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Kenzhekhanova M, Mukhametov A, Gaisin I, Mamayeva L. Multimodal intelligent approach to low-temperature atmospheric plasma processing of apple slices before drying. FOOD SCI TECHNOL INT 2024:10820132241274966. [PMID: 39169785 DOI: 10.1177/10820132241274966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
This study presents a comprehensive analysis of the impact of plasma treatment on the browning inhibition. A 30 min plasma treatment resulted in a pronounced decrease in the concentration of flavan-3-ols, which play a pivotal role in antioxidant defense and browning prevention. This significant reduction is likely due to plasma-induced oxidative stress, which can lead to the breakdown of these compounds or their conversion into other phenolic structures. Simultaneously, a slight increase in dihydrochalcones and flavonols was observed, suggesting a selective effect of plasma on different phenolic classes. The increase in these compounds could be attributed to the plasma's ability to induce specific reactions that generate these phenolics from other precursors present in the apples. The reduction in flavan-3-ols may affect the antioxidant capacity and health benefits associated with the apples, while the increase in dihydrochalcones and flavonols could have a positive impact on the flavor profile and potential health-promoting properties. Moreover, these modifications could contribute to the extension of shelf-life and maintenance of sensory qualities, making plasma treatment a valuable tool in the food industry for enhancing product stability and consumer appeal.
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Affiliation(s)
- Mereke Kenzhekhanova
- Department of Technology and Food Safety, Kazakh National Agrarian Research University, Almaty, Kazakhstan
| | - Almas Mukhametov
- Department of Technology and Food Safety, Kazakh National Agrarian Research University, Almaty, Kazakhstan
| | - Irek Gaisin
- Department of High-Energy Processes and Assemblies, Naberezhnye Chelny Institute (branch) Kazan Federal University, Naberezhnye Chelny, Russia
| | - Laura Mamayeva
- Department of Technology and Food Safety, Kazakh National Agrarian Research University, Almaty, Kazakhstan
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The Impact of Plasma Activated Water Treatment on the Phenolic Profile, Vitamins Content, Antioxidant and Enzymatic Activities of Rocket-Salad Leaves. Antioxidants (Basel) 2022; 12:antiox12010028. [PMID: 36670890 PMCID: PMC9854496 DOI: 10.3390/antiox12010028] [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: 11/15/2022] [Revised: 12/12/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
Plasma activated water (PAW) recently received much attention as an alternative food preservation method. However, its effects on food quality are still scarce. This study evaluates the effect of PAW processing time on bioactive compounds of rocket-salad leaves including: 18 phenolic compounds, vitamin C, riboflavin, nicotinic acid, and nicotinamide. Moreover, the impact of PAW on both antioxidant (DPPH) and peroxidase (POD) activities was also investigated. This was performed using HPLC-DAD, HPLC-MS/MS, and spectrophotometric analysis. All treatments induced non-significant increases in total phenolic contents. However, depending on processing time, significant increases or decreases of individual phenolic compounds were observed. PAW-10 and -20 increased the ascorbic acid content to 382.76 and 363.14 mg/100 g, respectively, compared to control (337.73 mg/100 g). Riboflavin and nicotinic acid contents were increased significantly in PAW-20 (0.53 and 1.26 mg/100), compared to control (0.32 and 0.61 mg/100 g, respectively). However, nicotinamide showed non-significant increase in all treatments. Antioxidant activity improved significantly only in PAW-20, while peroxidase activity was reduced up to 36% in the longest treatment. In conclusion, PAW treatment could be an effective technique for rocket decontamination since it positively influenced the quality of rocket, improving the retention of polyphenols and vitamins.
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3
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Salunkhe VN, Gedam P, Pradhan A, Gaikwad B, Kale R, Gawande S. Concurrent waterlogging and anthracnose-twister disease in rainy-season onions ( Allium cepa): Impact and management. Front Microbiol 2022; 13:1063472. [PMID: 36569050 PMCID: PMC9773214 DOI: 10.3389/fmicb.2022.1063472] [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: 10/07/2022] [Accepted: 11/16/2022] [Indexed: 12/13/2022] Open
Abstract
Waterlogging and anthracnose-twister disease are significant obstacles in rainy-season onion cultivation. As a shallow-rooted crop, onions are highly sensitive to waterlogging. Wherever rainy-season onion cultivation has been undertaken, the anthracnose-twister disease complex is also widespread across the world in addition to waterlogging. Waterlogging is the major predisposing factor for anthracnose and other fungal diseases. However, studies on the combined stress impact on onions have been ignored. In the present review, we have presented an overview of the anthracnose-twister disease, the waterlogging effect on host physiology, host-pathogen interaction under waterlogging stress, and appropriate management strategies to mitigate the combined stress effects. Crucial soil and crop management strategies can help cope with the negative impact of concurrent stresses. Raised bed planting with drip irrigation, the use of plant bio-regulators along with nutrient management, and need-based fungicide sprays would be the most reliable and feasible management options. The most comprehensive solution to withstand combined stress impacts would be a genetic improvement of commercial onion cultivars.
