Study on quality standard of Eucommia ulmoides based on absorbed active components in rat plasma Study on quality standard of Psammosilene tunicoides based on absorbed active components in rat plasma Metabonomics on toxicity reduction of Glycyrrhizae Radix et Rhizoma for Aconiti Lateralis Radix Preparata in Sini Tang Pharmacokinetic study on combined application of gastrodin and puerarin in rats