Effect of Combined Plasma-activated Water and Dielectric Barrier Discharge Treatment on the Sterilization and Quality of Fresh-cut Lettuce

LI Xia; QIAN Jing; ZHANG Jianhao; YAN Wenjing

doi:10.13386/j.issn1002-0306.2023100188

Volume 45 Issue 19

Sep. 2024

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Science and Technology of Food Industry > 2024 > 45(19): 196-205. > DOI: 10.13386/j.issn1002-0306.2023100188

LI Xia, QIAN Jing, ZHANG Jianhao, et al. Effect of Combined Plasma-activated Water and Dielectric Barrier Discharge Treatment on the Sterilization and Quality of Fresh-cut Lettuce[J]. Science and Technology of Food Industry, 2024, 45(19): 196−205. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2023100188.

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Effect of Combined Plasma-activated Water and Dielectric Barrier Discharge Treatment on the Sterilization and Quality of Fresh-cut Lettuce

1.
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
2.
School of Public Health, Southeast University, Nanjing 210003, China

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Received Date: October 24, 2023

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Abstract

Abstract

To develop a new method for the sterilization of fresh-cut lettuce, plasma-activated water (PAW) combined with dielectric barrier discharge (DBD) plasma technology was applied in this study. Response surface methodological approach was performed to determine the optimal sterilization process parameters. Meanwhile, the microbial count, color, browning degree, firmness and weight loss rate were evaluated to investigate the effects of combined cold plasma treatments on the qualities of fresh-cut lettuce during the storage. Results showed that the total viable bacteria count on the surface of fresh-cut lettuce was (0.48±0.07) lg CFU/g under the optimal treatment conditions when PAW preparation time was 130 s, PAW soaking time was 5 min, and DBD plasma treatment time was 135 s. Moreover, during 7 days of storage, the combined cold plasma treatments could effectively inhibit the growth of microorganisms, maintain the color and firmness of fresh-cut lettuce, delay the increase of weight loss rate, and inhibit the occurrence of browning, which would effectively prolong the shelf life of fresh-cut lettuce.
- fresh-cut lettuce,
- cold plasma,
- sterilization,
- quality,
- shelf life

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