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Affiliation(s)
- Vanita Navnath Salunkhe
- Division of Crop Protection, Indian Council of Agricultural Research (ICAR)-Directorate of Onion and Garlic Research, Pune, Maharashtra, India,School of Soil Stress Management, Indian Council of Agricultural Research (ICAR)-National Institute of Abiotic Stress Management, Baramati, Maharashtra, India
| | - Pranjali Gedam
- Division of Crop Protection, Indian Council of Agricultural Research (ICAR)-Directorate of Onion and Garlic Research, Pune, Maharashtra, India
| | - Aliza Pradhan
- School of Soil Stress Management, Indian Council of Agricultural Research (ICAR)-National Institute of Abiotic Stress Management, Baramati, Maharashtra, India
| | - Bhaskar Gaikwad
- School of Soil Stress Management, Indian Council of Agricultural Research (ICAR)-National Institute of Abiotic Stress Management, Baramati, Maharashtra, India
| | - Rajiv Kale
- Division of Crop Protection, Indian Council of Agricultural Research (ICAR)-Directorate of Onion and Garlic Research, Pune, Maharashtra, India
| | - Suresh Gawande
- Division of Crop Protection, Indian Council of Agricultural Research (ICAR)-Directorate of Onion and Garlic Research, Pune, Maharashtra, India,*Correspondence: Suresh Gawande
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Weihe T, Wagner R, Schnabel U, Andrasch M, Su Y, Stachowiak J, Noll HJ, Ehlbeck J. Microbial Control of Raw and Cold-Smoked Atlantic Salmon ( Salmo salar) through a Microwave Plasma Treatment. Foods 2022; 11:3356. [PMID: 36359968 PMCID: PMC9655028 DOI: 10.3390/foods11213356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/19/2022] [Accepted: 10/21/2022] [Indexed: 09/08/2024] Open
Abstract
The control of the pathogenic load on foodstuffs is a key element in food safety. Particularly, seafood such as cold-smoked salmon is threatened by pathogens such as Salmonella sp. or Listeria monocytogenes. Despite strict existing hygiene procedures, the production industry constantly demands novel, reliable methods for microbial decontamination. Against that background, a microwave plasma-based decontamination technique via plasma-processed air (PPA) is presented. Thereby, the samples undergo two treatment steps, a pre-treatment step where PPA is produced when compressed air flows over a plasma torch, and a post-treatment step where the PPA acts on the samples. This publication embraces experiments that compare the total viable count (tvc) of bacteria found on PPA-treated raw (rs) and cold-smoked salmon (css) samples and their references. The tvc over the storage time is evaluated using a logistic growth model that reveals a PPA sensitivity for raw salmon (rs). A shelf-life prolongation of two days is determined. When cold-smoked salmon (css) is PPA-treated, the treatment reveals no further impact. When PPA-treated raw salmon (rs) is compared with PPA-untreated cold-smoked salmon (css), the PPA treatment appears as reliable as the cold-smoking process and retards the growth of cultivable bacteria in the same manner. The experiments are flanked by quality measurements such as color and texture measurements before and after the PPA treatment. Salmon samples, which undergo an overtreatment, solely show light changes such as a whitish surface flocculation. A relatively mild treatment as applied in the storage experiments has no further detected impact on the fish matrix.
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Affiliation(s)
- Thomas Weihe
- Leibniz-Institute for Plasma Science and Technology, 17489 Greifswald, Germany
| | - Robert Wagner
- Leibniz-Institute for Plasma Science and Technology, 17489 Greifswald, Germany
| | - Uta Schnabel
- Leibniz-Institute for Plasma Science and Technology, 17489 Greifswald, Germany
| | | | - Yukun Su
- Institute for Sports Science, University of Rostock, 18051 Rostock, Germany
| | - Jörg Stachowiak
- Leibniz-Institute for Plasma Science and Technology, 17489 Greifswald, Germany
| | | | - Jörg Ehlbeck
- Leibniz-Institute for Plasma Science and Technology, 17489 Greifswald, Germany
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Dharini M, Jaspin S, Mahendran R. Cold plasma reactive species: Generation, properties, and interaction with food biomolecules. Food Chem 2022; 405:134746. [DOI: 10.1016/j.foodchem.2022.134746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 10/16/2022] [Accepted: 10/23/2022] [Indexed: 11/30/2022]
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Roy PK, Jeon EB, Park SY. Effects of nonthermal dielectric barrier discharge plasma against
Listeria monocytogenes
and quality of smoked salmon fillets. J Food Saf 2022. [DOI: 10.1111/jfs.13012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Pantu Kumar Roy
- Institute of Marine Industry, Department of Seafood Science and Technology Gyeongsang National University Tongyeong Republic of Korea
| | - Eun Bi Jeon
- Institute of Marine Industry, Department of Seafood Science and Technology Gyeongsang National University Tongyeong Republic of Korea
| | - Shin Young Park
- Institute of Marine Industry, Department of Seafood Science and Technology Gyeongsang National University Tongyeong Republic of Korea
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7
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Cold plasma effects on the nutrients and microbiological quality of sprouts. Food Res Int 2022; 159:111655. [DOI: 10.1016/j.foodres.2022.111655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 11/17/2022]
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Mildaziene V, Ivankov A, Sera B, Baniulis D. Biochemical and Physiological Plant Processes Affected by Seed Treatment with Non-Thermal Plasma. PLANTS (BASEL, SWITZERLAND) 2022; 11:856. [PMID: 35406836 PMCID: PMC9003542 DOI: 10.3390/plants11070856] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 12/22/2022]
Abstract
Among the innovative technologies being elaborated for sustainable agriculture, one of the most rapidly developing fields relies on the positive effects of non-thermal plasma (NTP) treatment on the agronomic performance of plants. A large number of recent publications have indicated that NTP effects are far more persistent and complex than it was supposed before. Knowledge of the molecular basis and the resulting outcomes of seed treatment with NTP is rapidly accumulating and requires to be analyzed and presented in a systematic way. This review focuses on the biochemical and physiological processes in seeds and plants affected by seed treatment with NTP and the resulting impact on plant metabolism, growth, adaptability and productivity. Wide-scale changes evolving at the epigenomic, transcriptomic, proteomic and metabolic levels are triggered by seed irradiation with NTP and contribute to changes in germination, early seedling growth, phytohormone amounts, metabolic and defense enzyme activity, secondary metabolism, photosynthesis, adaptability to biotic and abiotic stress, microbiome composition, and increased plant fitness, productivity and growth on a longer time scale. This review highlights the importance of these novel findings, as well as unresolved issues that remain to be investigated.
