE). Infections from eggs contaminated with this strain remain a significant risk. In addition, changes in the cuticle are closely related to changes in egg safety. The emerging non-thermal atmospheric pressure plasma technology enables a high rate of microbial inactivation at near-ambient temperatures, making it ideal for food safety applications. This study examines the effects of a cold atmospheric pressure air plasma jet (CAAP-J) on eggshell cuticle and egg quality whilst inactivating SE. Shell eggs inoculated with SE (7 log10 cfu/egg) were used as the samples to test the decontamination performance of the device. The tests were conducted using an industrial CAAP-J with different power levels (600-800 W), exposure times (60-120 s), at a fixeddistance of 20 mm from the plasma jet and an air flow rate of 3600 L/h. It was found that the best results were obtained after 120 s at maximum plasma power (800 W). Subsequent to the implementation of this plasma procedure, it was determined that no viable cells could be detected. After CAAP-J treatment, the temperature remains below 50.5 °C, thereby minimizing the risk of altering egg quality. All specific measurements (egg white pH, yolk pH, yolk color, HU, and eggshell breaking strength) have shown that CAAP-J treatment has no negative effect on egg quality. No changes in eggshell cuticle quality after CAAP-J treatment was confirmed through scanning electron microscope (SEM).
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Affiliation(s)
- Bahareh Abdoli
- Department of Biosystems Engineering, Tarbiat Modares University, Tehran, Iran
| | | | - Hamid Ghomi
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | | | - Saman Abdanan Mehdizadeh
- Mechanics of Biosystems Engineering Department, Faculty of Agricultural Engineering and Rural Development, Agricultural Sciences and Natural Resources University of Khuzestan, Ahvaz, Iran
| | | | - Ian C Dunn
- The Roslin Institute, The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian EH25 9RG, Scotland, United Kingdom
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10
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Elmore L, Minissale NJ, Israel L, Katz Z, Safran J, Barba A, Austin L, Schaer TP, Freeman TA. Evaluating the Healing Potential of J-Plasma Scalpel-Created Surgical Incisions in Porcine and Rat Models. Biomedicines 2024; 12:277. [PMID: 38397879 PMCID: PMC10886613 DOI: 10.3390/biomedicines12020277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/16/2024] [Accepted: 01/20/2024] [Indexed: 02/25/2024] Open
Abstract
Cold atmospheric plasma devices generate reactive oxygen and nitrogen species that can be anti-microbial but also promote cell migration, differentiation, and tissue wound healing. This report investigates the healing of surgical incisions created using cold plasma generated by the J-Plasma scalpel (Precise Open handpiece, Apyx Medical, Inc.) compared to a steel scalpel in in vivo porcine and rat models. The J-Plasma scalpel is currently FDA approved for the delivery of helium plasma to cut, coagulate, and ablate soft tissue during surgical procedures. To our knowledge, this device has not been studied in creating surgical incisions but only during deeper dissection and hemostasis. External macroscopic and histologic grading by blinded reviewers revealed no significant difference in wound healing appearance or physiology in incisions created using the plasma scalpel as compared with a steel blade scalpel. Incisions created with the plasma scalpel also had superior hemostasis and a reduction in tissue and blood carryover. Scanning electron microscopy (SEM) and histology showed collagen fibril fusion occurred as the plasma scalpel incised through the tissue, contributing to a sealing effect. In addition, when bacteria were injected into the dermis before incision, the plasma scalpel disrupted the bacterial membrane as visualized in SEM images. External macroscopic and histologic grading by blinded reviewers revealed no significant difference in wound healing appearance or physiology. Based on these results, we propose additional studies to clinically evaluate the use of cold plasma in applications requiring hemostasis or when an increased likelihood of subdermal pathogen leakage could cause surgical site infection (i.e., sites with increased hair follicles).
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Affiliation(s)
- Lilith Elmore
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | | | - Lauren Israel
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | - Zoe Katz
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | - Jordan Safran
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | - Adriana Barba
- Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348, USA (T.P.S.)
| | - Luke Austin
- Rothman Orthopaedic Institute, Philadelphia, PA 19107, USA
| | - Thomas P. Schaer
- Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348, USA (T.P.S.)
| | - Theresa A. Freeman
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
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11
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Marx AH, Oltmanns H, Meißner J, Verspohl J, Fuchsluger T, Busse C. Argon cold atmospheric plasma eradicates pathogens in vitro that are commonly associated with canine bacterial keratitis. Front Vet Sci 2024; 10:1320145. [PMID: 38264471 PMCID: PMC10803497 DOI: 10.3389/fvets.2023.1320145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/21/2023] [Indexed: 01/25/2024] Open
Abstract
Purpose To investigate the antimicrobial effect of cold atmospheric plasma (CAP) on pathogens associated with canine bacterial keratitis. Materials and methods Pseudomonas aeruginosa, Staphylococcus pseudintermedius, and Streptococcus canis strains, which were obtained from dogs with infectious keratitis, were subjected to testing. For each species, four isolates and a reference strain were cultivated on Columbia sheep blood agar and treated with the kiNPen Vet® plasma pen from Neoplas GmbH, Greifswald, Germany. Various continuous treatment durations (0.5, 2, and 5 min) were applied, along with a 0.5-min treatment repeated four times at short intervals. These treatments were conducted at distances of 3 and 18 mm between the agar surface and the pen. Results CAP treatment reduced bacterial growth in all three species. The most effective treatment duration was 5 min at 3 mm distance, resulting in inhibition zones ranging from 19 to 22 mm for P. aeruginosa, 26-45 mm for S. pseudintermedius and an overall reduction of bacterial growth for Str. canis. Inhibition zones were smaller with decreasing treatment duration and larger distance. Treatment times of 30 s repeated four times and 2 min showed comparable results. Treatment with argon alone did not lead to visible reduction of bacterial growth. Conclusion Argon cold atmospheric plasma demonstrated a potent in vitro antimicrobial effect on P. aeruginosa, S. pseudintermedius and Str. canis strains with the latter showing the highest sensitivity.
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Affiliation(s)
- Anne Helene Marx
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Hilke Oltmanns
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Jessica Meißner
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Jutta Verspohl
- Department of Microbiology, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Thomas Fuchsluger
- Department of Ophthalmology, University of Rostock, Rostock, Germany
| | - Claudia Busse
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
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12
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Lunder M, Dahle S, Fink R. Cold atmospheric plasma for surface disinfection: a promising weapon against deleterious meticillin-resistant Staphylococcus aureus biofilms. J Hosp Infect 2024; 143:64-75. [PMID: 37939884 DOI: 10.1016/j.jhin.2023.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/02/2023] [Accepted: 10/15/2023] [Indexed: 11/10/2023]
Abstract
BACKGROUND Bacteria are becoming increasingly resistant to classical antimicrobial agents, so new approaches need to be explored. AIM To assess the potential of cold atmospheric plasma for the management of meticillin-resistant Staphylococcus aureus (MRSA). METHODS The 24, 48, and 72 h resistant and susceptible S. aureus biofilms were exposed to 60, 120, and 180 s treatment with plasma. FINDINGS Increasing the treatment time results in higher cell reduction for both susceptible and resistant strains of S. aureus (P < 0.05). Up to log10 reduction factor of 5.24 cfu/cm2 can be achieved in 180 s of plasma treatment. Furthermore, plasma can substantially alter the cell's metabolisms and impact cell membrane integrity. However, it has not been shown that plasma can reduce biofilm biomass in the case of 24 h and 48 h biofilms, although the 72 h biofilm was more susceptible, and its biomass was decreased (P < 0.05). The accumulation of intrabacterial reactive oxygen species was also observed, which confirms the plasma's induction of oxidative stress. Finally, it was shown that continuous plasma exposure of bacterial cells does not cause resistance to plasma, nor is resistance developed to cefoxitin. CONCLUSION Cold atmospheric plasma is a good candidate for S. aureus and MRSA biofilm treatment and may therefore be of value in the bacterial resistance crisis.
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Affiliation(s)
- M Lunder
- University of Ljubljana, Faculty of Health Sciences, Ljubljana, Slovenia
| | - S Dahle
- University of Ljubljana, Biotechnical Faculty, Ljubljana, Slovenia
| | - R Fink
- University of Ljubljana, Faculty of Health Sciences, Ljubljana, Slovenia.
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13
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Usman I, Afzaal M, Imran A, Saeed F, Afzal A, Ashfaq I, Shah YA, Islam F, Azam I, Tariq I, Ateeq H, Asghar A, Farooq R, Rasheed A, Asif Shah M. Recent updates and perspectives of plasma in food processing: a review. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2023. [DOI: 10.1080/10942912.2023.2171052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Ifrah Usman
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Muhammad Afzaal
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Ali Imran
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Farhan Saeed
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Atka Afzal
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Iqra Ashfaq
- National Institute of Food Science and Technology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Yasir Abbas Shah
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Fakhar Islam
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Iqra Azam
- Department of Food Sciences, Government College Women University Faisalabad, Faisalabad, Pakistan
| | - Ifra Tariq
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Huda Ateeq
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Aasma Asghar
- Department of Home Economics, Government College University Faisalabad, Faisalabad, Pakistan
| | - Rimsha Farooq
- School of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Amara Rasheed
- Department of Food Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Mohd Asif Shah
- Department of Economics, College of Business and Economics, Kebri Dehar, University, Kebri Dehar, Ethiopia
- Adjunct Faculty, University Centre for Research & Development, Chandigarh University, Mohali, India
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14
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Karthik C, Sarngadharan SC, Thomas V. Low-Temperature Plasma Techniques in Biomedical Applications and Therapeutics: An Overview. Int J Mol Sci 2023; 25:524. [PMID: 38203693 PMCID: PMC10779006 DOI: 10.3390/ijms25010524] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/04/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024] Open
Abstract
Plasma, the fourth fundamental state of matter, comprises charged species and electrons, and it is a fascinating medium that is spread over the entire visible universe. In addition to that, plasma can be generated artificially under appropriate laboratory techniques. Artificially generated thermal or hot plasma has applications in heavy and electronic industries; however, the non-thermal (cold atmospheric or low temperature) plasma finds its applications mainly in biomedicals and therapeutics. One of the important characteristics of LTP is that the constituent particles in the plasma stream can often maintain an overall temperature of nearly room temperature, even though the thermal parameters of the free electrons go up to 1 to 10 keV. The presence of reactive chemical species at ambient temperature and atmospheric pressure makes LTP a bio-tolerant tool in biomedical applications with many advantages over conventional techniques. This review presents some of the important biomedical applications of cold-atmospheric plasma (CAP) or low-temperature plasma (LTP) in modern medicine, showcasing its effect in antimicrobial therapy, cancer treatment, drug/gene delivery, tissue engineering, implant modifications, interaction with biomolecules, etc., and overviews some present challenges in the field of plasma medicine.
