共价

Glycogen degradation and glycogen synthesis are controlled both by allosteric regulation and by hormonal control.

糖原分解及合成的主要酶是磷酸化酶及糖原合成酶，它们的活性是受磷酸化和去磷酸化的共价修饰调节及变构效应的调节。

"There are no practical natural sources of simple covalent amides, but the peptides and proteins in living systems are long chains with peptide bonds, which are amide linkages."

简单的有机共价醯胺没有实际的天然来源，然而生命系统中的和蛋白质都是些带键的长链，这些都是醯胺链接。

"There are no practical natural sources of simple covalent amides, but the peptides and proteins in living systems are long chains with peptide bonds, which are amide linkage s."

简单的有机共价醯胺没有实际的天然来源，然而生命系统中的和蛋白质都是些带键的长链，这些都是醯胺链接。

Commercially important covalent amides include several used as solvents; others are the sulfa drugs and nylon.

具有重要商业价值的共价醯胺中有若干种用作溶剂；其它的有磺胺药以及尼龙。

The structures of borates and borophosphates are primarily influenced by polyanions,and in borates M_xB_yA_z the number of coordination of B atoms increases with theelectronegativity of A atoms.

硼酸盐及硼磷酸盐的结构主要来自聚阴离子的影响，A代硼酸盐中，A的电负性越大，B的共价配位数越高。

The calculated results of present work show better agreement than those of the previous studies with the observed values. It can be found that the contributions to the EPR parameters from the ligand orbitals and spin-orbit coupling interactions cannot be neglected for the systems with significant covalency.

理论结果与实验符合得很好，且比前人的计算，尤其是g和A有明显的改进，说明对这类共价性较强的体系，配体轨道和旋轨耦合作用的贡献不能忽略。

This model is also extended to predict the structural changes in nc-GaN with different covalency from BaTiO3, which promises the universality of this model in covalent-ionic nanocrystals.

说明了该模型在共价-离子晶体纳米材料体系中的普适性。

The covalency for each bond obeys the following order:La-O＜Al(5)-O＜Al(1)-O＜Al(4)-O＜Al(2)-O＜Al(3)-O＜M-O.

晶体中各格位共价次序为：La-O＜Al(5)-O＜Al(1)-O＜Al(4)-O＜Al(2)-O＜Al(3)-O＜M-O。

These indicate that the covalency of bond that Nd〓 forms increases and the symmetry around Nd〓 lowers, which reflects the structural variations of silica gels.

这些表明了随着温度升高样品中Nd〓形成键的共价性增加，而且Nd〓周围的对称性降低，反映了硅胶结构的变化。

We note from the further studies that in the crystals, which sharing the similar crystal structures and coordinational environments, the magnitude of the Stokes shift of the luminescence of the dopant ion is in line with the average covalency of the replaced lattice site. This is because that the nature of Stokes shift is the energy transfer from the luminescent ion to the host lattice. The value of this energy is determined by the frequency of the host lattice in which the frequency is controlled by the chemical bond characters.

更深入的研究发现，在晶体结构和中心离子配位环境非常相似的系列晶体中，掺杂离子发射光的Stokes位移值与其所取代格位的平均共价性成正比的关系，这是由于Stokes位移的本质是发光离子在发光过程中向基质以光波辐射的形式传递能量，这一能量的大小是由基质的振动频率决定的，而基质的化学键性质恰恰决定着基质的振动频率。

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。