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Effects of copper on dielectric properties of E. coli cells
Bai, W; Zhao, KS; Asami, K
2007
发表期刊COLLOIDS AND SURFACES B-BIOINTERFACES
卷号58期号:2页码:#REF!
通讯作者Zhao, KS (reprint author), Beijing Normal Univ, Coll Chem, Beijing 100875, Peoples R China.
摘要Dielectric properties of E. coli cells before and after Cu2+ incubation were investigated by using the dielectric spectroscopic technique. The dielectric spectra are analyzed theoretically by means of the extended three-shell ellipsoidal model, which can reflect the complicated morphological structure of E. coli cell including the outer membrane, the periplasmic space, the inner membrane and the cytoplasm. The results showed that dielectric properties of these cellular components were changed with Cu2+ treatment in a time- and concentration-dependent way. The permttivity of the outer membrane increased with the incubation time and concentration of Cu2+, possibly because polarizability of the outer leaflet of lipopolysaccharides was affected by Cu2+. The conductivity of the periplasmic space decreased with the incubation time and concentration of Cu2+, possibly due to the damage of peptidoglycan. The decreased permittivity of the inner membrane may be caused by disturbance of the lipid bilayer structure produced by Cu2+ incubation. The decreased cytoplasmic conductivity may be the consequence of the leakage of K+ from it. The cytoplasmic permittivity decreased with Cu2+ treatment probably because of the leakage of its some components. (C) 2007 Elsevier B.V. All rights reserved.
文章类型Article
关键词dielectric spectroscopy E. coli copper toxicity outer membrane permittivity
学科领域Biophysics; Chemistry; Materials Science
DOI10.1016/j.colsurfb.2007.02.015
收录类别SCI
WOS类目Biophysics ; Chemistry, Physical ; Materials Science, Biomaterials
WOS记录号WOS:000248038400004
引用统计
被引频次:21[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226181
专题多学科研究中心
推荐引用方式
GB/T 7714
Bai, W,Zhao, KS,Asami, K. Effects of copper on dielectric properties of E. coli cells[J]. COLLOIDS AND SURFACES B-BIOINTERFACES,2007,58(2):#REF!.
APA Bai, W,Zhao, KS,&Asami, K.(2007).Effects of copper on dielectric properties of E. coli cells.COLLOIDS AND SURFACES B-BIOINTERFACES,58(2),#REF!.
MLA Bai, W,et al."Effects of copper on dielectric properties of E. coli cells".COLLOIDS AND SURFACES B-BIOINTERFACES 58.2(2007):#REF!.
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