共价键

Ca plays the role of connections between CoO2 and Ca2CoO3 layers, decrease ionic and covalent bond strength, and improving the thermoelectric property.

Ca连接了CoO2和Ca2CoO3层的相互作用，降低了Co-O共价键和离子键强度，改善了热电性能。

Under UV irradiation or heating the ionic bond of the complex converts to covalent bonds.

紫外光照或热处理可使其离子键转化为共价键。

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。

There are many factors that determine the ionic bond and covalent bond. What kind of chemical bond is formed between two atoms does not only have connections to the atom itself.It is related to the price attitude of the iton.

决定离子键、共价键的因素比较多，两原子之间形成哪种类型化学键不仅与原子本身性质有关，还与形成的化合物中离子的价态有关。

Under irradiation of UV light, PR-DR changes its crosslinking structure from ionic bond to covalent bond and becomes insoluble in DMF. This character can be used in practice as a photo-imaging material.

在紫外光照下，PR-DR的离子键将转化为共价键从而不溶于DMF，因而可用作光成像材料。

Covalent bond, ionic bond, metallic interaction and Van der Waals force. Different potentials can be constructed according to the different interactions. For different types of phenomena of some interaction, different potentials can also be constructed. So, a great variety of potentials can be found in literature.

可依据不同类型的相互作用如共价键、离子键、金属键和Van der Waals力等构建不同类型的原子间相互作用势，而且同一类型的相互作用也因所处理的性质或过程(如体积、表面、团簇、缺陷等)不同所采用的形式也不相同，这样就构建了大量的各种形式的原子间相互作用势。

The results show that the calculated cell parameters are in agreement with the experimental ones. The interactions between Li—N and Al—N are strong ionic bonds in Li3AlN2. The interaction between N and H is strong covalent bond and the interaction between Li and N is strong ionic bond in LiNH2. The calculated reaction enthalpies are 23.7 and 55.3 kJ/mol, respectively, which are in agreement with the experimental ones.

结果表明：Li3AlN2的Li—N、Al—N键主要为离子键，LiNH2的N—H键主要为共价键，Li—N键主要为离子键；298 K时贮氢反应的反应焓计算值分别为23.7和55.3 kJ/mol，与实验值均符合得较好；反应中各固态、气态物质的晶胞的结构优化后的晶格常数、键长与键角等与相应的实验值均符合较好。

In the present work, SDS-PAGE and light scattering method were used to evidence the 〓 and 〓 induced intramembrane aggregation of proteins. The aggregation was found mainly due to the binding of lanthanides to membrane proteins via noncovalent bonding.

本文用SDS-PAGE和光散射方法证明了由〓和〓可引起膜蛋白的聚集，这种聚集主要是由稀土离子以非共价键的与膜蛋白直接结合引起，也有少量以形成二硫键为特征的氧化性交联。

This implies that the atomic near neighbour distance of metallic bond solid solution is the closet to VCA model among the three solid solutions, although the vegard's law are not followed.

离子键固溶体中第一近邻距随成分的变化量只有近邻距Vegard定律变化量的40％左右，而共价键固溶体只有20％左右，金属键固溶体的变化量最大，一般都在50％以上，甚至高达80％左右。

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。

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。