常压冷等离子体对食源性腐败菌失活作用机制研究

通过常压冷等离子体(atmospheric cold plasma,ACP)处理大肠杆菌和金黄色葡萄球菌,研究其对不同类型食源性腐败微生物失活效果的影响,分别考察处理时间、电源功率、电极间距对菌落数的影响.结果表明:大肠杆菌和金黄色葡萄球菌的菌落减少数随常压冷等离子体处理时间、电源功率的增大或者电极间距的减小而增加.通...

Study on the Inactivation Mechanism of Atmospheric Cold Plasma on Food-borne Spoilage Bacteria

To explore the effects on the inactivation of different types of food-borne spoilage microorganisms,E.coli and S.aureus were treated by atmospheric cold plasma(ACP).The effects of ACP treatment time,power and electrode spacing on colony number were investigated.The results showed that the more reduction of E.coli and S.aureus colony was observed with the increasing treatment time,increasing power or decreasing electrode spacing.Moreover,the changes in morphology,protein leakage and malondialdehyde production of E.coli and S.aureus via ACP were measured,indicating that the inactivation of E.coli and S.aureus was induced by the rupture of the oxidation-induced extracellular membrane and by the etching of the extracellular membrane caused by the physical impact of charged particles.