Anhydrous esterification of myristic acid with propylene: Ion exchange resin and acid-treated clay as catalysts

Anhydrous esterification of myristic acid with propylene was carried out in the temperature range of 110–145°C and pressure from 190–195 psig in the presence of Amberlyst-15 (cation exchange resin) and Filtrol-24 (acid-treated clay) as catalysts. The product ester, isopropyl myristate finds use in cosmetic and topical medicinal preparations where good absorption through the skin is desired. Filtrol-24 is the catalyst of choice, and the recommended operating temperature is 130°C with a pressure of 190 psig.     

阳离子交换树脂铁中毒的复苏研究

软化器中使用的阳离子交换树脂容易受到铁离子的污染。采用均匀设计的方法,利用回归分析和最优化技术,研究了复苏剂中各组分对阳离子复苏效果的影响,得出了最佳复苏配方,开发出了一种新的复苏方法。这种方法具有腐蚀性低和复苏效果良好的特点,为生产现场树脂的复苏提供了有益的借鉴。     

稀土元素的分离技术

对目前稀土元素分离过程中几种常用的分离技术进行了综述，使用得较多的仍然是溶剂萃取法和离子交换法，而且新方法也在不断地出现。     

某炼油厂一级浮床除盐系统阳床工艺特性及调整试验

论述了某厂一级除盐系统阳床工艺特性及调整试验过程，对存在问题进行分析并改进，得到了实际运行最佳方式和参数，取得良好效果。     

被动累积~(222)Rn-~(222)Rn探测器

本文采用 2只扩散杯 ,一只选择渗透率较大的滤膜 ,使2 2 2 Rn和2 2 0 Rn能很容易的进入。另一只选择渗透率较小的滤膜 ,该滤膜只允许2 2 2 Rn进入 ,半衰期较短的2 2 0 Rn被阻挡在外面。通过不同滤膜扩散率的差异 ,改变探测器的空气交换率 ,从而达到同时测量2 2 2 Rn和2 2 0 Rn的目的     

激光微焊接质量的模糊识别技术研究

讨论了激光微焊点焊接质量的模糊识别的概念，数学模型及其应用方法，并介绍了系统的硬件组成。     

ATM交换机的硬件体系结构探讨

本文首先对ＡＴＭ的背景作了一个简单的介绍，接着阐述了ＡＴＭ和ＡＴＭ交换机的主要原理和技术，然后从硬件系结构的角度具体地分析了一种实验ＡＴＭ交换机是怎样ＡＴＭ技术的详细方法。     

Electrochemical intercalation in NiOx thin films

In this work we investigated the mechanism of the electrochemical intercalation reactions in rf sputtered nickel oxide thin films electrodes by two techniques: mechanical stress change measurements by means of an optical technique and mass changes using an electrochemical quartz microbalance (EQCM). The experiments were performed in alkaline electrolytes containing cations of the first column of the periodic table. Reversible mass and volume changes were observed. In order to explain these experimental results, an exchange reaction is proposed, in which the oxidation process is accompanied by the deinteractional of a relative large number of “light” cations, simultaneously with the intercalation of a smaller number of heaviest cations.     

基因工程干扰素对慢性粒细胞白血病骨髓细胞DNA损伤修复的影响

以姊妹染色体互换为观察指标．观察了干扰素对慢性粒细胞白血病骨髓细胞DNA损伤修复的影响，探讨了干扰素对慢性粒细胞白血病的治疗机理，对指导临床治疗具有重要的意义。