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Maimaitiyiming R, Yang Y, Mulati A, Aihaiti A, Wang J. The Use of Ultraviolet Irradiation to Improve the Efficacy of Acids That Are Generally Recognized as Safe for Disinfecting Fresh Produce in the Ready-to-Eat Stage. Foods 2024; 13:1723. [PMID: 38890951 PMCID: PMC11171915 DOI: 10.3390/foods13111723] [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: 05/02/2024] [Revised: 05/25/2024] [Accepted: 05/28/2024] [Indexed: 06/20/2024] Open
Abstract
Fresh-cut produce is usually produced under standardized disinfection processes, which are unavailable at the ready-to-eat stage. Currently, chemical sanitizers are used for washing, but their disinfection efficacy is limited. In this study, UV-C (1.03 kJ/m2) was combined with organic acids that are generally recognized as safe (GRAS), including citric, malic, acetic, and lactic acids (LAs), to wash lettuce and cherry tomatoes that are contaminated with Escherichia coli O157:H7 and Salmonella Typhimurium. The results showed that LA was the most effective treatment among the single treatments, with a pathogen reduction and cross-contamination incidence of 2.0-2.3 log CFU/g and 28-35%, respectively. After combining with UV-C, the disinfection efficacy and cross-contamination prevention capacity of the four GRAS acids significantly improved. Among the combination treatments, the highest pathogen reduction (2.5-2.7 log CFU/g) and the lowest cross-contamination incidence (11-15%) were achieved by LA-UV. The analyses of ascorbic acid, chlorophyll, lycopene, antioxidant capacity, and ΔE indicated that neither the single nor combination treatments negatively affected the quality properties. These results provide a potential hurdle technology for fresh produce safety improvement at the ready-to-eat stage.
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Affiliation(s)
| | | | | | | | - Jiayi Wang
- National Demonstration Center for Experimental Biology Education, Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
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2
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Aihaiti A, Maimaitiyiming R, Wang L, Wang J. Processing of Fresh-Cut Potato Using Plasma-Activated Water Prepared by Decreasing Discharge Frequency. Foods 2023; 12:2285. [PMID: 37372496 DOI: 10.3390/foods12122285] [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: 03/26/2023] [Revised: 06/02/2023] [Accepted: 06/02/2023] [Indexed: 06/29/2023] Open
Abstract
As a novel non-thermal processing method, the concentration of active compounds in plasma-activated water (PAW) is usually adjusted by changing the voltage and preparation time. We recently adjusted the discharge frequency and found that the PAW properties were improved. In this study, fresh-cut potato was selected as a model, and PAW was prepared using a frequency of 200 Hz (200 Hz-PAW). Its efficacy was compared with that of PAW prepared using 10 kHz. The results showed that the ozone, hydrogen peroxide, nitrate, and nitrite concentrations in 200 Hz-PAW were 5.00-, 3.62-, 8.05-, and 1.48-fold higher than those of 10 kHz-PAW. PAW inactivated the browning-related enzymes polyphenol oxidase and peroxidase, lowering the browning index and inhibiting browning; 200 Hz-PAW exhibited the lowest of these parameters during storage. In addition, PAW induced PAL to promote phenolic synthesis and increase antioxidant activity to delay malondialdehyde accumulation; 200 Hz-PAW exhibited the highest of these parameters. Moreover, 200 Hz-PAW had the lowest weight loss and electrolyte leakage rates. Furthermore, microbial analysis showed that the lowest aerobic mesophilic, mold, and yeast counts during storage were observed in the 200 Hz-PAW group. These results suggest that frequency-controlled PAW has the potential to treat fresh-cut produce.
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Affiliation(s)
- Aihemaitijiang Aihaiti
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Ruxianguli Maimaitiyiming
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Liang Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Jiayi Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
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3
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Gao Q, Yang Z, Bi B, He J. Effects of Slightly Acidic Electrolyzed Water on the Quality of Fresh-Cut Apple. Foods 2022; 12:foods12010039. [PMID: 36613255 PMCID: PMC9818568 DOI: 10.3390/foods12010039] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/09/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
To investigate the effects of a slightly acidic electrolyzed water (SAEW) treatment on the quality of fresh-cut apples during storage, this research used a Box-Behnken design to determine the optimal SAEW treatment conditions. Then, the fresh-cut apple was treated under the optimal condition and subjected to a 13-d storage experiment at 4 °C. For fresh-cut apple treated under the optimal SAEW treatment conditions, the total number of surface colonies was reduced by 2.82 logarithms compared to the control group and the sensory score was 8.73. For the treated fresh-cut apple during storage, the quality of the treated group was significantly greater than the non-treatment group. Thus, the SAEW treatment not only effectively controlled the number of microbes on fresh-cut apple, but also slowed quality deterioration during storage.
