查询词典 precursors

Optically active propargylic alcohols are very useful and important precursors to many chiral organic compounds including natural products, pharmaceutical compounds and macromolecules.

手性丙炔醇是非常重要的合成中间体，广泛应用于天然产物、药物以及复杂大分子化合物等的合成。

In chapter 2, typical pyrolytic method was developed and sulfates were used to replace the traditional precursors with lower decomposition temperatures.

第二章，对传统融盐法讨论基础上，提出以硫酸盐代替传统的低分解温度前驱物的方案。

Polyimide/silica (PI/SiO2) nano-hybrid films of different solid content were prepared based on pyromellitic dianhydride and 4, 4'-oxydianiline using tetraethoxysilane as the inorganic precursors.

以均苯四甲酸二酐和4，4'-二氨基二苯醚为有机单体，正硅酸乙酯为无机前驱体，制备了SiO2含量一定，PAA杂化胶液固体含量不同的PI/SiO2纳米杂化薄膜。

The precursors of zeolite catalyst was synthesized by the reaction with salicylaldehyde.

而且一会儿说MCM-41，一会儿说Ti-MCM-41，这两者也是不同的。2。

Chapter 8 analyzes and explains seismic and electrical anisotropic precursors and their development with the preparation of Yongdeng earthquake Ms 5.8 occurred in July, 22th, 1995, and their relations with P axis of earthquake mechanism solution. The data are collected from Lanzhou and Langsue digital seismographic stations and Songshan electrical-magnetic station.

第8章用CDSN兰州台、中法合作朗索台的三分量数字记录小震资料，和中法合作松山台的电磁连续观测资料，分析了1995年7月22日永登5.8级地震前后快S波偏振方向、电性主轴方向与震源机制解P轴方向的关系，发现三者震前的协调一致性。

T. LOUIS, Mo., Sep 4,2008---SAFC Hitech focus area within SAFC a member of the Sigma-Aldrich Group (NASDAQ: SIAL), today announced that it has made significant progress in developing Germanium Antimony Telluride precursors for use in high volume manufacturing phase change memory applications.

AFC Hitech宣布锗-锑-碲材料(GexSbyTez或GST)的开发取得重大进展，GST前驱体用于批量生产相变存储器。

Using ethylene glycol as solvent, all the three source materials were takingpart in polyreaction of gel. The solubility of bismuth subnitrate in ethyleneglycol was accelerated greatly due to the production of nitrate ester during thepolymerization of precursors.

SBT粉体的溶胶—凝胶制备过程表明：在以乙二醇为溶剂时，三种原材料都参与了聚合反应，前驱物聚合反应过程中有硝酸酯产生，因而促进了硝酸氧铋在乙二醇溶液中的溶解性能。

In my work, mesoporous lamellar zincum sulfide is synthesized by hydrothermal techniques, with CTAB as templates and Zinc acetate and sulfourea as precursors. The best reactive condition is as follows: the ratio of reactive components is CTAB:Zinc acetate:sulfourea:water=1:3:10:1388; the volume of pH is 4.4; the best hydrothermal parameter is 100℃ for 48h.

以十六烷基三甲基溴化铵为模板剂合成层状介孔硫化锌的最佳反应条件为CTAB：Zn2：(NH2)CS：H2O=1：3：10：1388，pH值范围为3.8-5.8， 100℃下水热48h，此时得到的样品呈现一套层状介孔结构，相应的晶面间距为33.0 A，16.7 A，11.1 A。

The major part of this thesis is about the syntheses and EPR studies of a series of radical pair precursors (55, 56 and 57) which contain 1-toluene sulphonyl benzimidazoles as the key components.

本篇论文主要的部分为一系列自由基对前驱物1-对甲苯磺醯基-苯咪唑及其衍生物55、56、57的合成与低温EPR光谱之研究。

Orbital LCH frequently occurs in the supratemporal frontal bone as stem cell precursors of Langerhans cells are located in hematopoetic bone marrow in the frontal bone.

眼眶朗格汉斯组织细胞症最常发生在颞上额骨，因为朗格汉斯的干细胞母体位于额骨的生血骨髓内。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。