共价键

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。

Sc. I am interested in the covalent modification of carbon nanotubes and atom transfer radical polymerization ATRP on the nanoscale materials surface.

2005年毕业于曲阜师范大学，目前主要研究方向是碳纳米管的共价键修饰和纳米尺度的原子转移自由基聚合。

Alkenes have one or more double bonds between carbon atoms, where two pairs of electrons are shared.

链烯有一个或多个共价键，即碳原子分享两对电子。

Alkynes have one or more triple bonds, the carbon atoms sharing three pairs of electrons.

链炔有一个或超过三个共价键，即碳原子享有三对电子。

As a sugar molecule contains polyhydroxyl groups, one can use an appropriate receptor to catch the sugar molecular via hydrogen bondings or covalent interactions.

中文摘要醣在细胞的辨识方面扮演很重要的角色，所以有钗h需要研究其分子辨识的方法；醣含有钗h的羟基，因此可以用含氢键，或是含有可以用共价键键结的受体去辨识。

The ligands donate the lone pair electrons to the central metal to form the covalent bondings, called coordination bondings.

配体提供原子对与金属原子形成的共价键称为配位键。

X=0, 11, 22, 33, 44, and 55 borophosphate glasses series have investigated, and it is found that:(1) both the covalency bonding between Yb〓 ion and oxygen ion and the asymmetry in local structures surrounding Yb〓 ion have strong effects on integrated absorption cross section ∑〓 and emission cross section σ〓 of Yb〓 ion in borophosphate glasses;(2) the borophosphate glasses and borate glasses appear superior as Yb-gain media to the phosphate glasses, although the phosphate glasses have been demonstrated as the most appropriate Ndgain media.

在第二章中，我们对〓（x=0，11，22，33，44，和55）系列的掺Yb〓硼磷酸盐玻璃的吸收光谱和发射光谱特性进行了研究，结果表明：（1）在硼磷酸盐玻璃中，Yb-O键的共价键成分和Yb〓离子周围的近邻结构的对称性两个因素对积分吸收截面∑〓和受激发射截面σ〓的影响都很大；（2）尽管磷酸盐玻璃是最合适的掺钕激光增益基质，但是作为掺镱的激光增益基质，硼磷酸盐玻璃和硼酸盐玻璃都要优于磷酸盐玻璃。

A few covalently bonded C〓 dimers and trimers in the adlayer were observed, which is consistent with the experimental observations.

表面上的C〓沉积层保持着局域有序的结构，观察到了共价键结合的二聚体和三聚体，与实验观察结果相符合。

The photosynthetic model compounds include dyads, compounds more than two segments and non-covalently linked supramolecular systems.

光合作用模型化合物包括二元化合物、多元化合物和非共价键相连的超分子体系，超分子体系的光化学和光物理是近几年该领域的研究热点。

Therefore, the pre-fabricated functional surface containing azide groups can be covalently anchored through click-chemistry by newly designed acetylene-appended HBCs. These HBC derivatives not only possess the potential in the formation of SAM, but their alignment modes of edge-on or face-on could be controlled by tailor-made molecular design.

因此，我们设计出末端带有乙炔官能基之HBC分子，希望在预先处理并带有叠氮(-N3)官能基的基板表面上进行click-chemistry (速配组合式化学、点击化学)，利用共价键之形式将HBC分子镶嵌於基板表面，除了藉此制作出分子自组装单层薄膜之外，利用分子设计进一步控制其排列方式为edge-on或是face-on。

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。