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Affiliation(s)
- Chandrima Karthik
- Department of Materials & Mechanical Engineering, University of Alabama at Birmingham, 1150 10th Avenue South, Birmingham, AL 35205, USA;
| | | | - Vinoy Thomas
- Department of Materials & Mechanical Engineering, University of Alabama at Birmingham, 1150 10th Avenue South, Birmingham, AL 35205, USA;
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15
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Rovetta-Nogueira SDM, Borges AC, de Oliveira Filho M, Nishime TMC, Hein LRDO, Kostov KG, Koga-Ito CY. Helium Cold Atmospheric Plasma Causes Morphological and Biochemical Alterations in Candida albicans Cells. Molecules 2023; 28:7919. [PMID: 38067648 PMCID: PMC10707892 DOI: 10.3390/molecules28237919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/15/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
(1) Background: Previous studies reported the promising inhibitory effect of cold atmospheric plasma (CAP) on Candida albicans. However, the exact mechanisms of CAP's action on the fungal cell are still poorly understood. This study aims to elucidate the CAP effect on C. albicans cell wall, by evaluating the alterations on its structure and biochemical composition; (2) Methods: C. albicans cells treated with Helium-CAP were analyzed by atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR) in order to detect morphological, topographic and biochemical changes in the fungal cell wall. Cells treated with caspofungin were also analyzed for comparative purposes; (3) Results: Expressive morphological and topographic changes, such as increased roughness and shape modification, were observed in the cells after CAP exposure. The alterations detected were similar to those observed after the treatment with caspofungin. The main biochemical changes occurred in polysaccharides content, and an overall decrease in glucans and an increase in chitin synthesis were detected; (4) Conclusions: Helium-CAP caused morphological and topographic alterations in C. albicans cells and affected the cell wall polysaccharide content.
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Affiliation(s)
- Sabrina de Moura Rovetta-Nogueira
- Oral Biopathology Graduate Program, Department of Environment Engineering, São José dos Campos Institute of Science & Technology, São Paulo State University (UNESP), São José dos Campos 12247-016, SP, Brazil; (S.d.M.R.-N.); (A.C.B.)
| | - Aline Chiodi Borges
- Oral Biopathology Graduate Program, Department of Environment Engineering, São José dos Campos Institute of Science & Technology, São Paulo State University (UNESP), São José dos Campos 12247-016, SP, Brazil; (S.d.M.R.-N.); (A.C.B.)
| | - Maurício de Oliveira Filho
- Department of Materials and Technology, Guaratinguetá Faculty of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá 12516-410, SP, Brazil; (M.d.O.F.); (L.R.d.O.H.)
| | | | - Luis Rogerio de Oliveira Hein
- Department of Materials and Technology, Guaratinguetá Faculty of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá 12516-410, SP, Brazil; (M.d.O.F.); (L.R.d.O.H.)
| | - Konstantin Georgiev Kostov
- Department of Physics, Guaratinguetá Faculty of Engineering, São Paulo State University (UNESP), Guaratinguetá 12516-410, SP, Brazil;
| | - Cristiane Yumi Koga-Ito
- Oral Biopathology Graduate Program, Department of Environment Engineering, São José dos Campos Institute of Science & Technology, São Paulo State University (UNESP), São José dos Campos 12247-016, SP, Brazil; (S.d.M.R.-N.); (A.C.B.)
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16
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Maybin JA, Thompson TP, Flynn PB, Skvortsov T, Hickok NJ, Freeman TA, Gilmore BF. Cold atmospheric pressure plasma-antibiotic synergy in Pseudomonas aeruginosa biofilms is mediated via oxidative stress response. Biofilm 2023; 5:100122. [PMID: 37214348 PMCID: PMC10196807 DOI: 10.1016/j.bioflm.2023.100122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/06/2023] [Accepted: 04/06/2023] [Indexed: 05/24/2023] Open
Abstract
Cold atmospheric-pressure plasma (CAP) has emerged as a potential alternative or adjuvant to conventional antibiotics for the treatment of bacterial infections, including those caused by antibiotic-resistant pathogens. The potential of sub-lethal CAP exposures to synergise conventional antimicrobials for the eradication of Pseudomonas aeruginosa biofilms is investigated in this study. The efficacy of antimicrobials following or in the absence of sub-lethal CAP pre-treatment in P. aeruginosa biofilms was assessed. CAP pre-treatment resulted in an increase in both planktonic and biofilm antimicrobial sensitivity for all three strains tested (PAO1, PA14, and PA10548), with both minimum inhibitory concentrations (MICs) and minimum biofilm eradication concentrations (MBECs) of individual antimicrobials, being significantly reduced following CAP pre-treatment of the biofilm (512-fold reduction with ciprofloxacin/gentamicin; and a 256-fold reduction with tobramycin). At all concentrations of antimicrobial used, the combination of sub-lethal CAP exposure and antimicrobials was effective at increasing time-to-peak metabolism, as measured by isothermal microcalorimetry, again indicating enhanced susceptibility. CAP is known to damage bacterial cell membranes and DNA by causing oxidative stress through the in situ generation of reactive oxygen and nitrogen species (RONS). While the exact mechanism is not clear, oxidative stress on outer membrane proteins is thought to damage/perturb cell membranes, confirmed by ATP and LDH leakage, allowing antimicrobials to penetrate the bacterial cell more effectively, thus increasing bacterial susceptibility. Transcriptomic analysis, reveals that cold-plasma mediated oxidative stress caused upregulation of P. aeruginosa superoxide dismutase, cbb3 oxidases, catalases, and peroxidases, and upregulation in denitrification genes, suggesting that P. aeruginosa uses these enzymes to degrade RONS and mitigate the effects of cold plasma mediated oxidative stress. CAP treatment also led to an increased production of the signalling molecule ppGpp in P. aeruginosa, indicative of a stringent response being established. Although we did not directly measure persister cell formation, this stringent response may potentially be associated with the formation of persister cells in biofilm cultures. The production of ppGpp and polyphosphate may be associated with protein synthesis inhibition and increase efflux pump activity, factors which can result in antimicrobial tolerance. The transcriptomic analysis also showed that by 6 h post-treatment, there was downregulation in ribosome modulation factor, which is involved in the formation of persister cells, suggesting that the cells had begun to resuscitate/recover. In addition, CAP treatment at 4 h post-exposure caused downregulation of the virulence factors pyoverdine and pyocyanin; by 6 h post-exposure, virulence factor production was increasing. Transcriptomic analysis provides valuable insights into the mechanisms by which P. aeruginosa biofilms exhibits enhanced susceptibility to antimicrobials. Overall, these findings suggest, for the first time, that short CAP sub-lethal pre-treatment can be an effective strategy for enhancing the susceptibility of P. aeruginosa biofilms to antimicrobials and provides important mechanistic insights into cold plasma-antimicrobial synergy. Transcriptomic analysis of the response to, and recovery from, sub-lethal cold plasma exposures in P. aeruginosa biofilms improves our current understanding of cold plasma biofilm interactions.
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Affiliation(s)
- Jordanne-Amee Maybin
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, UK
| | - Thomas P Thompson
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, UK
| | - Padrig B Flynn
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, UK
| | - Timofey Skvortsov
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, UK
| | - Noreen J Hickok
- Department of Orthopaedic Surgery Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Theresa A Freeman
- Department of Orthopaedic Surgery Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Brendan F Gilmore
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, UK
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast, BT9 5DL, UK
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17
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Filipić A, Dobnik D, Gutiérrez-Aguirre I, Ravnikar M, Košir T, Baebler Š, Štern A, Žegura B, Petkovšek M, Dular M, Mozetič M, Zaplotnik R, Primc G. Cold plasma within a stable supercavitation bubble - A breakthrough technology for efficient inactivation of viruses in water. ENVIRONMENT INTERNATIONAL 2023; 182:108285. [PMID: 37972530 DOI: 10.1016/j.envint.2023.108285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 10/06/2023] [Accepted: 10/22/2023] [Indexed: 11/19/2023]
Abstract
Water scarcity, one of the most pressing challenges we face today, has developed for many reasons, including the increasing number of waterborne pollutants that affect the safety of the water environment. Waterborne human, animal and plant viruses represent huge health, environmental, and financial burden and thus it is important to efficiently inactivate them. Therefore, the main objective of this study was to construct a unique device combining plasma with supercavitation and to evaluate its efficiency for water decontamination with the emphasis on inactivation of viruses. High inactivation (>5 log10 PFU/mL) of bacteriophage MS2, a human enteric virus surrogate, was achieved after treatment of 0.43 L of recirculating water for up to 4 min. The key factors in the inactivation were short-lived reactive plasma species that damaged viral RNA. Water treated with plasma for a short time required for successful virus inactivation did not cause cytotoxic effects in the in vitro HepG2 cell model system or adverse effects on potato plant physiology. Therefore, the combined plasma-supercavitation device represents an environmentally-friendly technology that could provide contamination-free and safe water.
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Affiliation(s)
- Arijana Filipić
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - David Dobnik
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Ion Gutiérrez-Aguirre
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Maja Ravnikar
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Tamara Košir
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Špela Baebler
- Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Alja Štern
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Bojana Žegura
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Martin Petkovšek
- University of Ljubljana, Faculty of Mechanical Engineering, Ljubljana, Slovenia
| | - Matevž Dular
- University of Ljubljana, Faculty of Mechanical Engineering, Ljubljana, Slovenia
| | - Miran Mozetič
- Department of Surface Engineering, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Rok Zaplotnik
- Department of Surface Engineering, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Gregor Primc
- Department of Surface Engineering, Jožef Stefan Institute, Ljubljana, Slovenia.
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18
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Soni A, Brightwell G. Effect of novel and conventional food processing technologies on Bacillus cereus spores. ADVANCES IN FOOD AND NUTRITION RESEARCH 2023; 108:265-287. [PMID: 38461001 DOI: 10.1016/bs.afnr.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2024]
Abstract
This chapter provides a summary of the effect of thermal and non-thermal processing technologies on Bacillus cereus spores, a well-known pathogenic bacterium associated with foodborne illnesses. B. cereus has been frequently detected in rice, milk products, infant food, liquid eggs products and meat products all over the world. This Gram positive, rod-shaped, facultative anaerobe can produce endospores that can withstand pasteurization, UV radiation, and chemical reagents commonly used for sanitization. B. cereus spores can germinate into vegetative cells that can produce toxins. The conventional regime for eliminating spores from food is retorting which uses the application of high temperature (121 °C). However, at this temperature, there could be a significant amount of loss in the organoleptic and functional qualities of the food components, especially proteins. This leads to the research on the preventive measures against germination and if possible, to reduce the resistance before using a non-thermal technology (temperatures less than retorting-121 °C) for inactivation. This chapter reviews the development and success of several food processing technologies in their ability to inactivate B. cereus spores in food.
