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Sterilization Efficiency of a Novel Electrochemical Disinfectant against Staphylococcus aureus

机译：新型电化学消毒剂对金黄色葡萄球菌的杀菌效率

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摘要

Disinfection of hazardous microorganisms that may challenge environmental safety is a crudal issue for economic and public health. Here, we explore the potential of a novel electrochemical disinfectant named plasma activated water (PAW), which was generated by nonthermal plasma, for inactivating Staphylococcus aureus (S. aureus). Meanwhile, the influence of bovine serum albumin (BSA) on the PAW disinfection efficacy was investigated. In the presence of BSA, PAW treatments achieved a reduction of S. aureus ranging from 2.1 to 5.5 Log, when without BSA it reached 7 Log. The sterilization efficacy depended on the PAW treatment time of S. aureus and plasma activation time for PAW generation. The results of electron spin resonance spectra showed the concentrations of hydroxyl radical (OH●) and nitric oxide radical (NO●) in water activated by plasma for 10 min (10-PAW) were higher than those in water activated by plasma for 5 min (5-PAW). Additionally, the physiological analysis of S. aureus demonstrated that the integrity of cell membrane, membrane potential, and intracellular pH homeostasis as well as DNA structure were damaged by PAW, and the molecule structure and chemical bonds of S. aureus were also altered due to PAW. Thus, PAW can be a promising chemical-free and environmentally friendly electrochemical disinfectant for application in the medical and food industries.
机译：可能威胁环境安全的有害微生物的消毒是经济和公共卫生的重要问题。在这里，我们探索了一种由非热等离子体产生的名为血浆活化水（PAW）的新型电化学消毒剂用于灭活金黄色葡萄球菌（S. aureus）的潜力。同时，研究了牛血清白蛋白（BSA）对PAW消毒效果的影响。在存在BSA的情况下，PAW处理可将金黄色葡萄球菌的含量从2.1 Log降低到5.5 Log，而在没有BSA的情况下，PAW处理达到7 Log。灭菌效果取决于金黄色葡萄球菌的PAW处理时间和产生PAW的血浆活化时间。电子自旋共振谱的结果表明，等离子体活化10 min（10-PAW）的水中的羟自由基（OH●）和一氧化氮自由基（NO●）的浓度高于等离子体活化5 min的水中的羟基自由基和一氧化氮自由基（NO●）的浓度。 （5-PAW）。此外，金黄色葡萄球菌的生理学分析表明，PAW破坏了细胞膜的完整性，膜电位和细胞内pH稳态以及DNA结构，并且金黄色葡萄球菌的分子结构和化学键也发生了改变。爪子。因此，PAW可以成为有前途的无化学药品和环境友好型电化学消毒剂，用于医疗和食品行业。

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  • 来源
    《Environmental Science & Technology》 |2016年第6期|3184-3192|共9页
  • 作者

    Qian Zhang; Ruonan Ma; Ying Tian; Bo Su; Kaile Wang; Shuang Yu; Jue Zhang; Jing Fang;

  • 作者单位

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China;

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China;

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China;

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China;

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China;

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China;

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China,College of Engineering, Peking University, Beijing 100871, P. R. China;

    Academy for Advanced Interdisciplinary Studies Peking University, Beijing 100871, P. R. China,College of Engineering, Peking University, Beijing 100871, P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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