Preparation and stability of digalactosyl diglyceride as emulsifier forsub-microemulsion Study on integrative technology of primary processing for Gastrodiae Rhizoma based on response surface methodology Study on formulation of liquid-solid compressed tablets of total triterpenoids from Sclerotii Poriae Cortex Preparation of glycyrrhetinic acid niosomes and optimization of its prescription process Optimization of processing technology for Psoraleae Fructus by D-optimal response surface methodology with UHPLC