二价的

In this synthetic system, the central metal coordinated withSchiff base and chiral diol simultaneously, and a "mix-ligands complex" type chiral synthonformed.

在该合成体系中，四价的中心金属同时与氨基酸酯Schiff碱和手性二醇配位，形成了一个"手性合成子"。

Activity of PncA protein is influenced by EDTA or divalent metal ion.

PncA蛋白也会受到EDTA及二价金属离子的影响。

Furthermore, it was discussed for the method of normalization by AVS in predicting chemical activity and bioavailability of divalent metal.

探讨了应用AVS归一化沉积物中二价有毒金属评价其化学活性和生物可用性的可能性。

Divalent cations,such as Ca2+ and Pb2+ could reduced the biosorption of radiocesium by D.radiodurans.

二价阳离子，如Ca2+和Pb2+也能降低耐辐射奇球菌对放射性铯的吸收。

Magnesium( Mg2+) is the most abundant divalent cation in plant cells and plays a critical role in many physiological processes in plants.

摘 要：Mg2+是植物细胞中含量最丰富的二价阳离子，在植物体内起重要作用。

We have developed a technique of random-primed tritium labeled DNA extension on the pachytene bivalents of rice-field eels.

采用随机引物，在黄鳝二价体上建立了氚标记引物原位DNA合成技术，并详细探索了该技术的实验条件。

In this paper, the nanometer Co-Cu-B alloy powders had been prepared in solution of mixing cupric and cobaltous sulphate, by liquid reduction process, on the condition of pure water and the ethanol-water system, using KBH4 as a reducer, PVP as a dispersant.

本研究采用液相还原法，以KBH4作还原剂，PVP作分散剂，分别在二价钴、铜硫酸盐的纯水体系和乙醇-水体系下合成了纳米Co-Cu-B合金粉末。

Complete desynapsis found in rice so far.

以及单位细胞的二价体频率，确定该联会消失变异为完全联会消失变异。

Soil Ca2+ content increased by 0.749mmol/kg, Mg2+ content increased by 0.169mmol/kg, the Na++ K+ content dropped by 9.52mmol?kg, SO42- increased by 0.091mmol?kg, Cl- reduced by 1.727mmol?kg, the HCO3- content in the soil assumed the obvious dropping tendency, it might be explained that the advancement of HCO3- has transformed into CO32- in the oasis, and has formed precipitation with two price calcium magnesium heteropolar ,then fix in the soil layer.

4土壤Ca2+含量增加了0.749mmol/kg，Mg2+含量增加了0.169mmol/kg ，Na++K+含量下降了9.52 mmol∕kg，SO42-增加了0.091 mmol∕kg， Cl-降低了1.727 mmol∕kg，土壤中HCO3-的含量呈明显下降趋势，可解释为在绿洲化进程中HCO3-转化为CO32-，并与二价钙镁离子结合形成沉淀固定于土层中。

Results show that the adoption of stainless steel anode wrapped with anion membrane improves the bath stability and avoids the oxidation of manganous ions.

结果表明：采用不锈钢阳极和阴离子膜可提高镀液稳定性，防止二价锰被氧化，加入氢氧化钡可消除因补充锌锰离子而积累的硫酸根离子。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。