英语释义

1. having a (specified) valence or valences
bivalent multivalent

2. having (so many) chromosomal strands or homologous chromosomes
univalent

3. having valence —usually used in combination
bivalent multivalent

片语

valent band个充满电子的低能价带

Christopher Valent标签

valent analysis价态分析

valent iron零价铁

Valent Marilyn名称

valent weight[化学]

valent impurity混合价杂质

Low Valent低价的

英汉例句

• the application of carbonyl reductive coupling reaction induced by low valent titanium as the crucial macrocyclization in the total syntheses of cembrane- type diterpenoids are reviewed.

  概述了低价钛诱导的羰基还原偶合反应作为环化关键步骤在西松烷型二萜天然产物全合成中的应用。

• analysis of the characteristics and mechanisms of chloric organic compound and heavy metal ion reduced by nano-scale zero valent iron are focused.

  重点分析了纳米零价铁还原含氯有机污染物和金属离子的特性和机理。

• the toxicity of chromium in different valent are quite different.

  不同价态的铬具有不同的毒性。

• it was revealed that the formation of cerium conversion coatings involves a chemical dissolution process of anodized film and an electroreduction process of 4 valent state cerium compound.

  研究结果表明铈转化膜的生成包括阳极氧化膜的化学溶解和4价铈化合物的电化学还原两个过程；

• part 1: progress in piancol coupling of aldehydes and ketones using low valent titanium is reviewed in recent years.

  第1 章：低价钛还原偶联醛酮合成片吶醇的进展。

• the mechanisms of chromium removal by zero valent iron and the effects of the anions were also depicted.

  初步探讨了零价铁除铬和小分子阴离子对铬去除影响的机理。

• pinacol coupling reaction induced by low valent titanium has higher chemoselectivity and stereoselectivity, and has increasing attracted organic chemists in recent years.

  由低价钛络合物诱发的片吶醇偶联反应，具有良好的化学选择性和立体选择性，近几年来又引起有机化学家们的极大兴趣与重视。

• this paper reviews the deoxygenative reduction and dehalogenative reduction of organic compounds with the low valent tungsten reagents.

  本文对低价钨试剂与有机化合物的脱氧、脱卤还原反应作了简要的叙述。

• progress in pinacol coupling of aldehydes and ketones using low valent titanium is reviewed in recent years.

  文章综述近几年来由低价钛还原偶联醛酮合成片吶醇的进展。

• this is also the development direction of zero valent iron applied to wastewater treatment fields in the future.

  故该领域需要更多学者的研究以使零价铁在污水处理领域发挥更大的作用。