四价

At low HNO3 concentration and dilution factor above 2, 0.1 mol/L DCH18C6/1-octanol extracts very little americium,plutonium and uranium.The distribution ratios of Am、Pu and U increase with the increase of HNO3 concentration in aqueous phase,and decrease with increasing of dilution factor of HLLW.The distribution ratio of extraction of Pu increases with the increase of extractant concentration.

研究结果表明，在低硝酸浓度和较大稀释倍数情况下，DCH18C6对镅、钚、铀的萃取分配比都比较小，并随着水相硝酸浓度的增大而增大，随着模拟高放废液稀释倍数的增大而减小，提高萃取剂浓度会增大四价钚的萃取。

ELISA demonstrated that tetravalent antibody has gained in avidity compared with scFv and monoclonal antibody.

ELISA检测结果表明，四价抗体与单链抗体和单克隆抗体相比，具有更高的亲和力。

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"。

The inactivated tetravalent Riemerella anatipestifer vaccine which contained serotypes SCAU1, SCAU2, SCAU3, and SCAU4 chosen on the basis of epizootiology survey and employed propolis as adjuvant was prepared.

在流行病学调查的基础上，选择华南地区流行广泛的鸭疫里氏杆菌 SCAU1、SCAU2、SCAU3和SCAU4血清型菌株制备蜂胶佐剂四价灭活疫苗。

SDS-PAGE and Western Blot analyses showed that target protein was expressed mainly in the form of inclusion body.

经SDS-PAGE和Western Blot分析，四价抗体主要以不溶性的包涵体的形式表达。

The tetravalence vanadium was found in V2O5 gel thin films by measuring the electrical resistance change of V2O5 gel thin films with temperature, ESCA and X-ray diffraction analysis. in this paper, from miniamount redox in melting V2O5 and crystal structure, the influencing mechanism of miniamount redox on changing valence of vanadium was analyzed and discussed in detail.

通过对V2O5凝胶薄膜试样的电阻随温度的变化测试和电子能谱和X射线衍射分析发现V2O5凝胶薄膜中有四价钒的存在，本文从V2O5熔体的微量氧化还原和晶体结构的角度分析讨论了微量氧化还原影响钒离子价态变化的机理。

Having a valence of four; tetravalent.

四价的；四个原子价的

ChimeriVax has also been applied to development of Sanofi Pasteur's tetravalent dengue vaccine, which has successfully demonstrated proof-of-concept in a Phase 2 trial by generating 100% seroconversion to all four dengue virus serotypes.

ChimeriVax也适用于赛诺菲巴斯德的四价登革热疫苗，已成功地证明，证明在一个第二阶段试验的观念，产生100％转阴到所有四个血清型登革热病毒的发展。

Thus, SRB were likely to reduce sulfates to sulfides simultaneously with petroleum oxidization, and directly or indirectly reduce hexavalent uranium U to tetravalent uranium U to precipitate pitchblende.

于是，利用烃类作为生存的碳源，硫酸盐还原菌将硫酸盐还原的同时，直接或间接地把六价铀U还原成四价铀U，导致沥青铀矿形成。

Thus, the meiotic chromosome cofigurations showed that the tetraploids and hexaploids in C.reticulata allopolyploids, and the appearance of a few tetravalents in some populations might indicatehomology of chromosomes in different genomes to some extent.

根据减数分裂的构型，我们认为，四倍体和六倍体分别为异源四倍体和异源六倍体，少数四价体的存在表明染色体有部分同源性。

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。