查询词典 the atom

The theoretical system for describing the structures of organic and drug molecules using 3 types of molecular electronegativity-distance is created based on various atomic types and atomic attributes. These MEDVs include MEDV-4 based on 4 atomic types and relative electronegativity and relative bond length to carbon atom, and molecular holographic distance vector based on 13 atomic types and relative bond length to carbon atom, and MEDV-13 based on 13 atomic types and atomic attributes and the modified electrotopological state index.

通过不同原子类型与原子属性划分方案，创建了3种形式的分子电性距离矢量即以4种原子类型划分方案和以碳原子为标准的相对电负性与相对键长为基础的分子电性距离矢量MEDV-4、以13种原子类型划分方案和相对键长为基础的全息分子距离矢量MHDV、以13种原子类型与43种原子属性划分方案以及修饰的电拓扑状态指数和拓扑距离为基础的分子电性距离矢量MEDV-13等3种矢量描述子表征分子结构的理论体系。

The empty p orbital and the occupied σorbital by a lone electron pair of carbene point towards H atom and C atom of the C—H bond respectively.

卡宾空的p轨道和占有一对孤电子的σ轨道分别指向C—H键的H原子和C原子。

All of these results confirmed that the quenching effect of sulfur atom. The distance between sulfur atom and chromophore played an important role in the self-quenching effect.

通过实验，进一步证实了硫原子对发光基团的荧光淬灭作用，说明二硫代酯与发光基团之间的距离对硫的荧光淬灭作用有很大的影响。

The most common examples are organic compounds, isomers of nitrite ester s in which a carbon atom is linked by a covalent bond to the nitro group's nitrogen atom.

最常见的例子是有机化合物，亚硝酸盐类的同分异构体，其中一个碳原子以共价键与硝基中的氮原子结合。

The most common examples are organic compounds, isomers of nitrite esters in which a carbon atom is linked by a covalent bond to the nitro group's nitrogen atom.

最常见的例子是有机化合物，亚硝酸盐类的同分异构体，其中一个碳原子以共价键与硝基中的氮原子结合。

Nitro derivatives of phenols, the pyrolysis initial reaction is an isomerization reaction It meansthe O-H bond in hydroxide rupture, then the Hydrogen atom transfer to the Oxygen atom in nitryl to form isomer.

苯酚的硝基衍生物的热解引发反应为异构化反应——酚羟基中的氢氧键断裂，氢原子迁移到邻位硝基(-NO_2)中的氧原子上，形成新的异构体化合物。

In a paramagnetic material the directions of the magnetic moments vary randomly from atom to atom.

在顺磁材料中，磁矩的方向在原子之间随意变化。

It is found that in this structure the molybdenum atom is coordinated by six sulfur atoms of three 1, 1 -dicynoethylene 2 ,2 -dithiolate(i-mnt2 -) ligands and a terminal oxygen atom, forming a distorted pentagonal bipyramidal structure.

结构分析结果说明Mo原子与三个配位基的六个硫原子和一个端基氧形成扭歪五角双锥结构。

In complex 2, the manganese ion is six-coordinated by two oxygen atoms and two nitrogen atoms from a quadridentate ligand Lb. as well as one oxygen atom from DMF and one cyanide nitrogen atom from [Fe3] (superscript -) in axial positions.

化合物2中，[Fe3]通过其中的1个氰基与桥联，其中Mn离子为六配位，分别和四齿配体Lb的2个氧原子和2个氮原子、DMF的1个氧原子及[Fe3]中的氰基氮原子配位。

A major class of tautomeric reactions involves exchange of a hydrogen atom between two other atom s in the same molecule, in both cases forming a covalent bond.

一类主要的互变异构反应是氢原子在两个其它原子间交换，与任何一方都生成共价键。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。