苏皖沿江地区城市空间结构的定量分析

本文选用了19个经济、社会指标、对苏皖沿江地区的区内差异作了聚类分析。其聚类结果对确定南京等市的功能定位有重要的参考价值。在此基础上运用公式计算了区内所有城市的住置中心性，可作为评价各市投资环境的一种重要的判断依据。     

建设高水平的专业项目管理团队——沈阳精诚建设项目管理公司发展之路

随着我国经济的快速发展，尤其是加入WTO后，现代项目管理理论被引进国内，很多企业通过学习和了解，接受并采纳了这一先进的管理模式。在各行各业从事投资管理的人们尝试各种新的管理方式和方法的同时，致力于走专业化发展的项目管理道路的精诚公司应运而生。沈阳精诚建设项目管理公司成立于2003年7月，专职从事建设投资项目全过程管理。     

上海里弄和近年联排住宅的布局比较

里弄是上海地区很有特色的住宅形式。文章对旧有的新式里弄和近年在市郊开发的联排住宅小区的布局作了比较,探讨借鉴里弄住宅的特色开发联排式住宅小区。     

Enzymatic biosensor for nitrite detection based on direct electron transfer by CPO-ILEMB/Au@MoS2/GC

Journal of Applied Electrochemistry - A novel nitrite electrochemical biosensor is constructed by glassy carbon electrodes (GC) coated by chloroperoxidase (CPO) -Au nanoparticles-MoS2 nanoflowers...     

Selective hydrogenation of furfural to cyclopentanone over Cu-Ni-Al hydrotalcite-based catalysts

A series of Cu-Ni-Al hydrotalcites derived oxides with a (Cu+Ni)/Al mole ratio of 3 with varied Cu/Ni mole ratio (from 0.017 to 0.5, with a Cu ratio of 0.0125 to 0.25) were prepared by co-precipitation method, then applied to the hydrogenation of furfural in aqueous. Their catalytic performance for liquid phase hydrogenation of furfural to prepare cyclopentanone was described in detail, considering reaction temperature, catalyst composition, reaction time and so on. The yield of cyclopentanone was influenced by the mole ratio of Cu-Ni-Al based heterogeneous catalyst and depended on the reaction conditions. The yield of cyclopentanone was up to 95.8% when the reaction was carried out under 413 K with H₂ pressure of 40 bar for 8 h. The catalysts were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and H₂ temperature-programmed reduction (H₂-TPR).     

一步法合成(E)-1,3-二取代丙-2-烯-1-酮类化合物

报道了一种温和的,以二氧化锰为氧化剂,通过串联氧化反应-Wittig反应-氧化反应,一步制备(E)-1,3-二取代丙-2-烯-1-酮类化合物的合成方法。使用该方法,我们合成7个具有代表性的化合物。     

离线低辐射镀膜玻璃

对离线低辐射镀膜玻璃的发展进行了介绍,指出单银、双银和三银离线低辐射镀膜玻璃因为膜系结构的不同而在生产和运营成本上产生了很大差异,进一步分析了3种不同产品的性能及对建筑节能性的影响。     

Palladium‐Catalyzed Oxidative Carbonylation of Aromatic C−H Bonds with Alcohols using Molybdenum Hexacarbonyl as the Carbon Monoxide Source

With molybdenum hexacarbonyl as the carbon monoxide source, a general palladium‐catalyzed carbonylative transformation of the C−H bond on aromatic rings to produce esters has been developed. Good yields of the corresponding products have been obtained with wide functional group tolerance and excellent regioselectivity. A variety of aliphatic alcohols are suitable reactants here.

     

Editorial for rare metals,special issue on photocatalysis

<正>Burning of fuels is an irreversible entropy increasing process, requiring additional energies derived from the environment to let the process cycle. In theory, photon energy delivered from the sun could fix the huge energy demand in a clean and sustainable way. Photocatalysis is such an ideal approach to reconvert inert molecules directly into fuels and other chemical feedstocks using photon energy without