Fig. 2From: Synergistic inhibitory activity of Glycyrrhizae Radix and Rubi Fructus extracts on biofilm formation of Streptococcus mutansEffect of Rubi Fructus extract on the GTase activity of S. mutans. GTase activity was determined by measuring the amount of insoluble glucan at a wavelength of 540 nm. The tested concentration of all extract was 2.5 g/L. Values that differ from the control with a 95% confidence level are marked with an asterisk on top of the barsBack to article page