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Affiliation(s)
- Aswathi Soni
- Food System Integrity, Smart Foods and Bioproducts, AgResearch Ltd., Hopkirk Research Institute, Massey University, Palmerston North, New Zealand.
| | - Gale Brightwell
- Food System Integrity, Smart Foods and Bioproducts, AgResearch Ltd., Hopkirk Research Institute, Massey University, Palmerston North, New Zealand; New Zealand Food Safety Science and Research Centre, Massey University Manawatu (Turitea), Palmerston North, New Zealand
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19
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Özdemir E, Başaran P, Kartal S, Akan T. Cold plasma application to fresh green leafy vegetables: Impact on microbiology and product quality. Compr Rev Food Sci Food Saf 2023; 22:4484-4515. [PMID: 37661766 DOI: 10.1111/1541-4337.13231] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 07/12/2023] [Accepted: 08/03/2023] [Indexed: 09/05/2023]
Abstract
Fresh green leafy vegetables (FGLVs) are consumed either garden-fresh or by going through very few simple processing steps. For this reason, foodborne diseases that come with the consumption of fresh products in many countries have prioritized the development of new and reliable technologies to reduce food-related epidemics. Cold plasma (CP) is considered one of the sustainable and green processing approaches that inactivate target microorganisms without causing a significant temperature increase during processing. This review presents an overview of recent developments regarding the commercialization potential of CP-treated FGLVs, focusing on specific areas such as microbial inactivation and the influence of CP on product quality. The effect of CP differs according to the power of the plasma, frequency, gas flow rate, application time, ionizing gases composition, the distance between the electrodes and pressure, as well as the characteristics of the product. As well as microbial decontamination, CP offers significant potential for increasing the shelf life of perishable and short-shelf-life products. In addition, organizations actively involved in CP research and development and patent applications (2016-2022) have also been analyzed.
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Affiliation(s)
- Emel Özdemir
- Department of Food Engineering, Istanbul Technical University, Istanbul, Turkey
| | - Pervin Başaran
- Department of Food Engineering, Istanbul Technical University, Istanbul, Turkey
| | - Sehban Kartal
- Department of Physics, Istanbul University, Istanbul, Turkey
| | - Tamer Akan
- Department of Physics, Eskisehir Osmangazi University, Eskisehir, Turkey
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20
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Jayasena DD, Kang T, Wijayasekara KN, Jo C. Innovative Application of Cold Plasma Technology in Meat and Its Products. Food Sci Anim Resour 2023; 43:1087-1110. [PMID: 37969327 PMCID: PMC10636222 DOI: 10.5851/kosfa.2023.e31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/16/2023] [Accepted: 06/16/2023] [Indexed: 11/17/2023] Open
Abstract
The growing demand for sustainable food production and the rising consumer preference for fresh, healthy, and safe food products have been driving the need for innovative methods for processing and preserving food. In the meat industry, this demand has led to the development of new interventions aimed at extending the shelf life of meats and its products while maintaining their quality and nutritional value. Cold plasma has recently emerged as a subject of great interest in the meat industry due to its potential to enhance the microbiological safety of meat and its products. This review discusses the latest research on the possible application of cold plasma in the meat processing industry, considering its effects on various quality attributes and its potential for meat preservation and enhancement. In this regard, many studies have reported substantial antimicrobial efficacy of cold plasma technology in beef, pork, lamb and chicken, and their products with negligible changes in their physicochemical attributes. Further, the application of cold plasma in meat processing has shown promising results as a potential novel curing agent for cured meat products. Understanding the mechanisms of action and the interactions between cold plasma and food ingredients is crucial for further exploring the potential of this technology in the meat industry, ultimately leading to the development of safe and high-quality meat products using cold plasma technology.
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Affiliation(s)
- Dinesh D. Jayasena
- Department of Animal Science, Faculty of
Animal Science and Export Agriculture, Uva Wellassa
University, Badulla 90000, Sri Lanka
| | - Taemin Kang
- Department of Agricultural Biotechnology,
Center for Food and Bioconvergence, and Research Institute of Agriculture
and Life Science, Seoul National University, Seoul 08826,
Korea
| | - Kaushalya N. Wijayasekara
- Department of Animal Science, Faculty of
Animal Science and Export Agriculture, Uva Wellassa
University, Badulla 90000, Sri Lanka
| | - Cheorun Jo
- Department of Agricultural Biotechnology,
Center for Food and Bioconvergence, and Research Institute of Agriculture
and Life Science, Seoul National University, Seoul 08826,
Korea
- Institute of Green Bio Science and
Technology, Seoul National University, Pyeongchang 25354,
Korea
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21
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Małajowicz J, Khachatryan K, Oszczęda Z, Karpiński P, Fabiszewska A, Zieniuk B, Krysowaty K. The Effect of Plasma-Treated Water on Microbial Growth and Biosynthesis of Gamma-Decalactones by Yarrowia lipolytica Yeast. Int J Mol Sci 2023; 24:15204. [PMID: 37894885 PMCID: PMC10607521 DOI: 10.3390/ijms242015204] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/13/2023] [Accepted: 10/14/2023] [Indexed: 10/29/2023] Open
Abstract
In recent years, the production of plasma-treated water (PTW) by low-temperature low-pressure glow plasma (LPGP) has been increasingly gaining in popularity. LPGP-treated water changes its physical and physiochemical properties compared to standard distilled water. In this study, a non-conventional lipolytic yeast species Yarrowia lipolytica was cultivated in culture media based on Nantes plasma water with heightened singlet oxygen content (Nantes PW) or in water treated with low-temperature, low-pressure glow plasma while in contact with air (PWTA) or nitrogen (PWTN). The research aimed to assess the influence of culture conditions on castor oil biotransformation to gamma-decalactone (GDL) and other secondary metabolites in media based on nanowater. The Nantes plasma water-based medium attained the highest concentration of gamma-decalactone (4.81 ± 0.51 g/L at 144 h of culture), maximum biomass concentration and biomass yield from the substrate. The amplified activity of lipases in the nanowater-based medium, in comparison to the control medium, is encouraging from the perspective of GDL biosynthesis, relying on the biotransformation of ricinoleic acid, which is the primary component of castor oil. Although lipid hydrolysis was enhanced, this step seemed not crucial for GDL concentration. Interestingly, the study validates the significance of oxygen in β-oxidation enzymes and its role in the bioconversion of ricinoleic acid to GDL and other lactones. Specifically, media with higher oxygen content (WPTA) and Nantes plasma water resulted in remarkably high concentrations of four lactones: gamma-decalactone, 3-hydroxy-gamma-decalactone, dec-2-en-4-olide and dec-3-en-4-olide.
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Affiliation(s)
- Jolanta Małajowicz
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Nowoursynowska Street 159C, 02-776 Warsaw, Poland; (A.F.); (B.Z.)
| | - Karen Khachatryan
- Laboratory of Nanomaterials and Nanotechnology, Faculty of Food Technology, University of Agriculture in Cracow, Balicka Street 122, 30-149 Cracow, Poland;
| | - Zdzisław Oszczęda
- Nantes Nanotechnological Systems, Dolne Młyny Street 21, 59-700 Bolesławiec, Poland;
| | - Piotr Karpiński
- Faculty of Computer Science and Technology, Lomza State University of Applied Sciences, Akademicka Street 1, 18-400 Łomża, Poland;
| | - Agata Fabiszewska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Nowoursynowska Street 159C, 02-776 Warsaw, Poland; (A.F.); (B.Z.)
| | - Bartłomiej Zieniuk
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, Nowoursynowska Street 159C, 02-776 Warsaw, Poland; (A.F.); (B.Z.)
| | - Konrad Krysowaty
- Faculty of Biology and Biotechnology, Warsaw University of Life Sciences, Nowoursynowska Street 159, 02-776 Warsaw, Poland;
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22
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Ramezan Y, Hematabadi H, Ramezan M, Khani MR, Kamkari A, Najafi Tabrizi A. Effect of cold atmospheric plasma torch distance on the microbial inactivation and sensorial properties of ready-to-eat olivier salad. FOOD SCI TECHNOL INT 2023; 29:710-717. [PMID: 35726184 DOI: 10.1177/10820132221108709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study aimed to investigate the effect of the cold atmospheric plasma torch (CAPT) nozzle distance from the surface of Olivier salad and the treatment time in the reduction of microbial load and sensory properties of the product simultaneously. In this study, the CAPT nozzle was placed at 3, 5, and 7 cm distances from the surface of the Olivier salad, and its efficiency in inactivating the microbial population, decimal reduction time (D-value), and sensory evaluation of the product were evaluated. The results showed that reducing the distance and increasing the plasma treatment time (30, 60, 90, and 120 s) both reduced the microbial load of the product. The maximum inactivation and the minimum D-value are related to the 3 cm distance for 120 s, which has been 3.77, 2.91, and 1.52 log CFU/g for Coliform, Total viable count (TVC), mold and yeast, respectively. The lowest D-value was related to Coliform (4.41 s). CAPT treatment had no significant sensible effect on the product's sensory characteristics compared to the control sample. The treated sample at a 3 cm distance for 90 s and the microbial reduction to an acceptable amount and high acceptancy from sensory evaluators were selected as the superior treatment in this study. Also, the results showed that CAPT could be used successfully in ready-to-eat (RTE) products.
