系统节电器在选煤厂的应用

文章介绍了系统节电技术和适合于选煤厂使用的系统节电器 ,结合某选煤厂的实际应用 ,总结了该系统节电器的使用经验及其效果     

国内外超细粉体液固分离技术的发展概况

过滤是固液分离的组成部分。过滤的目的一般是从悬浮液中分离出固体和液体。膜技术作为一种新兴的过滤技术具有其代表意义。它可以截留小到几个纳米的细微颗粒,多用于制造纯净水或化学工业上的某些分子提纯浓缩。     

Isolation of very volatile compounds from the leaves ofLedum palustre using the purge & trap technique

Summary A comparison of different isolation methods for volatile compounds from the leaves ofLedum palustre has been carried out. The aim of the investigation was not to identify all the isolated compounds, though some new compounds were found. Methods used were steam distillation, Soxhlet extraction with n-hexane and the purge & trap technique.The results obtained by the three methods of extraction were compared and it is was found that the very volatile compounds isolated by the purge & trap technique, could not be found by the more conventional methods. The very volatile compounds found by the purge & trap technique were mainly dienals.     

使用代理访问远程并行计算机

使用 WEB技术和代理 ( proxy)机制实现对远程 SP2并行机的访问     

石灰土基层在村镇道路施工中的应用

从原材料的准备、施工工艺、主要质量问题剖析3个方面分析了石灰土基层在村镇道路施工中的应用，总结了石灰土基层在村镇道路施工中的应用经验。     

三凯高速公路大树脚特大桥T型刚构施工工艺

贵州省山区,山高坡陡,施工场地狭窄,T型刚构桥得到广泛的运用.以三凯线大树脚特大桥为例,对T型刚构桥的施工工艺和方法进行总结和分析.     

电子自旋共振年代计时(III)——关于鹿牙和牛牙化石的研究

采用电子自旋共振年代计时方法测定了贵州桐梓马鞍山的鹿牙化石及河北迁安爪村牛牙化石的年龄,它们分别为(1.5±0.2)×10~4a和(3.7±0.5)×10~4a。在研究作为ESR信号来源的顺磁缺陷中心的性质时,还应用了正电子湮没技术。     

浅谈城市道路沥青路面下封层的作用及施工工艺

从沥青路面下封层的主要作用及原理出发，阐述了城市道路沥青路面设置下封层的必要性及常用的施工工艺。     

图书史研究中需要注意的几个问题

从图书馆学的角度出发,对中国图书史研究过程中需要注意的几个问题,如旋风装新旧说之争、造纸术和雕版印刷术的发明时间等予以了分析和探讨,最后提出了自己的倾向性的观点。     

The stopped-flow technique in analytical chemistry

A critical survey of the stopped-flow technique is presented. The instrumentation typically used and the scope of its analytical applications are discussed. The stare-of-the-art of this technique and its wide possibilities in routine analyses are also considered.