查询词典 covalent bond

This bonding may be hydrogen bonding but is preferably a salt bond and especially a covalent bond.

这可能是结合氢键，但最好是盐的债券，特别是共价键。

It is illustrated that the state of density in the Earth's interior layers and the result of their distinctness.As the depth increases,temperature and pressure will increase,the composition of metallic bond and covalent bond will increase.

探讨了地球内部各圈层物质的密度状态及其差异的原因，指出了随着深度的增加，即温度和压力的增加，共价键及金属键的键性有增加的趋势。

Covalent bond A chemical bond in which one or more pairs of electrons are shared between two atoms.

共价键：一般指两个原子接合时，通过形成共有电子对而产生的化学键。

After UV irradiation and the decomposition of diazium group, the linage of the films will be converted from ionic bond to covalent bond, result in the films could resist the etching of polar solvents and strong electrolyte.

利用传统的三电极光电转换装置，以0.5M KCl溶液为支持电解质，测试了含聚苯胺衍生物超薄膜的光电转换性能，并考察了影响光电流产生的影响因素。

Atom'.'' between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond.

负电'。''''。'原子'。''及其间的氢原子组成，其中一边是共价键，另一边是离子键。

By analyzing the results,a mixed bonding state is found to exist in CIS,which is a strong ionic bond with a much weaker covalent bond. The interactions between Cu and Se are much stronger than that between In and Se.

计算发现CIS中存在共价键，是一种非典型的离子型晶体，在整个晶体内存在共用电子对，Cu原子和Se原子的作用大于Se原子和In原子。

However, the thermal stability of metallic coordination polymer hardly enhanced in comparison with the polymer never coordinated transitional metallic ions. The reason might be that the energy of coordinate bond formed between metallic ion and polymer was trival in comparison with that of covalent bond in polymer. It started with coordinate bond when the coordinate polymer decomposed under high temperature, so it engendered little for the thermal stability at high temperature.

而金属配聚物较未配位金属的配体高温热稳定性提高不大，可能是由于金属离子与配体之间形成配位键的键能与配位体内的共价键键能相比要小得多，当金属配聚物受热裂解时，首先从配位键开始，因此对高温热稳定性的影响甚微。

Crystal lattice constants are close to other experiment results. Three kinds of chemical bonds exist among Mg and B atoms, between magnesium and boride is ionic bond and metallic bond is the predominant interaction in the layer formed by magnesium atoms. A strong covalent bond in the form of sp2 hybrid between boride atoms is the most important factors which can affect the transition temperature of MgB2. Population analysis clearly shows that electrons are transferred from Mg to B, as a result, the electron-phonon coupling in the layer of B is very strong.

规范保守赝势的计算结果表明，晶格常数与实验值误差在很小的范围内，分析了引起MgB2(001)面结构超导转变时电子浓度和偏态密度的变化情况，发现构成该超导体结构的成键有3种，着重从结构的电子浓度变化分析了其超导特性，六角蜂窝状结构中硼原子间相互作用为sp2杂化的共价键，镁原子和硼原子之间是离子键结合，镁原子层是金属键结合，镁原子的价电子部分转移到硼原子的pz轨道，部分电子为镁原子层共用。

Reversible covalent modification The activity of many enzymes is alterd by the reversible making and breaking of a covalent bond between the enzyme and a small nonprotein group.

可逆共价修饰许多酶的活性随酶和小的非蛋白质基团之间共价键可逆性的生成和断裂而改变。

On the other hand, in the ground state of NiSin(n=1-6) and Ni2Sin(n=1-6) clusters, electronic charges is transferred from Si-Si bond to Ni-Si bond, forming Ni-Si covalent bond, and the Mulliken overlap population of Ni-Si is positive, which I'orming bonding orbital and contribute to the stability of clusters.

另外，基态NiSi_n(n=1-6)团簇中，电荷从Si-Si键向Ni-Si键转移，形成Ni-Si共价键，Ni-Si重叠布局为正，为成键轨道，增强团簇的稳定性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。