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Affiliation(s)
- Yousef Ramezan
- Department of Food Science and Technology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- Nutrition & Food Sciences Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Homayun Hematabadi
- Department of Food Science and Technology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mina Ramezan
- Department of Biochemistry, Faculty of Science and New Technologies, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohammad Reza Khani
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Amir Kamkari
- Department of Food Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Abbas Najafi Tabrizi
- Department of Food Science and Technology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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23
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Sahraeian S, Rashidinejad A, Niakousari M. Enhanced properties of non-starch polysaccharide and protein hydrocolloids through plasma treatment: A review. Int J Biol Macromol 2023; 249:126098. [PMID: 37543265 DOI: 10.1016/j.ijbiomac.2023.126098] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/10/2023] [Accepted: 07/24/2023] [Indexed: 08/07/2023]
Abstract
Hydrocolloids are important ingredients in food formulations and their modification can lead to novel ingredients with unique functionalities beyond their nutritional value. Cold plasma is a promising technology for the modification of food biopolymers due to its non-toxic and eco-friendly nature. This review discusses the recent published studies on the effects of cold plasma treatment on non-starch hydrocolloids and their derivatives. It covers the common phenomena that occur during plasma treatment, including ionization, etching effect, surface modification, and ashing effect, and how they contribute to various changes in food biopolymers. The effects of plasma treatment on important properties such as color, crystallinity, chemical structure, rheological behavior, and thermal properties of non-starch hydrocolloids and their derivatives are also discussed. In addition, this review highlights the potential of cold plasma treatment to enhance the functionality of food biopolymers and improve the quality of food products. The mechanisms underlying the effects of plasma treatment on food biopolymers, which can be useful for future research in this area, are also discussed. Overall, this review paper presents a comprehensive overview of the current knowledge in the field of cold plasma treatment of non-starch hydrocolloids and their derivatives and highlights the areas that require further investigation.
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Affiliation(s)
- Shahriyar Sahraeian
- Department of Food Science and Technology, College of Agriculture, Shiraz University, Shiraz, Iran
| | - Ali Rashidinejad
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand.
| | - Mehrdad Niakousari
- Department of Food Science and Technology, College of Agriculture, Shiraz University, Shiraz, Iran
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24
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Scholtz V, Jirešová J, Fišer L, Obrová K, Sláma M, Klenivskyi M, Khun J, Vaňková E. Non-thermal plasma disinfecting procedure is harmless to delicate items of everyday use. Sci Rep 2023; 13:15479. [PMID: 37726338 PMCID: PMC10509187 DOI: 10.1038/s41598-023-42405-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/09/2023] [Indexed: 09/21/2023] Open
Abstract
Non-thermal plasma (NTP) is a well-known decontamination tool applicable for a wide range of microorganisms and viruses. Since the recent COVID-19 pandemic highlighted the need to decontaminate all daily used items, it is highly desirable to address the applicability of NTP, including its possible harmful effects. To the best of our knowledge, a comprehensive characterization of NTP effects on sensitive materials is still lacking. We investigated the potential damage to common materials of daily use inflicted by air atmospheric NTP generated in Plasmatico v1.0. The materials tested were paper, various metals, and passive and active electronic components modelling sensitive parts of commonly used small electronic devices. The NTP-exposed paper remained fully usable with only slight changes in its properties, such as whitening, pH change, and degree of polymerization. NTP caused mild oxidation of copper, tinned copper, brass, and a very mild oxidation of stainless steel. However, these changes do not affect the normal functionality of these materials. No significant changes were observed for passive electronic components; active components displayed a very slight shift of the measured values observed for the humidity sensor. In conclusion, NTP can be considered a gentle tool suitable for decontamination of various sensitive materials.
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Affiliation(s)
- V Scholtz
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic.
| | - J Jirešová
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic
| | - L Fišer
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic
| | - K Obrová
- Division Molecular Microbiology, St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria
| | - M Sláma
- Faculty of Science, University of Hradec Kralove, Hradec Králové, Czech Republic
| | - M Klenivskyi
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic
| | - J Khun
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic
| | - E Vaňková
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic
- Department of Biotechnology, University of Chemistry and Technology, Prague, Czech Republic
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25
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Yi X, Yang D, Xu X, Wang Y, Guo Y, Zhang M, Wang Y, He Y, Zhu J. Cold plasma pretreatment reinforces the lignocellulose-derived aldehyde inhibitors tolerance and bioethanol fermentability for Zymomonas mobilis. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:102. [PMID: 37322470 DOI: 10.1186/s13068-023-02354-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/29/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Lignocellulose-derived aldehyde inhibitors seriously blocked the biorefinery of biofuels and biochemicals. To date, the economic production of lignocellulose-based products heavily relied on high productivities of fermenting strains. However, it was expensive and time-consuming for the achievable rational modification to strengthen stress tolerance robustness of aldehyde inhibitors. Here, it aimed to improve aldehyde inhibitors tolerance and cellulosic bioethanol fermentability for the chassis Zymomonas mobilis ZM4 pretreated using energy-efficient and eco-friendly cold plasma. RESULTS It was found that bioethanol fermentability was weaker in CSH (corn stover hydrolysates) than that in synthetic medium for Z. mobilis, and thus was attributed to the inhibition of the lignocellulose-derived aldehyde inhibitors in CSH. Convincingly, it further confirmed that the mixed aldehydes severely decreased bioethanol accumulation through additional aldehydes supplementary assays in synthetic medium. After assayed under different processing time (10-30 s), discharge power (80-160 W), and working pressure (120-180 Pa) using cold atmosphere plasma (CAP), it achieved the increased bioethanol fermentability for Z. mobilis after pretreated at the optimized parameters (20 s, 140 W and 165 Pa). It showed that cold plasma brought about three mutation sites including ZMO0694 (E220V), ZMO0843 (L471L) and ZMO0843 (P505H) via Genome resequencing-based SNPs (single nucleotide polymorphisms). A serial of differentially expressed genes (DEGs) were further identified as the potential contributors for stress tolerance via RNA-Seq sequencing, including ZMO0253 and ZMO_RS09265 (type I secretion outer membrane protein), ZMO1941 (Type IV secretory pathway protease TraF-like protein), ZMOr003 and ZMOr006 (16S ribosomal RNA), ZMO0375 and ZMO0374 (levansucrase) and ZMO1705 (thioredoxins). It enriched cellular process, followed by metabolic process and single-organism process for biological process. For KEGG analysis, the mutant was also referred to starch and sucrose metabolism, galactose metabolism and two-component system. Finally, but interestingly, it simultaneously achieved the enhanced stress tolerance capacity of aldehyde inhibitors and bioethanol fermentability in CSH for the mutant Z. mobilis. CONCLUSIONS Of several candidate genetic changes, the mutant Z. mobilis treated with cold plasma was conferred upon the facilitated aldehyde inhibitors tolerance and bioethanol production. This work would provide a strain biocatalyst for the efficient production of lignocellulosic biofuels and biochemicals.
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Affiliation(s)
- Xia Yi
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Changzhou University, Changzhou, 213164, China.
- Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China.
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou University, Changzhou, 213164, Jiangsu, China.
| | - Dong Yang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Xiaoyan Xu
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Youjun Wang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Yan Guo
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Meng Zhang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Yilong Wang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Yucai He
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Changzhou University, Changzhou, 213164, China.
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China.
| | - Jie Zhu
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Changzhou University, Changzhou, 213164, China.
- Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China.
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou University, Changzhou, 213164, Jiangsu, China.
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China.
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26
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Mravlje J, Kobal T, Regvar M, Starič P, Zaplotnik R, Mozetič M, Vogel-Mikuš K. The Sensitivity of Fungi Colonising Buckwheat Grains to Cold Plasma Is Species Specific. J Fungi (Basel) 2023; 9:609. [PMID: 37367545 DOI: 10.3390/jof9060609] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 06/28/2023] Open
Abstract
Fungi are the leading cause of plant diseases worldwide and are responsible for enormous agricultural and industrial losses on a global scale. Cold plasma (CP) is a potential tool for eliminating or inactivating fungal contaminants from biological material such as seeds and grains. This study used a low-pressure radiofrequency CP system with oxygen as the feed gas to test the decontamination efficacy of different genera and species commonly colonising buckwheat grains. Two widely accepted methods for evaluating fungal decontamination after CP treatment of seeds were compared: direct cultivation technique or contamination rate method (%) and indirect cultivation or colony-forming units (CFU) method. For most of the tested fungal taxa, an efficient decrease in contamination levels with increasing CP treatment time was observed. Fusarium graminearum was the most susceptible to CP treatment, while Fusarium fujikuroi seems to be the most resistant. The observed doses of oxygen atoms needed for 1-log reduction range from 1024-1025 m-2. Although there was some minor discrepancy between the results obtained from both tested methods (especially in the case of Fusarium spp.), the trends were similar. The results indicate that the main factors affecting decontamination efficiency are spore shape, size, and colouration.
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Affiliation(s)
- Jure Mravlje
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Tanja Kobal
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Marjana Regvar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Pia Starič
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Rok Zaplotnik
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Miran Mozetič
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
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27
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Bennett C, Ngamrung S, Ano V, Umongno C, Mahatheeranont S, Jakmunee J, Nisoa M, Leksakul K, Sawangrat C, Boonyawan D. Comparison of plasma technology for the study of herbicide degradation. RSC Adv 2023; 13:14078-14088. [PMID: 37197673 PMCID: PMC10184135 DOI: 10.1039/d3ra00459g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 04/25/2023] [Indexed: 05/19/2023] Open
Abstract
The study aimed to investigate the effects of two different plasma systems, including pinhole plasma jet and gliding arc (GA) plasma, for the degradation of herbicide, diuron, in plasma activated solutions (PAS). In the GA plasma system, air was used to generate plasma, however, Ar, oxygen and nitrogen at different gas compositions were compared in the pinhole plasma jet system. The Taguchi design model was used to study the effects of gas compositions. Results revealed that the pinhole plasma jet system was able to degrade over 50% of the diuron in 60 minutes. The optimal plasma generation condition for the highest degradation of diuron used pure Ar gas. The highest degradation percentage of herbicide in PAS corresponded to the lowest hydrogen peroxide (H2O2) content, nitrite concentration and electrical conductivity (EC) of the PAS. The diuron degradation products were identified as 3,4-dichloro-benzenamine, 1-chloro-3-isocyanato-benzene and 1-chloro-4-isocyanato-benzene via gas chromatography-mass spectrometry (GC-MS). The GA plasma system was not adequate for the degradation of herbicide in PAS.
