The influence of synthetic surfactants belonging to different classes on changes in the hydrophobicity of the cell surface of the bacterial strain Micrococcus luteus 1-i was studied. The hydrophobicity index was studied by the MATH method (microbial adhesion to hydrocarbon). Four representatives of different classes of surfactants were tested: sodium dodecyl sulfate (anionic surfactant), cetyltrimethylammonium bromide (cationic surfactant), Tween-80 (nonionic surfactant) and polyvinyl alcohol (polymer surfactant). It was shown that the hydrophobicity of M. luteus 1-i cells changed to varying degrees under the influence of the studied surfactants. A comparison of their molar concentrations, which have a negative effect on the hydrophobicity parameter, made it possible to rank these compounds in the following order (as the degree of reduction in hydrophobicity decreases): Tween-80 > sodium dodecyl sulfate > cetyltrimethylammonium bromide. The experimental data obtained are of practical interest in terms of studying the characteristics of the interaction of the tested bacterial strain M. luteus 1-i with electrode surfaces and substrates (components of wastewater and waste) in microbial fuel cell technology.

Kazarinova Tatyana Filippovna, Candidate of Sciences (Biology), Associate Professor, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: tkazarinova@mail.ru

Buentueva Ulyana Vitalievna, Student, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: ulyna.buentueva@mail.ru

Zhdanova Galina Olegovna, Research Assistant, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: zhdanova86@yandex.ru

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