Fingerprint of Plantaginis Semen and determination of its two index contents Study on absorption ingredients of Plantaginis Semen by in vitro everted intestinal sac method Antidiarrheal effects of different processed products of Plantaginis Semen and optimization of processing technology by CCD-RSM Optimization of supercritical CO2 extraction of Plantaginis Semen oil by response surface methodology and studies on its antioxidant activity Identification of Plantaginis Semen based on ITS2 and psbA-trnH sequences