Modeling the inactivation of Bacillus cereus in tiger nut milk treated with cold atmospheric pressure plasma
Open accessAbstract
The impact of cold atmospheric pressure plasma treatment on the inactivation kinetics of Bacillus cereus ATCC 14579 and the resulting quality changes was investigated in tiger nut (Cyperus esculentus L.) milk (TNM). The effect of input power (39, 43, and 46 W) and treatment time (0 to 270 s) was fitted using the Weibull model to represent the microbial kinetic inactivation in the treated TNM. Inactivation efficacy increased with an increase in treatment time and input power. A 5.28-log reduction was achieved at 39 to 46 W without significant changes in titratable acidity, whereas no reduction in titratable acidity was observed in the pasteurized sample. The inactivation kinetics was adequately described by the Weibull model. Higher input power of 43 and 46 W and 120 s of treatment resulted in marked decreases in pH, flavonoid concentration, and antioxidant activity compared with those parameters in pasteurized TNM. Increases in total color difference and phenolic concentrations also were observed. The results indicate that these changes were caused by the immanent plasma reactive species. This study provides valuable inactivation kinetics information for food safety assessment studies of B. cereus vegetative cells in TNM.
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The TA increase is attributed to microbial fermentation processes during storage.
“This upward trend was attributed to microbial fermentation processes during storage: the extensive growth and proliferation of microorganisms (e.g., yeasts and lactic acid bacteria) in coconut water led to the consumption of sugars and the production of organic acids such as lactic acid and acetic acid, which collectively contributed to the increase in TA [40].”
From Effect of Atmospheric Cold Plasma Treatment on the Microorganism Growth, Diversity, and Quality of Coconut Water During Refrigerator Storage (2025) · cites this paper as [40]
The ‘Reactive species generated in plasma-treated TNM’ section reports increased titratable acidity, but in tiger nut milk during plasma treatment, not coconut water during storage. It links the increase to treatment duration, input power, and possible chemical changes; it does not support the attributed explanation involving microbial fermentation, sugar consumption, or production of lactic and acetic acids. Page numbers were not supplied in our copy. (LLM, conf=0.86)
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Research works printed but not linked: 8
- Chen, Q., K. Saito, and H. Shirai. 2008. Atmospheric pressure plasma using electrolyte solution as cathode. Presented at the International Interdisciplinary Symposium on Gaseous and Liquid Plasmas, Sendai, Japan, 5 to 6 September 2008.
- Hojnik, N., U. Cvelbar, G. Tavčar-Kalcher, J. L. Walsh, and I. Križaj. 2017. Mycotoxin decontamination of food: cold atmospheric pressure plasma versus ''classic'' decontamination. Toxins (Basel) 9. https://doi.org/10.3390/toxins9050151 · DOI
- Liao, X., D. Liu, Q. Xiang, J. Ahn, S. Chen, X. Ye, and T. Ding. 2017. Inactivation mechanisms of non-thermal plasma on microbes: a review. Food Control 75:83-91.
- Liao, X., A. I. Muhammad, S. Chen, Y. Hu, X. Ye, D. Liu, and T. Ding. 2018. Bacterial spore inactivation induced by cold plasma. Crit. Rev. Food Sci. Nutr. 59:2562-2572. https://doi.org/10.1080/ 10408398.2018.1460797 · DOI
- Liu, Z. C., D. X. Liu, C. Chen, D. Li, A. J. Yang, M. Z. Rong, H. L. Chen, and M. G. Kong. 2015. Physicochemical processes in the indirect interaction between surface air plasma and deionized water. J. Phys. D Appl. Phys. 48. https://doi.org/10.1088/0022-3727/48/49/ 495201 · DOI
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Zeng, L., Gu, W., Wang, Y., Deng, W., Wang, J., & Zhang, L. (2025) · Foods · doi:10.3390/foods14152709 · Cited by 3 · see citing works
- Authors
- Muhammad, A. I., Lv, R., Liao, X., Chen, W., Liu, D., Ye, X., Chen, S., & Ding, T.
- Affiliations
- Zhejiang University (CN)
- Corresponding author
- Liu, Donghong
- Ding, Tian
- ORCID
- Venue
- Journal of Food Protection
- Publisher
- Elsevier BV
- Published
- 2019-11
- Volume
- 82
- Issue
- 11
- Pages
- 1828-1836
- ISSN
- 0362-028X (ISSN-L)
- OpenAlex
- W2980177326
- Cited by
- 17
- References
- 0
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 5 · 2021: 3 · 2020: 2
- FWCI
- 1.66
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Food Protection (publishedVersion)
- PubMed (publishedVersion)
- Funders
- China Scholarship Council (2017YFD0400403)
- National Key Research and Development Program of China (2017YFD0400403)
- Topics
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Plasma Applications and Diagnostics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Microbial Inactivation Methods
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Listeria monocytogenes in Food Safety
- Keywords
- cold atmospheric plasma, Bacillus cereus, tiger nut milk, Cyperus esculentus, microbial inactivation kinetics, Weibull model, input power, treatment duration, titratable acidity, antioxidant activity, flavonoids, phenolic compounds, color change, food safety
- MeSH terms
- Atmospheric Pressure, Bacillus cereus, Food Microbiology, Models, Biological, Spores, Bacterial, Microbial Viability, Plasma Gases
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