微机控制自由行程升降机构

微机控制自由行程升降机构是采用计算机控制的机电自由行程升降机构，而国内目前的升降机构一般采用液压驱动，比较而言，本机构结构轻巧、紧凑，运行自如，，生产成本低，升降行程用计算机自由控制，可实现单动、联动、自我检测、故障诊断、操作错误报警、安全停机等功能。本机构的升降速度可以调节，机构采用剪式结构，适用于高空作业，也可用于装、卸、提升等综合性作业的场合，升降速度1～30m／min，     

曙光成功研制“网卡型服务器”

近日，曙光信息产业（北京）有限公司成功研制出带有CPU、内存和存储器的网卡。据介绍，该款智能型网卡相当于给普通网卡装上了一个嵌入式计算机系统、     

电脑室的微机安装与管理

本文着重介绍了电脑室的微机安装与管理方法，以及须要特别注意的一些问题。     

TP801控制凝固点降低法测定分子量

介绍用ＴＰ＿（８０１）微机控制凝固点降低法测定分子量的有关原理和技术，与传统的用贝克曼温度计测△Ｔ方法相比，扩大了测量范围，提高了精密度，工作条件得到改善．     

基于特征造型的注塑件CAD/CAE研究

以某电器零件的特征造型与注塑分析模拟为例，介绍了Pro/Engineer的特点以及在注塑件产品开发中的应用。     

THE TRANSFER BEHAVIOUR OF SOME CATIONS AT WATER／NITROBENZENE INTERFACE BY SEMIDIFFERENTIAL CYCLIC VOLTAMMETRY

The transfer of Sr~(2+) and Ba~(2+) ion, facilitated by 18-Crown-6 present in the aqueous phase, and of succinylcholine ion at w/nb interface were investigated by semi-differential cyclic voltammetry. A good polarographic curve of succinylcholine ion dissolved in water was obtained in the system of 0.01 mol/l LiCl (w)——0.01 mol/l TBATPB (nb). The peak current is directly proportional to the concentration of SC~(2+) ion. It can be used for the determination of SC and the detection limit is 1.05×10~(-5) mol/l.The apparent D~w and D~(nb) have been estimated. The transfer of Sr~(2+) and of Ba~(2+) at the interface are facilitated by 18-Crown-6 present in the aqueous phase and the peak current is directly proportional to the concentration of 18-Crown-6 in water. This method can be used for the determination of the complexing agent and for the stability constant of the complex formed in the aqueous phase.All the experimental results are in keeping with the theoretical.     

谷氨酸诱导的PC12细胞损伤的研究

采用MTT方法观察一定浓度的谷氨酸对PC12细胞活性的影响，结合凝胶电泳和荧光显微镜观察细胞有无DNA断裂和凋亡形态学改变。结果发现谷氨酸确有兴奋毒作用，细胞死亡机制主要为凋亡。