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Affiliation(s)
- Chonlada Bennett
- Agriculture and Bio Plasma Technology Center (ABPlas), Science and Technology Park, Chiang Mai University Chiang Mai 50100 Thailand
| | - Sawanya Ngamrung
- Agriculture and Bio Plasma Technology Center (ABPlas), Science and Technology Park, Chiang Mai University Chiang Mai 50100 Thailand
| | - Vithun Ano
- Agriculture and Bio Plasma Technology Center (ABPlas), Science and Technology Park, Chiang Mai University Chiang Mai 50100 Thailand
| | - Chanchai Umongno
- Plasma and Beam Physics Research, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
| | - Sugunya Mahatheeranont
- Department of Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Chiang Mai University Chiang Mai 50200 Thailand
| | - Jaroon Jakmunee
- Department of Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Center of Advanced Materials of Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
| | - Mudtorlep Nisoa
- School of Science, Walailak University Nakhon Si Thammarat 80160 Thailand
| | - Komgrit Leksakul
- Department of Industrial Engineering, Faculty of Engineering, Chiang Mai University Chiang Mai 50200 Thailand
| | - Choncharoen Sawangrat
- Department of Industrial Engineering, Faculty of Engineering, Chiang Mai University Chiang Mai 50200 Thailand
| | - Dheerawan Boonyawan
- Plasma and Beam Physics Research, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University Chiang Mai 50200 Thailand
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28
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Cho SB, Lee S, Yoo DS, Kim SE, Kim T, Zouboulis CC, Lee SE. Cold Atmospheric Plasma Inhibits Lipogenesis and Proliferation of Human Sebocytes and Decreases Sebum Production in Human Facial Skin. Dermatol Ther 2023. [DOI: 10.1155/2023/2922191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Background. Although several energy devices targeting sebaceous glands have been developed, an effective and safe therapeutic tool for hyperseborrhea is still needed. Nonthermal atmospheric-pressure plasma (NTAPP) induces microscopic tissue reactions in sebaceous glands of rat skin. Objective. The aim of the study is to investigate the effects of NTAPP on sebum production in human skin in vivo followed by an experimental study of human sebocytes. Methods. Fourteen healthy volunteers with oily facial skin underwent three sessions of argon- and nitrogen-NTAPP treatment at a 1-week interval and were followed up for 8 weeks. The casual sebum level, sebum excretion rate, and porphyrin index were evaluated. Histological analysis was performed using skin biopsy specimens taken from two subjects at the baseline and week 2. SZ95 sebocytes were stimulated with testosterone and linoleic acid (T/LA) with or without treatment with NTAPP. BODIPY and Nile red staining were used for qualitative lipids analysis. Proliferation and differentiation markers were also assessed. Results. Casual sebum levels and sebum excretion rates in facial skin decreased by 26 and 24%, respectively, at week 4 compared to those of the baseline. Porphyrin index also decreased by 38% at week 2. Histologically, NTAPP-treated human skin showed no obvious thermal injury, but the number of Ki67+ cells in the sebaceous glands decreased at week 2. Argon- and nitrogen-NTAPP attenuated T/LA-induced increases in neutral lipid accumulation, Ki67+ cells, and peroxisome proliferator-activated receptor-ɣ transcription in human sebocytes at energy settings that did not induce apoptosis. Conclusion. Argon- and nitrogen-NTAPP can be a safe and effective therapeutic tool for hyperseborrhea-associated diseases such as acne. This trial is registered with NCT04917835.
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Affiliation(s)
- Sung Bin Cho
- Yonsei Seran Dermatology and Laser Clinic, Seoul, Republic of Korea
| | - Seungju Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Dae San Yoo
- Department of Dermatology and Cutaneous Biology Research Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Song-Ee Kim
- Department of Dermatology and Cutaneous Biology Research Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Taehee Kim
- Department of Dermatology and Cutaneous Biology Research Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Christos C. Zouboulis
- Departments of Dermatology, Venereology, Allergology and Immunology, Staedtisches Klinikum Dessau, Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg, Dessau, Germany
| | - Sang Eun Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
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29
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In-package cold plasma treatment for microbial inactivation in plastic-pouch packaged steamed rice cakes. Int J Food Microbiol 2023; 389:110108. [PMID: 36736172 DOI: 10.1016/j.ijfoodmicro.2023.110108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 01/16/2023] [Accepted: 01/24/2023] [Indexed: 01/28/2023]
Abstract
In-package atmospheric cold plasma (ICP) treatment was investigated as a method to inactivate microorganisms in Korean steamed rice cakes (SRCs) packaged in plastic pouches. The effect against Escherichia coli O157:H7 increased with increasing ICP treatment power and time and using nylon-containing pouches. Moreover, E. coli O157:H7 growth was effectively inhibited at 4 and 25 °C when SRCs were in a pouch filled with an O2-CO2 (70 % and 30 %) gas. Under optimal treatment power (30 W), treatment time (4 min), and headspace-to-SRC volume ratio (7:1) conditions, ICP effectively inactivated E. coli O157:H7, Bacillus cereus spores, Penicillium chrysogenum, and indigenous aerobic bacteria, as well as yeast and molds in SRCs packaged with air in the nylon/low density polyethylene pouch by 2.2 ± 0.2 log CFU/g, 1.4 ± 0.2 log spores/g, 2.2 ± 0.3 log spores/g, 1.1 ± 0.2 log CFU/g, and 1.0 ± 0.1 log CFU/g, respectively. Furthermore, post-treatment storage was effective in preventing the growth of E. coli O157:H7 in SRCs at 4 °C and 25 °C when the pouch was filled with N2-CO2 (50 % and 50 %) or O2-CO2 (70 % and 30 %). Collectively, these findings indicate that ICP treatment effectively decontaminates SRCs and represents a potential non-thermal microbial decontamination technology for SRCs in pouch packaging.
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30
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Zhao Y, Bhavya ML, Patange A, Sun DW, Tiwari BK. Plasma-activated liquids for mitigating biofilms on food and food contact surfaces. Compr Rev Food Sci Food Saf 2023; 22:1654-1685. [PMID: 36861750 DOI: 10.1111/1541-4337.13126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 03/03/2023]
Abstract
Plasma-activated liquids (PALs) are emerging and promising alternatives to traditional decontamination technologies and have evolved as a new technology for applications in food, agriculture, and medicine. Contamination caused by foodborne pathogens and their biofilms has posed challenges and concerns to the food industry in terms of safety and quality. The nature of the food and the food processing environment are major factors that contribute to the growth of various microorganisms, followed by the biofilm characteristics that ensure their survival in severe environmental conditions and against traditional chemical disinfectants. PALs show an efficient impact against microorganisms and their biofilms, with various reactive species (short- and long-lived ones), physiochemical properties, and plasma processing factors playing a crucial role in mitigating biofilms. Moreover, there is potential to improve and optimize disinfection strategies using a combination of PALs with other technologies for the inactivation of biofilms. The overarching aim of this study is to build a better understanding of the parameters that govern the liquid chemistry generated in a liquid exposed to plasma and how these translate into biological effects on biofilms. This review provides a current understanding of PALs-mediated mechanisms of action on biofilms; however, the precise inactivation mechanism is still not clear and is an important part of the research. Implementation of PALs in the food industry could help overcome the disinfection hurdles and can enhance biofilm inactivation efficacy. Future perspectives in this field to expand existing state of the art to seek breakthroughs for scale-up and implementation of PALs technology in the food industry are also discussed.
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Affiliation(s)
- Yunlu Zhao
- Teagasc Food Research Centre, Dublin, Ireland.,Food Refrigeration and Computerised Food Technology (FRCFT), School of Biosystems and Food Engineering, University College Dublin, National University of Ireland, Dublin, Ireland
| | | | | | - Da-Wen Sun
- Food Refrigeration and Computerised Food Technology (FRCFT), School of Biosystems and Food Engineering, University College Dublin, National University of Ireland, Dublin, Ireland
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Zorzi V, Berardinelli A, Gozzi G, Ragni L, Vannini L, Ceccato R, Parrino F. Combined effect of atmospheric gas plasma and UVA light: A sustainable and green alternative for chemical decontamination and microbial inactivation of fish processing water. CHEMOSPHERE 2023; 317:137792. [PMID: 36640987 DOI: 10.1016/j.chemosphere.2023.137792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
The simultaneous use of UVA light irradiation coupled with low energy cold plasma generated by a dielectric barrier discharge prototype, results in significant enhancement of efficiency of the integrated process with respect to the sole plasma treatment. This effect has been demonstrated both on microbial inactivation of a food-borne pathogen, i.e. Listeria monocytogenes, and on the degradation of a compound of biological origin such as phenylalanine. In the latter case, the analysis of its reaction intermediates and the spectroscopic identification and quantification of peroxynitrites, allowed to propose mechanistic hypotheses on the nature of the observed synergistic effects. Moreover, it has been demonstrated that the process does not affect the quality of trout fillets, indicating its suitability as a chlorine-free, green, and sustainable tool for the decontamination of fish processing water.
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Affiliation(s)
- Vittorio Zorzi
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - Annachiara Berardinelli
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy; Center Agriculture Food Environment - C3A, University of Trento, Via E. Mach 1, 38010 S, Michele All'Adige (TN), Italy
| | - Giorgia Gozzi
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, P.zza Goidanich 60, Cesena (FC), Italy
| | - Luigi Ragni
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, P.zza Goidanich 60, Cesena (FC), Italy; Inter-Departmental Centre for Agri-Food Industrial Research, Alma Mater Studiorum, University of Bologna, Via Q. Bucci 336, Cesena (FC), Italy
| | - Lucia Vannini
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, P.zza Goidanich 60, Cesena (FC), Italy; Inter-Departmental Centre for Agri-Food Industrial Research, Alma Mater Studiorum, University of Bologna, Via Q. Bucci 336, Cesena (FC), Italy
| | - Riccardo Ceccato
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - Francesco Parrino
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy.
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Treatment of Ready-To-Eat Cooked Meat Products with Cold Atmospheric Plasma to Inactivate Listeria and Escherichia coli. Foods 2023; 12:foods12040685. [PMID: 36832760 PMCID: PMC9955718 DOI: 10.3390/foods12040685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/24/2023] [Accepted: 01/28/2023] [Indexed: 02/09/2023] Open
Abstract
Ready-to-eat meat products have been identified as a potential vehicle for Listeria monocytogenes. Postprocessing contamination (i.e., handling during portioning and packaging) can occur, and subsequent cold storage together with a demand for products with long shelf life can create a hazardous scenario. Good hygienic practice is augmented by intervention measures in controlling post-processing contamination. Among these interventions, the application of 'cold atmospheric plasma' (CAP) has gained interest. The reactive plasma species exert some antibacterial effect, but can also alter the food matrix. We studied the effect of CAP generated from air in a surface barrier discharge system (power densities 0.48 and 0.67 W/cm2) with an electrode-sample distance of 15 mm on sliced, cured, cooked ham and sausage (two brands each), veal pie, and calf liver pâté. Colour of samples was tested immediately before and after CAP exposure. CAP exposure for 5 min effectuated only minor colour changes (ΔE max. 2.7), due to a decrease in redness (a*), and in some cases, an increase in b*. A second set of samples was contaminated with Listeria (L.) monocytogenes, L. innocua and E. coli and then exposed to CAP for 5 min. In cooked cured meats, CAP was more effective in inactivating E. coli (1 to 3 log cycles) than Listeria (from 0.2 to max. 1.5 log cycles). In (non-cured) veal pie and calf liver pâté that had been stored 24 h after CAP exposure, numbers of E. coli were not significantly reduced. Levels of Listeria were significantly reduced in veal pie that had been stored for 24 h (at a level of ca. 0.5 log cycles), but not in calf liver pâté. Antibacterial activity differed between but also within sample types, which requires further studies.