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Affiliation(s)
- Qing Gao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Ziyi Yang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Baoliang Bi
- International College, Yunnan Agricultural University, Kunming 650201, China
| | - Jinsong He
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
- Correspondence:
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4
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Non-thermal techniques and the “hurdle” approach: How is food technology evolving? Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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5
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Wang S, Li C, Wang J, Wu Z, Bai B, Tian J, Wu Z. Degradation of malathion and carbosulfan by ozone water and analysis of their by-products. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:7072-7078. [PMID: 35690892 DOI: 10.1002/jsfa.12068] [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: 11/12/2021] [Revised: 03/14/2022] [Accepted: 06/11/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Treatment by ozone water is an emerging technology for the degradation of pesticide residues in vegetables. The ozone dissolved in water generates hydroxyl radicals (· OH), which are highly effective in decomposing organic substances, such as malathion and carbosulfan. RESULTS We found that washing pak choi with 2.0 mg L-1 ozone water for 30 min resulted in 58.3% and 38.2% degradation of the malathion and carbosulfan contents respectively, and the degradation rates of these pure pesticides were 83.0% and 66.3% respectively. In addition, the 'first + first'-order reaction kinetic model was found to predict the trend in the pesticide content during ozone water treatment. Based on investigations by gas chromatography-mass spectrometry combined with the structures of the pesticides, the by-products generated were identified. More specifically, the ozonation-based degradation of carbosulfan generated carbofuran and benzofuranol, whereas malathion produced succinic acid and phosphoric acid. Although some new harmful compounds were formed during degradation of the parent pesticides, these were only present in trace quantities and were transient intermediates that eventually disappeared during the reaction. CONCLUSION Our results, therefore, indicate that ozone water treatment technology for pesticide residue degradation is worthy of popularization and application. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Shan Wang
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Chen Li
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Jiayi Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China
| | - Zhaohui Wu
- lnstitute of Food Processing, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Bing Bai
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Jinlong Tian
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang, China
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6
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Gaseous ozone treatment prolongs the shelf-life of fresh-cut kiwifruit by maintaining its ascorbic acid content. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Li C, Wang S, Wang J, Wu Z, Xu Y, Wu Z. Ozone treatment promotes physicochemical properties and antioxidant capacity of fresh-cut red pitaya based on phenolic metabolism. Front Nutr 2022; 9:1016607. [PMID: 36276831 PMCID: PMC9583149 DOI: 10.3389/fnut.2022.1016607] [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: 08/11/2022] [Accepted: 09/08/2022] [Indexed: 12/03/2022] Open
Abstract
Pitaya is an important fresh-cut product in the global fruit market. The health benefits of fresh-cut red pitaya fruit are attributed to its unique phenolic content and other antioxidants, but the fruit is highly susceptible to spoilage which causes a decline in nutritional quality. In this study, we monitored changes in quality and phenolic compounds of pitaya fruit treated with gaseous ozone during storage at 8 ± 2°C for 4 days. Compared with the control group, ozone treatment was an effective strategy for preserving quality by controlling the growth of microorganisms, preventing weight loss and softening, and improving the content of soluble solids and titratable acids. The results showed that ozone induced the accumulation of phenolic compounds while maintaining the quality. The content of phenolic compounds in fresh-cut pitaya was positively correlated with antioxidant activity. Ultra-performance liquid chromatography-electrospray tandem mass spectrometry was used to fingerprint the phenolic metabolites and metabolomic analysis identified 26 phenolic compounds. The majority of these were phenylpropanoids, and the key metabolic pathways were phenylpropane metabolism and flavonoid synthesis. This study illustrated the mechanism by which of ozone prolongs the shelf life of fresh-cut pitaya fruit and validated ozone as a valuable phenolic inducer and regulator of antioxidant activity, positively influencing the potential health benefits of fresh-cut products.
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Affiliation(s)
- Chen Li
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Shan Wang
- College of Light Industry, Liaoning University, Shenyang, China
| | - Jiayi Wang
- College of Life Science & Technology, Xinjiang University, Xinjiang, China
| | - Zhaohui Wu
- Institute of Food and Processing, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Yaping Xu
- Chaoyang Engineering Technical School, Chaoyang, China
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang, China,*Correspondence: Zhaoxia Wu,
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8
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Alexandre ACS, Ferreira Gomes BA, Duarte GN, Piva SF, Zauza SB, Vilas Boas EVDB. Recent advances in processing and preservation of minimally processed fruits and vegetables: A review – Part 1: Fundamentals and chemical methods. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Giulia Nayara Duarte
- Agriculture Department Federal University of Lavras 37200‐900 Lavras Minas Gerais Brazil
| | - Samella Fabiane Piva
- Food Science Department Federal University of Lavras 37200‐900 Lavras Minas Gerais Brazil
| | - Stefânia Barros Zauza
- Agriculture Department Federal University of Lavras 37200‐900 Lavras Minas Gerais Brazil
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9
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Wang J, Wu Z, Wang H. Combination of ultrasound-peracetic acid washing and ultrasound-assisted aerosolized ascorbic acid: A novel rinsing-free disinfection method that improves the antibacterial and antioxidant activities in cherry tomato. ULTRASONICS SONOCHEMISTRY 2022; 86:106001. [PMID: 35405541 PMCID: PMC9011114 DOI: 10.1016/j.ultsonch.2022.106001] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/19/2022] [Accepted: 04/03/2022] [Indexed: 05/15/2023]
Abstract
Traditional ultrasound (US)-assisted disinfection is only effective during washing. Coating is an effective method to control microbial growth after washing; however, cross-contamination can occur during immersion in the coating aqueous solution. Tap water (TW) rinsing is generally used to remove sanitizer residues after US-assisted washing; however, the Food and Drug Administration stated that rinsing is unnecessary when the peracetic acid (PAA) concentration does not exceed 80 ppm. In this study, we proposed a novel US-assisted hurdle technology of 80 ppm PAA combined with low-frequency US (25 kHz) during washing, followed by US-assisted aerosolization processing (nonimmersion coating). Ascorbic acid (AA), a safe and low-cost agent, was selected as the aerosolization solution. Cherry tomatoes were selected as the model, and the proposed method was compared with traditional US-assisted disinfection methods (US-10 ppm free chlorine washing + TW rinsing and US-5 ppm chlorine dioxide washing + TW rinsing) to analyze the disinfection efficacy and quality changes. During storage, US-PAA + 1%AA facilitated additional 0.7-0.9, 0.6-0.8, 0.7-1.0, and 0.5-1.0 log CFU/g reductions in the counts of Escherichia coli O157:H7, Salmonella Typhimurium, aerobic mesophilic counts, and molds and yeasts, respectively, as compared with traditional US-assisted methods. Sensory properties, color index, total soluble solids, titratable acidity, and weight loss were not negatively affected by any of the treatments. Firmness was slightly reduced after all treatments; however, the firmness of the samples was maintained during storage, in contrast with the decreased firmness observed in the control. Phenolic content and antioxidant activity significantly increased after all treatments. Further analysis of two key enzymes (phenylalanine ammonia-lyase and 4-coumarate-CoA ligase) involved in phenolic synthesis showed that their levels significantly increased following all treatments, leading to an increase in phenolic content and antioxidant activity. This result also indicated that US-assisted washing could act as an abiotic elicitor to increase nutritional content. Overall, US-PAA + 1%AA treatment served as an effective method for disinfecting produce during washing and for controlling microbial growth after washing without prolonging the processing time, which is an advantage over traditional US-assisted washing.
