极性键

这表示棉酚很可能以共轭平面平行地插入到DNA分子双螺旋结构的碱基片层之间，与其中的胸腺嘧啶碱基以弱相互作用的极性键形成复合物。

It is probably that the conjugated plane of gossypol is inserted into the base pair pleated sheet of the DNA double helical structure to associate with thymine through weak polar bond .

Ln-Cp间的键是以离子性为主的极性键。

The bonds of Ln-Cp are polar bondings which have ionic , character in the main .

空间对称的极性键分布，还是会导致整个分子为非极性分子。

Symmetric disposition of polar bonds still results in a nonpolar molecule .

所有5个价键都是普通的非极性键。

All five valences are the ordinary , nonpolar ones .

它应该告诉了你，首先，这是一根极性键。

It tells you that , first of all , there is polarity here .

这是四个极性键，按空间对称聚集的结果。

It is an aggregate of four polar bonds , but they are symmetry arranged in space .

甲烷就是一个很好的例子，因为极性键是，空间对称的。

A good example of that is CH4 , because the CH bond is polar but symmetrically disposed in space .

结果表明，铝合金经三乙二醇二甲醚低温微波等离子体改性后，表面得到一层均匀、致密的涂层，其化学组成为类聚乙二醇结构，表面主要聚集有大量的碳氢和碳氧极性键；

Results demonstrate that the modified coating on the aluminum alloy is uniform and closed , which composed of PEG - like structures with carbon-hydrogen and carbon-oxygen polarity linkages on the surface mainly .

大气条件下退火的薄膜样品以类SiO2结构为主，强极性Si-OH键的生成和薄膜的剧烈收缩导致介电常数的上升。

The film annealed in air is similar to silicon dioxide in structure . The appearance of polar bond Si-OH and the shrinkage of film cause the increase of dielectric constant .

键长、键的极性于键能间的关系

The relationship among bond length , polarity and bond energy

两个原子对共用电子对具有相同的引力时，则形成非极性共价键。

A nonpolar covalent bond happens when both atoms have the same strength of electric attraction for the shared electrons .

结果表明有高介电常数、低粘度、分子中甲基基团直接与极性基团键合的有机液体是合适的沉积碳源；

The results show that the organic liquids with high dielectric constants , small viscosities and the methyl group bonding to the polar group are appropriate carbon sources .

该模型可以描述纯共价化学键、极性共价键与离子键的键强，并且可用于估算某些晶体材料沿特定方向的抗拉强度。

This model can describe the bond strength of pure covalent , polar covalent and ionic bonds , and can predict the tensile strength of some crystals along specific directions .

较高极性的脲键给聚合物提供了较强的氢键和较好的热稳定性，并使这些聚合物在橡胶平台区有较高和变化较小的动态剪切模量。

The highly polar urea linkage offers stronger hydrogen bonding and higher thermal stability to the polymers , which introduces higher and flatter shear modulus the rubbery plateau .

环氧树脂结构中含有独特的环氧基，以及极性羟基、醚键等活性基团，因而具有许多优异的性能，广泛应用于机械、电子、航空航天、涂料等领域。

Epoxy compounds containing a unique epoxy group , polar hydroxyl and ether active groups , which has many excellent properties , It is widely used in different fields ( machinery , electronics , aeronautics , coating ) .

第二种构成，需要空间非极性，就是需要极性键的空间对称分布。

The second way to have something that is net nonpolar is to have spatially symmetric disposition of polar bonds .