查询词典 covalent bond

The results show that the covalent electron number and bond energy in structure cells can be improved by adding proper alloy elements and carbon in α-Fe matrix, thus the matrix can be strengthened.

结果表明，在α-Fe基体中加入适量的合金元素和C，可提高结构单元的共价电子数n和键能E，强化了基体。

Peptide bond: A covalent linkage formed between the α-carboxyl group of one amino acid and the α- amino group of another.

肽键是由一个氨基酸的α-羧基与另一个氨基酸的α-氨基脱水缩合而形成的化学键。

This kind of halogen bond is between covalent and ionic interactions, with the static interaction being dominant.

复合物体系中的卤键介于共价键与离子键之间，偏于静电作用成分为主。

The partial covalent nature of hydrogen bond predicted by

氢键的类电价性质由

Calculated band structure,and state density shows that the compound is metallic. However,there is an apparent covalent feature of the Ti-H bond.

计算得到的能带结构和态密度表明该化合物具有金属性的特点，但是Ti—H键有明显的共价键特征。

The interaction of DAB and RB with SPM and the cells are exothermal and idiopathic, which contained the union of non-covalent bonds, such as electrostatic bond, hydrogen bond and van der Waals force. Moreover, most of DAB and RB were accumulated on the excellular membrane and walls, to hardly enter the cytoplasm.

结果表明， DAB， RB与SPM和细胞外膜有强烈的单分子层化学吸附，是自发的放热反应，主要通过电荷对吸引、氢键等非共价键结合在SPM和细胞外表面，且绝大部分DAB， RB积累、滞留在细胞膜壁上。

Results indicate that non-covalent bonds, including hydrogen bond and hydrophobic reaction contribute most to the coagulating reaction, while ionic bond and disulfide bond have little effect on the coagulating process.

结果发现凝固过程中的分子间作用力主要是氢键和疏水作用，而离子键和二硫键对凝固过程影响不大。

The bonding energy of the mixed covalent/metallic Ti-Al bond for the Ti-terminated Al/TiB_2 interface is larger than that of the polar covalent Al-B bond with partial ionic-like feature for the B-terminated interface. Metallic bond between Al atoms forms across the Al/AlB_2 interface, which results in weaker interfacial adhesion than that for the Al/TiB_2 interface. The interfacial energy for Al/TiB_2 depends on the interfacial chemical potential.

Al熔体中仅存在TiB_2粒子，而无多余溶质Ti时，α-Al在TiB_2粒子上异质形核产生的Al/TiB_2界面能大于α-Al从Al熔体中直接形核时的液-固界面能，不满足TiB_2粒子充当α-Al有效异质形核核心的能量条件，这从理论上解释了Al熔体内仅存在TiB_2粒子时无晶粒细化效果的实验现象。

The specific inhibitor of DNA methylation that is available currently is 5-Aza-2'-deoxycytidine (5Aza-dc), which forms a covalent bond with the DNA methyltransferase, thus, limiting the number of free DMT molecules for methylating DNA and then decreasing its biology activity.

目前研究较多的甲基化抑制剂是胞苷类似物5-氮杂-2'-脱氧胞苷(5-Aza-2'-deoxycytidine， 5Aza-dc)。5Aza-dc的作用机制是与DNA甲基转移酶共价结合，降低酶的生物活性。

It shows that with the content increase of modified nano-silica in the butyl rubber, the portions of covalent bond interaction increases, overall crosslink density of vulcanizes increases, chemistry crosslink density of vulcanizes increases and reaches its maximum when the content is 2.0%, then followed by a slow decrease.

研究了纳米二氧化硅用量对硫化胶力学性能的影响，随着纳米二氧化硅填充量的增加，结合橡胶中共价键作用的贡献增加，硫化胶总交联密度增加，化学交联密度在填充量2.0%时增至最大然后缓慢降低。

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。