查询词典 halide

On the basis of the above-stated examination and their comparison with digital still cameras, it has been predicted that the production of silver halide photographic materials will be slowly expanded in the world in future.

可以肯定，感光材料的性能提高尚有很大的余地。依据上述的考察及其与静态数字照相的比较，可预测未来世界的卤化银感光材料生产的发展会趋缓。

Four extracting agents for Lanthanides/Actinides separation , dialkyldithiophosphinic acids, were synthesized from PSCl3 and alkyl halide by Grignard reaction, sulfuration and acidification.

以PSCl3和卤代烷为原料，经格氏反应、硫化和酸化合成了用于镧/锕分离的4个萃取剂——二烷基二硫代次膦酸，其结构经NMR，IR和MS表征。

The catalyst includes: supported Ziegler-Natta catalyst of titanium halide compound and organic electron donor compound supported with MgCl2 alcoholate carrier; aluminoxane prepared with trialkyl aluminum and water; and one kind of organic electron donor, such as organosilicon compound R2Si(OCH3)2, where R is phenyl, isopropyl, isobutyl or cyclopentyl.

该催化剂包括，a一种负载型的Ziegler-Natta催化剂，即将卤钛化合物和有机给电子体化合物负载在氯化镁醇合物载体上得到的固体催化剂，b一种通过三烷基铝与水反应而制备得到的铝氧烷和c一种有机电子给体，如有机硅化合物R 2 Si(OCH 3 ) 2 ，其中R为苯基、异丙基、异丁基或环戊基。

A reaction pathway for ammonolysis of O,O-dimethylphosphorochloridothioate without catalyst was proposed,based on the reaction mechanism of acyl halide ammonolysis ,and the pseudo-homogeneous reaction kinetics were founded.

模型表明：在反应前期，O，O-二甲基硫代磷酰氯浓度对速率影响很小，反应速率呈拟一级反应特征；但在反应后期，反应速率呈明显的二级反应特征。

For the synthesis of NHC precursors, there are also several routes: condensation of glyoxal, amines and paraformaldehyde; alkylation of imidazole or monosubstituted imidazole with alkyl halide; annulation of ortho esters and 1,2-diamines; ring closure of hydrazines or amides with acetic anhydride; reduction of thiones with Na/K in THF.

关于N-杂环卡宾前体的合成途径主要有：乙二醛、伯胺和多聚甲醛的缩合反应；卤代烷与咪唑及其取代咪唑的烷基化反应；原甲酸酯与1，2-二胺的成环反应；肼或酰胺与酸酐的环化反应；用Na/K对环硫脲化合物的还原反应。

On the base of studying on the adsorption of sensitizing dye and antihalation dyes on silver halide crystals with UV-spectrum, we focused on the effects of antihalation dyes on the formation of J aggregates of the sensitizing dye and emulsions′ sensitivity.

增感染料在卤化银微晶上吸附并形成J 聚集体是染料光谱增感和超增感的关键步骤。

In this paper, the technique of pinch sealing for the arc tube of metal halide lamp s is introduced.

本文介绍了金属卤化物灯电弧管压封工艺技术，同时还介绍了一种先进的半自动金属卤化物灯电弧管压封设备。

Keywords ceramic metal halide lamp;arc tube;new technology

陶瓷金属卤化物灯；电弧管；新技术

By reaction of alkyl halide with metallic sodium or hydrogen acid to restore the alkyl halide obtained.

可由卤代烷与金属钠反应或以氢碘酸还原卤代烷制得。

By altering the carbon chain length,substitutional group on carbon chain,monoamine cations or biamine cations,metal cation and halide anion,we could adjust the interlayer distance,linear alkyl amines conformation and the interaction between linear alkyl amines and metal halide octahedra.

通过改变直链烷基胺的碳链长度、取代基、单双胺以及无机层的金属离子、卤素离子，可以调控无机层的层间距、烷基链段的排列以及烷基链与无机层的作用力等。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