新型助滤剂在溶剂脱蜡装置的应用

大连石化第二酮苯脱蜡装置生产减四线重润料时，添加R192助滤剂进行标定试验。工业试验表明，在原料中注入助滤剂，通过改变石蜡结晶的结构，改进了脱蜡过程，加快了脱蜡过滤速度，对脱油段也有良好的助滤效果。当助滤剂加入量为400mg／L时，装置处理量由634t／d提高到754t／d，过滤速度由106kg／（h·m^2）提高到126kg／（h·m^2），装置处理能力提高了约19％。脱蜡油收率由49．48％提高到51．09％。     

以煤炭为基础的能源化工发展战略初探

本文阐述了发展我国洁净煤技术的意义和基本原则，着重就建立我国以煤炭为基础的能源化工体系的有关问题进行了探讨。     

PAK4, a novel effector for Cdc42Hs, is implicated in the reorganization of the actin cytoskeleton and in the formation of filopodia

The GTPases Rac and Cdc42Hs control diverse cellular functions. In addition to being mediators of intracellular signaling cascades, they have important roles in cell morphogenesis and mitogenesis. We have identified a novel PAK-related kinase, PAK4, as a new effector molecule for Cdc42Hs. PAK4 interacts only with the activated form of Cdc42Hs through its GTPase-binding domain (GBD). Co-expression of PAK4 and the constitutively active Cdc42HsV12 causes the redistribution of PAK4 to the brefeldin A-sensitive compartment of the Golgi membrane and the subsequent induction of filopodia and actin polymerization. Importantly, the reorganization of the actin cytoskeleton is dependent on PAK4 kinase activity and on its interaction with Cdc42Hs. Thus, unlike other members of the PAK family, PAK4 provides a novel link between Cdc42Hs and the actin cytoskeleton. The cellular locations of PAK4 and Cdc42Hs suggest a role for the Golgi in cell morphogenesis.     

提高硫化铅红外探测器的探测率和可靠性的有效途径

本文通过对不同结构的硫化铅红外探测器的剖析和性能优劣对比,说明了新型场镜—硫化铅组合结构是提高硫化铅红外探测器的探测率和可靠性的有效途径。     

Miniaturised branch-line balun with bandwidth enhancement

A miniaturised branch-line balun with bandwidth enhancement is investigated. The improved performance is achieved by meandering the branches and attaching a quarter-wavelength stub at the upper right corner of the conventional branch-line balun. Centred at 1.5 GHz, the introduced balun is optimally designed and validated by experiments. A circuit size of 20% is achieved as compared to the conventional type, and good electrical performance is observed.     

渤海湾盆地东濮凹陷天然气成藏条件与富集规律

渤海湾盆地东濮凹陷具有下第三系和上古生界2套烃源岩,生烃中心控制着气藏分布,构造特征控制着天然气的聚集,盐岩、厚层泥岩盖层有利于天然气藏的保存,生、储、盖组合关系决定了天然气纵向上的分段性。深层高异常压力和次生孔隙发育带是天然气富集高产的重要条件。东濮凹陷天然气分为上古生界煤成气和下第三系凝析气2种成藏模式,具有晚期成藏和幕式成藏的特点。东濮凹陷目前天然气剩余资源量较大,是中国东部重要的天然气勘探开发阵地,下一步应以下第三系凝析气藏和上古生界煤成气藏作为勘探的重点。      

Synthesis of polyacrylonitrile via reverse atom transfer radial polymerization (ATRP) initiated by diethyl 2,3‐dicyano‐2,3‐diphenylsuccinate,FeCl3, and triphenylphosphine

The reverse atom transfer radical polymerization (RATRP) technique using FeCl₃/triphenyl‐phosphine (PPh₃) complex as a catalyst was applied to the living radical polymerization of acrylonitrile (AN). A hexa‐substituted ethane thermal iniferter, diethyl 2,3‐dicyano‐2,3‐diphenylsuccinate (DCDPS), was first used as the initiator in this iron‐based RATRP initiation system. A FeCl₃ to PPh₃ ratio of 1:3 not only gives the best control of molecular weight and its distribution but also provides a rather rapid reaction rate. The rate of polymerization increases with increasing the polymerization temperature and the apparent activation energy was calculated to be 54.9 kJ mol^?1. Because the polymers obtained were end‐functionalized by chlorine atoms, they were used as macro‐initiators to proceed the chain extension polymerization in the presence of an FeCl₂/PPh₃ catalyst system via a conventional ATRP process. Copyright © 2005 Society of Chemical Industry     

云南水电生态化的生态补偿

就水电站建立生态补偿的策略、技术、标准、数量、程序、步骤等进行了讨论，指出溪洛渡和向家坝水电站生态补偿机制的建立面临的困难，针对这些实际困难提出了有关生态补偿的对策和建议。     

城市固体废物处理模式研究进展

由于每种城市固体废物处理技术均具有各自的优势和局限性,从技术本身、经济性和环境影响角度分析,均只适宜处理城市固体废物中的某些组分,因此,为了解决这种单一处理方式的不足,城市固体废物需要采取综合处理方式.在此基础上,论述了固体废物综合处理的研究现状和存在的问题,本文认为固体废物综合处理系统代表了固体废物处理方式的发展方向.     

漳泽水库水环境现状与防治对策

分析了漳泽水库的水质污染现状及形成原因,从政策法规的完善和落实、调节汛限水位、加强流域内生活垃圾的管理、加强河道治理和建立生态管理信息系统等五个方面阐述了防治对策。