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Journal

2013 | 11 | 5 | 801-810

Article title

Low frequency electric polarizability and zeta-potential of Escherichia coli HB101 (K-12) cells during inactivation with ethanol

Content

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Languages of publication

EN

Abstracts

EN
The electric properties of bacteria determine their non-specific interactions with the environment, in particular their pathogenic activity. The electric polarizability of Escherichia coli HB101 (K-12 strain) was studied while inactivation with ethanol (20–40 vol.%). The current investigation might be regarded as a continuation of previous research on the polarizability of E. coli at lower ethanol concentration (≤ 20 vol.%) and higher frequencies (≥ 20 kHz). The bacteria polarizability at low frequencies (4 Hz) shows anomalies (unexpected increase in the polarizability at certain ethanol concentrations), while the parameter decreases with an increase in the ethanol concentration at higher frequencies. We investigated for the possible reasons causing the anomalies - in our case reduced to the medium dielectric permittivity, the average cell length and the surface electric charge density distribution, related to bacterial lipopolysaccharides. We suggest a hypothesis for the molecular mechanism of changing the surface charge of E. coli, carried by lipopolysaccharides, induced by the non-ionic ethanol. [...]

Publisher

Journal

Year

Volume

11

Issue

5

Pages

801-810

Physical description

Dates

published
1 - 5 - 2013
online
27 - 2 - 2013

Contributors

author
  • Rostislaw Kaischev Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • Department of Biophysics and Radiobiology, Faculty of Biology, Sofia University St. Kliment Ochridski, 1164, Sofia, Bulgaria
  • Department of Microbial Genetics, Institute of Microbiology, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
author
  • Department of Microbial Genetics, Institute of Microbiology, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
author
  • Rostislaw Kaischev Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11532-013-0220-9
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