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Affiliation(s)
- Jiayi Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China.
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang 110000, China
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10
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Wang J, Wu Z. Combined use of ultrasound-assisted washing with in-package atmospheric cold plasma processing as a novel non-thermal hurdle technology for ready-to-eat blueberry disinfection. ULTRASONICS SONOCHEMISTRY 2022; 84:105960. [PMID: 35240411 PMCID: PMC8891714 DOI: 10.1016/j.ultsonch.2022.105960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 02/14/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Ultrasound (US) has limited disinfection efficacy, and it has been recommended to combine it with chemical disinfectants during fresh produce washing. After washing and before packaging, the disinfection effect of US-assisted washing can be weakened; thus, in-package disinfection is important. As a nutritious fruit, there are no packaged blueberries can be directly eaten. Therefore, in this study, blueberry was selected as the model, and the two most commonly used disinfectants (free chlorine [FC] at 10 ppm and peracetic acid [PAA] at 80 ppm) were combined with low-frequency US (25 kHz) during washing, followed by in-package disinfection using dielectric barrier discharge cold plasma (CP). The disinfection efficacy of US-FC and US-PAA against Escherichia coli O157:H7 and Salmonella Typhimurium was significantly higher than that of US, PAA, or FC alone. The highest disinfection efficacy of CP was observed at the pulse frequency range of 400-800 Hz. For US-FC (1 min) + CP (1 min), an additional 0.86, 0.71, 0.42, and 0.29 log CFU/g of reduction for E. coli O157:H7, S. Typhimurium, aerobic mesophilic counts, and mold and yeast was achieved, respectively, compared with US-FC (2 min) alone. For US-PAA (1 min) + CP (1 min) an additional 0.71, 0.59, 0.32, and 0.21 log CFU/g of reduction was achieved for the above organisms, respectively, compared with US-PAA (2 min) alone. Quality loss (in total color difference, firmness, and anthocyanin content) was not observed after treatment with US-FC + CP, US-PAA + CP, US-FC, or US-PAA. After treatment with US-FC + CP or US-PAA + CP, the reactive oxygen species (ROS) content was significantly lower than that in the other groups, and antioxidant enzyme activity was significantly higher than that in the other groups, suggesting that in-package CP can activate the blueberry antioxidant system to scavenge ROS, thereby lowering the risk of quality loss. US-CP combination not only improves the disinfection efficacy but also lowers quality loss caused by ROS, without prolonging the processing time.
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Affiliation(s)
- Jiayi Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China.
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang 110000, China
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11
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Chinchkar AV, Singh A, Singh SV, Acharya AM, Kamble MG. Potential sanitizers and disinfectants for fresh fruits and vegetables: A comprehensive review. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16495] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ajay V. Chinchkar
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli, Sonipat Haryana‐131028 India
| | - Anurag Singh
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli, Sonipat Haryana‐131028 India
| | - Sukh Veer Singh
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli, Sonipat Haryana‐131028 India
| | | | - Meenatai G. Kamble
- Department of Food Science and Technology National Institute of Food Technology Entrepreneurship and Management Kundli, Sonipat Haryana‐131028 India
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12
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Sun Y, Wu Z, Zhang Y, Wang J. Use of aqueous ozone rinsing to improve the disinfection efficacy and shorten the processing time of ultrasound-assisted washing of fresh produce. ULTRASONICS SONOCHEMISTRY 2022; 83:105931. [PMID: 35092941 PMCID: PMC8801763 DOI: 10.1016/j.ultsonch.2022.105931] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/13/2022] [Accepted: 01/20/2022] [Indexed: 05/16/2023]
Abstract
In minimal processing industry, chlorine is widely used in the disinfection process and ultrasound (US) increases the disinfection efficacy of chlorine and reduces the cross-contamination incidence during washing. Tap water (TW), which has no disinfection effect, is generally used to rinse off sanitizer residues on the surface of disinfected fresh-cut vegetables. In this study, aqueous ozone (AO), a low-cost and residue-free sanitizer, was used to replace TW rinsing in combination with US (28 kHz)-chlorine (free chlorine [FC] at 10 ppm, a concentration recommended for industrial use) for the disinfection of fresh-cut lettuce as a model. US-chlorine (40 s) + 2.0 ppm AO (60 s) treatment resulted in browning spots on lettuce surface at the end of storage. In contrast, US-chlorine (40 s) + 1.0 ppm AO (60 s) did not lead to deterioration of the sensory quality (sensory crispness, color, and flavor) and a change in total color difference, and the activities of browning-related enzymes were significantly lower. Moreover, US-chlorine (40 s) + 1.0 ppm of AO (60 s) treatment led to significantly lower counts of Escherichia coli O157:H7, Salmonella Typhimurium, aerobic mesophilic (AMC), and molds and yeasts (M&Y) on days 0-7 than US-chlorine (60 s) + TW (60 s) and single 1.0 ppm AO (120 s) treatments, suggesting that AO provided an additional disinfection effect over TW, while reducing the overall processing time by 20 s. Cell membrane permeability analysis (alkaline phosphatase, protein, nucleotide, and adenosine triphosphate leakage) showed that the combination with 1.0 ppm AO caused more severe cell membrane damage in E. coli O157:H7 and S. Typhimurium, explaining the higher disinfection efficacy. 16S rRNA sequencing revealed that following US-chlorine (40 s) + 1.0 ppm of AO (60 s) treatment, Massilia and Acinetobacter had higher relative abundances (RAs) on day 7 than after US-chlorine (60 s) + TW (60 s) treatment, whereas the RAs of Escherichia-Shigella was significantly lower, indicating that the former treatment has a superior capacity in maintaining a stable microbial composition. This explains from an ecological point of view why US-chlorine (40 s) + 1.0 ppm of AO (60 s) led to the lowest AMC and M&Y counts during storage. The study results provide evidence that AO has potential as an alternative to TW rinsing to increase the disinfection efficacy of US-chlorine.
