固体制剂生产中新工艺路线与设备

通过几种固体制剂生产中新工艺路线与新设备的阐述,阐明了新设备和新工艺布局的优越性,以馈制药工程技术人员参考。     

Cooperative Effect Radiation Loss of Optical Pump Solid Laser

1 Introduction For increasing the output energy of laser, the pumping power must be enhanced. But the cooperative effect will arise and cause spontaneous radiation light in laser medium sample when the pumping power is high e- nough without the resonator. The spontaneous radiation light is coherent light between laser and fluorescent. It will compete the upper energy level population with ex- cited radiation, and the loss increase. In solid laser medium, such as Nd∶YAG, the Nd ion densityi…     

纳米材料应用技术中常见问题随笔

17．何谓固体颗粒的表面改性?固体颗粒表面改性是指采用一定的方法对无机或有机固体颗粒的表面进行处理、精细修饰及加工，有目的改变固体颗粒表面的物理、化学性质，以满足固体颗粒加工及应用的一种技术。     

Analysis of trace mercury in water by solid phase extraction using dithizone modified nanometer titanium dioxide and cold vapor atomic absorption spectrometry

A new method for analysis of trace mercury in water samples was developed, based on the combination of preconcentration/separation using dithizone-modified nanometer titanium dioxide (TiO2) as a solid phase extractant and determination by cold vapor atomic adsorption spectrometry (CVAAS). Dithizone was dissolved with alcohol and loaded on the surface of nano-sized TiO2 powders by stirring. The static adsorption behavior of Hg2 on the dithizone-modified nanoparticles was investigated in detail. It was found that excellent adsorption ratio for Hg2 could be obtained in the pH range of 7-8 with an oscillation time of 15 min, and a 5 mL of 3.5 mol·L-1 HCl solution could quantitatively elute Hg2 from nanometer TiO2 powder. Common coexisting ions caused no obvious influence on the determination of mercury. The mechanisms for the adsorption and desorption were discussed. The detection limit (3σ) for Hg2 was calculated to be 5 ng·L-1. The proposed method was applied to the determination of Hg2 in a mineral water sample and a Zhujiang River water sample. By the standard addition method, the average recoveries were found to be 94.4%-108.3% with RSD (n = 5) of 2.9%-3.5%.     

提高焦炭质量的有效途径

1 焦炭在高炉炼铁中的重要作用 焦炭是炼焦煤料经过高温干馏获得的可燃固体产物，它是质地坚硬、多孔、有裂纹、呈银灰色的块状炭质材料。焦炭是高炉炼铁热处理的重要燃料，其在高炉生产中的作用主要是：     

煤直接液化中SO2-4 /ZrO2固体酸的催化作用

以二苯甲烷、苯乙醚为煤的模型化合物,以四氢萘(THN)为溶剂,进行中高压加氢液化实验,结合产物的气相色谱和质谱分析,考察了SO2-4/ZrO2固体酸对煤直接液化的催化作用及加氢液化机理.实验结果表明,SO2-4/ZrO2固体酸对模型化合物的转化具有良好的催化活性,与非催化液化相比,400 ℃、H2初压5 MPa、30 min时二苯甲烷的转化率由8.96%提高到61.75%,且模型化合物的存在促进了溶剂THN的转化,上述条件下THN的转化率也达到10.92%;模型化合物及THN的转化主要包括氢解、异构、氢转移及烷基化等反应;SO2-4/ZrO2固体酸的催化作用主要为酸催化的离子反应机理,增强催化剂的酸性有利于煤的催化液化.     

固体核径迹氡探测器刻度系数及其受大气压强影响的蒙特卡罗模拟计算

利用氡及其子体在测量容器中的位置分布和衰变时α粒子出射方向的随机性,建立了固体核径迹氧探测器(SSNTD)的刻度系数的蒙特卡罗模拟计算程序。对不同大小的圆柱形容器和不同类型探测片(CR-39、LR-115)氡探测器的刻度系数进行了计算,其结果与已有的实验数据符合较好。     

增塑对UV固化型高分子固体电解质性能的影响

将合成的大分子量的聚乙二醇丙烯酸酯(PEGDA)齐聚物与光引发刑、LiClO4组成光敏体系，与一定比例的碳酸乙烯酯(EC)、碳酸丙烯酯(PC)或其混合物进行混合，经紫外光辐照制得了一种新型的高分子固体电解质膜，考察了增塑刑种类和用量对光固化速率、电导率和机械性能的影响。结果表明，增塑是提高UV固化型高分子固体电解质导电性能的有效方法，在机械性能满足使用要求的条件下，增塑的UV固化型固体电解质的电导率可以高达10^-4S／cm左右。     

固体催化剂提高生物柴油生产的经济性

爱荷华州立大学化学教授Victor Lin开发了一种新的催化剂，该催化剂可以使从植物油和动物脂肪生产生物柴油的成本降低约30％。该固体催化剂可以替代目前使用的可溶性甲醇钠，作为生物燃料生产中油脂的酯交换反应的催化剂。[第一段]