HPLC法测定注射用头孢地嗪钠的含量

目的：用高效液相色谱法测定注射用头孢地嗪钠的含量。方法：用十八烷基键合硅胶为填充荆;以磷酸盐缓冲液（取磷酸二氢钾0．87g与无水磷酸氢二钠0．22昏加水溶解并稀释至1000ml,摇匀）～乙腈（920：80）k／2流动相,检测波长为262nm,流速为1．0ml／min。结果：该方法在20ug／ml-100ug／ml范围内峰面积与浓度呈良好的线性关系,线性方程为Y=6．7755E-6×＋3．8871E-03（r=0．99996）,回收率为99．3％,重复性实验RSD=0．47％,n=5,结论：方法简便,快速,准确,适用于该产品质量控制。     

联用色谱二维数据中背景的检验和扣除

基于正交投影原理和局部主成分分析,建立了一种新的二维色谱背景消除方法．本法直接以目标投影分辨技术从复杂的重叠峰中分辨出背景光谱并加以扣除,无需已知零组分响应信息,因此对背景存在情况有更广的适应性．     

基于Open Inventor的储层建模系统三维可视化研究

为更好地满足储层建模系统三维可视化改进的需求,在研究软件三维显示功能的基础上,针对原有软件的特点,提出一种将原先只使用OpenGL库进行三维显示的系统改造成利用Open Inventor库与OpenGL库共同实现三维绘制功能的软件思路和实现方法。分析和总结了使用Open Inventor调用OpenGL常见的几种技术。结合储层建模的一般原理,将测井数据和地震数据资料的计算和储层模型的可视化功能进行了分离。     

北海油气资源与周边国家边界划分

人类的物质需求归根到底是一种能量需求。工业革命使人类从利用有机能源跃进到利用无机能源。西欧依靠使用千百年累积起来的能源走出了17世纪危机的困境,北海油气资源的开发成为20世纪西欧复兴的一种自然因素。北海沿岸国家社会经济对北海资源具有很大的依赖性,北海油气资源的占有和使用变成一个人们不得不关注的现实问题。北海丰富的资源和周边国家之间的协议为北海资源开发创造了条件。     

甲基-γ-氨丙基聚硅氧烷的合成及其与甲苯二异氰酸酯交联后的氧氮透气性

由甲基硅单体与γ-氨丙基硅单体共水解缩合得到侧链含γ-氨丙基的聚硅氧烷。通过两种有机硅单体的竞聚率测定,认为以环体形式的硅单体可以聚合得到氨丙基分布较为均匀的聚合物。经甲苯二异氰酸酯交联后的硅橡胶显示出较高的氧氮透气选择比,有利于从空气中富集氧。     

高铝质多孔陶瓷的研制及多孔衬底的制备

本课题是研究高铝质多孔陶瓷的制备工艺 ,并在此基础上研制多孔衬底的制备工艺。一方面 ,以铝矾土为骨料 ,以粘土为结合剂 ,采用泥浆浇注法研制陶瓷管 ;另一方面 ,以α-Al2 O3粉料挤压成型研制出多孔陶瓷片。     

柱色层族组成分离方法对黄芪中脂肪酸和脂肪酸酯的研究

黄采用柱色层族组成分离方法和气相色谱-质谱-计算机联用技术分离和鉴定.从甘肃岷县黄芪中分析鉴定出48种脂肪酸酯、29种脂肪酸、5种芳香酸,其中不饱和脂肪酸占全部脂肪酸的55.50%,亚油酸的含量达41.33%,亚麻酸含量为10.59%,为岷县黄芪的进一步开发应用提供了基础数据.     

Modeling of mass transfer characteristics of bubble column reactor with surfactant present

Danckwert's method was used to determine the specific interfacial area, a, and the individual mass transfer coefficient, kL, during absorption of CO2 in a bubble column with an anionic surfactant in the carbonate-bicarbonate buffer solution and NaAsO2 as catalyst, the presence of which decreases the specific interfacial area and the individual mass transfer coefficient. The specific interfacial area and the individual mass transfer coefficient increase with increasing superficial gas velocity. The specific interfacial area decreases whereas the individual mass transfer coefficient increases with increasing temperature. The results of experiments were used to determine the dependence of a, kL, and kLa on the surface tension, the temperature of the absorption phase, and the superficial velocity of the gas. The calculated results from the correlation were found to be within 10% deviation from the actual experimental results.     

薄层扫描法测定蛇床子提取液中蛇床子素的含量

目的：探讨薄层扫描测定蛇床子素含量的优点,并测定三种不同提取方法提取蛇床子中蛇床子素的提取率。方法：回流提取法、索氏提取法、超声波提取法分别提取中药蛇床子中的蛇床子素,薄层分离后,进行薄层扫描,测出三种方法的提取率。展开剂为石油醚：乙酸乙酯：甲醇=15∶2∶2;扫描条件：测定波长322nm,参比波长370nm,狭缝3。结果：超声波提取法的提取率最高。结论：用薄层扫描法测定蛇床子提取液中蛇床子素含量的方法操作简便,结果准确可靠。     

Metabonomic analysis of hepatitis B virus-induced liver failure: identification of potential diagnostic biomarkers by fuzzy support vector machine

Hepatitis B virus (HBV)-induced liver failure is an emergent liver disease leading to high mortality. The severity of liver failure may be reflected by the profile of some metabolites. This study assessed the potential of using metabolites as biomarkers for liver failure by identifying metabolites with good discriminative performance for its phenotype. The serum samples from 24 HBV-induced liver failure patients and 23 healthy volunteers were collected and analyzed by gas chromatography-mass spectrometry (GC-MS) to generate metabolite profiles. The 24 patients were further grouped into two classes according to the severity of liver failure. Twenty-five commensal peaks in all metabolite profiles were extracted, and the relative area values of these peaks were used as features for each sample. Three algorithms, F-test, k-nearest neighbor (KNN) and fuzzy support vector machine (FSVM) combined with exhaustive search (ES), were employed to identify a subset of metabolites (biomarkers) that best predict liver failure. Based on the achieved experimental dataset, 93.62% predictive accuracy by 6 features was selected with FSVM-ES and three key metabolites, glyceric acid, cis-aconitic acid and citric acid, are identified as potential diagnostic biomarkers.