bivalent

A compound derived from ammonia and containing the bivalent NH group combined with a bivalent nonacid group.

在分析中用作钯或镍的沉淀剂的合。

The practice showed that the blast furnace slags mainly consisted of melilite,cuspidine,bivalent metallic sulphide and Ce-Ca silica.

结表明:黄长石、枪晶石、二价金属硫、铈钙硅石是构成高炉渣的主。

Terminalization The movement of chiasmata to the end of the bivalent arms, a process that may occur during late prophase I of meiosis.

交叉)移端：发生在第一次减数分裂后期，染色体交叉向二价体染色体臂的末端移动的过程。

The chiasmata can slip off the ends of the bivalents, and thus chiasma frequency may be reduced by terminalization.

有时交叉可以从二价体末端处滑开，因此移端过程可以降低交叉频率。