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Argon Humidification Exacerbates Antimicrobial and Anti-MRSA kINPen Plasma Activity. Life (Basel) 2023; 13:life13020257. [PMID: 36836614 PMCID: PMC9968137 DOI: 10.3390/life13020257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023] Open
Abstract
Gas plasma is a medical technology with antimicrobial properties. Its main mode of action is oxidative damage via reactive species production. The clinical efficacy of gas plasma-reduced bacterial burden has been shown to be hampered in some cases. Since the reactive species profile produced by gas plasma jets, such as the kINPen used in this study, are thought to determine antimicrobial efficacy, we screened an array of feed gas settings in different types of bacteria. Antimicrobial analysis was performed by single-cell analysis using flow cytometry. We identified humidified feed gas to mediate significantly greater toxicity compared to dry argon and many other gas plasma conditions. The results were confirmed by inhibition zone analysis on gas-plasma-treated microbial lawns grown on agar plates. Our results may have vital implications for clinical wound management and potentially enhance antimicrobial efficacy of medical gas plasma therapy in patient treatment.
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Mosaka TBM, Unuofin JO, Daramola MO, Tizaoui C, Iwarere SA. Inactivation of antibiotic-resistant bacteria and antibiotic-resistance genes in wastewater streams: Current challenges and future perspectives. Front Microbiol 2023; 13:1100102. [PMID: 36733776 PMCID: PMC9888414 DOI: 10.3389/fmicb.2022.1100102] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/29/2022] [Indexed: 01/17/2023] Open
Abstract
The discovery of antibiotics, which was once regarded as a timely medical intervention now leaves a bitter aftertaste: antimicrobial resistance (AMR), due to the unregulated use of these compounds and the poor management receiving wastewaters before discharge into pristine environments or the recycling of such treated waters. Wastewater treatment plants (WWTPs) have been regarded a central sink for the mostly unmetabolized or partially metabolised antibiotics and is also pivotal to the incidence of antibiotic resistance bacteria (ARBs) and their resistance genes (ARGs), which consistently contribute to the global disease burden and deteriorating prophylaxis. In this regard, we highlighted WWTP-antibiotics consumption-ARBs-ARGs nexus, which might be critical to understanding the epidemiology of AMR and also guide the precise prevention and remediation of such occurrences. We also discovered the unsophistication of conventional WWTPs and treatment techniques for adequate treatment of antibiotics, ARBs and ARGs, due to their lack of compliance with environmental sustainability, then ultimately assessed the prospects of cold atmospheric plasma (CAP). Herein, we observed that CAP technologies not only has the capability to disinfect wastewater polluted with copious amounts of chemicals and biologicals, but also have a potential to augment bioelectricity generation, when integrated into bio electrochemical modules, which future WWTPs should be retrofitted to accommodate. Therefore, further research should be conducted to unveil more of the unknowns, which only a snippet has been highlighted in this study.
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Affiliation(s)
- Thabang B. M. Mosaka
- Department of Chemical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, Pretoria, South Africa
| | - John O. Unuofin
- Department of Chemical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, Pretoria, South Africa
| | - Michael O. Daramola
- Department of Chemical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, Pretoria, South Africa
| | - Chedly Tizaoui
- Water and Resources Recovery Research Lab, Department of Chemical Engineering, Faculty of Science and Engineering, Swansea University, Swansea, United Kingdom
| | - Samuel A. Iwarere
- Department of Chemical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, Pretoria, South Africa,*Correspondence: Samuel A. Iwarere, ✉
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Sasi S, Prasad K, Weerasinghe J, Bazaka O, Ivanova EP, Levchenko I, Bazaka K. Plasma for aquaponics. Trends Biotechnol 2023; 41:46-62. [PMID: 36085105 DOI: 10.1016/j.tibtech.2022.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 07/15/2022] [Accepted: 08/09/2022] [Indexed: 12/27/2022]
Abstract
Global environmental, social, and economic challenges call for innovative solutions to food production. Current food production systems require advances beyond traditional paradigms, acknowledging the complexity arising from sustainability and a present lack of awareness about technologies that may help limit, for example, loss of nutrients from soil. Aquaponics, a closed-loop system that combines aquaculture with hydroponics, is a step towards the more efficient management of scarce water, land, and nutrient resources. However, its large-scale use is currently limited by several significant challenges of maintaining desirable water chemistry and pH, managing infections in fish and plants, and increasing productivity efficiently, economically, and sustainably. This paper investigates the opportunities presented by plasma technologies in meeting these challenges, potentially opening new pathways for sustainability in food production.
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Affiliation(s)
- Syamlal Sasi
- Product Development, BudMore Pty Ltd, Brisbane, QLD 4000, Australia; School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT 2600, Australia
| | - Karthika Prasad
- Product Development, BudMore Pty Ltd, Brisbane, QLD 4000, Australia; School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT 2600, Australia.
| | - Janith Weerasinghe
- Product Development, BudMore Pty Ltd, Brisbane, QLD 4000, Australia; School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Olha Bazaka
- School of Science, RMIT University, PO Box 2476, Melbourne, Vic 3001, Australia
| | - Elena P Ivanova
- School of Science, RMIT University, PO Box 2476, Melbourne, Vic 3001, Australia
| | - Igor Levchenko
- Plasma Sources and Applications Centre, National Institute of Education, Nanyang Technological University, Singapore 637616
| | - Kateryna Bazaka
- School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT 2600, Australia; School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
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Alonso VPP, Gonçalves MPMBB, de Brito FAE, Barboza GR, Rocha LDO, Silva NCC. Dry surface biofilms in the food processing industry: An overview on surface characteristics, adhesion and biofilm formation, detection of biofilms, and dry sanitization methods. Compr Rev Food Sci Food Saf 2023; 22:688-713. [PMID: 36464983 DOI: 10.1111/1541-4337.13089] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 11/14/2022] [Accepted: 11/18/2022] [Indexed: 12/09/2022]
Abstract
Bacterial biofilm formation in low moisture food processing (LMF) plants is related to matters of food safety, production efficiency, economic loss, and reduced consumer trust. Dry surfaces may appear dry to the naked eye, however, it is common to find a coverage of thin liquid films and microdroplets, known as microscopic surface wetness (MSW). The MSW may favor dry surface biofilm (DSB) formation. DSB formation is similar in other industries, it occurs through the processes of adhesion, production of extracellular polymeric substances, development of microcolonies and maturation, it is mediated by a quorum sensing (QS) system and is followed by dispersal, leading to disaggregation. Species that survive on dry surfaces develop tolerance to different stresses. DSB are recalcitrant and contribute to higher resistance to sanitation, becoming potential sources of contamination, related to the spoilage of processed products and foodborne disease outbreaks. In LMF industries, sanitization is performed using physical methods without the presence of water. Although alternative dry sanitizing methods can be efficiently used, additional studies are still required to develop and assess the effect of emerging technologies, and to propose possible combinations with traditional methods to enhance their effects on the sanitization process. Overall, more information about the different technologies can help to find the most appropriate method/s, contributing to the development of new sanitization protocols. Thus, this review aimed to identify the main characteristics and challenges of biofilm management in low moisture food industries, and summarizes the mechanisms of action of different dry sanitizing methods (alcohol, hot air, UV-C light, pulsed light, gaseous ozone, and cold plasma) and their effects on microbial metabolism.
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Affiliation(s)
- Vanessa Pereira Perez Alonso
- Department of Food Science and Nutrition, School of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Maria Paula M B B Gonçalves
- Department of Food Science and Nutrition, School of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | | | - Giovana Rueda Barboza
- Department of Food Science and Nutrition, School of Food Engineering, University of Campinas, Campinas, SP, Brazil
| | - Liliana de Oliveira Rocha
- Department of Food Science and Nutrition, School of Food Engineering, University of Campinas, Campinas, SP, Brazil
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Sánchez-Bravo P, Noguera-Artiaga L, Gómez-López VM, Carbonell-Barrachina ÁA, Gabaldón JA, Pérez-López AJ. Impact of Non-Thermal Technologies on the Quality of Nuts: A Review. Foods 2022; 11:foods11233891. [PMID: 36496699 PMCID: PMC9739324 DOI: 10.3390/foods11233891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 11/24/2022] [Accepted: 11/30/2022] [Indexed: 12/04/2022] Open
Abstract
Nuts are widely consumed worldwide, mainly due to their characteristic flavor and texture, ease of consumption, and their functional properties. In addition, consumers increasingly demand natural or slightly processed foods with high quality. Consequently, non-thermal treatments are a viable alternative to thermal treatments used to guarantee safety and long shelf life, which produce undesirable changes that affect the sensory quality of nuts. Non-thermal treatments can achieve results similar to those of the traditional (thermal) ones in terms of food safety, while ensuring minimal loss of bioactive compounds and sensory properties, thus obtaining a product as similar as possible to the fresh one. This article focuses on a review of the main non-thermal treatments currently available for nuts (cold plasma, high pressure, irradiation, pulsed electric field, pulsed light, ultrasound and ultraviolet light) in relation to their effects on the quality and safety of nuts. All the treatments studied have shown promise with regard to the inhibition of the main microorganisms affecting nuts (e.g., Aspergillus, Salmonella, and E. coli). Furthermore, by optimizing the treatment, it is possible to maintain the organoleptic and functional properties of these products.