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Affiliation(s)
- Vida Mildaziene
- Faculty of Natural Sciences, Vytautas Magnus University, LT-44404 Kaunas, Lithuania;
| | - Anatolii Ivankov
- Faculty of Natural Sciences, Vytautas Magnus University, LT-44404 Kaunas, Lithuania;
| | - Bozena Sera
- Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University in Bratislava, 84215 Bratislava, Slovakia;
| | - Danas Baniulis
- Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, LT-54333 Babtai, Lithuania;
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Aqueous and gaseous plasma applications for the treatment of mung bean seeds. Sci Rep 2021; 11:19681. [PMID: 34608179 PMCID: PMC8490402 DOI: 10.1038/s41598-021-97823-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 08/13/2021] [Indexed: 01/05/2023] Open
Abstract
Sprouts are particularly prone to microbial contamination due to their high nutrient content and the warm temperatures and humid conditions needed for their production. Therefore, disinfection is a crucial step in food processing as a means of preventing the transmission of bacterial, parasitic and viral pathogens. In this study, a dielectric coplanar surface barrier discharge (DCSBD) system was used for the application of cold atmospheric plasma (CAP), plasma activated water (PAW) and their combination on mung bean seeds. Germination assessments were performed in a test tube set-up filled with glass beads and the produced irrigation water. Overall, it was found that the combined seed treatment with direct air CAP (350 W) and air PAW had no negative impact on mung bean seed germination and growth, nor the concentration of secondary metabolites within the sprouts. These treatments also reduced the total microbial population in sprouts by 2.5 log CFU/g. This research reports for first time that aside from the stimulatory effect of plasma discharge on seed surface disinfection, sustained plasma treatment through irrigation of treated seeds with PAW can significantly enhance seedling growth. The positive outcome and further applications of different forms, of plasma i.e., gaseous and aqueous, in the agro-food industry is further supported by this research.
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10
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Effects of Non-Thermal Plasma Treatment on Seed Germination and Early Growth of Leguminous Plants-A Review. PLANTS 2021; 10:plants10081616. [PMID: 34451662 PMCID: PMC8401949 DOI: 10.3390/plants10081616] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/03/2021] [Accepted: 08/03/2021] [Indexed: 01/03/2023]
Abstract
The legumes (Fabaceae family) are the second most important agricultural crop, both in terms of harvested area and total production. They are an important source of vegetable proteins and oils for human consumption. Non-thermal plasma (NTP) treatment is a new and effective method in surface microbial inactivation and seed stimulation useable in the agricultural and food industries. This review summarizes current information about characteristics of legume seeds and adult plants after NTP treatment in relation to the seed germination and seedling initial growth, surface microbial decontamination, seed wettability and metabolic activity in different plant growth stages. The information about 19 plant species in relation to the NTP treatment is summarized. Some important plant species as soybean (Glycine max), bean (Phaseolus vulgaris), mung bean (Vigna radiata), black gram (V. mungo), pea (Pisum sativum), lentil (Lens culinaris), peanut (Arachis hypogaea), alfalfa (Medicago sativa), and chickpea (Cicer aruetinum) are discussed. Likevise, some less common plant species i.g. blue lupine (Lupinus angustifolius), Egyptian clover (Trifolium alexandrinum), fenugreek (Trigonella foenum-graecum), and mimosa (Mimosa pudica, M. caesalpiniafolia) are mentioned too. Possible promising trends in the use of plasma as a seed pre-packaging technique, a reduction in phytotoxic diseases transmitted by seeds and the effect on reducing dormancy of hard seeds are also pointed out.
