Studies on preparation of sustained-release Shuxiong formulation, a traditional Chinese medicine ompound recipe, using time-controlled release techniques Energy theory of drug and cooperation mechanism of energy for active ingredients of Chinese materia medica Algal Fossils from Late Precambrian Banded Manganese Formation (BMF), Xiangtan, Hunan Province of China Pharmacokinetic studies of icariin in Chinese formulated medicine Selenium Content in Seedling and Selenium Forms in Rhizospheric Soil of Nicotiana tabacum L.