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化物。

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

长石、枪晶石、二价金属硫化物、铈钙硅石是构成高炉渣的主要矿物。

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

有时交叉以从二价体末端处滑开，因此移端以降低交叉频率。

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。