[Effect of several surface-active substances on the biological and mechanical properties of a catalase monolayer].

It is found out that surface pressure of catalase monolayers increases when some medicinal surface-active agents are added to its substrate, while its enzymic activity decreases depending on the increase of surface activity of the medicinal substance. Catalase monolayer viscosity grows with a decrease in the area. The viscosity decreases with a rise in the dimedrol concentration in the substrate. The same is recorded for the shear module. As to the shear stress characterizing the strength of the monolayers it decreases with the addition of medicinal substances. This change in rheological properties of the catalase monolayer evidences for its structural destruction with an increase in the mixed monolayer pressure.