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Luang-In V, Saengha W, Karirat T, Buranrat B, Matra K, Deeseenthum S, Katisart T. Effect of cold plasma and elicitors on bioactive contents, antioxidant activity and cytotoxicity of Thai rat-tailed radish microgreens. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:1685-1698. [PMID: 33275790 DOI: 10.1002/jsfa.10985] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/19/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Raphanus sativus var. caudatus or Thai rat-tailed radish (RTR) contains glucosinolates and isothiocyanates with chemopreventive effects; however, only mature plants have been investigated to date. Thus, the present study aimed to determine isothiocyanates, phenolic compounds and flavonoid compounds, antioxidant activity, cytotoxicity, and antiproliferative activity of RTR microgreens grown from seeds treated with cold plasma (21 kV for 5 min), organic elicitor (160 mmol L-1 NaCl, 10 mmol L-1 CaCl2 or 176 mmol L-1 sucrose) or both in combination. Seeds were germinated on vermiculite and sprayed with deionized water or elicitor for 7 days before harvest. RESULTS Cold plasma had insignificant effect on growth, whereas NaCl and CaCl2 increased fresh weight. Plasma with CaCl2 led to the highest total isothiocyanate (ITC) content [1.99 g kg-1 dry weight (DW)] in RTR microgreens containing raphasatin as the only ITC detected. Plasma treatment gave the highest total phenolic content (7.56 mg gallic acid equivalents g-1 DW), antioxidant activity from a 2,2-diphenyl-1-picrylhydrazyl assay (7.70 mg trolox equivalents g-1 DW) and ferric reducing antioxidant power assay (21.72 mg Fe2+ g-1 DW). Microgreen extracts from plasma showed an IC50 value of 29.28 and 13.83 μg mL-1 towards MCF-7 and HepG2, respectively, with inhibitory properties on matrix metalloproteinase (MMP)-2 and MMP-9 proteins. Plasma enhanced Bax and Caspase-3 gene expression but reduced Bcl-2 and MMP-9 expression, indicating activation of apoptosis. CONCLUSION Cold plasma shows promise as an innovative tool to enhance bioactive compounds with chemopreventive benefits in microgreens. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Vijitra Luang-In
- Natural Antioxidant Innovation Research Unit, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham, Thailand
| | - Worachot Saengha
- Natural Antioxidant Innovation Research Unit, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham, Thailand
| | - Thipphiya Karirat
- Natural Antioxidant Innovation Research Unit, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham, Thailand
| | | | - Khanit Matra
- Department of Electrical Engineering, Faculty of Engineering, Srinakharinwirot University, Nakhon Nayok, Thailand
| | - Sirirat Deeseenthum
- Natural Antioxidant Innovation Research Unit, Department of Biotechnology, Faculty of Technology, Mahasarakham University, Maha Sarakham, Thailand
| | - Teeraporn Katisart
- Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham, Thailand
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12
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Pinto G, Aurilia M, Illiano A, Fontanarosa C, Sannia G, Trifuoggi M, Lettera V, Sperandeo R, Pucci P, Amoresano A. From untargeted metabolomics to the multiple reaction monitoring-based quantification of polyphenols in chocolates from different geographical areas. JOURNAL OF MASS SPECTROMETRY : JMS 2021; 56:e4651. [PMID: 32893948 DOI: 10.1002/jms.4651] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/19/2020] [Accepted: 08/23/2020] [Indexed: 05/03/2023]
Abstract
Plants, including cocoa bean, are the main source of metabolites with multiple biological functions. Polyphenol extracts are widely used as a nutraceutical supplement for their well-known health-promoting role. In this paper, a preliminary untargeted metabolic screening was carried out by matrix-assisted laser desorption/ionization (MALDI)-time of flight (TOF)/TOF on a pool of chocolate samples made by cocoa beans of different geographical areas. Then, a targeted approach was developed for polyphenol quantification by an optimized Liquid chromatography (LC)-tandem mass spectrometry (MS/MS) method multiple reaction monitoring (MRM) ion mode. Detection limit of polyphenol standard ranged between 1 and 25 pg/μl with variation coefficient lower than 15%. External calibration curves were used for quantification of polyphenols in 18 samples. Fifty polyphenols were detected in a single LC-MRM/MS run and quantified by monitoring almost 90 transitions in a 5-minute run. The polyphenols content of different cocoa beans from several countries was finally compared by principal component analysis (PCA) statistical analysis suggesting that the chocolate made by Ecuador cocoa beans showed the highest level of polyphenols.
