查询词典 trivalent

Results showed that the PMC meiosis of autotetraploid was similar to the diploid except some particularities. In metaphase Ⅰ, multivalent, quadrivalent, trivalent, bivalent and univalent were observed and some of the chromosomes were found not to rank on the metaphase plate and so did in metaphase Ⅱ cells. In anaphase Ⅰ and anaphase Ⅱ cells, there were lagging chromosomes, chromosome bridge and fragment. During anaphase Ⅱ and telophase Ⅱ, chromosome segregation was not synchronous or equal. At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

结果表明，同源四倍体花粉母细胞减数分裂过程与二倍体相比，中期Ⅰ染色体构型复杂，有多价体、四价体、三价体、二价体和单价体；中期Ⅰ及中期Ⅱ有部分染色体没有排列在赤道板上；后期Ⅰ及后期Ⅱ出现落后染色体、染色体桥及断片；后期Ⅱ和末期Ⅱ有染色体不同步分离及不等分裂的现象；四分体时期还出现二分体、三分体、含微核的异常四分体及多分体。

A white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite.

一种白色三价金属元素，有时归为稀土属，见于斯堪的纳维亚钪钇石中。

One means of accomplishing this end is to add trivalent cations to the water.

实现这一目的的一种方法是将三价阳离子加入水中。

Chromium in its trivalent form is known to be an essential trace element to our body.

铬是动物和人体内必需的微量元素，在体液中主要以三价态存在。

The mechanisms and prospect of trivalent chromium plating were introduced. And some problems that should be deeply studied were pointed out.

还介绍了三价铬电镀的机理及展望，并提出了有待深入研究的问题。

Abstract］ Objective To discuss the safety and immunogenicity of trivalent split influenza virus vaccine.

目的 探讨流行性感冒病毒裂解疫苗的临床安全性与免疫效果。

She explains that health workers have been using what are called trivalent vaccines in some places.

她解释说保健人员在一些地区已经使用称之为三价疫苗。

The trivalent chromium plating has been proposed for a long time.

实际上提出用三价铬代替六价铬的研究已经有很长时间。

The ability of HBMPPT-S-Toluene-HNO〓 system to extract lanthinideelements was much lower than its ability to extract trivalent Am.

该体系对各镧系元素之间也有一定的分离效果，但相邻镧系元素间的分离系数较小。

Chromium is widely distributed in nature, organisms mainly trivalent form of chromium.

铬在自然界中广泛分布，生物体中主要以三价铬的形式存在。

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。