Investigation of Partial Oxidation of Methane to Syngas on Rh/SiO2-Using 1H-NMR

In our previous work, POM has been investigated by the pulse reaction with CH₄ and CH₄/O₂ respectively, on Rh/SiO₂ catalyst. Kinetic isotopic effect was also studied by using CD₄ and CD₄/O₂. The results suggest that POM may proceed most possibly via a mechanism of surface carbon species reacting with surface oxygen. In the present work, ¹H MAS NMR was utilized to investigate the POM mechanism in aiming of presenting additional evidence.     

Novel Synthesis of Nanometer Crystal-sized Zeolite NaY by Adding Lanthanum-containing Compounds

Nanometer-sized zeolite possesses many distinct advantages^[1,2] comparing with its commercially available micrometer-sized counterpart^[3], and receives much attention in recent years. In this work, a novel synthesis of nanometer-sized zeolite NaY is presented.     

妊娠晚期重型流行性出血热抢救成功1例

回顾分析了1例妊娠晚期重型流行性出血热。结果表明,抢救成功的原因为及时正确诊断和早期血液透析。可见尽早进行血液透析是抢救重型流行性出血热的关键措施。     

Synthesis and Electrochemical Properties of a Novel Poly(ether sulfone) with Oligoaniline Pendants

A novel poly(ether sulfone) with oligoaniline pendants(PESOP) was prepared by K₂CO₃-mediated nucleophilic polycondensation and characterized with Fourier-transform infrared spectrometry(FTIR), ¹H nuclear magnetic resonance(¹H NMR) and gel permeation chromatography(GPC). The cyclic voltammetry(CV) curve of PESOP reveals the reversible electroactivity. In the electrochromism study, PESOP film exhibited good electrochromic properties with a high contrast value, moderate switching time and acceptable coloration efficiency. After running 1000 cycles, the PESOP/indium-tin oxide(ITO) electrochromic device remained unchanged except for the drifting of base line, which certified its good electro-photo stability of the fabricated electrochromic device. Moreover, the polarization technique and electrochemical impedance spectroscopy(EIS) were used to study the anticorrosion performance of PESOP coatings on the cold rolled steel(CRS) in a 5%(mass fraction) NaCl solution. All the results indicate that the obtained PESOP is a competitive candidate as anticorrosion material.     

异质材料微流体通道电渗流热效应

本文对玻璃和聚二甲基硅氧烷(PDMS)材料制作的微流控芯片电渗流焦耳热效应进行数值研究.采用双电层的Poisson-Boltzmann方程,液体运动的Navier-Stokes方程和液-固耦合系统的热传导方程研究二维微通道电渗流的温度特性.研究发现:由于材料属性的差别,温度场和速度场在微通道断面存在不均匀性.微通道表面的温升会降低双电层的电荷密度.热效应会对电渗流速度场产生影响,并诱导压强梯度和改变外电场在微通道的变化特征.     

Using reproducing kernel for solving a class of partial differential equation with variable-coefficients

How to solve the partial differential equation has been attached importance to by all kinds of fields. The exact solution to a class of partial differential equation with variable-coefficient is obtained in reproducing kernel space. For getting the approximate solution, give an iterative method, convergence of the iterative method is proved. The numerical example shows that our method is effective and good practicability.     

用Dot-ELISA检测马鼻肺炎病毒抗体的研究

用从德国引进的马鼻肺炎(EHV-1)标准毒株经BHK-21细胞传代增殖，免疫家兔，制备高免血清，提取IgG并用辣根过氧化物酶(HRP)进行标记，建立了能够大量、快速、特异地检测马鼻肺炎的斑点-酶联免疫吸附实验(Dot-ELISA)方法，并应用此方法对100份马血、2份野马流产胎儿病料及从野马流产胎儿病料中分离的毒株PH93-1进行了检测，结果证明，本方法具有较好的特异性和敏感性，而且操作简便、快速，是一种适用于马鼻肺炎的诊断、流行病学调查、检疫和监测的良好方法。     

多功能太阳辐射计

太阳辐射计是测量太阳直接辐射光谱特性的仪器,本仪器的设计特点是不仅能测量太阳直接辐射的光谱特性,还能测量太阳角散射(日晕)辐射特性。仪器在PC微机控制下,能自动对准和跟踪太阳,完成转换滤光片、调整增益、定时采集和存储数据等全部测量工作。现场实验表明所得大气光学厚度数据有较高的精度,甚至可以得到其变化情况。     

2-苯硫基苯并咪唑的合成

在不使用金属催化剂、配体及强碱的情况下,以DMF为溶剂,于130℃反应24 h,2-巯基苯并咪唑与二苯基碘三氟甲磺酸盐高选择性地发生芳基化反应,合成了2-苯硫基苯并咪唑,收率80.7%,其结构经1H NMR和13C NMR确证。     

TiO2表面氧空位对Rup2P/TiO2/ITO薄膜电极光致电荷转移的影响

采用改性的TiCl4水解法制备出三种不同表面性质的TiO2-X(X=5,10,20,X表示加入NaOH的浓度,单位为mo·lL-1)样品.利用(1,10-邻菲咯啉)2-2-(2-吡啶基)苯咪唑钌混配配合物(Rup2P)作为敏化剂,制备出Rup2P/TiO2-5/ITO(铟锡金属氧化物)、Rup2P/TiO2-10/ITO和Rup2P/TiO2-20/ITO表面敏化薄膜电极.测试结果表明三种薄膜电极的光电转换效率Rup2P/TiO2-10/ITO最高,Rup2P/TiO2-20/ITO次之,Rup2P/TiO2-5/ITO最低.利用吸收光谱、表面光电压(SP)谱、荧光光谱和表面光电流作用谱等分析了Rup2P和三种TiO2的能带结构和表面性质;利用光致循环伏安和表面光电流作用谱研究了三种Rup2P/TiO2-X/ITO薄膜电极的光致界面电荷转移过程.结果表明,在光致界面电荷转移过程中,TiO2层表面氧空位对Rup2P/TiO2-X/ITO薄膜电极光致电荷转移产生重要影响.并进一步讨论了Rup2P/TiO2-X/ITO薄膜电极的光电流产生机理.