Stereoselective Synthesis of δ-Selanyl Allylic Alcohols by Hydrozirconation of Propargyl Selenides

Hydrozirconation of propargyl selenides afford(E)-3-selanyl vinylzirconocenes chlorides 2.Intermediates 2 reacted with aldehydes to obtain δ-selanyl allylic alcohols.     

薛家湾污水处理厂工艺改进方案可行性研究

薛家湾污水处理厂现有工艺主要存在的问题是出水水质差且污泥浓缩困难;各单元处理之间,设备、构筑物之间的不匹配现象突出,个别单元处理效率低,损耗大;当地严重缺水而处理水外排造成巨大浪费.针对这种情况,提出气浮-水解-活性污泥法加储水库工艺、A-B法加储水库工艺等两种方案作为本工艺改进方案,并重新选择配套设备,进行可行性的分析和比较,预期取得巨大的环境、社会和经济效益.     

中西药合用治疗肝硬化腹水

中西药合用治疗肝硬化腹水疗效较好.笔者就近6年来有关本病的中西医结合治疗综述如下.     

Further progress in atom transfer radical polymerizations conducted in a waterborne system

An improved atom transfer radical polymerization (ATRP) process was developed for use in a waterborne miniemulsion system. To conduct a successful ATRP in a heterogeneous waterborne system, it is of great importance to ensure control over the polymerization process while preserving colloidal stability. Efforts devoted to optimization of reaction conditions and improvement in the overall productivity of the process allowed the development of a novel, practical initiation system for ATRP suitable for use in a miniemulsion procedure that can provide copolymers of well-defined composition (e.g., block copolymers) and topologies (e.g., multiarm polymer). © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 3606–3614, 2003     

Study on the Synthesis of Metabolite CM2 of Clausenamide

Synthesis of the optically active metabolite of clausenamide cm2(3,5-dihydroxy-5-(α-hydroxylbenzyl)-1-methyl-4-benzylpyrrolidin-2-one)from 3-O-acetyl-clausenamide was described.     

物理疗法综合治疗周围性面神经麻痹的疗效观察

应用超短波与多步程序中频电疗面神经麻痹158例，经临床观察，急性期单纯应用超短波可及早控制炎症水肿，改善面部血液循环，减轻神经受压，转入恢复期后应用超短波加多步程序中频电综合治疗可使神经传导功能恢复和增强肌肉的收缩，使失神经支配的瘫痪面肌得到训练，从而改善神经系统的功能状态．     

过渡金属氢化物和聚集双键化合物反应的研究Ⅲ.用ESR方法考察二茂锆氢化物与RNCS的反应机理

本文用ESR方法考察了Cp₂ZrH) Cl与RNCSR=C₆H₅,c-C₆H₁₁,n-C₄H₉)的反应的过程,结果表明,在这类反应过程中,Zr-H键发生均裂,中心金属锆经过+4-→+3-→+4的价态变化,反应通过自由基机理进行.     

导数示波极谱法测定废水中微量的对硝基苯乙酮

对硝基苯乙酮在０．０２５ｍｏｌ·Ｌ－１乙二胺－０．０１０ｍｏｌ·Ｌ－１ＥＤＴＡ底液中，产生一灵敏的极谱峰电流．峰电位为－０．３５Ｖ（ｖｓ．ＳＣＥ）．对硝基苯乙酮浓度在３．００×１０－８～１．００×１０－４ｍｏｌ·Ｌ－１范围内，浓度与峰电流成线性关系．检测限为３．００×１０－８ｍｏｌ·Ｌ－１．本方法用于氯霉素制药厂废水中的对硝基苯乙酮的测定，取得满意的结果     

NEW SYNTHETIC METHOD OF 4,4''''-OXYBIS(BENZOIC ACID)AND ITS APPLICATION IN POLYESTER

4,4'-Oxybis(benzoic acid)(Ⅰ)is an important monomer for making synthetic resin,heat resistant filmand liquid crystal fiber,etc.It has been synthesized either by the oxidation of 4,4'-dimethyl diphenylether,or by the electrophilic substitution of diphenyl ether,these substituents introduced into thebenzene ring can be further transformed into carboxylic groups.Diphenyl ethers are usually prepared fromphenols and halobenzenes through Ullmann resction.Due to the high reaction temerature(usually above200℃),long time heating and the formation of isomers,it is difficult to obtain pure products in highyields.     

Top介子在高能正负电子对撞机上的产生

在顶色辅助的人工色(TC2)模型框架下,研究了中性top介子和顶夸克的联合产生过程e+e–→ttπ0t.结果显示此过程的产生截面比标准模型和最小超对称标准模型中e+e–→ttH过程的产生截面都要大.在TC2模型合理的参数空间内,其产生截面可达20fb.通过此过程可在将来的对撞机上探测中性top介子.