Determination of Diene Value in Cracking Gasoline by Infrared Transmission Spectrophotometry

The values measured by IR coincided with those of the reference method ( UOP326-65). The new method has advantages of better repeatability, facility and short analysis time, and it is suitable especially for control analysis of diene value in processing of gasoline.

实验结果表明，该方法测量结果与参考方法（UOP326-65）测量结果之间无显著性差异，具有更好的重复性，操作方便且分析速度快，特别适用于油品生产过程中二烯值的控制分析。

Combined with stoichiometric method, the diene value in cracking gasoline was determined by Fourier Transform Infrared Spectroscopy at selected wavenumber region.

用傅里叶红外光谱仪，在选定的波数范围内，采用化学计量学法测量乙烯裂解汽油的二烯值。

Men who die by their own hand consequently follow to its conclusion their emotional inclination.

因此,用双手埋葬自己的人们必执着地跟随他们的情感走到了最后.

More die by food than by famine.

饱食死者多于饥饿.

The wind will die by evening.

风在傍晚前会停息.

Jimushi will die by my blade. This, I swear.

地虫,将会死在我刀下, 这个, 我发誓.

All who draw the sword will die by the sword.

凡动刀的;必死在刀下.

They will die the death.

他们将被处死.

Inefficient companies are likely to die the death in the near future.

效率低的公司很可能在不久的将来关门大吉.

STUDIES ON THE WITTIG REACTION(ⅰ) The Stereochemistry of 1, 3,-diene Synthesis

维惕希（Wittig）反应的研究（Ⅰ）1,3二烯合成的立体化学

The electrical properties of, and in the resistivity, dielectric constant are control at the proper level.

电性能, 又如电阻率 、 介电常数等均应控制在适当水平.

To satisfy these requirements, high dielectric constant composites attract more and more attentions.

这就要求人们不断研究和制备高介电常数复合材料.

The dielectric constant and thermal expansion coefficient of samples increase with the increase of ZnO content.

样品的介电常数和膨胀系数随着氧化锌的增加而增加.

Dielectric constant of materials depended on dipole polarization, electron polarization and atom polarization inner materials.

介电常数取决于改性材料内部的偶极极化 、 电子极化和原子极化.

Computer to use shielded cable, use a small dielectric constant, high-pressure polyethylene for insulation.

电子计算机用屏蔽电缆, 选用介电常数小的高压聚乙烯作绝缘.

With the increasing content of silica, the absorption reduced and the dielectric constant is not variable.

随着二氧化硅含量的增加, 薄膜的吸水率降低,介电常数基本不变.

Excessive sintering aids could lead to glass state material separating out and dielectric constant decreasing.

过量的助烧剂会导致玻璃态物质析出并使介电常数减小.

PCIP can only exist dielectric with smaller state dielectric constant ε0.

界面极化子只能存在于静态介电常数较小的一侧.

Considering these difficulties, the author develops a new type dielectric loss tangent tester for capacitive-type equipment.

本文针对以上技术难点, 研制了一种新型 电容型 电气设备介质损耗测试仪.

PbO deficiency only affected dielectric loss very weakly.

而铅欠缺对介电损耗影响很小.