Studies on biopharmacy of ultra-fine particles of Atractylodes lancea, Phellodendron chinense and a pill composed of the two drugs Ⅰ. Characterization by scanning electron microscopy Accumulation of main alkaloids composition in growth process of different parts of Phellodendron chinense Study on extracting purified active components of Picria fel-terrae , Scutellaria baicalens is andPhellodendron chinense with macroporous resins