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2013 | 11 | 5 | 801-810
Tytuł artykułu

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

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
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. [...]
Wydawca

Czasopismo
Rocznik
Tom
11
Numer
5
Strony
801-810
Opis fizyczny
Daty
wydano
2013-05-01
online
2013-02-27
Twórcy
autor
  • Rostislaw Kaischev Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria, any_gyurova@abv.bg
  • 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
  • Department of Microbial Genetics, Institute of Microbiology, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • Rostislaw Kaischev Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-013-0220-9
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