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Affiliation(s)
- Yeting Sun
- Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang 110000, China
| | - Yangyang Zhang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China
| | - Jiayi Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China.
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13
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Premjit Y, Sruthi NU, Pandiselvam R, Kothakota A. Aqueous ozone: Chemistry, physiochemical properties, microbial inactivation, factors influencing antimicrobial effectiveness, and application in food. Compr Rev Food Sci Food Saf 2022; 21:1054-1085. [DOI: 10.1111/1541-4337.12886] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 11/04/2021] [Accepted: 11/25/2021] [Indexed: 12/29/2022]
Affiliation(s)
- Yashaswini Premjit
- Agricultural & Food Engineering Department Indian Institute of Technology Kharagpur West Bengal India
| | - N. U. Sruthi
- Agricultural & Food Engineering Department Indian Institute of Technology Kharagpur West Bengal India
| | - R. Pandiselvam
- Physiology, Biochemistry and Post Harvest Technology Division ICAR‐Central Plantation Crops Research Institute (CPCRI) Kasaragod Kerala India
| | - Anjineyulu Kothakota
- Agro‐Processing & Technology Division CSIR‐National Institute for Interdisciplinary Science and Technology (NIIST) Trivandrum Kerala India
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14
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Raffo A, Paoletti F. Fresh-Cut Vegetables Processing: Environmental Sustainability and Food Safety Issues in a Comprehensive Perspective. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2021.681459] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The fresh-cut industry supplies the food market with healthy fresh fruit and vegetables and, in that way, may contribute to improve the nutritional status of the general population. On the other hand, over the last few years increasing concerns have been raised regarding the environmental impact of the fresh-cut industry, human health risks from exposure to disinfection by-products found in fresh-cut products and chlorine-based disinfection treatments during produce processing. This review provides a comprehensive view of the main interlinked aspects related to food safety and environmental impact of processing of fresh-cut vegetables. Advantages and downsides of the mainstream disinfection strategy, based on the use of chlorine-related disinfecting agents, along with some alternative treatments close to a wide commercial application, are discussed. Limitation in the application of these strategies to processing of organic fresh-cut produce are also highlighted, examining the specific environmental and food safety problems in the organic sector. Areas where lack of available information hinders at present a clear understanding of priorities of research and action are pointed out. Innovative conceptual tools are proposed to address these multiple and interlinking issues and to overcome limitations of currently available technologies. A comprehensive and multidisciplinary approach is suggested to move toward a more safe and environmentally sustainable production of fresh-cut products.
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15
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Wang J, Huang K, Wu Z, Yu Y. Effects of ultrasound-assisted low-concentration chlorine washing on ready-to-eat winter jujube (Zizyphus jujuba Mill. cv. Dongzao): Cross-contamination prevention, decontamination efficacy, and fruit quality. ULTRASONICS SONOCHEMISTRY 2022; 82:105905. [PMID: 34974393 PMCID: PMC8799748 DOI: 10.1016/j.ultsonch.2021.105905] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/18/2021] [Accepted: 12/28/2021] [Indexed: 05/09/2023]
Abstract
Wash water is circulated for use in the minimal processing industry, and inefficient disinfection methods can lead to pathogen cross-contamination. Moreover, few disinfection strategies are available for ready-to-eat fruits that do not need to be cut. In this study, the use of chlorine and ultrasound, two low-cost disinfection methods, were evaluated to disinfect winter jujube, a delicious, nutritious, and widely sold fruit in China. Ultrasound treatment (28 kHz) alone could not decrease the cross-contamination incidence of Escherichia coli O157:H7, non-O157 E. coli, and Salmonella Typhimurium, and free chlorine treatment at 10 ppm decreased the incidence from 55.00% to 5.00% for E. coli O157:H7, 65.00% to 6.67% for non-157 E. coli, and 70.00% to 6.67% for S. Typhimurium. The cross-contamination incidence was completely reduced (pathogens were not detected in sample) when the treatments were combined. The counts of aerobic mesophiles, aerobic psychrophiles, molds, yeasts, and three pathogens in the group subjected to combination treatment (28 kHz ultrasound + 10 ppm free chlorine) were significantly lower than those in the control, chlorine-treated, and ultrasound-treated groups during storage (0-7 d at 4 °C). Analysis of weight loss, sensory quality (crispness, color, and flavor), instrument color (a*/b*), soluble matter contents (total soluble solids, reducing sugar, total soluble sugar, and titratable acid), and nutritional properties (ascorbic acid and polyphenolic contents) indicated that treatment with ultrasound, chlorine, and their combination did not lead to additional quality loss compared with properties of the control. Additionally, the activities of phenylalanine ammonia-lyase and polyphenol oxidase were not significantly increased in the treatment group, consistent with the quality analysis results. These findings provide insights into disinfection of uncut ready-to-eat fruits using a minimum dose of disinfectant for cross-contamination prevention under ultrasonication. The use of ultrasound alone to decontaminate fresh produce is accompanied by a high risk of pathogen contamination, and the use of sanitizers to decrease cross-contamination incidence is recommended.
