共价的

In addition, the energy of s and p orbits of F2 or F3 ion is lower in the ferroelectric phase than in the cented symmetry phase and the covalence character of F1 ion whose contribution to the displacement is largest almost lose, which stabilize the structure of the ferroelectric system.

铁电相F2(F3)离子的能量低于中心对称相，最大位移贡献者F1的化学键性由弱共价作用到离子键的变化也是最大的，这均有利于体系的稳定。

Its bonding characterization and stability are discussed. The results show that these complexes are covalence complexes and that both the in-plane σ-bond and the in-plane π-bond in these complexes play an important role. The ESR spectra of VO -Ser system, VO -Ser-Phen system and VO -Ser-Bipy system in binary solvent glycol/water (V/V=1: 1) solution at various acidities (pH=1～14) have been observed at low temperature. It is found that in different pH ranges different structural complexes are formed.

测定了五种氨基酸席夫碱铜配合物的室温多晶粉末ESR谱、在不同溶剂中的室温及低温溶液ESR谱，确定配合物的配位环境；对室温溶液谱中观察到的二级效应和驰豫效应给予了理论解释、计算了驰豫参数；根据低温ESR波谱，计算了配合物的成键特性及稳定性，发现此类配合物为共价型配合物，平面内σ配键和平面内π配键均起重要作用。

The genome of infectious hepatitis B virus is a partially double stranded circular DNA, and that of replicative HBV is a covalently closed circular supercoiled DNA. The patients with chronic HBV infection manifest from non-active virus carrier state to severe active hepatitis, and 15%~25% of which will evolve decompensate cirrhosis and hepatocellular carcinoma.

感染型的乙型肝炎病毒基因组为部分双链环状DNA，复制型的HBV基因组共价闭合环状DNA慢性HBV感染的进展过程多变，从非活动性病毒携带到严重的活动性肝炎；其中约15%~25%的病人最终导致失代偿性肝硬化、肝细胞癌。

I. Design and selection of thc high affinity DNA ligands for singIe-chain reprcssorSingle-chain repressor RRn., is a derivative of bacteriophage 434 repressor,which contains covalent1y dimerized DNA-binding domains (axnino acids 1-69) of thephage 434 repressor.

一。设计和筛选单链阻遏蛋白的高亲和力DNA结合序列单链阻遏蛋白RR_是噬菌体434阻遏蛋白的衍生物，它是噬菌体434阻遏蛋白的N端DBD（1—69位氨基酸）组成的共价二聚体。

Silk is dyed with nine reactive dyes containing various reactive systems and having different reactive groups. After the dyeings being thoroughly extracted to remove all noncovalently bounded dyes,they are treated with buffer solutions in pH range from 1.89-10.65 at 70℃.

丝用九个含有不同活性基团和活性基个数的活性染料染色，着色丝上非共价结合的染料被萃取净后，用pH值从1.89至10.65五个不同缓冲溶液于70℃进行水解，吸附在丝上的水解染料再次被萃取净。

It makes a integral study of the Chinese verb "Chi" through two ways: isemantic descriptions — variable rules of meaning of V-N construction , referentical status of object-actant noun; iisyntactical descriptions — division and combination of actants or semantic valencies; positive and negative compatible proper.

具体通过语义和句法描写两大途径切入：i动宾构造的意义&变异规则&、题元名词的&指称&地位分析；ii题元或语义配价的裂变及合并、兼容共现特征和转换特征的分析。

The binding molecular mechanism of R,R-SA-Pt and DNA was investigated by 13CNMR and DNA viscosity titrations.

结果：发现环方铂是通过方酸根的离去与DNA碱基之间形成共价键而结合的，而环斑铂是通过嵌插到DNA碱基对之间以非共价方式与DNA结合的。

However, almost all applications are based on the covalently immobilized viologens due to their high water solubility and high poison.

但是，紫精的水溶性好和毒性大，所以几乎全部的应用都是基于共价固着的紫精。

AIM: To establish a simple and fast hepatitis B virus covalently closed circular DNA detecting method based on polymerase chain reaction with satisfactory sensitivity and specificity.

摘要目的：建立一种基于聚合酶链反应的简便快速、具有较高敏感性和特异性的检测乙型肝炎病毒共价闭合环状DNA的方法。

Phosphorylation and dephosphorylation of proteins are a ubiquitous and covalent modification in the living cells, and they are almost involved in all physiological and pathological processes, e.g., metabolisms, growth, development, carcinogenesis.

蛋白质的磷酸化与去磷酸化是细胞内普遍存在的一种共价修饰方式，它几乎涉及所有的生理及病理过程，如代谢、细胞的生长发育、癌变等。

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。