Effect of Synthetic Surfactants on the Hydrophobicity of Micrococcus luteus Cells 1-i

• Published in: The Bulletin of Irkutsk State University. Series Biology. Ecology 2024, Vol.47, p.55-63
• Main Authors: Kazarinova, T. F., Buentueva, U. V., Zhdanova, G. O.
• Format: Article
• Language: English
• ISSN: 2073-3372
• DOI: 10.26516/2073-3372.2024.47.55

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.