Objective:To establish the quality standard for compound Yinchen mixture. Methods:A TLC method was used to i-dentify Artemisiae scopariae Herba,Gardeniae Fructus, and Rhei Radix et Rhizoma in the mixture. An HPLC method was used to quan-titatively analyze the concentration of chlorogenic acid and geniposide. Results:The TLC spots were clear without any interference the negative control. The linear range of chlorogenic acid was 0. 04-0. 20 mg·ml-1 ,and that of geniposide was 0. 05-0. 25 mg·ml-1 . The average recovery of chlorogenic acid was 94. 4% with RSD of 1. 85%, and that of geniposide was 102. 2% with RSD of 1. 15%( n=6). Conclusion:The method is accurate,reliable,specific and reproducible,which can be used for the quality control of compound Yinchen mixtures.

Objective To establish the quality control standards for Compound caulis Polygoni multiflori mixture .Meth-ods Caulis polygoni multiflori ,cortex alibiziae and schisand chinensis were identified by TLC ,total flavonoids were deter-mined by UV .Results Caulis polygoni multiflori ,cortex alibiziae and schisand chinensis could be detected by TLC .A better linear relationship between concentration and absorbance in the range of 9 .12~27 .36 μg/ml .The linear regression equation was A=0 .034 55 C-0 .110 34 (r=0 .999 2) ,The average recovery of emodin was 101 .0% (RSD=1 .58% ) .Conclusion The method is simple ,quick ,accurate and sensitive ,which could be used as a quantitative analysis method for this preparation .

Background: To evaluate the feasibility of treating odontoid fractures in the Chinese population with two cortical screws based on computed tomography (CT) scans and describe a new measurement strategy to guide screw insertion in treating these fractures. Methods: A retrospective review of cervical computed tomographic scans of 128 patients (aged 18–76 years; men, 55 [43.0%]) was performed. The minimum external transverse diameter (METD), minimum external anteroposterior diameter (MEAD), maximum screw length (MSL), and screw projection back angle (SPBA) of the odontoid process were measured on coronal and sagittal CT images. Results: The mean values of METD and MEAD were 10.0 ± 1.1 mm and 12.0 ± 1.0 mm, respectively, in men and 9.2 ± 1.0 mm and 11.0 ± 1.0 mm, respectively, in women. Both measurements were significantly higher in men (p < 0.001). In total, 87 individuals (68%) had METD > 9.0 mm that could accommodate two 3.5-mm cortical screws. The mean MSL value and SPBA range were 34.4 ± 2.9 mm and 13.5°–24.2°, respectively, with no statistically significant difference between men and women. Conclusions The insertion of two 3.5-mm cortical screws was possible for anterior fixation of odontoid fractures in 87 patients (68%) in our study, and there was a statistically significant difference between men and women.

Objective:To optimize the ultrasonic extraction process of total alkaloids from Oxytropis falcata bunge. Methods:The independent variables were solvents ratio, extracting time and ethanol concentration, and the dependent variable was content of total al-kaloids. Based on single factor tests, central composite design and response surface methodology was adopted to optimize the extraction technology. Results:The optimal extraction conditions were as follows: extracted twice with 36-fold amount of 72% ethanol ( contai-ning 1% acetic acid) at 60 ℃, and extracted 77 minutes each time. Under the above conditions, the content of total alkaloids was 2. 793 mg·g-1 with the bias ratio less than 2% when compared with the model predictions. Conclusion:Ultrasonic extraction process of total alkaloids from Oxytropis falcata Bunge optimized by central composite design and response surface method is simple, highly pre-cise, reliable and predictable.

Objective To establish a method for analyzing total polysaccharide content and its monosaccharide composition in the caulis polygoni multiflori mixture. Methods The polysaccharides of the caulis polygoni multiflori mixture were extracted by water-extraction and alcohol-precipitation. After the treatment with phenol-sulfuric acid, the content of total polysaccharides in the preparation was determined by ultraviolet spectrophotometry. In addition, after the polysaccharide was hydrolyzed into monosaccharides wtih trifluoroacetic acid, the hyrolysate was derivatized with PMP, and then the PMP derivates of monosaccharides were analyzed by HPLC method. Yilite krosmasil C₁₈(4.6 mm×250 mm, 5 μm) was used at 30 ℃. Acetonitrile-0.1% NaH₂PO₄ (pH=6.8) (16:84) was the moblie phase with a flow rate of 1.0 ml/min. The detecting wavelength was at 250 nm. The injection volume was 20 μl. Results concentration of D-anhydrous glucose in the range of 21 ~ 105 μg/ml had a good linear relationship with the absorbance. The linear regression equation was A= 0.007x+0.0105, r=0.9982. The average recovery rate was (100.45±1.57)% (n=6). The average contents of total polysaccharides in four batches of samples were 14.24, 21.09, 17.85 and 18.17 mg/ml. The polysaccharide of the caulis polygoni multiflori mixture mainly consisted of D-mannose, D-glucosamine D-hydrochloride, D-Galacturonic acid, D-glucose, galactose, L-arabinose. The monosaccharides peak area ratios were about 9.10:0.26:1.00:3.02:4.14:2.12. Conclusion The method is accurate and reliable, and can be used for the determination of total content of polysaccharides and the analysis of monosaccharide composition in the preparation.