查询词典 hydrogen

The compound catalyst is added with a cocatalyst ingredient, hydrogen tungsten gunmetal or hydrogen molybdenum gunmetal on the basis of a normal carbon platinum-carried compound catalyst.

该催化剂在一般碳载铂催化剂的基础上添加了助催化成分氢钨青铜或氢钼青铜。

Particularly in theβsubunit, the rotation of the distal HisE7 (63) imidazole ring about the Cα-Cγ bond and its large distance from the haem plane make a hydrogen bond possible between E7 Nε and the terminal binding oxygen atom, while in human oxyHb this hydrogen bond either does not exist or is only very weak.

这个氢键在人oxyHb分子中要么不存在要么很弱。

Not only the hydrogen atom of hydroxyl but also the hydrogen atom of the methyl group can transfer to the N atom of heterocycle.

不但甲醇分子羟基上的H可以作为供体质子，而且甲基上的H也可以作为供体质子而转移到芳香环的杂原子N上。

The effect of heterocycle in the molecules was similar to that of group -NH2, but the hydrogen on the nitrogen atoms could form the hydrogen bond between molecules which could effectively improve the thermal stability.

对于二维电荷转移体系，我们研究了氧桥Λ型分子，它含有两个D-π-A轴，属于典型的二维电荷转移体系，且它们的β_／β_＜1。

Hydrocyanic acid and water proceed via a five-centred transition states then transformed by its exterior hydrogen-bond; The results show that the activation energy of the isomerizing reaction in the aqueous phase is lower than that in the gas phase. It is likely that the hydrogen bonds formed in the complexes and the solvent effect play an important role.

计算结果表明，在水相中异构化过程的活化能比在气相中低，无论在气相还是在水相中异氢氰酸通过水氢键转化成氢氰酸容易些，而氢氰酸由水氢键转化成异氢氰酸相对要困难些，分子间氢键和溶剂化效应在异构化反应过程中起到重要的作用。

This combination of uranium and hydrogen is called a " hydrogen bomb ".

这种铀和氢的结合，叫做"氢弹"。

Reducing agent and to supply a reducing atmosphere; to make hydrogen chloride and hydrogen Bromide; and in

氢气主要用于氨、乙醇、苯胺和甲醇的合成；石油燃料的脱硫；也是一种还原剂和补充减少中的大气；制备氯化氢和溴化氢；还用于有机化合物的氢化。

"It is used to synthesize ammonia, ethanol, aniline, and methanol; to treat petroleum fuels; as a reducing agent and to supply a reducing atmosphere; to make hydrogen chloride and hydrogen Bromide; and in hydrogenation (e.g., of fats)."

氢气主要用于氨、乙醇、苯胺和甲醇的合成；石油燃料的脱硫；也是一种还原剂和补充减少中的大气；制备氯化氢和溴化氢；还用于有机化合物的氢化。

" It is used to synthesize ammonia, ethanol, aniline, and methanol; to treat petroleum fuels; as a reducing agent and to supply a reducing atmosphere; to make hydrogen chloride and hydrogen bromide; and in hydrogenation (e.g., of fat s)."

氢气主要用于氨、乙醇、苯胺和甲醇的合成；石油燃料的脱硫；也是一种还原剂和补充减少中的大气；制备氯化氢和溴化氢；还用于有机化合物的氢化。

We successfully improved the methods of departing O-methyl using boron tribromide, of isolating hydrogen bromide byα-chloro-ethyl chloroformate, and of related in synthesis of natrexone, new medicine, using boron tribromide. This resulted in generation of hydrogen cyanide becoming impossible.

改进了以氯甲酸-α-氯乙酯脱代替溴化氰以及改进的三溴化硼法作为新药纳曲酮合成中相应的方法，去除了合成过程中产生氰化氢气体的可能性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。