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Affiliation(s)
- Paola Sánchez-Bravo
- Laboratory of Fitoquímica y Alimentos Saludables (LabFAS), CEBAS-CSIC, University of Murcia, 25, 30100 Murcia, Spain
- Department of AgroFood Technology, Miguel Hernandez University, Carretera de Beniel, km 3.2, 03312 Orihuela, Spain
| | - Luis Noguera-Artiaga
- Department of AgroFood Technology, Miguel Hernandez University, Carretera de Beniel, km 3.2, 03312 Orihuela, Spain
| | - Vicente M. Gómez-López
- Catedra Alimentos Para la Salud, Campus de los Jerónimos, Universidad Católica San Antonio de Murcia (UCAM), 30107 Murcia, Spain
| | | | - José A. Gabaldón
- Catedra Alimentos Para la Salud, Campus de los Jerónimos, Universidad Católica San Antonio de Murcia (UCAM), 30107 Murcia, Spain
| | - Antonio J. Pérez-López
- Department of Food Technology and Nutrition, Catholic University of San Antonio, Campus de los Jerónimos s/n, 30107 Murcia, Spain
- Correspondence: ; Tel.: +34-968-278-622
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Wang Q, Lavoine N, Salvi D. Cold atmospheric pressure plasma for the sanitation of conveyor belt materials: Decontamination efficacy against adherent bacteria and biofilms of Escherichia coli and effect on surface properties. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Paulsen P, Csadek I, Bauer A, Bak KH, Weidinger P, Schwaiger K, Nowotny N, Walsh J, Martines E, Smulders FJM. Treatment of Fresh Meat, Fish and Products Thereof with Cold Atmospheric Plasma to Inactivate Microbial Pathogens and Extend Shelf Life. Foods 2022; 11:foods11233865. [PMID: 36496672 PMCID: PMC9740106 DOI: 10.3390/foods11233865] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 12/03/2022] Open
Abstract
Assuring the safety of muscle foods and seafood is based on prerequisites and specific measures targeted against defined hazards. This concept is augmented by 'interventions', which are chemical or physical treatments, not genuinely part of the production process, but rather implemented in the framework of a safety assurance system. The present paper focuses on 'Cold Atmospheric pressure Plasma' (CAP) as an emerging non-thermal intervention for microbial decontamination. Over the past decade, a vast number of studies have explored the antimicrobial potential of different CAP systems against a plethora of different foodborne microorganisms. This contribution aims at providing a comprehensive reference and appraisal of the latest literature in the area, with a specific focus on the use of CAP for the treatment of fresh meat, fish and associated products to inactivate microbial pathogens and extend shelf life. Aspects such as changes to organoleptic and nutritional value alongside other matrix effects are considered, so as to provide the reader with a clear insight into the advantages and disadvantages of CAP-based decontamination strategies.
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Affiliation(s)
- Peter Paulsen
- Unit of Food Hygiene and Technology, Institute of Food Safety, Food Technology and Veterinary Public Health, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Isabella Csadek
- Unit of Food Hygiene and Technology, Institute of Food Safety, Food Technology and Veterinary Public Health, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | | | - Kathrine H. Bak
- Unit of Food Hygiene and Technology, Institute of Food Safety, Food Technology and Veterinary Public Health, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Pia Weidinger
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Karin Schwaiger
- Unit of Food Hygiene and Technology, Institute of Food Safety, Food Technology and Veterinary Public Health, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Norbert Nowotny
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
- Department of Basic Medical Sciences, College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates
| | - James Walsh
- Centre for Plasma Microbiology, University of Liverpool, Liverpool L69 3BX, UK
| | - Emilio Martines
- Department of Physics “G. Occhialini”, University of Milano—Bicocca, Piazza della Scienza 3, 20126 Milano, Italy
| | - Frans J. M. Smulders
- Unit of Food Hygiene and Technology, Institute of Food Safety, Food Technology and Veterinary Public Health, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
- Correspondence: ; Tel.: +43-1-25077-3318
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Jiang H, Lin Q, Shi W, Yu X, Wang S. Food preservation by cold plasma from dielectric barrier discharges in agri-food industries. Front Nutr 2022; 9:1015980. [PMID: 36466425 PMCID: PMC9709125 DOI: 10.3389/fnut.2022.1015980] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 10/26/2022] [Indexed: 11/15/2023] Open
Abstract
BACKGROUND Cold plasma (CP) can be defined as partially or wholly ionized gas carrying myriads of highly reactive products, such as electrons, negative ions, positive ions, free radicals, excited or non-excited atoms, and photons at ambient temperature. It is generated at 30-60°C under atmospheric or reduced pressure (vacuum). In contrast to thermal plasma, it requires less power, exhibits electron temperatures much higher than the corresponding gas (macroscopic temperature), and does not present a local thermodynamic equilibrium. Dielectric barrier discharges (DBD) are one of the most convenient and efficient methods to produce CP. SCOPE AND APPROACH Cold plasma technology has the potential to replace traditional agri-food processing purification methods because of its low energy requirements and flexible system design. CP technology works by reducing bacteria levels and removing pests and mycotoxins from your produce at harvest. It can also catalyze physiological and biochemical reactions and modify materials. It can meet microbial food safety standards, improve the physical, nutritional, and sensory characteristics of the products, preserve unstable bioactive compounds, and modulate enzyme activities. This manuscript also discusses the quality characteristics of food components before/after CP treatment. KEY FINDINGS AND CONCLUSION In the past decade, CP treatments of food products have experienced increased popularity due to their potential contributions to non-thermal food processing. There is no doubt that CP treatment is a flexible approach with demonstrated efficacy for controlling many risks across food and agricultural sustainability sectors. In addition, CP technologies also can be applied in food-related areas, including modification of chemical structures and desensitization treatments. There is a need to fully assess the benefits and risks of stand-alone CP unit processes or their integration as a processing chain as soon as the economic, ecological, and consumer benefits and acceptability are considered.
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Affiliation(s)
- Hao Jiang
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China
| | - Qian Lin
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China
| | - Wenqing Shi
- Shanxi Rural Science and Technology Development Centre, Xi’an, China
| | - Xiuzhu Yu
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China
| | - Shaojin Wang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang, China
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Effect of the pH on the Antibacterial Potential and Cytotoxicity of Different Plasma-Activated Liquids. Int J Mol Sci 2022; 23:ijms232213893. [PMID: 36430372 PMCID: PMC9693261 DOI: 10.3390/ijms232213893] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 11/06/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, different plasma-activated liquids were evaluated for their antimicrobial effects against Escherichia coli, as well as for their cytotoxicity on mammalian cells. The PALs were prepared from distilled (DIS), deionized (DI), filtered (FIL), and tap (TAP) water. Additionally, 0.9% NaCl saline solution (SAL) was plasma-activated. These PALs were prepared using 5 L/min air gliding arc plasma jet for up to 60.0 min of exposure. Subsequently, the physicochemical properties, such as, the oxidation-reduction potential (ORP), the pH, the conductivity, and the total dissolved solids (TDS) were characterized by a water multiparameter. The PALs obtained showed a drastic decrease in the pH with increasing plasma exposure time, in contrast, the conductivity and TDS increased. In a general trend, the UV-vis analyses identified a higher production of the following reactive species of nitrogen and oxygen (RONS), HNO2, H2O2, NO3-, and NO2-. Except for the plasma-activated filtered water (PAW-FIL), where there was a change in the position of NO2- and NO3- at some pHs, The higher production of HNO2 and H2O2-reactive species was observed at a low pH. Finally, the standardized suspensions of Escherichia coli were exposed to PAL for up to 60.0 min. The plasma-activated deionized water (PAW-DI pH 2.5), plasma-activated distilled water (PAW-DIS pH 2.5 and 3), and plasma-activated tap water (PAW-TAP 3.5) showed the best antimicrobial effects at exposure times of 3.0, 10.0, and 30.0 min, respectively. The MTT analysis demonstrated low toxicity of all of the PAL samples. Our results indicate that the plasma activation of different liquids using the gliding arc system can generate specific physicochemical conditions that produce excellent antibacterial effects for E. coli with a safe application, thus bringing future contributions to creating new antimicrobial protocols.
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Zhao W, Alwahabi ZT. Two‐dimensional imaging of excited N2 molecules produced in an air purification device. J Vis (Tokyo) 2022. [DOI: 10.1007/s12650-022-00895-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Moula Ali AM, Sant'Ana AS, Bavisetty SCB. Sustainable preservation of cheese: Advanced technologies, physicochemical properties and sensory attributes. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Das S, Mohapatra S, Kar S, Bhatt S, Pundir S. Reactive species variation in cold atmospheric pressure plasma jet discharge under the influence of intrinsic parameters and its effect on E. coli inactivation. Biointerphases 2022; 18:061003. [PMID: 38078794 DOI: 10.1116/6.0003042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 11/14/2023] [Indexed: 12/18/2023] Open
Abstract
Cold atmospheric pressure plasma jet (CAPJ) has piqued the interest of researchers for various antimicrobial applications such as disinfection, wound decontamination, etc. In the current context, a deeper understanding of the correlation between CAPJ's intrinsic parameters, discharge characteristics, species composition, and antimicrobial activity is required for any successful application. This research evaluated the effect of intrinsic operational parameters such as voltage, frequency, gas flow rate, and operating gas on the reactive species composition of an in-house-developed CAPJ discharge along with the antimicrobial activity. It was observed that the identified excited atoms (Ar I, He I, N2, and O I), ions (Ar+, N2+, N+, H2O+, H3O+, etc.), radical reactive oxygen and nitrogen species (RONS) (OH•), and nonradical RONS (O I, O+, OH+, NO+, O2+, O2-, NO2-, N2O2-, NO3-, N2O3-, etc.) might play a synergistic role in bacterial inactivation via oxidative and electrostatic stress. The variation in voltage, frequency, gas flow rate, and operating gas influenced the discharge chemistry, leading to variation in bacterial inactivation. The reactive species in the discharge responsible for such variation was evaluated extensively. This investigation into various operational parameters would aid in determining the most effective settings for a developed CAPJ to achieve high productivity.
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Affiliation(s)
- Sarthak Das
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Sarita Mohapatra
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, New Delhi 110016, India
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Satyananda Kar
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, New Delhi 110016, India
- Department of Energy Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Satyendra Bhatt
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Swati Pundir
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India
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Comparison of the Effect of Cold Plasma with Conventional Preservation Methods on Red Wine Quality Using Chemometrics Analysis. Molecules 2022; 27:molecules27207048. [PMID: 36296642 PMCID: PMC9609338 DOI: 10.3390/molecules27207048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/07/2022] [Accepted: 10/17/2022] [Indexed: 11/17/2022] Open
Abstract
In this study, the effect of cold plasma (CP) on the physicochemical and biological properties of red wine was investigated in comparison with the effects of the conventional preservation method and the combined method. In addition, the effect of storage time after the application of each of the analyzed methods was evaluated. The study examined the effects of the different preservation methods on the pH, color, phenolic content, antioxidant activity and microbiological purity of the red wine. Chemometric analysis was used to discover the relationship between the preservation method used and wine quality. In the wine samples tested, a reduction in phenolic compounds and a decrease in antioxidant activity were noted after storage. This effect was mildest for preservation methods with the addition of potassium metabisulphite and those in which a mixture of helium and nitrogen was used as the working gas. On a positive note, the CP treatment did not affect the color of the wine in a way perceptible to the consumer: ∆E*—1.12 (He/N2; 5 min). In addition, the lowest growth of microorganisms was detected in the CP-treated samples. This indicates the potential of cold plasma as an alternative method to the use of potassium metabisulfite in wine production, which may contribute to its wider use in the alcohol industry in the future.
