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Effects of Plasma on Physical Properties of Water: Nanocrystalline-to-Amorphous Phase Transition and Improving Produce Washing. PLASMA 2022. [DOI: 10.3390/plasma5040034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Washing fresh produce using Plasma-activated water recently became a promising eco-friendly alternative to using chemical additives such as Chlorine. We discuss the produce-washing experiments that illustrate that addition of plasma to washing water is a multi-faced phenomena. Not only it increases the sterilization ability of water by killing pathogens, but it also has improved washibility: the ability to remove pathogens from the cleaning surface. We propose an explanation of these features based on the recently discoveries that many physical and chemical properties of water change their temperature dependence between about 35 and 60 degrees Celsius. In particular, heat conductance, light absorption, and surface tension all change their temperature dependence. These drastic changes were associated with water gradually changing its mesoscopic structure: while at the higher temperatures water is a uniform media (amorphous state), at the temperatures below transition it consists of many nano-to-micro-scale clusters (crystalline state). This transition is similar to the second order phase transition. In the present paper we propose that treating water with non-thermal plasma (adding plasma-created active compounds) can lower the temperature of the transition and thus cause a significant change in such physical quantities as surface tension, viscosity, freezing rate, and wettability and washability.
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Ding Q, Tikekar RV. The synergistic antimicrobial effect of a simultaneous UV‐A light and propyl paraben (4‐hydroxybenzoic acid propyl ester) treatment and its application in washing spinach leaves. J FOOD PROCESS ENG 2019. [DOI: 10.1111/jfpe.13062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Qiao Ding
- Department of Nutrition and Food ScienceUniversity of Maryland College Park Maryland
| | - Rohan V. Tikekar
- Department of Nutrition and Food ScienceUniversity of Maryland College Park Maryland
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Ding Q, Alborzi S, Bastarrachea LJ, Tikekar RV. Novel sanitization approach based on synergistic action of UV-A light and benzoic acid: Inactivation mechanism and a potential application in washing fresh produce. Food Microbiol 2017; 72:39-54. [PMID: 29407404 DOI: 10.1016/j.fm.2017.11.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/03/2017] [Accepted: 11/06/2017] [Indexed: 12/17/2022]
Abstract
Antimicrobial activity of the simultaneous UV-A light and benzoic acid (BA) treatment against stationary phase Escherichia coli O157:H7 was investigated. While 15 mM BA or UV-A light exposure for 30 min alone caused < 1 logarithmic reduction in the bacterial population, > 5 logarithmic reductions were induced by the simultaneous application of UV-A and 15 mM BA in 30 min, demonstrating a synergistic antimicrobial effect. Due to its ability to increase cell membrane permeability, addition of EDTA (1 mM) was able to decrease the required concentration of BA in the simultaneous treatment from 15 to 8 mM. Microbial inactivation was a result of simultaneous membrane damage, intracellular acidification, and intracellular oxidative stress. The simultaneous treatment was effective in the presence of organic load of up to 500 mg/L of chemical oxygen demand (COD) and was able to lower cross-contamination risk during simulated washing of spinach (Spinacia oleracea) without adversely affecting its color.
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Affiliation(s)
- Qiao Ding
- Department of Nutrition and Food Science, University of Maryland, 112 Skinner Building, College Park, MD 20742, United States
| | - Solmaz Alborzi
- Department of Nutrition and Food Science, University of Maryland, 112 Skinner Building, College Park, MD 20742, United States
| | - Luis J Bastarrachea
- Department of Nutrition, Dietetics and Food Sciences, Utah State University, 8700 Old Main Hill, Logan, UT 84322, United States
| | - Rohan V Tikekar
- Department of Nutrition and Food Science, University of Maryland, 112 Skinner Building, College Park, MD 20742, United States.
