Change in electrosurface properties of Methylomonas rubra cells at contact interaction with particles of silicon dioxide

The addition of highly dispersed silicon dioxide to a suspension of Methylomonas rubra cells under defined conditions resulted in an increasing negative charge in the cells. This phenomenon is not explained in terms of the known conceptions of adsorption processes, in spite of the fact that it is probably a consequence of the contact interaction between cells and silicon dioxide particles.Key words: contact interaction, electrosurface property, silicon dioxide, Methylomonas rubra.