Fig. 3From: Comparison of the conventional and immersing powdered crude drugs (IPCD) methods for color and extraction of quantitative indicator ingredients in the Kampo formula decoction of daiokanzotoComparison of the amounts of sennoside A extracted from rhubarb alone and daiokanzoto at the end of the conventional (60 min) and IPCD (4 min) methodsEach bar corresponds to the mean ± SEM of four independent experiments* p < 0.05 (t-test)Back to article page