查询词典 chemical method

In order to check the corresponding compound at 31P NMR –45.4 ppm, stable pentacoordinate spirobicyclic 2-phenoxy-1,3-phenylene-dioxo-1,3,2-iminoacetoxyphosphoranes were synthesized through a new and efficient method whereby phosphorus pentachloride was displaced stepwise by catechol, N,O-bisamino acid and phenol, or catechol, phenol and N,O-bisamino acid, their 31P NMR chemical shifts are at about 31P NMR –45.0 ppm, the results showed that the compound 4 at 31P NMR –45.4 ppm was pentacoordinate phosphorane containing amino acid residue.

采用磷谱跟踪来研究上述成肽反应机理。例如在氮气保护下，0.1mmol O，O-亚苯基磷酰氯（1）和0.15mmol N，O-二苯丙氨酸（2）苯溶液加入0.6ml核磁管中，混合均匀，反应过程用磷谱检测。反应1分钟后，起始原料1(δp=19ppm)很快转变成N-磷酰苯丙氨酸的三甲基硅基酯（3）(δp=19.8ppm)，在8分钟内，3完全转变成苯丙氨酸磷烷4(δp =-45.4ppm)，同时出现环磷三酯（6）(δp=3.5ppm)。随着反应的进行，对应于化合物4的峰逐渐变小，而6逐渐变大。

Peroxy radical measurement by chemical amplification is one important method of detecting atmospheric RO_x.

过氧自由基化学放大法是一种重要的测定大气过氧自由基的方法。

The real content of mineral in each cement clinker was measured with the method of chemical extraction , the mineral configuration of each clinker was analyzed by microscope petrographic analysis, and then the effect of composition and configuration of clinker on cement strength was studied.

采用化学萃取法检测了各熟料中的矿物实际含量，采用反光显微镜岩相分析法分析了各熟料的矿物形态，分析了熟料矿物组成及矿物形态对水泥强度的影响。

Four series and sixteen solid complexes of rare earth chloride with 1-naphthoic acid (L_1),benzoic acid (L_2),phenylacetic acid (L_3) and Mandelic acid (L_4) have been synthesized by method of solid state reaction at low temperature,and then these complexes were characterized by chemical analysis methods.

本文采用低温固相合成法，以稀土氯化物、1—萘甲酸(HL_1)、苯甲酸(HL_2)、苯乙酸(HL_3)、苯羟乙酸(HL_4)为原料，以六次甲基四胺为质子受体，合成并表征了四个系列十六种固态配合物。

Quantum chemical CNDO/2 method has been performed to study 20 chloranlines on the electronic structure in order to analyze their toxicities to Photobacterium Phosphoreum. The correlation analysis and the step regression analysis are put in use in this paper.

研究氯苯胺类化合物的电子结构与发光菌毒性的关系，应用CNDO/2量子化学方法计算了20个氯苯胺类化合物的电子结构，探讨了发光菌在5、15、30 min时间内的半抑制浓度的负对数P(5-EC50)、P(15-EC50)、P(30-EC50)与化合物的电子结构的关系。

It was found that photochemical deposition of Hg occurred at the layer of TiO2 covering the surface of titanium electrode under UV irradiation, the adsorption of sulfadiazine on the photochemically deposited Hg was stronger than that on the electrochemically deposited Hg, and a method for the determination of sulfadiazine was proposed by the adsorptive stripping voltammetry based on photo-chemical deposition of Hg on Ti electrode.

该研究发现采用紫外光照射钛电极表面氧化钛层能够光催化还原Hg(上标致2+)生成Hg微粒，在Ti基电极上光化学沉积Hg比电化学沉积Hg对磺胺嘧啶具有更强的吸附作用，基于光化学沉积Hg/Ti电极建立了一种吸附溶出伏安法测定磺胺嘧啶的方法。

In the case of the application of electrogenerated, photochemcal; the fluorescence, photochromism, photomagnetic, photoacoustce and other chemical material grafted in plant and animal DNA, as multi-tracer shows a simplified, easy-to-recognition method.

如电化教、平化教的使用；把荧平、平致变色、平磁、平不韵等众种化教量料嫁接在不静植物DNA上，作为示踪表现物，便于简化辨别办法。

SiO 2/TiO 2 superhydrophilic coating on glazed tile substrate was prepared by solgel method,the surface chemical composition, contact angle of water and photographs of surface of the coating were studied by use of XPS,photomicroscopy and SEM.

用溶胶 -凝胶方法在釉面砖上制备了SiO2 /TiO2 超亲水涂层，用XPS、光学显微镜和SEM研究了涂层的表面化学组成、水润湿角和表面形貌。

The in-situ epoxidation and in-situ grafting of unstaturated rubber,in-situ synthetic poly-unstaturated carboxylate,surface in-situ chemical treating of rubber filler,montmorillonite in-situ plugging plyer/peeling,in-situ preparing SiO2 by sol-gel technology were presented.The modification method and effect of rubber were addressed,and the practic application possibility of modificated rubber to rubber goods was researched.

介绍了不饱和橡胶的原位环氧化和原位接枝、原位合成聚不饱和羧酸盐、橡胶填充剂表面原位化学处理、蒙脱土原位插层/剥离、溶胶-凝胶法原位生成SiO2等原位反应合成技术在橡胶加工和改性方面的应用研究工作，讨论了各种改性橡胶方法的特点以及改性效果，并探讨了改性橡胶材料在各种橡胶制品行业实际应用的可能性。

Yunnan Research Institute of Chemical Industry companies successfully developed the "hot method polyphosphoric acid production technology" and the hospital's commitment to National Science and Technology Project 863 "ammonium polyphosphate production technology" to build an annual output of 7000 refers to suck atàknow excellent posture Min Tuan Ling?

公司利用云南省化工研究院开发成功的&热法聚磷酸生产技术&和该院承担的国家863科技计划项目&聚磷酸铵生产技术&，建成年产7000指咂分识嗑哿姿岷湍瓴？

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。