Flavonoids from roots of Ephedra sinica Experiments on the Cultivation of Chinese Ephedra (Ephedra sinica) onSaline-Alkaline Soil Comparison on constituents from different parts between wild growing and cultivated planting of Ephedra sinica Determination of ephedrine alkal oid s in Ephedra sinica by nona queous capillary electrophoresis Photosynthesis Rate and Stress Tolerance of Two Species of Genus Ephedra Comparison on celluar anti-inflammatory and immunoregulatory activities of seven derivative combinations of Yaotongning with alkaloid as main part and in vivo pharmacodynamic evaluation on optimized candidate combination