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Affiliation(s)
- Gabriella Pinto
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
| | - Michela Aurilia
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
| | - Anna Illiano
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
- CEINGE Advanced Biotechnology, Università di Napoli 'Federico II', Via Gaetano Salvatore, 486, 80145, Naples, Italy
| | - Carolina Fontanarosa
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
| | - Giovanni Sannia
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
| | - Marco Trifuoggi
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
| | - Vincenzo Lettera
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
| | - Raffaele Sperandeo
- Dipartimento di Scienze, Università degli Studi della Basilicata, Via Nazario Sauro, 85, Potenza, 85100, Italy
| | - Piero Pucci
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
- CEINGE Advanced Biotechnology, Università di Napoli 'Federico II', Via Gaetano Salvatore, 486, 80145, Naples, Italy
| | - Angela Amoresano
- Dipartimento di Scienze Chimiche, Università di Napoli 'Federico II', Via Cinthia, 26, Naples, 80126, Italy
- Istituto Nazionale Biostrutture e Biosistemi, Consorzio Interuniversitario Viale delle, Medaglie d'Oro, 305, Roma, 00136, Italy
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Changes in Growth and Production of Non-Psychotropic Cannabinoids Induced by Pre-Sowing Treatment of Hemp Seeds with Cold Plasma, Vacuum and Electromagnetic Field. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10238519] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In this study, the effects of seed treatments with different stressors, such as cold plasma (CP), a vacuum and an electromagnetic field (EMF), on the in vitro germination of industrial hemp cv. Futura 75 were compared with the effects on germination in the field, plant growth, and the amount of major cannabinoids in the leaves and inflorescences of female plants. CP and EMF (but not vacuum) treatments improved in vitro seed germination, but had no impact on germination in the field. EMF treatment increased the weight of the above-ground part of male and female plants grown for 4 months by 65–70% and the number of female inflorescences by 70%. CP stimulated the growth of male plants (weight increased 1.4 times) but reduced the growth of female plants. Vacuum treatment did not induce changes in the growth of female and male plants. Vacuum and EMF treatments did not change the amount of cannabidiolic acid (CBDA), but CP decreased the CBDA content in hemp leaves by 41%. Vacuum treatment increased the amount of CBDA in female plant inflorescences by 26%. Thus, hemp seed treatment with EMF has a potential application for increasing the biomass of female plants. CP treatment can be used to increase male plant production while vacuum treatment can stimulate CBD production.
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A Coaxial Dielectric Barrier Discharge Reactor for Treatment of Winter Wheat Seeds. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10207133] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Non-thermal atmospheric pressure plasmas have been recently explored for their potential usage in agricultural applications as an interesting alternative solution for a potential increase in food production with a minor impact on the ecosystem. However, the adjustment and optimization of plasma sources for agricultural applications in general is an important study that is commonly overlooked. Thus, in the present work, a dielectric barrier discharge (DBD) reactor with coaxial geometry designed for the direct treatment of seeds is presented and investigated. To ensure reproducible and homogeneous treatment results, the reactor mechanically shakes the seeds during treatment, and ambient air is admixed while the discharge runs. The DBD, operating with argon and helium, produces two different chemically active states of the system for seed modification. The temperature evolution was monitored to guarantee a safe manipulation of seeds, whereas a physiological temperature was assured by controlling the exposure time. Both treatments led to a remarkable increase in wettability and acceleration in germination. The present study showed faster germination acceleration (60% faster after 24 h) and a lower water contact angle (WCA) (82% reduction) for winter wheat seeds by using the described argon discharge (with air impurities). Furthermore, the treatment can be easily optimized by adjusting the electrical parameters.
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15
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Potential of Cold Plasma Technology in Ensuring the Safety of Foods and Agricultural Produce: A Review. Foods 2020; 9:foods9101435. [PMID: 33050551 PMCID: PMC7599535 DOI: 10.3390/foods9101435] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/27/2020] [Accepted: 10/06/2020] [Indexed: 12/31/2022] Open
Abstract
Cold plasma (CP) is generated when an electrical energy source is applied to a gas, resulting in the production of several reactive species such as ultraviolet photons, charged particles, radicals and other reactive nitrogen, oxygen, and hydrogen species. CP is a novel, non-thermal technology that has shown great potential for food decontamination and has also generated a lot of interest recently for a wide variety of food processing applications. This review discusses the potential use of CP in mainstream food applications to ensure food safety. The review focuses on the design elements of cold plasma technology, mode of action of CP, and types of CP technologies applicable to food applications. The applications of CP by the food industry have been demonstrated for food decontamination, pesticide residue removal, enzyme inactivation, toxin removal, and food packaging modifications. Particularly for food processing, CP is effective against major foodborne pathogenic micro-organisms such as Listeria monocytogenes and Salmonella Typhimurium, Tulane virus in romaine lettuce, Escherichia coli O157:H7, Campylobacter jejuni, and Salmonella spp. in meat and meat products, and fruits and vegetables. However, some limitations such as lipid oxidation in fish, degradation of the oligosaccharides in the juice have been reported with the use of CP, and for these reasons, further research is needed to mitigate these negative effects. Furthermore, more research is needed to maximize its potential.
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16
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The Effects of Plasma on Plant Growth, Development, and Sustainability. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10176045] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cold atmospheric or low pressure plasma has activation effects on seed germination, plant growth and development, and plant sustainability, and prior experimental studies showing these effects are summarized in this review. The accumulated data indicate that the reactive species generated by cold plasma at atmospheric or low pressure may be involved in changing and activating the physical and chemical properties, physiology, and biochemical and molecular processes in plants, which enhances germination, growth, and sustainability. Although laboratory and field experiments are still required, plasma may represent a tool for efficient adaptation to changes in the climate and agricultural environments.
