Establishment of screening method for γ-aminobutyric acid transaminase inhibitor and its application in screening constituents in Gastrodiae Rhizoma Study on integrative technology of primary processing for Gastrodiae Rhizoma based on response surface methodology Effects of different drying methods on quality of Gastrodiae Rhizoma Odour correlation study during preparation process of Gastrodiae Rhizoma Formula Granule Simultaneous determination of eight active components in Gastrodiae Rhizoma by HPLC-MS Study on effect of combined application on distribution of gastrodigenin in rats Effects of different processing methods on effective components and sulfur dioxide residue in Gastrodiae Rhizoma Pharmacokinetics of gastrodin from Tiangou Jiangya capsule in rats