Synergistic inhibitory activity of Glycyrrhizae Radix and Rubi Fructus extracts on biofilm formation of Streptococcus mutans

Table. 1 HPLC analysis of ellagic acid content of Rubi Fructus extract

Extract solvent	Water	50% ethanol	90% ethanol
Extraction yield (%)^a)	12.7	21.2	10.7
Ellagic acid concentration (mmol/g)^b)	1.55	1.17	1.10

^a) Extraction yield (%) = weight of solid after extraction (g) / weight of Rubi Fructus used (g) × 100
^b) Amount of ellagic acid per gram of Rubi Fructus extract

ISSN: 2662-7671