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Choi MS, Jeon EB, Kim JY, Choi EH, Lim JS, Choi J, Park SY. Impact of non-thermal dielectric barrier discharge plasma on Staphylococcus aureus and Bacillus cereus and quality of dried blackmouth angler (Lophiomus setigerus). J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2020.109952] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Song JS, Kim SB, Ryu S, Oh J, Kim DS. Emerging Plasma Technology That Alleviates Crop Stress During the Early Growth Stages of Plants: A Review. FRONTIERS IN PLANT SCIENCE 2020; 11:988. [PMID: 32760412 PMCID: PMC7373780 DOI: 10.3389/fpls.2020.00988] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/17/2020] [Indexed: 05/21/2023]
Abstract
Crops during their early growth stages are vulnerable to a wide range of environmental stressors; thus, earlier seed invigoration and seedling establishment are essential in crop production. As an alternative to synthetic chemical treatments, plasma technology could be one of the emerging technologies to enhance seed germination and seedling vigor by managing environmental stressors. Recent studies have shown its beneficial effects in various stress conditions, suggesting that plasma treatment can be used for early crop stress management. This paper reviewed the effects of different types of plasma treatments on plant responses in terms of the seed surface environment (seed scarification and pathogen inactivation) and physiological processes (an enhanced antioxidant system and activated defense response) during the early growth stages of plants. As a result, plasma treatment can enhance seed invigoration and seedling establishment by alleviating the adverse effects of environmental stressors such as drought, salinity, and pathogen infection. More information on plasma applications and their mechanisms against a broad range of stressors is required to establish a better plasma technology for early crop stress management.
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Affiliation(s)
- Jong-Seok Song
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - Seong Bong Kim
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - Seungmin Ryu
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - Jaesung Oh
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - Do-Soon Kim
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
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Tanino T, Matsui M, Uehara K, Ohshima T. Inactivation of Bacillus subtilis spores on the surface of small spheres using low-pressure dielectric barrier discharge. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106890] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Bovi GG, Fröhling A, Pathak N, Valdramidis VP, Schlüter O. Safety Control of Whole Berries by Cold Atmospheric Pressure Plasma Processing: A Review. J Food Prot 2019; 82:1233-1243. [PMID: 31233355 DOI: 10.4315/0362-028x.jfp-18-606] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
HIGHLIGHTS CAPP technology has high application potential for decontamination of berries. Impacts of CAPP in aspects of food safety and security still need to be addressed. Optimized treatment parameters need to be investigated for each berry type.
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Affiliation(s)
- Graziele G Bovi
- 1 Quality and Safety of Food and Feed, Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany (ORCID: https://orcid.org/0000-0001-8610-6583 [G.G.B.])
| | - Antje Fröhling
- 1 Quality and Safety of Food and Feed, Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany (ORCID: https://orcid.org/0000-0001-8610-6583 [G.G.B.])
| | - Namrata Pathak
- 1 Quality and Safety of Food and Feed, Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany (ORCID: https://orcid.org/0000-0001-8610-6583 [G.G.B.])
| | - Vasilis P Valdramidis
- 2 Department of Food Sciences and Nutrition, Faculty of Health Sciences, University of Malta, Msida MSD 2080, Malta.,3 Centre for Molecular Medicine and Biobanking
| | - Oliver Schlüter
- 1 Quality and Safety of Food and Feed, Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany (ORCID: https://orcid.org/0000-0001-8610-6583 [G.G.B.])
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Ebadi M, Abbasi S, Harouni A, Sefidkon F. Effect of cold plasma on essential oil content and composition of lemon verbena. Food Sci Nutr 2019; 7:1166-1171. [PMID: 31024689 PMCID: PMC6475725 DOI: 10.1002/fsn3.876] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/05/2018] [Accepted: 10/11/2018] [Indexed: 12/04/2022] Open
Abstract
Cold plasma is known as a novel nonthermal processing method for decontamination of medicinal and aromatic plants (MAPs); however, there are little research studies about its effects on active ingredients of these plants. The aim of this research was to investigate the influence of low-pressure cold plasma (LPCP) treatments (1, 3, and 5 min) on the essential oil (EO) content and composition of lemon verbena leaves. The EO content was determined using hydro-distillation, and the composition of the extracted EOs was quantified using gas chromatography and gas chromatography-mass spectrometry techniques. The results showed that by increasing the LPCP treatment duration, the EO content was reduced from 1.2 to 0.9 (% v/w). The highest content of monoterpene hydrocarbons (e.g., limonene) and oxygenated sesquiterpenes (e.g., spathulenol and globulol) was also observed in LPCP-treated ones, whereas the oxygenated monoterpenes (e.g., citral) content of control was measurably higher than those treated with LCPC.
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Affiliation(s)
- Mohammad‐Taghi Ebadi
- Faculty of AgricultureDepartment of Horticultural ScienceTarbiat Modares University (TMU)TehranIran
| | - Soleiman Abbasi
- Faculty of AgricultureDepartment of Food Science and TechnologyTarbiat Modares University (TMU)TehranIran
| | - Amir Harouni
- Faculty of AgricultureDepartment of Food Science and TechnologyTarbiat Modares University (TMU)TehranIran
| | - Fatemeh Sefidkon
- Medicinal Plants Research DivisionResearch Institute of Forests and Rangelands (RIFR)TehranIran
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Effect of Plasma Exposure Time on the Polyphenolic Profile and Antioxidant Activity of Fresh-Cut Apples. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8101939] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cold atmospheric plasma (CAP) has shown good potentiality for the decontamination and stabilization of fresh fruit and vegetable products; however, information about its effect on nutritional quality is still scarce. The aim of this research was to evaluate the impact of a form of indirect treatment known as Dielectric Barrier Discharge (DBD) on apple slices—more specifically, the polyphenolic profile and antioxidant activity of fresh-cut Pink Lady apples. Atmospheric plasma was generated using air as feed gas, and directed to apple slices for up to 30 min. The effect of plasma treatment on physico-chemical parameters was mainly observed as a slight acidification of the tissue and reduction of browning after an extended period of exposure. The samples’ phenolic profile was significantly affected after 10 min of treatment, both in quantitative (an approximately 20% increase) and qualitative terms, while with increasing exposure time a progressive decrease of all polyphenol classes was observed. The antioxidant activity, evaluated by different in-vitro methods, followed a similar trend, increasing after 10 min of processing and then decreasing. Results highlighted how plasma exposure promotes a metabolic response of the fresh tissue, and the importance of carefully controlling the exposure time in order to minimize the loss of nutritional properties.
