Thana Phuthidhorn, Boonyawan Dheerawan, Jaikua Mathin, Promsart Woranika, Rueangwong Athitta, Ungwiwatkul Sunisa, Prasertboonyai Kanyarak, Maitip Jakkrawut
Faculty of Science, Energy and Environment, King Mongkut's University of Technology North Bangkok, Rayong Campus, Rayong 21120, Thailand.
Plasma and Beam Physics Research Facility, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
Foods. 2025 Apr 25;14(9):1502. doi: 10.3390/foods14091502.
This study explored the effectiveness of plasma-activated water (PAW), generated by a newly developed compact generator, for decontaminating foodborne bacteria in oyster meats. The generator effectively produced PAW with antibacterial activity when the water passed through the plasma reactor in a single cycle. The temperature of the PAW produced by the developed device did not exceed 40 °C, enabling its direct application to biological tissues immediately after production and discharge from the plasma reactor. The effects of flow rates and post-discharge times on key reactive species-including hydrogen peroxide, nitrite, and nitrate-were analyzed, along with pH and temperature. Freshly produced PAW can completely inhibit both and in vitro, with a 5-log reduction within 5 min of treatment. Application to oyster meats led to an 86.6% and 87.9% inactivation of and , respectively. These research findings indicate that PAW generated using the developed compact flow-through generator holds promise as a food safety solution for households. The fact that complete foodborne pathogen elimination was not achieved emphasizes the need for further optimization.
本研究探讨了一种新开发的紧凑型发生器产生的等离子体活化水（PAW）对牡蛎肉中食源细菌的去污效果。当水在单个循环中通过等离子体反应器时，该发生器有效地产生了具有抗菌活性的PAW。所开发装置产生的PAW温度不超过40°C，使其在从等离子体反应器产生和排放后可立即直接应用于生物组织。分析了流速和放电后时间对包括过氧化氢、亚硝酸盐和硝酸盐在内的关键反应性物种的影响，以及pH值和温度。新产生的PAW在体外可完全抑制[具体细菌名称缺失]，处理5分钟内细菌数量减少5个对数级。将其应用于牡蛎肉，分别导致[具体细菌名称缺失]和[具体细菌名称缺失]的灭活率达到86.6%和87.9%。这些研究结果表明，使用所开发的紧凑型流通式发生器产生的PAW有望成为一种家庭食品安全解决方案。未实现完全消除食源性病原体这一事实强调了进一步优化的必要性。