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Affiliation(s)
- Jiayi Wang
- Key Laboratory of New Eco-liquor-making Technology and Application of Hunan Universities, College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China.
| | - Kun Huang
- Key Laboratory of New Eco-liquor-making Technology and Application of Hunan Universities, College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang 110000, China
| | - Yougui Yu
- Key Laboratory of New Eco-liquor-making Technology and Application of Hunan Universities, College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China
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16
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Yi L, Zeng P, Wong KY, Chan KF, Chen S. Controlling Listeria monocytogenes in ready-to-eat leafy greens by amphipathic α-helix peptide zp80 and its antimicrobial mechanisms. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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17
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Application of cold plasma and ozone technology for decontamination of Escherichia coli in foods- a review. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.108338] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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18
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Wang J, Lei Y, Yu Y, Yin L, Zhang Y. Use of Acetic Acid to Partially Replace Lactic Acid for Decontamination against Escherichia coli O157:H7 in Fresh Produce and Mechanism of Action. Foods 2021; 10:2406. [PMID: 34681456 PMCID: PMC8535275 DOI: 10.3390/foods10102406] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022] Open
Abstract
Escherichia coli O157:H7 is frequently detected in ready-to-eat produce and causes serious food-borne diseases. The decontamination efficacy of lactic acid (LA) is clearly established. In this study, LA was mixed with acetic acid (AA) to reduce costs while achieving consistent or better inhibitory effects. Time-kill curves and inoculation experiments using fresh-cut spinach and arugula indicated that 0.8%LA+0.2%AA shows similar antibacterial effects to those of 1%LA. To determine whether 1%LA and 0.8%LA+0.2%AA exert antibacterial effects by similar mechanisms, proteomics analysis was used. The proteins related to macromolecule localization, cellular localization, and protein unfolding were uniquely altered after the treatment with 1%LA, and the proteins related to taxis, response to stress, catabolic process, and the regulation of molecular function were uniquely altered after the treatment with 0.8%LA+0.2%AA. Based on these findings, combined with the results of a network clustering analysis, we speculate that cell membrane damage is greater in response to LA than to 0.8%LA+0.2%AA. This prediction was supported by cell membrane permeability experiments (analyses of protein, nucleotide, ATP, and alkaline phosphatase leakage), which showed that LA causes greater membrane damage than 0.8%LA+0.2%AA. These results provide a theoretical basis for the application of an acid mixture to replace LA for produce decontamination.
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Affiliation(s)
- Jiayi Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China; (Y.Y.); (L.Y.); (Y.Z.)
| | - Yue Lei
- Institute of Rice Research, Guizhou Academy of Agricultural, Guiyang 550009, China;
| | - Yougui Yu
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China; (Y.Y.); (L.Y.); (Y.Z.)
| | - Lebin Yin
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China; (Y.Y.); (L.Y.); (Y.Z.)
| | - Yangyang Zhang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China; (Y.Y.); (L.Y.); (Y.Z.)
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19
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Wang J, Zhang Y, Yu Y, Wu Z, Wang H. Combination of ozone and ultrasonic-assisted aerosolization sanitizer as a sanitizing process to disinfect fresh-cut lettuce. ULTRASONICS SONOCHEMISTRY 2021; 76:105622. [PMID: 34126525 PMCID: PMC8202344 DOI: 10.1016/j.ultsonch.2021.105622] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/09/2021] [Accepted: 06/04/2021] [Indexed: 05/24/2023]
Abstract
Reduction of sanitizer dosage and development of non-immersion disinfection methods have become major focuses of research. Here, we examined the disinfection efficacy of combining gaseous ozone (4 and 8 ppm) with aerosolized oxidizing sanitizer [sodium hypochlorite (SH, 100 and 200 ppm)] and aerosolized organic acid [acetic acid (AA, 1% and 2%) and lactic acid (LA, 1% and 2%)]. Notably, 1% AA and 4 ppm gaseous ozone were ineffective for disinfecting Salmonella Typhimurium, and treatment with 1% AA + 8 ppm ozone caused browning of lettuce leaves and stimulated increases in aerobic mesophilic count (AMC), aerobic psychrotrophic count (APC), S. Typhimurium, and Escherichia coli O157:H7. Treatment with 2% LA + 8 ppm ozone resulted in the lowest S. Typhimurium, E. coli O157:H7, Listeria monocytogenes, AMC, APC, and molds and yeasts during storage (0-7 days at 4 °C). Quality analysis indicates that LA + 8 ppm ozone and SH + 8 ppm ozone did not negatively affect L*, a*, b*, polyphenolic content, weight loss, and sensory properties; however, the levels of two individual phenolic compounds (3,4-dihydroxybenzoic acid and vanillin), responsible for phenylpropanoid synthesis, were significantly increased after treatment with 2% LA + 8 ppm ozone. These findings provided insights into the use of LA combined with gaseous ozone for application in disinfecting fresh produce.
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Affiliation(s)
- Jiayi Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China.
| | - Yangyang Zhang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China
| | - Yougui Yu
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
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20
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The efficacy of washing strategies in the elimination of fungicide residues and the alterations on the quality of bell peppers. Food Res Int 2021; 147:110579. [PMID: 34399550 DOI: 10.1016/j.foodres.2021.110579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 06/22/2021] [Accepted: 06/27/2021] [Indexed: 11/20/2022]
Abstract
Food safety problems caused by pesticide residues in vegetables have become a top issue to raise public concern. In this study, bell peppers were grown in an experimental field and sprayed with two systemic (azoxystrobin and difenoconazole) and one contact (chlorothalonil) fungicides. Ozone (ozonated water and water continuously bubble with ozone) or conventional domestic (washing with distilled water, detergent, acetic acid, sodium bicarbonate, and sodium hypochlorite solutions) procedures were investigated to identify the most effective way to remove fungicide residues in bell peppers. The residues in the fruits and the washing solutions were determined by solid-liquid extraction with a low-temperature partition (SLE/LTP) and liquid-liquid extraction with a low-temperature partition (LLE/LTP), respectively, and analyzed by gas chromatography. Water continuously bubbled with ozone a concentration of 3 mg L-1 was the most efficient treatment with removal of fungicides residues ranging from 67% to 87%. However, similar treatment at a lower concentration (1 mg L-1) did not only efficiently removed fungicide residues (between 53% and 75%) but also preserving the quality of the fruit along a storage time of 13 days. Among the conventional solutions, sodium bicarbonate at 5% showed good efficiency removing between 60% and 81% of the fungicide residues from bell peppers, affecting the color quality of the fruit. Overall, the most affected physicochemical parameters in bell peppers after the treatments were weight loss, color, and vitamin C content.
