PEO-PPO嵌段共聚物反胶束的形成及其热力学行为

水增溶;临界胶束浓度;PEO-PPO嵌段共聚物反胶束的形成及其热力学行为     

KF/Al_2O_3催化合成8-氯-4-(2-氯-4-氟苯氧基)喹啉

8-氯-4-(2-氯-4-氟苯氧基)喹啉(CCFQ)是DowElanco公司开发的新颖杀菌剂,它具有独特的杀菌机理—抑制与嘧啶生物合成有关的二氢乳清酸酯脱氢酶[1],能防治对现有杀菌剂产生抗性的病原菌,与现有杀菌剂无交互抗性,并且可与多种杀菌剂复配增效.文献[2]合成条件苛刻,原料损失很大,且需色谱分离提纯,收率较低.为解决以上问题,本文以固载氟化钾为催化剂,对4,8-二氯喹啉和2-氯-4-氟苯酚的缩合反应进行研究,发现催化缩合法条件温和,分离方法简单,收率可达75%.ClNCl FOHClKF/Al2O3ClNOClF主要仪器为NICOLET60SXR-FTIR红外光谱仪,KBr压…     

四硫富瓦烯四硫醇(ttftt~(4-))Zn盐配位高分子化合物的合成、表征及性能

在绝对乙醇介质中制备出 2个系列四硫富瓦烯四硫醇 ttftt4- ( tetrathiafulvalene tetrathiolate) Zn盐的配位高分子化合物 ,其组成分别为 [( Zn-ttftt) Mx]n( M=Mn,Co,Ni,Cu,Hg;x=0 .3,0 .4 ,0 .5 ,1 .3,0 .7)及[( Zn-ttftt) Lny]n( Ln=La,Er,y=0 .5 ;Ln=Nd,Eu,y=0 .6) .化合物在室温下均为在空气中稳定的黑色无定形粉末状固体 .用红外光谱及 X射线光电子能谱对化合物进行了表征 ,并进行了元素分析、热分析和电导率测定 . 2 5℃时 ,化合物均为典型半导体 .化合物 [( Zn-ttftt) Ni0 .5· 1 .9Et OH]n 的室温电导率高达 3.6S/cm     

电堆积与等速电泳结合的毛细管电泳进样富集方法的研究

 提出电堆积与等速电泳结合的毛细管电泳进样富集方法 ,并对电堆积和等速电泳进样富集的最佳条件进行了研究。在 15kV电压 ,电堆积进样 70s和等速电泳富集 40s条件下 ,对两种结构相近的药物普萘洛尔和美托洛尔用毛细管区带电泳法进行了分离。pH 4.0 ,30mmol/L醋酸钠 醋酸、30mmol/Lβ 丙氨酸 醋酸和 1.5 mmol/L醋酸钠 醋酸溶液分别作背景 (或前导 )、尾随和样品缓冲液。与常规电迁移进样方法比较 ,信号增强因子约为 2 5 0和16 0 ;总分析时间与常规法相近。     

利用相位共轭极化拍频光谱术测量原子能级差与激光绝对频率

研究了级联三能级系统中的相位共轭极化拍频光谱术.发现其对能级差的测量精度决定于光学跃迁的均匀增宽.在符合拍频条件时,两独立光源拍频的频差可以超出激光线宽,激光绝对频率的测量精度可达到与激光线宽同一量级. 关键词：     

Optimizing Film Design and Application for the Recordable Compact Disk Developed by Two Cyanine Dye Samples

The optical constants of two cyanine dye films we prepared have been measured by a RAP-1 typed spectroscopic ellipsometer. On the basis of making a simplified model for the wafers of a recordable compact disk (CD-R), the optimizing designs for them developed by the cyanine dye films are given. In addition, the dynamic storage performances of two sample disks have been tested by our dynamic storage testing system. Measurement results of the sample disks are obtained to test our film designs.     

Application of Alternative K-Nearest Neighbor method to Classification of Alloy Samples

Pattern Recognition is one of main methods that can resolve structure of chemistry and classification of compounds. In chemistry, K-Nearest Neighbor method (KNN) is mostly used for recognition of compounds that are not classified by a linear method. ALKNN (Alternative KNN) is an improvement of KNN. The method is based on the classification rules which are produced by using standards and knowledge. The unknown samples are,then, classified with the aid of the rules.     

添加剂对TiO2/水分散体流变性的影响

研究了TiO₂生产中有关助剂对其流变性能的影响,得到了TiO₂/水分散体的流变性能与三乙醇胺用量之间的关系,并找到了最佳用量.实验发现,六偏磷酸钠为分散剂时,其使用效果有时间依赖性;碳酸铵作絮凝剂时则对分散体的流变性能和形成的絮凝体有影响.     

直线度误差的光电非接触测量方法

基于光电检测技术,利用回转和轴向进给伺服系统,通过激光扫描检测系统测量刀口尺与被测零件素线之间的间隙,实现了对直线度误差的非接触自动测量。详细论述了直线度误差的测量方法和光电检测系统,通过实验对系统的测量精度进行了验证。     

Optical Recording Performance of Azo Nickel Chelate Thin Film

1IntroduCtionAndyeshavebeenwidelystudiedasmaterialsforreverwhleoPticalstorae,forholographasanexamPle,inwhichisomerizatiOnofazomoeculesekistSbetWeentransandcisform['~'].HOWever,therearetwomainproblemswhichhavelindtedtheirfurtherpracticalaPplications.oneisthatthesbetransformationspeedbetweenisomers,vawingfroInseveralhacrosecondstoseveralseconds,can'tmeetthehighspeeddemandofdatastorage.Theotheristhattheunstablecisstateofazodyesthermallyre-isomerizestothemorestabletransisomerverycommnly.Aithou…