title: [Effect of surface-active agents on the electrical properties of bacterial cells].
abstract: The work was aimed at studying the effect of cationic, anionic and non-ionogenic surfactants on the frequency dependence of the electroorientation effect (EOE) and on the electrophoretic mobility (EPM) of rod-like bacteria. The character of concentration dependences was found to differ for EOE and EPM at a low frequency of the electric field (20 to 10(4) Hz). Analysis of EOE changes at a high frequency (4 X 10(5) to 3 X 10(7) Hz) showed that anionic and non-ionogenic surfactants at a concentration up to 10(-3) M did not damage Escherichia coli, a Gram-negative bacterium, in contrast to Bacillus cereus, a Gram-positive bacterium. Cationic surfactants affected the cells of the both species. The optical properties of bacterial cells were found to change under the action of cationic surfactants.
mesh_terms: D001409:Bacillus cereus / Q000187:drug effects* / Q000502:physiology; D004560:Electricity; D004926:Escherichia coli / Q000187:drug effects* / Q000502:physiology; D013501:Surface-Active Agents / Q000494:pharmacology*
chemical_list: D013501:Surface-Active Agents
vernacular_title: Vliianie poverkhnostno-aktivnykh veshchestv na élektricheskie svoĭstva bakterial'nykh kletok.