唐钢连铸坯热送热装实践

结合唐钢连铸坯热送热装工作实践，提出做好生产组织协调提高企业整体管理水平是热送热装工作的关键，多品种，批量生产是提高热送热装率的有利条件。     

我国企业科技发展弊端之分析

通过对经济发展与科技发展模式的分析 ,提出做大我国企业的经济规模 ,提高我国企业的国际竞争力 ,进行技术开发与技术创新。采取企业与科技部门相结合 ,处理科技部门与企业之间的关系及科技成果转化困难的问题     

土工编织物和水体运动在治河工程中的应用

介绍土工织物软体排用于聚丙烯编织布和编成网状的聚乙烯绳按设计要求扎成整体排,铺在险工险段的岸边、河底,用石笼和砌石压好,起到护底、护脚、护坡的作用,工程造价低,施工进度快,控制河势恶化,可减少河床、河槽对堤防的冲刷和威胁,其作用有反滤、隔离、防冲、保土、稳定性能强,从十几项防洪水利工程进行中看到聚丙烯编织布在治河、防洪工程中的优缺点,并努力做到扬长避短。     

Effect of steam on heavy oil catalytic pyrolysis

This paper studied the influence of steam on heavy oil catalytic pyrolysis. Experiments of Chinese Daqing atmospheric residue catalytic pyrolysis on CEP-1 were conducted in a confined fluidized bed reactor, with steam and nitrogen being used as the fluidizing gas, respectively. The effects of steam on the volume of contents of the components in pyrolysis gas, product yields, and carbon dioxide formation were discussed. The results of contrast tests showed that steam not only had the action of the fluidizing gas and the dilution gas, but also participated in steam gasification and water-gas shift reactions. In catalytic pyrolysis processes, steam could maintain the activity of catalysts, accelerate the reactions of carbonium ions, inhibit undesired secondary reactions, and enhance the yields and selectivity of the aimed products. Published in Russian in Neftekhimiya, 2007, Vol. 47, No. 2, pp. 99–102. The text was submitted by the authors in English.     

基于微机的X射线分析自动测量系统

本文介绍了一个基于微机的X射线分析自动测量系统。该系统有三个基本功能:自动获取数据、自动换样和处理谱数据。     

Complete physical map of the common deletion region in Williams syndrome and identification and characterization of three novel genes

Williams syndrome (WS) is a contiguous gene deletion disorder caused by haploinsufficiency of genes at 7q11.23. We have shown that hemizygosity of elastin is responsible for one feature of WS, supravalvular aortic stenosis (SVAS). We have also implicated LIM-kinase 1 hemizygosity as a contributing factor to impaired visual-spatial constructive cognition in WS. However, the common WS deletion region has not been completely characterized, and genes for additional features of WS, including mental retardation, infantile hypercalcemia, and unique personality profile, are yet to be discovered. Here, we present a physical map encompassing 1.5 Mb DNA that is commonly deleted in individuals with WS. Fluorescence in situ hybridization analysis of 200 WS individuals shows that WS individuals have the consistent deletion interval. In addition, we identify three novel genes from the common deletion region: WS-betaTRP, WS-bHLH, and BCL7B. WS-betaTRP has four putative beta-transducin (WD40) repeats, and WS-bHLH is a novel basic helix-loop-helix leucine zipper (bHLHZip) gene. BCL7B belongs to a novel family of highly conserved genes. We describe the expression profile and genomic structure for each of these genes. Hemizygous deletion of one or more of these genes may contribute to developmental defects in WS.     

钇、钪分离工艺的新进展

本文简要介绍中国科学院长春应用化学研究所近年来在钇、钪分离工艺研究方面的新进展。     

ConcurrentC语言在分布式系统上的一种高效实现

本文介绍了ＣｏｎｃｕｒｒｅｎｔＣ语言在一分布式系统上的实现。该实现使用了不同于预编译法的编译器的构造方法，同时将Ｃｏｎｃｕｒｒｅｎｔ Ｃ语言中的进程实现为ＵＮＩＸ进程中的用户级线索，是ＣｏｎｃｕｒｒｅｎｔＣ语言在分布式系统上的一种高效实现。     

EC与~（99m）Tc－GH之间的配体交换反应动力学研究

实验表明，ＥＣ浓度与配体交换反应速度常数无关，体系的ｐＨ值对速度常数和９９ｍＴｃ－ＥＣ的标记率影响较大。测定并计算了不同ｐＨ值的交换反应速度常数。结果表明，为保证用配体交换法制备９９ｍｃ－ＥＣ时９９ｍｃ－ＥＣ的标记率大于９０％，体系的ｐＨ值必须≥８。