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21
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Pounraj S, Bhilwadikar T, Manivannan S, Rastogi NK, Negi PS. Effect of ozone, lactic acid and combination treatments on the control of microbial and pesticide contaminants of fresh vegetables. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:3422-3428. [PMID: 33289115 DOI: 10.1002/jsfa.10972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 10/31/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Fruit and vegetable consumption has increased due to their tremendous health benefits. However, recent studies have shown that contaminated products may serve as vehicles for foodborne pathogens and harmful chemicals. Therefore, fresh vegetables must be decontaminated before consumption to ensure food safety. RESULTS In this study, the combined decontamination treatment of lactic acid (2.5 mL L-1 ) and ozone (9 mg L-1 ) for 10 min showed better efficacy in the removal of contaminants from fresh vegetables as compared to individual treatments. The combined treatment resulted in a reduction of 1.5-3.5 log CFU of native mesophilic bacteria per gram and 1.6-2.9 log CFU of artificially inoculated Escherichia coli per gram from tomato, cucumber, carrot and lettuce. The combined treatment also removed spiked pesticides, which represent artificial chemical contamination (28-97% chlorpyrifos and 62-100% λ-cyhalothrin residues), from fresh vegetables. No significant difference (P > 0.05) in various sensory attributes of vegetables was observed between untreated and treated (lactic acid and ozone) vegetables. CONCLUSIONS The combination treatment provides a novel approach to target two groups of contaminants using a single procedure. The combination treatment can be used as an alternative to currently used decontamination techniques for the supply of safe vegetables to consumers. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Saranya Pounraj
- Department of Fruit and Vegetable Technology, CSIR - Central Food Technological Research Institute, Mysuru, India
| | - Tanmayee Bhilwadikar
- Department of Fruit and Vegetable Technology, CSIR - Central Food Technological Research Institute, Mysuru, India
| | - Selladurai Manivannan
- Department of Food Protectant and Infestation Control, CSIR - Central Food Technological Research Institute, Mysuru, India
| | - Navin K Rastogi
- Department of Food Engineering, CSIR - Central Food Technological Research Institute, Mysuru, India
| | - Pradeep S Negi
- Department of Fruit and Vegetable Technology, CSIR - Central Food Technological Research Institute, Mysuru, India
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22
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A Double-Edged Sword of Surfactant Effect on Hydrophobic Surface Broccoli Leaf as a Model Plant: Promotion of Pathogenic Microbial Contamination and Improvement to Disinfection Efficiency of Ozonated Water. Processes (Basel) 2021. [DOI: 10.3390/pr9040679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Pathogenic microbial contamination is significantly influenced by the crop surface properties and surfactant use, which are crucial factors for the postharvest washing process. However, there is little information on the interaction between surfactant and food pathogens on food crops. Thus, this study (1) investigated whether the attachment of Salmonella increases as pesticides denature epicuticular wax crystals and (2) tested if the antibacterial effect of ozonated water can be improved on waxy produce surfaces by adding surfactant to ozonated water. As a result, significantly lower levels of Salmonella Typhimurium attached to waxy leaf surfaces than they did to glossy and pesticide-treated waxy leaf surfaces (3.28 as opposed to 4.10 and 4.32 Log colony forming units (CFU)/cm2, respectively), suggesting that the pesticide containing a surfactant application increased the attachment of S. Typhiumurium on waxy leaf surfaces. There was no significant washing effect on waxy leaf surfaces washed with ozonated water. On the other hand, S. Typhimurium were not detected on waxy leaf surfaces after washing with surfactant-added ozonated water.
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23
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Botondi R, Barone M, Grasso C. A Review into the Effectiveness of Ozone Technology for Improving the Safety and Preserving the Quality of Fresh-Cut Fruits and Vegetables. Foods 2021; 10:748. [PMID: 33915979 PMCID: PMC8065486 DOI: 10.3390/foods10040748] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/22/2021] [Accepted: 03/25/2021] [Indexed: 11/17/2022] Open
Abstract
In recent years, consumers have become increasingly aware of the nutritional benefits brought by the regular consumption of fresh fruits and vegetables, which reduces the risk of health problems and disease. High-quality raw materials are essential since minimally processed produce is highly perishable and susceptible to quality deterioration. The cutting, peeling, cleaning and packaging processes as well as the biochemical, sensorial and microbial changes that occur on plant tissue surfaces may accelerate produce deterioration. In this regard, biological contamination can be primary, which occurs when the infectious organisms directly contaminate raw materials, and/or by cross-contamination, which occurs during food preparation processes such as washing. Among the many technologies available to extend the shelf life of fresh-cut products, ozone technology has proven to be a highly effective sterilization technique. In this paper, we examine the main studies that have focused on the effects of gaseous ozone and ozonated water treatments on microbial growth and quality retention of fresh-cut fruit and vegetables. The purpose of this scientific literature review is to broaden our knowledge of eco-friendly technologies, such as ozone technology, which extends the shelf life and maintains the quality of fresh produce without emitting hazardous chemicals that negatively affect plant material and the environment.
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Affiliation(s)
- Rinaldo Botondi
- Department for Innovation in Biological, Agro-Food and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (M.B.); (C.G.)
