20kV/cm高压脉冲电场下外界因素对大肠杆菌杀灭效果的影响  

Effect of Environmental Factors on E.coli Inactivation under 20kV/cm PEF

作　　者：方婷[1] 王仁丽[2] 严志明[1] 陈锦权[1] 

机构地区：[1]福建农林大学食品科学学院,福州350002 [2]大连理工大学电气工程与应用电子技术系,大连116024

出　　处：《贵州大学学报（自然科学版）》2007年第4期431-435,共5页Journal of Guizhou University:Natural Sciences

基　　金：福建省科技厅重大项目(编号2003N018)

摘　　要：在20kV/cm高压脉冲电场作用下,以大肠杆菌为研究对象,随着脉冲数的增加,探讨外部因素如介质温度、介质性质、微生物生长期对高压脉冲电场杀菌效果的影响,结果表明介质温度对大肠杆菌致死的影响并不明显,低pH值会对大肠杆菌的致死起到协同增效的作用,在大肠杆菌延滞生长期时的杀菌效果最好。The effects of environmental factors such as liquid temperature, properties and E. coli growth period on E. coli inactivation with increasing pulse numbers under 20kV/cm PEF were studied. The results showed that liquid temperature did not significantly affect E. coli inactivation, low pH value would enhance the inactivation and in arrearage growth period E. coli was most sensitive to PEF.

关 键 词：外界因素 PEF 大肠杆菌 杀灭效果 

分 类 号：TS205.9[轻工技术与工程—食品科学]