价

Periodic law also directs the element and its compounds on the nature of the system, the structure of the modern theory of the material basis for the development of several aspects of the work, to develop into the valence bond theory chemical bonding, molecular orbital theory and ligand field theory.

周期律还指导了对元素及其化合物性质的系统研究，成为现代物质结构理论发展的基础经过几方面的工作，发展成为化学键的价键理论、分子轨道理论和配位场理论。

He says, new round of periodic change element is very much, shipping transport power is supplied, dock is managed, wave motion of boat price change, freight.

他说，新一轮周期的变化因素很多，船舶运力供给、码头经营、船价变化、运费波动等。

Electron Beam Ion Trap uses highly compressed electron beam to ionize ions and atoms to produces highly charged ions. lonization stages of almost any element in the Periodic Table can be produced and trapped for several hours in the EBIT.

电子束离子阱用磁场中高度压缩的高能电子束来电离离子以获得高价态离子，它可以产生元素周期表中任何元素任何价态的离子，并且能够在EBIT中的强磁场和静电势阱中约束足够长的时间。

Metallic properties increase from lighter to heavier elements in each vertical group of the periodic table and from right to left in each row.

在元素周期表中，每一个垂直以及从右至左的表格中的金属元素的价由低向高呈上升趋势。

Besides that, the use of soil is manifold and the permissibility of soil to Cr and Cr^6 ＋ is different too.

各种地质条件形成的土壤含铬量相差很大，而土地的用途有很多种，对总铬和＋6价铬的容忍性各不相同，故尚未见到铬污染土壤治理标准。

These ingredients includes epidermal growth factor, hepatocyte growth factor, dimethyl sulfoxide, phenobarbital sodium and all trans-retinoic acid. We isolate and culture primary 10-weeks-old human fetal hepatocytes, observe hepatocytes form and its function markers. Inoculate hepatocytes with HBV Dane particles to observe if HBV susceptibility of fetal hepatocytes can be induced in vitro. To detect HBV covalently closed circular DNA within hepatocytes, we improve the existent PCR method.

基于上述假设，我们设计了10种培养条件，在自行设计的无血清培养基中添加不同的细胞分化诱导物，包括表皮生长因子、肝细胞生长因子、二甲基亚砜、苯巴比妥钠、全反式维甲酸等，分离孕10周龄人胎肝细胞进行原代培养，观测肝细胞形态及功能指标变化，并定时给予HBV感染，观察能否在体外诱导胎肝细胞出现HBV易感性；为检测肝细胞内HBV共价闭合环状DNA(covalently closed circular DNA，cccDNA)，我们改进了现有的PCR检测法。

The stronger and more coordinate bonds between anionic phenolate groups and Fe ions in higher oxidation state prevented the dissociation of central ions.

这些基团的引入提高了中心金属Fe的价态，并增加了配体的电子云密度从而调节了Fe的氧化还原电位。

However, it is hard to prepare high valent Mn complexes with ligand with only neutral chelating nitrogen atom of two dpa arms in 〓. In order to get a Mn dimmer complex with high oxidation states of manganese to increase the possibility of storing more oxidizing equivalents necessary to oxidize water evolving oxygen, some N atoms are replaced by anionic phenolate groups.

本文以高价金属的稳定、氧化还原性能的改善、各金属离子之间联系的增强等作为主要研究内容，来改进以往模型中金属价态较低，氧化还原电位高，不利于形成氧化活性中间体；多核配合物的研究较少，且各金属活性中心相互协同作用弱等问题。

Several trivalent (boron, aluminium, iron, arsenic and antimony) and tetravalent metal/non-metal derivatives of N-(2-methyl) phenylglycine have been prepared by the interaction of their corresponding isopropoxide with the latter in 1:1 and 1:2 molar ratios in benzene medium.

用N-(2-甲基)苯基甘氨酸合成了几种及四价金属/非金属衍生物。

The adsorption properties of the function fiber in solution for transition metal ion such as Zn2+,Cd2+,Hg2+etc., were studied and the effects of temperature, concentration, pHon adsorption were also determined. The results showed that the fiber exhibited fairly good adsorption properties, and the adsorption capacities for Zn2+.Cd2+,Hg2+ were up to 196.79mg/g, 275.40mg/g and 6,84.01mg/g respectively.

又研究了该纤维材料在水溶液中对Zn2+、Cd2+、Hg2+等过渡金属离子的吸附性能，测定了温度、起始浓度、PH对吸附性能的影响，结果表明该功能纤维对部分过渡金属二价离子有良好的吸附，对zn2+、Cd2+、Hg2+的吸附量分别为196.79mmg／g、275.40rmmg／g、684.01mmg／g。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。