脉冲电场对微生物细胞作用机理的研究  

Study on pulse electric fields effects on microorganism cell

作　　者：但果[1] 陈思平[1] 汪天富[1] 张新宇[1] 

机构地区：[1]深圳大学信息工程学院,深圳518060

出　　处：《深圳大学学报（理工版）》2008年第1期65-70,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(60772147)

摘　　要：利用微生物细胞介电模型,讨论细胞膜介质的极化时间常数.根据法拉第定律、高斯定律和电荷守恒定律,建立脉冲电场作用下微生物细胞跨膜电压的Laplace方程,分析脉冲电场作用下细胞跨膜电压的变化规律.证明脉冲电场的非热效应强于静电场、指数衰减波脉冲电场和震荡衰减波脉冲电场,为脉冲电场食品处理技术等脉冲电场非热技术提供理论依据.A dielectric model for microorganism cell, which was established from its structure, composition and function, was proposed. The membrane polarization time was determined from cell＇s simplified equivalent circuits. Laplace equations of the proposed model were presented according to Faraday＇s law, Gauss＇s Law and Charge Conservation Law. This study proves theoretically that, in comparison with other electric field, the pulse electric fields （PEF） are able to induce much stronger transmembrane potential on microorganism cells and shows that PEF is desirable to be used in non-thermal food sterilization.

关 键 词：脉冲电场 极化时间 跨膜电压 非热效应 

分 类 号：Q64[生物学—生物物理学] TM15[电气工程—电工理论与新技术]