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Klopsch R, Baldermann S, Voss A, Rohn S, Schreiner M, Neugart S. Bread Enriched With Legume Microgreens and Leaves-Ontogenetic and Baking-Driven Changes in the Profile of Secondary Plant Metabolites. Front Chem 2018; 6:322. [PMID: 30167432 PMCID: PMC6106399 DOI: 10.3389/fchem.2018.00322] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 07/10/2018] [Indexed: 11/28/2022] Open
Abstract
Flavonoids, carotenoids, and chlorophylls were characterized in microgreens and leaves of pea (Pisum sativum) and lupin (Lupinus angustifolius) as these metabolites change during ontogeny. All metabolites were higher in the leaves for both species. Acylated quercetin and kaempferol sophorotrioses were predominant in pea. Genistein and malonylated chrysoeriol were predominant in lupin. Further, the impact of breadmaking on these metabolites using pea and lupin material of two ontogenetic stages as an added ingredient in wheat-based bread was assessed. In "pea microgreen bread" no decrease of quercetin was found with regard to the non-processed plant material. However kaempferol glycosides showed slight decreases induced by the breadmaking process in "pea microgreen bread" and "pea leaf bread." In "lupin microgreen bread" no decrease of genistein compared to the non-processed plant material was found. Chrysoeriol glycosides showed slight decreases induced by the breadmaking process in "lupin microgreen bread" and "lupin leaf bread." In all breads, carotenoids and chlorophylls were depleted however pheophytin formation was caused. Thus, pea and lupin microgreens and leaves are suitable, natural ingredients for enhancing health-promoting secondary plant metabolites in bread and may even be used to tailor bread for specific consumer health needs.
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Affiliation(s)
- Rebecca Klopsch
- Leibniz Institute of Vegetable and Ornamental Crops, Grossbeeren, Germany
- NutriAct–Competence Cluster Nutrition Research Berlin-Potsdam, Nuthetal, Germany
| | - Susanne Baldermann
- Leibniz Institute of Vegetable and Ornamental Crops, Grossbeeren, Germany
- Institute of Nutritional Science, Department of Food Chemistry, University of Potsdam, Nuthetal, Germany
| | - Alexander Voss
- NutriAct–Competence Cluster Nutrition Research Berlin-Potsdam, Nuthetal, Germany
- Institute for Food and Environmental Research (ILU) e. V., Nuthetal, Germany
| | - Sascha Rohn
- NutriAct–Competence Cluster Nutrition Research Berlin-Potsdam, Nuthetal, Germany
- Institute for Food and Environmental Research (ILU) e. V., Nuthetal, Germany
- Hamburg School of Food Science, Institute for Food Chemistry, Universität Hamburg, Hamburg, Germany
| | - Monika Schreiner
- Leibniz Institute of Vegetable and Ornamental Crops, Grossbeeren, Germany
- NutriAct–Competence Cluster Nutrition Research Berlin-Potsdam, Nuthetal, Germany
| | - Susanne Neugart
- Leibniz Institute of Vegetable and Ornamental Crops, Grossbeeren, Germany
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Muhammad AI, Liao X, Cullen PJ, Liu D, Xiang Q, Wang J, Chen S, Ye X, Ding T. Effects of Nonthermal Plasma Technology on Functional Food Components. Compr Rev Food Sci Food Saf 2018; 17:1379-1394. [PMID: 33350151 DOI: 10.1111/1541-4337.12379] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 06/08/2018] [Accepted: 06/14/2018] [Indexed: 12/16/2022]
Abstract
Understanding the impact of nonthermal plasma (NTP) technology on key nutritional and functional food components is of paramount importance for the successful adoption of the technology by industry. NTP technology (NTPT) has demonstrated marked antimicrobial efficacies with good retention of important physical, chemical, sensory, and nutritional parameters for an array of food products. This paper presents the influence of NTPT on selected functional food components with a focus on low-molecular-weight bioactive compounds and vitamins. We discuss the mechanisms of bioactive compound alteration by plasma-reactive species and classify their influence on vitamins and their antioxidant capacities. The impact of NTP on specific bioactive compounds depends both on plasma properties and the food matrix. Induced changes are mainly associated with oxidative degradation and cleavage of double bonds in organic compounds. The effects reported to date are mainly time-dependent increases in the concentrations of polyphenols, vitamin C, or increases in antioxidant activity. Also, improvement in the extraction efficiency of polyphenols is observed. The review highlights future research needs regarding the complex mechanisms of interaction with plasma species. NTP is a novel technology that can both negatively and positively affect the functional components in food.
