Fig. 1

Dose-dependency of virucidal activity of one compound titrated while other compound not was altered. The slope determined via linear regression for urea titration at indicated constant citric acid concentrations (darker triangles) and vice versa (lighter triangles) is plotted on the y-axis. The x-axis represents the concentration of the compound held constant. Only values for concentrations ranging from 1.0 % to 2.5 % were taken into account. Higher values point to steeper slopes and thus greater dose-dependency of virucidal effect. Slopes of dose-dependent antiviral effects against PV (a), AdV (b) and polyomavirus SV40 (SV40) (c) are depicted