Abstract

An investigation of sterilization by a low-temperature microwave-generated atmospheric pressure plasma jet (MAPPJ) is presented. Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and yeast Saccharomyces species (Saccharomyces sp.) at 1.0 × 10³ and 1.0 × 10⁴ cfu/mL dilutions are investigated and fungi tested experimentally. The MAPPJ is generated by several watt continuous-wave microwaves and Ar gas, and direct treatment of the bacteria by a programmable planar XY motorized translation stage. After several minutes of plasma treatment, the number of bacterial colonies was sufficiently reduced and found to be nearly zero, and bare ozone and nitrogen dioxide were observed. This investigation shows that plasma sterilization would be a novel application for solid-state microwave power sources.

摘要

介绍了低温微波产生的大气压等离子体射流 (MAPPJ) 对灭菌的研究。^{1.0 × 10 3}和 1.0 × 10 ^4的大肠杆菌( E. coli )、金黄色葡萄球菌( S. aureus ) 和酵母菌属( Saccharomyces sp. )研究了 cfu/mL 稀释液并通过实验测试了真菌。MAPPJ 由数瓦连续波微波和 Ar 气体产生，并通过可编程平面 XY 电动平移台直接处理细菌。等离子处理几分钟后，细菌菌落数充分减少，几乎为零，并观察到裸露的臭氧和二氧化氮。这项研究表明，等离子灭菌将是固态微波电源的一种新应用。