乙炔

The material is prepared by mixing barium titanate 80～99% and acetylene black 1～5% with PbO-B2O3 0～15% proportionally, grinding in agate grinder or in ball mill, press forming at pressure 2～10Mpa under vacuum or protecting gas environment.

按80％～99％的钛酸钡、1％～5％的乙炔黑和0％～1 5％的PbO-B2O3玻璃粉的比例混合后，在玛瑙研钵中研磨或者在球磨机中研磨，以压力为2～10MPa压制成型，该陶瓷材料的制备需要在真空或者保护气体的保护下进行。

We calculate the correlation energy of poly (para-phenylene-vinylene) chain and the band energy gap value of PPV with taking the long-range electron correlation into account, and we discuss the influence of the correlation energy on the band energy gap.

在考虑电子-电子相互作用情况下，对基态非简并聚合物聚对苯乙炔的长程关联能进行了理论计算，并用长程关联能对带隙进行修正，最后讨论了长程关联能对带隙的影响。

Under catalysis of AlCl3, trans-1-chloro-3-phenyl-1-propen-3-one was first prepared using benzoyl chloride and acetylene in CH2Cl2 at 20~25℃, which the yield is 7% higher than that in CCl4 at 40~45℃.

通过对其反应条件的研究，首次用苯甲酰氯和乙炔在三氯化铝作用下合成出反－3-苯基－1-氯－1-丙烯－3-酮；并发现用二氯甲烷作介质在20~25℃下的反应产率，比用四氯化碳作介质在40~45℃下的反应产率约高7%。

A method for the determination of silver in impregnated activated carbon by air-C2H2 flame atomic absorption spectrometry was set up.

本研究建立了一种用空气-乙炔火焰原子吸收分光光度法测定浸渍活性炭中银含量的分析方法，对酸介质浓度、共存元素的干扰进行了探讨，在0～1.0mg/L范围内，银含量与吸光度呈线性关系，相关系数为0.9999。

The favorite pathway of the migration is a translation to the nearest cross-bridge site, with a rotation through 30°simultaneously.

同时给出了迁移途径中乙炔分子的碳碳键长，碳氢键角等结构参数在迁移过程中的变化。

He had an acetylene6 torch for cutting thick steel plates and beams.

在我听来，那乙炔炬发出的切割声比蒸汽机火车头发出的声音还要大。

This paper discussed three methods of producting vinyl etherspreparation from acetylene ,dehydrohalogenation and acetals.

论述了乙烯基醚类化合物的三种主要制备方法乙炔法、脱卤化氢法和缩醛热分解法。

The first part of this thesis summarized the synthetical condition and the latest application of various alkynes.

本论文第一部分对各种炔烃的合成条件作了系统综述。并对二茂铁乙炔近年来的应用作了概述。

Recently, ''click'' reaction has been regarded as a simple and versatile coupling strategy for the functionalization of nanoparticles.12 It is a green and ecient coupling approach, utilizing the copper-catalyzed 1,2,3-triazole formation between azides and terminal acetylenes.

近来，&点击&反应已经被看作一种用于纳米粒子功能化的简单而万能的偶联策略。[12] 它是一种绿色而有效的偶联方法，利用叠氮化物和端乙炔之间的铜催化1，2，3三氮唑的形成。

The I-V behavior corresponding to different conformers is evaluated by the NEGF method.

使用NEGF方法模拟了二苯乙炔分子处于不同构象时的I-V特性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。