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Efficacy of Cold Atmospheric Plasma Therapy on Chronic Wounds: An Updated Systematic Review and Meta-Analysis of RCTs. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:5798857. [PMID: 36262869 PMCID: PMC9576403 DOI: 10.1155/2022/5798857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/26/2022] [Indexed: 11/22/2022]
Abstract
Objective A previous meta-analysis has revealed that cold atmospheric plasma (CAP) might not be clinically beneficial to chronic wounds. However, several new randomized controlled trials (RCTs) reported that CAP was an effective treatment option for accelerating wound healing in chronic wounds. The purpose of this review is to incorporate these new results and evaluate the efficacy of CAP in chronic wounds. Methods The major databases, including PubMed, Embase, Cochrane Library, and Web of Science, were searched for articles related to CAP treatment in chronic wounds until March 21, 2022. The literature retrieval and evaluation were carried out by two independent researchers. Result A total of 13 randomized clinical trials published between 2010 and 2022 were finally included. CAP therapy showed to be more effective in reducing the area of wounds (mean difference (MD): -1.74, 95%; confidence interval (CI): [-3.14, -0.33], p = 0.02), compared with non-CAP treatments. The immediate reduction of the bacterial load was higher in the CAP group than in the control group. (MD: -0.37, 95%; CI: [-0.7, -0.05], p = 0.02). Conclusion No significant changes were found in long-term antibacterial efficacy and pain perception between the two groups. However, more RCTs of excellent methodological quality are required to confirm technical details of the source of AP and the appropriate duration of the treatment with plasma.
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Boonyawan D, Lamasai K, Umongno C, Rattanatabtimtong S, Yu L, Kuensaen C, Maitip J, Thana P. Surface dielectric barrier discharge plasma-treated pork cut parts: bactericidal efficacy and physiochemical characteristics. Heliyon 2022; 8:e10915. [PMID: 36247123 PMCID: PMC9561744 DOI: 10.1016/j.heliyon.2022.e10915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 03/09/2022] [Accepted: 09/28/2022] [Indexed: 11/30/2022] Open
Abstract
Maintaining agro-food product safety remains a significant challenge for satisfying local and global consumers in tropical countries. This issue has been growing due to new pathogen strains, low infectious doses, increased virulence, antibiotic resistance, cross-contamination or recontamination of foods, food-contact surfaces, and biocontamination of water within the food production chain. To respond to this situation, we studied the inactivation efficacy of surface dielectric barrier discharge (SDBD) plasma against pathogens on the surface of various pork cut parts, including the loin, hip, belly, liver, and intestine. The SDBD plasma was operated at 0.30 W/cm2 in ambient air, with a gap of 5.0 mm between the plasma generator and the sample surface. Up to 96% germicidal efficiency against surface pathogens were observed, showing after 1 min of SDBD plasma exposure. Visualization of reactive species deposition on the treated surface using KI-starch agar gel reagent indicated a non-uniform distribution of the SDBD-generated reactive species on the treated surface. Following the indirect plasma treatment by the SDBD reactor, the overall color of pork cut samples after plasma treatment was significantly different compared with before. However, the surface morphology and structural characterization of the treated pork cut samples were not significantly altered, and residual nitrites and nitrates were lower than the restriction level for safe consumption. The SDBD reactor should be developed further to produce a uniform distribution of reactive species on the meat surface for the improvement of the decontamination effect without undesirable effects on meat quality parameters.
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Affiliation(s)
- D. Boonyawan
- Plasma and Beam Physics Research Facility, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - K. Lamasai
- Doctor of Philosophy Program in Nanoscience and Nanotechnology (International Program/Interdisciplinary), Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - C. Umongno
- Plasma and Beam Physics Research Facility, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - S. Rattanatabtimtong
- Department of Animal Science, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand
| | - L.D. Yu
- Plasma and Beam Physics Research Facility, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - C. Kuensaen
- International College of Digital Innovation, Chiang Mai University, Chiang Mai 50200, Thailand
| | - J. Maitip
- Faculty of Science, Energy and Environment, King Mongkut’s University of Technology North Bangkok, Rayong Campus, Rayong 21120, Thailand
| | - P. Thana
- Faculty of Science, Energy and Environment, King Mongkut’s University of Technology North Bangkok, Rayong Campus, Rayong 21120, Thailand,Corresponding author.
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Mrochen DM, Miebach L, Skowski H, Bansemer R, Drechsler CA, Hofmanna U, Hein M, Mamat U, Gerling T, Schaible U, von Woedtke T, Bekeschus S. Toxicity and virucidal activity of a neon-driven micro plasma jet on eukaryotic cells and a coronavirus. Free Radic Biol Med 2022; 191:105-118. [PMID: 36041652 PMCID: PMC9420207 DOI: 10.1016/j.freeradbiomed.2022.08.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 08/06/2022] [Accepted: 08/15/2022] [Indexed: 11/29/2022]
Abstract
Plasma medicine is a developing field that utilizes the effects of cold physical plasma on biological substrates for therapeutic purposes. Approved plasma technology is frequently used in clinics to treat chronic wounds and skin infections. One mode of action responsible for beneficial effects in patients is the potent antimicrobial activity of cold plasma systems, which is linked to their unique generation of a plethora of reactive oxygen and nitrogen species (ROS). During the SARS-CoV-2 pandemic, it became increasingly clear that societies need novel ways of passive and active protection from viral airway infections. Plasma technology may be suitable for superficial virus inactivation. Employing an optimized neon-driven micro plasma jet, treatment time-dependent ROS production and cytotoxic effects to different degrees were found in four different human cell lines with respect to their metabolic activity and viability. Using the murine hepatitis virus (MHV), a taxonomic relative of human coronaviruses, plasma exposure drastically reduced the number of infected murine fibroblasts by up to 3000-fold. Direct plasma contact (conductive) with the target maximized ROS production, cytotoxicity, and antiviral activity compared to non-conductive treatment with the remote gas phase only. Strikingly, antioxidant pretreatment reduced but not abrogated conductive plasma exposure effects, pointing to potential non-ROS-related mechanisms of antiviral activity. In summary, an optimized micro plasma jet showed antiviral activity and cytotoxicity in human cells, which was in part ROS-dependent. Further studies using more complex tissue models are needed to identify a safe dose-effect window of antiviral activity at modest toxicity.
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Affiliation(s)
- Daniel M Mrochen
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
| | - Lea Miebach
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany; Department of General, Visceral, Vascular, and Thoracic Surgery, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str., 17475, Greifswald, Germany
| | - Henry Skowski
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
| | - Robert Bansemer
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
| | - Chiara A Drechsler
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany; Department of Obstetrics and Gynecology, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str., 17475, Greifswald, Germany
| | - Ulfilas Hofmanna
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
| | - Manuel Hein
- Department of Cellular Microbiology, Program Area Infections, Research Center Borstel, Leibniz Lung Center, Parkallee, 23845, Borstel, Germany
| | - Uwe Mamat
- Department of Cellular Microbiology, Program Area Infections, Research Center Borstel, Leibniz Lung Center, Parkallee, 23845, Borstel, Germany; Leibniz Research Alliance INFECTIONS, Germany
| | - Torsten Gerling
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
| | - Ulrich Schaible
- Department of Cellular Microbiology, Program Area Infections, Research Center Borstel, Leibniz Lung Center, Parkallee, 23845, Borstel, Germany; Leibniz Research Alliance INFECTIONS, Germany; Leibniz Research Alliance HEALTH TECHNOLOGIES, Germany
| | - Thomas von Woedtke
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany; Institute for Hygiene and Environmental Medicine, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str., 17475, Greifswald, Germany; Leibniz Research Alliance HEALTH TECHNOLOGIES, Germany
| | - Sander Bekeschus
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany; Leibniz Research Alliance HEALTH TECHNOLOGIES, Germany.
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Katsigiannis AS, Hojnik N, Modic M, Bayliss DL, Kovač J, Walsh JL. Continuous in-line decontamination of food-processing surfaces using cold atmospheric pressure air plasma. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wang LH, Chen L, Zhao S, Huang Y, Zeng XA, Aadil RM. Inactivation efficacy and mechanisms of atmospheric cold plasma on Alicyclobacillus acidoterrestris: Insight into the influence of growth temperature on survival. Front Nutr 2022; 9:1012901. [PMID: 36185645 PMCID: PMC9521650 DOI: 10.3389/fnut.2022.1012901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 08/15/2022] [Indexed: 11/21/2022] Open
Abstract
The bactericidal effect of dielectric barrier discharge-atmospheric cold plasma (DBD-ACP, 20, and 30 kV) against Alicyclobacillus acidoterrestris on the saline solution and apple juice was investigated. Results show that DBD-ACP is effective for the inactivation of A. acidoterrestris by causing significant changes in cell membrane permeability and bacterial morphology. The effect of culture temperatures on the resistance of A. acidoterrestris to DBD-ACP was also studied. A. acidoterrestris cells grown at 25°C had the lowest resistance but it was gradually increased as the culture temperature was increased (25–45°C) (p < 0.05). Moreover, results from Fourier transform infrared spectroscopy (FT-IR) and Gas Chromatography-Mass Spectrometer (GC-MS) analysis showed that the increase in the culture temperature can gradually cause the decreased level of cyclohexaneundecanoic acid in the cell membrane of A. acidoterrestris (p < 0.05). In contrast, cyclopentaneundecanoic acid, palmitic acid, and stearic acid showed an increasing trend in which the fluidity of the bacterial cell membrane decreased. This study shows a specific correlation between the resistance of A. acidoterrestris and the fatty acid composition of the cell membrane to DBD-ACP.
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Affiliation(s)
- Lang-Hong Wang
- School of Food Science and Engineering, Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, China
- College of Food Science and Technology and College of Life Sciences, Northwest University, Xi'an, China
| | - Lin Chen
- College of Food Science and Technology and College of Life Sciences, Northwest University, Xi'an, China
| | - Siqi Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Yanyan Huang
- School of Food Science and Engineering, Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, China
- *Correspondence: Yanyan Huang
| | - Xin-An Zeng
- School of Food Science and Engineering, Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, China
- Xin-An Zeng
| | - Rana Muhammad Aadil
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan
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