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Collado E, Venzke Klug T, Martínez-Sánchez A, Artés-Hernandez F, Aguayo E, Artés F, Fernández JA, Gómez PA. Immature pea seeds: effect of storage under modified atmosphere packaging and sanitation with acidified sodium chlorite. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:4370-4378. [PMID: 28671335 DOI: 10.1002/jsfa.8513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 06/16/2017] [Accepted: 06/25/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Appropriate sanitation is a priority for extending the shelf life and promoting the consumption of immature pea seeds, as processing accelerates quality deterioration and microbial growth. RESULTS The combined effect of disinfection with acidified sodium chlorite (ASC) or sodium hypochlorite (SH) and packaging under a passive modified atmosphere (MAP) at 1 or 4 °C on quality was analysed. After 14 days, greenness and vitamin C had decreased, especially in the SH-disinfected samples. Total phenols and antioxidant capacity were not affected by disinfection. Proteins levels fell by around 27%, regardless of the sanitizer and storage temperature. Compared with the initial microbial load, samples stored at 1 °C showed an increase of 1 log CFU g-1 in psychrophiles when treated with SH, whereas no increase of note occurred with ASC. In general, microbial counts were always below 3 log CFU g-1 for all the treatments. CONCLUSION Immature pea seeds could be stored for 14 days at 1-4 °C under MAP with only minor quality changes. Disinfection with ASC resulted in better sensory quality, higher content of vitamin C and lower psychrophile counts. More research is needed to analyse the effect of these treatments on other quality parameters. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Elena Collado
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
| | - Tâmmila Venzke Klug
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
- Department of Food Engineering, Postharvest and Refrigeration Group, UPCT, Cartagena, Murcia, Spain
| | - Ascensión Martínez-Sánchez
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
- Department of Food Engineering, Postharvest and Refrigeration Group, UPCT, Cartagena, Murcia, Spain
| | - Francisco Artés-Hernandez
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
- Department of Food Engineering, Postharvest and Refrigeration Group, UPCT, Cartagena, Murcia, Spain
| | - Encarna Aguayo
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
- Department of Food Engineering, Postharvest and Refrigeration Group, UPCT, Cartagena, Murcia, Spain
| | - Francisco Artés
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
- Department of Food Engineering, Postharvest and Refrigeration Group, UPCT, Cartagena, Murcia, Spain
| | - Juan A Fernández
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
- Department of Horticulture, UPCT, Cartagena, Murcia, Spain
| | - Perla A Gómez
- Institute of Plant Biotechnology (IBV), Universidad Politécnica de Cartagena (UPCT), Cartagena, Murcia, Spain
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Yoon JH, Lee SY. Review: Comparison of the effectiveness of decontaminating strategies for fresh fruits and vegetables and related limitations. Crit Rev Food Sci Nutr 2017; 58:3189-3208. [DOI: 10.1080/10408398.2017.1354813] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Jae-Hyun Yoon
- Department of Food and Nutrition, Chung-Ang University, 4726, Seodong-daero, Anseong-si, Gyeonggi-do, South Korea
| | - Sun-Young Lee
- Department of Food and Nutrition, Chung-Ang University, 4726, Seodong-daero, Anseong-si, Gyeonggi-do, South Korea
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Saini RK, Ko EY, Keum YS. Minimally processed ready-to-eat baby-leaf vegetables: Production, processing, storage, microbial safety, and nutritional potential. FOOD REVIEWS INTERNATIONAL 2016. [DOI: 10.1080/87559129.2016.1204614] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ramesh Kumar Saini
- Department of Bioresources and Food Science, College of Life and Environmental Sciences, Konkuk University, Seoul, Korea
| | - Eun Young Ko
- Department of Bioresources and Food Science, College of Life and Environmental Sciences, Konkuk University, Seoul, Korea
| | - Young-Soo Keum
- Department of Bioresources and Food Science, College of Life and Environmental Sciences, Konkuk University, Seoul, Korea
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Basílio N, Garnier T, Avó J, Danel M, Chassaing S, Pina F. Synthesis and multistate characterization of bis-flavylium dications – symmetric resorcinol- and phloroglucinol-type derivatives as stochastic systems. RSC Adv 2016. [DOI: 10.1039/c6ra12017b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two as one! Full kinetic and thermodynamic characterization of two easy-to-prepare bis-flavylium multistate systems showed stochastic behavior, thus revealing lack of interactions between flavylium moieties.
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Affiliation(s)
- N. Basílio
- LAQV
- REQUIMTE
- Departmento de Quimica
- Faculdade de Ciências e Tecnologica
- Universidade NOVA de Lisboa
| | - T. Garnier
- ITAV
- Université de Toulouse
- CNRS
- UPS
- 31106 Toulouse Cedex 1
| | - J. Avó
- LAQV
- REQUIMTE
- Departmento de Quimica
- Faculdade de Ciências e Tecnologica
- Universidade NOVA de Lisboa
| | - M. Danel
- ITAV
- Université de Toulouse
- CNRS
- UPS
- 31106 Toulouse Cedex 1
| | - S. Chassaing
- ITAV
- Université de Toulouse
- CNRS
- UPS
- 31106 Toulouse Cedex 1
| | - F. Pina
- LAQV
- REQUIMTE
- Departmento de Quimica
- Faculdade de Ciências e Tecnologica
- Universidade NOVA de Lisboa
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Meta-analysis of the effects of sanitizing treatments on Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes inactivation in fresh produce. Appl Environ Microbiol 2015; 81:8008-21. [PMID: 26362982 DOI: 10.1128/aem.02216-15] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 09/03/2015] [Indexed: 11/20/2022] Open
