Table 2.
Extraction yields and total phenolic contents of the hot-water extracts

Sample	Yield (%)	TPC (mg GA/mg ext
Caesalpinia sappan L.	8.82	0.182
Rumex crispus L.	4.22	0.036
Aphis chinensis	46.52	0.302
Coptis chinensis	20.1	0.026
Phellodendron amurense	21.86	0.015
Rubia akane Nakai	9.2	0.016
Areca catechu	7.58	0.061
Lithospermum carolinense	44.58	0.003
Curcuma longa Radix	11.34	0.002
Gardenia jasminoides var. grandiflora	29.72	0.002