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24
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Liu C, Chen C, Jiang A, Zhang Y, Zhao Q, Hu W. Effects of aqueous ozone treatment on microbial growth, quality, and pesticide residue of fresh-cut cabbage. Food Sci Nutr 2021; 9:52-61. [PMID: 33473270 PMCID: PMC7802563 DOI: 10.1002/fsn3.1870] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 02/03/2023] Open
Abstract
The influence of aqueous ozone (1.4 mg/L) treatment for 1, 5, and 10 min on the microbial growth and quality attributes of fresh-cut cabbage during storage at 4°C for 12 days was evaluated. The pesticide residue removal effect of aqueous ozone treatment for 5 min was also determined. The results show that the growth rates of aerobic bacteria, coliforms, and yeasts were significantly inhibited (p < .05) by aqueous ozone treatment during storage; treatment for 10 min showed the greatest inactivation of bacteria, coliforms, and molds. Aqueous ozone stimulated initial respiratory metabolism compared with that of the control. Aqueous ozone treatments reduced ethylene production and improved the overall quality of fresh-cut cabbage. In addition, the effect of aqueous ozone treatment for 5 min on the removal of trichlorfon, chlorpyrifos, methomyl, dichlorvos, and omethoate from fresh-cut cabbage was greater (p < .05) than that of the control. These results indicate that aqueous ozone treatment for 5 min could be an economic and effective method to remove pesticide residues and enhance the storability of fresh-cut cabbage.
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Affiliation(s)
- Chenghui Liu
- College of Life ScienceDalian Minzu UniversityDalianChina
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University)Ministry of EducationDalianChina
| | - Chen Chen
- College of Life ScienceDalian Minzu UniversityDalianChina
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University)Ministry of EducationDalianChina
| | - Aili Jiang
- College of Life ScienceDalian Minzu UniversityDalianChina
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University)Ministry of EducationDalianChina
| | - Yanhui Zhang
- College of Life ScienceDalian Minzu UniversityDalianChina
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University)Ministry of EducationDalianChina
| | - Qiqi Zhao
- College of Life ScienceDalian Minzu UniversityDalianChina
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University)Ministry of EducationDalianChina
| | - Wenzhong Hu
- College of Life ScienceDalian Minzu UniversityDalianChina
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University)Ministry of EducationDalianChina
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25
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Jeon MJ, Ha JW. Bactericidal and synergistic effects of X-ray irradiation and gallic acid against foodborne pathogens on lettuce. Food Microbiol 2020; 92:103584. [PMID: 32950168 DOI: 10.1016/j.fm.2020.103584] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 12/13/2022]
Abstract
The objectives of this study were to evaluate the bactericidal effects of X-ray irradiation and gallic acid (GA) against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes on lettuce leaves and in phosphate-buffered saline (PBS). Inoculated PBS and lettuce were exposed to X-rays (0.05, 0.1, and 0.15; 0.1, 0.2, and 0.3 kGy, respectively), and GA was applied to lettuce leaves as a solution and in PBS at concentrations of 0.5% (w/v). Combined treatment with 0.3 kGy and 0.5% GA reduced E. coli O157:H7, S. Typhimurium, and L. monocytogenes cell counts 5.41, 2.57, and 1.36 log CFU/cm2 on lettuce, respectively. Combined treatment with 0.15 kGy X-ray and 0.5% GA reduced counts for the same species by 6.54, 4.24, and 1.51 log CFU/mL in PBS. The combined treatments exerted a synergistic antibacterial effect against E. coli O157:H7 on lettuce, but not against S. Typhimurium or L. monocytogenes. In PBS, the synergistic effect was confirmed in both E. coli O157:H7 and S. Typhimurium cells. Mechanistic investigations indicated that the synergistic antibacterial effect was associated with intracellular reactive oxygen species (ROS) generation and bacterial cell membrane damage. Additionally, the X-ray and GA combination treatment did not adversely affect the color, total phenol content, and texture of lettuce. These findings demonstrate that treatment with X-ray radiation and GA can enhance the microbiological safety of fresh produce.
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Affiliation(s)
- Min-Jin Jeon
- Department of Food Science and Biotechnology, Global K-Food Research Center, Hankyong National University, Anseong-si, 17579, South Korea
| | - Jae-Won Ha
- Department of Food Science and Biotechnology, Global K-Food Research Center, Hankyong National University, Anseong-si, 17579, South Korea.
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26
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Ozone treatment pak choi for the removal of malathion and carbosulfan pesticide residues. Food Chem 2020; 337:127755. [PMID: 32777567 DOI: 10.1016/j.foodchem.2020.127755] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 08/01/2020] [Accepted: 08/01/2020] [Indexed: 01/15/2023]
Abstract
Since the beginning of the widespread use of pesticides, their removal from food has become a serious concern. In this study, the removal of residual pesticides (malathion and carbosulfan) from pak choi via treatment with ozonated water was investigated. Under the optimal treatment conditions, i.e., 2.0 mg/L ozonated water and a treatment duration of 15 min, malathion and carbosulfan were degraded by 53.0 and 33.0%, respectively, without any significant changes in color. Even though there was a slight decrease in vitamin C content (~7.9 mg/100 g) following the treatments, a significant decrease in the microbial colonies on the vegetables was observed. Additionally, the pesticide degradation mechanism showed good fitting with a "first + first"-order kinetic model (R2 > 0.9), and the slope (k) indicated that ozone had a more prominent degradation effect on malathion than on carbosulfan. Therefore, this study provides a theoretical basis for controlling agricultural pesticide residues in household applications.
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27
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Karaca H, Velioglu YS. Effects of ozone and chlorine washes and subsequent cold storage on microbiological quality and shelf life of fresh parsley leaves. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Wang J, Yu Y, Dong Y. Disinfection of Ready-to-Eat Lettuce Using Polyhexamethylene Guanidine Hydrochloride. Microorganisms 2020; 8:E272. [PMID: 32079354 PMCID: PMC7074769 DOI: 10.3390/microorganisms8020272] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/16/2020] [Accepted: 02/16/2020] [Indexed: 11/16/2022] Open
Abstract
As a novel and safe sanitizer, polyhexamethylene guanidine hydrochloride (PHMG) has been used to inhibit the spoilage of agricultural products caused by fungi. However, little is known about its antibacterial effects on vegetables. In this study, we evaluated the disinfection efficacy of PHMG on ready-to-eat lettuce. PHMG (150-200 mg/L) treatment for 5 min was optimal for lettuce disinfection. Compared to several household sanitizers (vinegar: 1% acetic acid; kettle descaler: 1% citric acid; "84" disinfectant: 200 mg/L sodium hypochlorite), PHMG showed the greatest reductions in Escherichia coli O157:H7, Listeria monocytogenes, aerobic mesophilic counts, aerobic psychrotrophic counts and molds and yeasts. Quality analysis of color (as determined by L*, a* and b*) and determination of electrolyte leakage indicated that PHMG did not cause any additional quality loss as compared to other household sanitizers. These results provide a reference for the application of PHMG as a vegetable sanitizer at the ready-to-eat stage.
