Objective To establish the fingerprint of Gentiana straminea from Qinghai Province by HPLC. Methods By orthogonal design and related methods based on information theories and chemometrics to optimize the proper HPLC conditions so that the fingerprint spectra of ten groups of different samples have been formed. Results The experimental results are the fact that the common fingerprint peaks, precision, and repeatability in the fingerprint totally meet the relative regulations required in Technical Requirements of the Fingerprint Research in Injection of Chinese Materia Medica (Tentatine Standard). Conclusion The chromatographic fingerprint can be used to identify and evaluate the quality of G. straminea.

Objective To analyze the risk factors for postoperative pulmonary complications (PPCs) in elderly patients with esophageal cancer aged 70 years and over. Methods 185 elderly patients aged 70 years and over after esophagectomy were retrospectively analyzed. Univariate and multivariate logistic regression analysis were used to examine the risk factors for PPCs and related mortality. Results In 185 elderly patients from 70 to 86 years of age with a median age of 72 years, PPCs occurred in 36 patients(19.5%) including pneumonia in 23(63.8%) cases, atelectasis in 3 (8.3%) cases, adult respiratory distress syndrome (ARDS) in 2(5.5%) cases, pulmonary embolism in 1(2.7%) case and respiratory failure in 7(19.4%) cases. The related mortality was 5.9% (11cases) and the causes of death were pneumonia (4 cases), ARDS (1 case), pulmonary embolism (1case) and respiratory failure (5 cases). There were 43 (23.2%) cases with the forced expiratory volume in one second (FEV1%)< 65% before operation. The bleeding volume during operation ranged from 200ml～2000 ml, with a mean volume of about 350ml, and was above 800ml in 8(4.3%) cases. Injury of recurrent laryngeal nerve during operation occurred in 13(7.0%) cases. Univariate and multivariate logistic regression analysis indicated that smoking, obesity, poor preoperative pulmonary function (FEV1 % < 65%), bleeding volume over 800ml during operation and injury of recurrent laryngeal nerve were the independent risk factors for PPCs in elderly patients with esophageal cancer aged 70 years and over. Poor preoperative pulmonary function (FEV1% < 65%)(OR=29.49, P=0.023), bleeding volume over 800ml during operation(OR=32.93, P=0.011) and injury of recurrent laryngeal nerve(OR= 10.14, P= 0.034) were also the independent risk factors for related mortality of PPCs. Conclusions The high risks of PPCs and related mortality in elderly patients with esophageal cancer are not only due to the physiological and pathological characteristics of elderly people, but also due to the operative manipulation.

Objective To establish a method for the content determination of ferulic acid in Bogu Pill(BP). Methods Ferulic acid was obtained by ultrasonic extraction at room temperature and detected by HPLC. HPLC was performed with ODS chromatographic column, methanol-acetonitrile-1%acetic acid(15: 15: 70) as mobile phase and detection wavelength at 323 nm. Results The linearity of ferulic acid was in the range of 0.56 ?g～11.20 ?g/mL(r=0.9996), and the average recovery was 100.26%, RSD=1.48%. Conclusion This method was efficient and can be used for the quality control of BP.

Based on the data obtained from the questionnaire survey and personal in-depth interviews, this study preliminarily formulated the "selection guidelines for the doctoral application review system of Capital Medical University" (draft). In addition, through Delphi method and chi-square test, the author formulated the "selection guidelines for the doctoral application review system of Capital Medical University". The guide contained four primary indicators of scientific literacy, academic ability, scientific research ability and personality quality and 27 secondary indicators. The respondents generally believed that quality, ability and moral character were the core contents of the doctoral selection guide. The doctoral advisors attached great importance to the personality quality of the applicants while having high requirements on the quality and ability. Meanwhile, the doctoral advisors also had high requirements on the scientific research ability of doctoral students in professional degrees.