纳米氧化镁灭菌效果与抑菌能力研究

目的：研究纳米氧化镁(MgO)灭菌效果与抑菌能力。方法：将不同量的MaO粉体分散于染菌菌片载体上放置不同时间，计算其杀灭率以评价MaO粉体的灭菌能力；将不同量的MaO粉体混合菌液放置在摇床中振荡不同时间，计算其抑菌率以评价MgO粉体的抑菌能力。结果：①纳米氧化镁能有效杀灭大肠杆菌，对枯草杆菌黑色变种芽孢也有显著的杀灭效果；②纳米氧化镁对金黄色葡萄球菌和枯草杆菌黑色变种芽孢有很好的抑菌作用；③纳米氧化物的磨蚀性、碱性、氧化性以及对微生物的静电吸附使它具有抑菌和杀菌作用。结论：纳米氧化镁粉体有较强的杀菌效果和抑菌能力。

A study on germicidal and antibacterial efficacy of nano MgO

Objective: To study the germicidal and antibacterial efficacy of nano magnesium oxide (MgO). Methods: The antibacterial efficacy was evaluated in the shake flask test, while the germicidal efficacy was evaluated in the carrier germicidal test. Results: it was shown that Nano MgO had excellent germicidal efficacy to the Escherichia coli and Staphylococcus aureus. To such spore as Bacillus subtilis var.niger spore, Nano MgO also produced good germicidal effect. It was proposed that abrasiveness, alkalinity, electrostatic attraction, and oxidizing power of nano MgO all combined to promote these biocidal properties. Conclusion: Nano MgO has good germicidal and antibacterial effect.