AIM: To determine the content of terpenelactones in Yinxingye Soft Capsule(Folium Ginkgo). METHODS: HPLC with Evaporative Light Scattering Detector (ELSD) was established to determine the content of terpenelactones in Yinxingye Soft Capsule. The analysis was carried out on C 18 column. The mobile phase was 1-propanol-THF-water(1∶15∶84). The operating conditions of the ELSD were a nebulizer nitrogen flow-rate of 3.5L?min -1 and an evaporator tube temperature of 115℃. RESULTS: No interference was found in the terpenelactones peak position. The method was simple, with a good linear relationship. The relative standard deviation of reproducibility was 1.04% and the average recovery was 97.1%. CONCLUSION: The method can be used for quality control.

The conidia of Pseudomonas Migula Y 1were mutagenized by NTG, Co 60 and UV respectively. Chitosanase-producing mutant of Pseudomonas Migula Y 8 was obtained by screening with the method of transparent zones . Its chitosanase activity was 3.0 U?mL, -1 which has increased by six times approximately. The method of UV was better than others.

Objective: To investigate the preparation procedure of Zhenjing Xiehuo granules. Methods: Using the dry extract yielding rate and the contents of liquiritin and salvianolic acid B as the indices, an orthogonal test was adopted to choose the best ex-traction and purification technology. Using the qualified ratio of granules as the index, an orthogonal test was adopted to choose the best preparation process of the granules. Results:The optimized preparation conditions were as follows:Pulvis ferri was decocted first for 60 min. The other medicines were dipped in 8-fold amount of water for 90 min, and then added into pulvis ferri extracts and decocted for 3 times with 90 min for each time. The extracts were collected and concentrated till the relative density was 1. 3 (measured at 60℃), water was added with the dilution ratio of 1:2, ethanol was added till the percentage of ethanol was 50%, and then the mixed liquid was filtered after 24 hours. After ethanol was recycled from the filtrate, the filtrate was concentrated till the relative density was 1. 3 (measured at 60℃), and then dried at 60℃. Starch as the diluent, the ratio of extract to excipient was 1:0. 8, and the wet granules were prepared with 90% ethanol as the wetting agent, dried 3 hours at 60℃ followed by size stabilization to obtain the products. Con-clusion:The optimized preparation procedure of Zhenjing Xiehuo granules is stable and feasible.