Applications of Tritiated Thymidine Incorporation in Determination of Bacterial Growth Rate Q-TRAP-LC-MS/MS analysis on nucleosides in Pseudostellariae Radix with different processing methods Determination of nine kinds of nucleosides in Spirodelae Herba from different habitats by UPLC-MS/MS Chemical constituents in Yi Medicine Blaps japonensis and their cytotoxic activities Studles on the Water Soluble Constituentsof Chinese Drug Beimu , the Bulbs of Fritillaria Plants The Effects of Allitridum on the Proliferation of Rabbit Aortic Smooth Muscle Cells in Vitro DNA Synthesis in Microspores in Anther Culture of Wheat (Triticum aestivum L.) Construction of Pichia pastoris Surface Display Technology as Whole -cell Biocatalyst for Thymidine Phosphorylase Nitrogenous chemical constituents from Carthamus tinctorius