共价的

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。

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

变构控制和共价修饰磷酸化酶存在有磷酸化的活性 a 型河渠磷酸化的正常情况下无活性的 b 型。

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。

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。

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。

The lower energy is because that the chemical bond between O〓 and M〓 has not formed completely, which cause by the higher covalency of Eu〓-O〓 bond in amorphous state. And the larger half width is caused by the disorder of sites.

这是由于在非晶态状态下金属氧键尚未完全形成，从而导致Eu〓-O〓的共价性较高，因此电荷迁移带处于较低的能量位置；而格位的无序性导致其光谱变宽。

Mossbauer isomer shifts of Fe2+ ion in LaFeAl11O19 and Eu3+ ion in LaMgAl11O19 are calculated by using the chemical surrounding facter,h,definited by covalency and electronic polarizability,and the results are in agreement with the experimental values.

利用由共价性和极化率定义的化学环境因子h计算了LaFeAl11O19中57Fe的穆斯堡尔同质异能位移和LaMgAl11O19∶Eu中151Eu的同质异能位移，所得结果与实验值一致。

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。