Abstract
The aim of this study was to perform a meta-analysis of the effects of sanitizing treatments of fresh produce on Salmonella spp., Escherichia coli O157:H7, and Listeria monocytogenes. From 55 primary studies found to report on such effects, 40 were selected based on specific criteria, leading to more than 1,000 data on mean log reductions of these three bacterial pathogens impairing the safety of fresh produce. Data were partitioned to build three meta-analytical models that could allow the assessment of differences in mean log reductions among pathogens, fresh produce, and sanitizers. Moderating variables assessed in the meta-analytical models included type of fresh produce, type of sanitizer, concentration, and treatment time and temperature. Further, a proposal was done to classify the sanitizers according to bactericidal efficacy by means of a meta-analytical dendrogram. The results indicated that both time and temperature significantly affected the mean log reductions of the sanitizing treatment (P < 0.0001). In general, sanitizer treatments led to lower mean log reductions when applied to leafy greens (for example, 0.68 log reductions [0.00 to 1.37] achieved in lettuce) compared to other, nonleafy vegetables (for example, 3.04 mean log reductions [2.32 to 3.76] obtained for carrots). Among the pathogens, E. coli O157:H7 was more resistant to ozone (1.6 mean log reductions), while L. monocytogenes and Salmonella presented high resistance to organic acids, such as citric acid, acetic acid, and lactic acid (∼3.0 mean log reductions). With regard to the sanitizers, it has been found that slightly acidic electrolyzed water, acidified sodium chlorite, and the gaseous chlorine dioxide clustered together, indicating that they possessed the strongest bactericidal effect. The results reported seem to be an important achievement for advancing the global understanding of the effectiveness of sanitizers for microbial safety of fresh produce.
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Haute SV, Sampers I, Jacxsens L, Uyttendaele M. Selection Criteria for Water Disinfection Techniques in Agricultural Practices. Crit Rev Food Sci Nutr 2013; 55:1529-51. [DOI: 10.1080/10408398.2012.705360] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Aires A, Carvalho R, Rosa EAS, Saavedra MJ. Phytochemical characterization and antioxidant properties of baby-leaf watercress produced under organic production system. CYTA - JOURNAL OF FOOD 2013. [DOI: 10.1080/19476337.2013.769025] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Aires A, Marques E, Carvalho R, Rosa EAS, Saavedra MJ. Evaluation of biological value and appraisal of polyphenols and glucosinolates from organic baby-leaf salads as antioxidants and antimicrobials against important human pathogenic bacteria. Molecules 2013; 18:4651-68. [PMID: 23603948 PMCID: PMC6269804 DOI: 10.3390/molecules18044651] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 04/12/2013] [Accepted: 04/17/2013] [Indexed: 11/16/2022] Open
Abstract
The present investigation has been carried out to investigate the biological role of four different types of baby-leaf salads and to study their potential as natural sources of antioxidants and antimicrobials against several isolates from important human pathogenic bacteria. Four single types of salads (green lettuce, red lettuce, rucola and watercress) and two mixtures [(1) red lettuce+green lettuce; (2) green lettuce + red lettuce + watercress + rucola] were assayed. The HPLC analysis revealed interesting levels of polyphenols and glucosinolates. The results showed a significant variation (p < 0.05) of polyphenols and glucosinolates with plant material. Nine different types of polyphenols grouped in three major classes were found: gallic acid, chlorogenic acid, caffeic acid and dicaffeoyltartaric acid (phenolic acids); quercitin-3-O-rutinoside, quercitin-3-O-rhamnoside, luteolin-7-O-glucoside and isorhamnetin (flavonoids); and cyanidin-3-glucoside (anthocyanins). Only three different glucosinolates were found: glucoraphanin; gluconasturtiin and 4-methoxy-glucobrassicin. A positive correlation was detected between polyphenol contents and antioxidant activity. Red lettuce and mixture 1 were the baby-leaf salads with the highest antioxidant potential. As for the antimicrobial activity, the results showed a selective effect of chemicals against Gram-positive and Gram-negative bacteria and Enterococcus faecalis and Staphylococcus aureus were the bacteria most affected by the phytochemicals. Based on the results achieved baby-leaf salads represent an important source of natural antioxidants and antimicrobial substances.
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Affiliation(s)
- Alfredo Aires
- CITAB—Centre for the Research and Technology for Agro-Environment and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5000-801 Vila Real, Portugal; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +351-259-350-435; Fax: +351-259-350-327
| | - Esperança Marques
- Agronomy Department, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5000-801 Vila Real, Portugal;E-Mail: (E.M.); (R.C.)
| | - Rosa Carvalho
- Agronomy Department, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5000-801 Vila Real, Portugal;E-Mail: (E.M.); (R.C.)
| | - Eduardo A. S. Rosa
- CITAB—Centre for the Research and Technology for Agro-Environment and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5000-801 Vila Real, Portugal; E-Mail:
| | - Maria J. Saavedra
- CECAV—Veterinary and Animal Science Research Center, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5000-801 Vila Real, Portugal; E-Mail:
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