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. 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。
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. 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。
Water molecule is polar molecule, and electric dipole interaction exiting among water molecules leads to water group configuration which is a dynamic combination by hydrogen chemical bond, Water molecule will bring tropism polarity in the microwave field. 水分子是极性分子,水分子之间存在的电偶极相互作用,使它们以氢键的形式相互偶联在一起,形成水的团簇结构,且这种结构是一种动态结合。
The reasons that fluorescence spectrum of coumarin 1 is very sensitive to environmental polar change were discussed based on solvent solute molecule hydrogen bond and its effects on formation of nonradiative twisted intramolecular charge transfer ( TICT) state for the fluorescence probe. 通过溶剂-溶质分子间氢键作用及对其非荧光性的TICT态形成的影响,讨论了这种荧光探针的荧光光谱对环境极性非常敏感的原因。
When the polar group and the length of alkyl chain remain the same, the compound with a double bond in the alkyl chain showed the better permeation enhancement factor. 当极性基团和侧链长度相同时,长碳链中含不饱和双键的化合物促渗性能较好。