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Affiliation(s)
- Jiayi Wang
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China;
| | - Yougui Yu
- College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China;
| | - Yuemei Dong
- Shijiashike Co., Ltd., Liaoyang 111000, China;
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29
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Wang J, Yu Y, Dong Y. Combination of polyhexamethylene guanidine hydrochloride and potassium peroxymonosulfate to disinfect ready-to-eat lettuce. RSC Adv 2020; 10:40316-40320. [PMID: 35520831 PMCID: PMC9057474 DOI: 10.1039/d0ra08356a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/01/2020] [Indexed: 12/23/2022] Open
Abstract
There is increasing demand for improved fresh produce disinfection technology during the ready-to-eat stage, especially in low-income developing countries. We previously reported that polyhexamethylene guanidine hydrochloride (PHMG) is an effective sanitizer using fresh-cut lettuce as a model. As a low-cost alternative, in the present study, we examined the disinfection efficacy of combining PHMG with the oxidizing sanitizer potassium peroxymonosulfate (PMS). PHMG (150 mg L−1) reduced the counts of Escherichia coli O157:H7, non-O157 E. coli, Listeria monocytogenes, Salmonella typhimurium, and naturally present microbes on ready-to-eat lettuce. The disinfection efficacy of PMS was significantly lower than that of PHMG; however, the efficacy of their combination (100 mg L−1 PHMG + 50 mg L−1 PMS, 50 mg L−1 PHMG + 100 mg L−1 PMS, and 50 mg L−1 PHMG + 50 mg L−1 PMS) was equivalent to that of PHMG alone. Color and sensory analyses (crispness, color, flavour, and off-odor) indicated that the combination of PHMG and PMS will not lead to additional quality loss when compared with tap water treatment, and electrolyte leakage analysis showed no additional lettuce surface damage of the combination when compared with PHMG-only treatment. These results show that partial replacement of PHMG by PMS is a cost-reducing strategy, providing a theoretical foundation for its practical application. Combination of polyhexamethylene guanidine hydrochloride and potassium peroxymonosulfate can achieve consistent disinfection effects as those obtained with polyhexamethylene guanidine hydrochloride but at a lower cost.![]()
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Affiliation(s)
- Jiayi Wang
- College of Food and Chemical Engineering
- Shaoyang University
- Shaoyang 422000
- China
| | - Yougui Yu
- College of Food and Chemical Engineering
- Shaoyang University
- Shaoyang 422000
- China
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30
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Wang J, Sun Y, Tao D, Wang S, Li C, Zheng F, Wu Z. Reduction of Escherichia coli O157:H7, Listeria monocytogenes, and Naturally Present Microbe Counts on Lettuce using an Acid Mixture of Acetic and Lactic Acid. Microorganisms 2019; 7:E373. [PMID: 31547035 PMCID: PMC6843205 DOI: 10.3390/microorganisms7100373] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 09/14/2019] [Accepted: 09/18/2019] [Indexed: 11/16/2022] Open
Abstract
Lactic acid (LA) and acetic acid (AA) are independently used to disinfect fresh leaf vegetables. LA has a higher efficacy but costs more than AA. Herein, we compared the disinfection efficacy of LA, AA, and their mixture on lettuce to determine whether the cheaper acid mixture shows similar or more efficacy than LA. Quality analysis indicated that the acid mixture and individual acids did not cause additional loss of instrument color and polyphenolic content compared with that of the control; however, visible defects were observed at AA concentrations exceeding 0.8%. Analysis of Escherichia coli O157:H7, Listeria monocytogenes, and naturally present microbes (aerobic mesophilic and psychrotrophic bacteria, coliforms, molds, and yeasts) showed that the acid mixture led to the highest reduction in microbial count during storage. 16S rRNA sequencing was further employed to understand the effects of the acid mixture and individual acids on lettuce microbial ecology. During storage, the acid mixture and individual acids significantly decreased the abundance of Massilia spp. and Alkanindiges spp. but there was a marked increase in Escherichia-Shigella abundance (LA: 0.003-58.82%; AA: 0.01-55.34%; acid mixture: undetected to 50.71%; control: 0.007-33.09%), indicating that acid disinfection altered the microbial ecology to stimulate Escherichia-Shigella growth. These results enhance our understanding of the relationship between lettuce disinfection and ecological changes.
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Affiliation(s)
- Jiayi Wang
- College of Food Science, Shenyang Agricultural University, 120 Dongling Rd., Shenyang 110866, China.
| | - Yeting Sun
- College of Food Science, Shenyang Agricultural University, 120 Dongling Rd., Shenyang 110866, China.
- Vegetable Research Center, Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
| | - Dongbing Tao
- College of Food Science, Shenyang Agricultural University, 120 Dongling Rd., Shenyang 110866, China.
| | - Shan Wang
- College of Food Science, Shenyang Agricultural University, 120 Dongling Rd., Shenyang 110866, China.
| | - Chen Li
- College of Food Science, Shenyang Agricultural University, 120 Dongling Rd., Shenyang 110866, China.
| | - Fenge Zheng
- Shenyang Product Quality Supervision and Inspection Institute, Glide Rd, Shenyang 110136, China.
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, 120 Dongling Rd., Shenyang 110866, China.
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