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Affiliation(s)
- Aliyu Idris Muhammad
- Dept. of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Univ., Hangzhou, Zhejiang, 310058, China.,Dept. of Agricultural and Environmental Engineering, Faculty of Engineering, Bayero Univ. Kano, Nigeria
| | - Xinyu Liao
- Dept. of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Univ., Hangzhou, Zhejiang, 310058, China
| | - Patrick J Cullen
- BioPlasma Research Group, Dublin Inst. of Technology, Dublin, Ireland.,Dept. of Chemical and Environmental Engineering, Univ. of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Donghong Liu
- Dept. of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Univ., Hangzhou, Zhejiang, 310058, China
| | - Qisen Xiang
- College of Food and Biological Engineering, Zhengzhou Univ. of Light Industry, Zhengzhou, 450002, P.R. China
| | - Jun Wang
- College of Food Science and Engineering, Qingdao Agricultural Univ., Chengyang, Qingdao, China
| | - Shiguo Chen
- Dept. of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Univ., Hangzhou, Zhejiang, 310058, China
| | - Xingqian Ye
- Dept. of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Univ., Hangzhou, Zhejiang, 310058, China
| | - Tian Ding
- Dept. of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang Univ., Hangzhou, Zhejiang, 310058, China
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Kim JH, Min SC. Moisture vaporization-combined helium dielectric barrier discharge-cold plasma treatment for microbial decontamination of onion flakes. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.08.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Effects of dielectric barrier discharge (DBD) generated plasma on microbial reduction and quality parameters of fresh mackerel ( Scomber scombrus ) fillets. INNOV FOOD SCI EMERG 2017. [DOI: 10.1016/j.ifset.2017.07.006] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Inactivation of Salmonella Enteritidis PT30 on the surface of unpeeled almonds by cold plasma. INNOV FOOD SCI EMERG 2017. [DOI: 10.1016/j.ifset.2017.02.007] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Bußler S, Ehlbeck J, Schlüter OK. Pre-drying treatment of plant related tissues using plasma processed air: Impact on enzyme activity and quality attributes of cut apple and potato. INNOV FOOD SCI EMERG 2017. [DOI: 10.1016/j.ifset.2016.05.007] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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30
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The effects of pulsed ultraviolet light, cold atmospheric pressure plasma, and gamma-irradiation on the immunoreactivity of soy protein isolate. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2016.06.007] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Bußler S, Rumpold BA, Fröhling A, Jander E, Rawel HM, Schlüter OK. Cold atmospheric pressure plasma processing of insect flour from Tenebrio molitor: Impact on microbial load and quality attributes in comparison to dry heat treatment. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2016.07.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Bußler S, Steins V, Ehlbeck J, Schlüter O. Impact of thermal treatment versus cold atmospheric plasma processing on the techno-functional protein properties from Pisum sativum ‘Salamanca’. J FOOD ENG 2015. [DOI: 10.1016/j.jfoodeng.2015.05.036] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fröhling A, Schlüter O. Flow cytometric evaluation of physico-chemical impact on Gram-positive and Gram-negative bacteria. Front Microbiol 2015; 6:939. [PMID: 26441874 PMCID: PMC4585319 DOI: 10.3389/fmicb.2015.00939] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 08/24/2015] [Indexed: 11/13/2022] Open
Abstract
Since heat sensitivity of fruits and vegetables limits the application of thermal inactivation processes, new emerging inactivation technologies have to be established to fulfill the requirements of food safety without affecting the produce quality. The efficiency of inactivation treatments has to be ensured and monitored. Monitoring of inactivation effects is commonly performed using traditional cultivation methods which have the disadvantage of the time span needed to obtain results. The aim of this study was to compare the inactivation effects of peracetic acid (PAA), ozonated water (O3), and cold atmospheric pressure plasma (CAPP) on Gram-positive and Gram-negative bacteria using flow cytometric methods. E. coli cells were completely depolarized after treatment (15 s) with 0.25% PAA at 10°C, and after treatment (10 s) with 3.8 mg l(-1) O3 at 12°C. The membrane potential of CAPP treated cells remained almost constant at an operating power of 20 W over a time period of 3 min, and subsequently decreased within 30 s of further treatment. Complete membrane permeabilization was observed after 10 s O3 treatment, but treatment with PAA and CAPP did not completely permeabilize the cells within 2 and 4 min, respectively. Similar results were obtained for esterase activity. O3 inactivates cellular esterase but esterase activity was detected after 4 min CAPP treatment and 2 min PAA treatment. L. innocua cells and P. carotovorum cells were also permeabilized instantaneously by O3 treatment at concentrations of 3.8 ± 1 mg l(-1). However, higher membrane permeabilization of L. innocua and P. carotovorum than of E. coli was observed at CAPP treatment of 20 W. The degree of bacterial damage due to the inactivation processes is highly dependent on treatment parameters as well as on treated bacteria. Important information regarding the inactivation mechanisms can be obtained by flow cytometric measurements and this enables the definition of critical process parameters.
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Affiliation(s)
- Antje Fröhling
- Quality and Safety of Food and Feed, Leibniz Institute for Agricultural Engineering Potsdam-Bornim e.V.Potsdam, Germany
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