[Interaction of some Pseudomonas genus representatives with high-dispersed silicon dioxide particles]

The effect of increase of a negative charge in the cell during contact interaction with silicon dioxide particles similar to those previously obtained for methanotrophic bacteria was observed in pseudomonads. The microelectrophoretic method application has allowed to find a capsule and consists of uncharged components in Pseudomonas batumici bacterial cells; the capsule thickness was determined by conditions of microorganisms cultivation. The effect of increase of a negative charge took place for the cells grown on the Kozer medium where they formed a capsule of smaller dimensions. It is supposed that the sorption of silicon dioxide particles on the bacterial surface initiates the conformational changes of porins. As a result, the quantity of the charged groups increases and thickness of the surface layer in which these groups are located also augments.