查询词典 hydrogen

Amine catalysts are used for preparation of thioamides by the addition reaction of nitriles with hydrogen sulfide.

在胺催化下，硫化氢和腈加成反应生成硫代酰胺，其原子经济性为100%，是一个绿色化学合成方法。

The results show that WO_3 can be nitrided in the mixture gas of hydrogen and nitrogen, and ...

结果表明，WO3可以在氢氮混合气中被还原氮化；氮化反应分两段进行；在氢氮体积比(4～5)∶1，反应温度650℃的条件下，WO3可以被还原为产物W2N；在不同氢氮比的混合气中氮化，WO3会生成不同的中间产物WO2和WOXNY，中间产物WOXNY进一步氮化生成W2N要比WO2容易；助剂Ni的加入使氮化反应温度降低了100℃；载体γ-Al2O3的加入使金属氧化物的氮化过程变为一步氮化还原反应。

She has to wash the affected ear with hydrogen peroxide and then apply some neomycin solution two or three times a day.

她必须用双氧水洗一下被感染的耳朵，然后每天涂两三次新霉素药水。

Visible above are red glowing emission nebulas of hydrogen, blue reflection nebulas of dust, dark absorption nebulas of dust, and the stars that formed from them.

上图所见，红色的部份是高温由氢组成的发射星云、蓝色的部份是尘埃造成的反射星云、而黑色的部份是尘埃所产生的吸收星云，恒星便是从中诞生。

White silk, wool fabric on the grass stains can be removed using hydrogen peroxide,.

白色丝绸、羊毛织物上的青草渍，用双氧水即可去除。

At higher temperatures (for example, 75℃), it is easier for water molecules to enter into wood cell wall, but at this moment the hydrogen bonding effect between water molecules and wood adsorption sites is very weak and also these molecules are in an inferior order even to that of liquid water molecules.

吸着过程中水分热力学量的分析结果表明，在水分吸着的初期阶段（吸湿开始后0～10小时），在较低温度条件下进入木材的一部分水分子附着在木材细胞腔表面，在较高温度条件下水分子直接进入木材细胞壁中。

The enterprises which are produced by hydrogen retreat furnace has been sold in Shanghai, Zhejiang, Jiangsu and many other stainless steel wire rod production enterprises.

本企业所生产的氢退炉已销售上海、浙江、江苏等多家不锈钢线材生产企业。

This beautiful telescopic view combines a composite color image with narrow band data that isolates light from hydrogen and oxygen atoms in the wind-blown nebula.

这张美丽的望远镜影像是一张色彩合成的窄波段数据影像，分离了这个星云内氢和氧原子发出的光。

The results show that the catalyst causes the re-form reaction of CH 4 and steam to take place at a lower temperature (200～500 ℃) and to generate part of hydrogen.

实验和计算结果都表明，该催化剂使重整反应能够在较低温度下(2 0 0～ 5 0 0℃)发生，产生少量 H2 。

The result shows that the elimination reaction and ring closing reaction are synergistic, and the hydrogen in the elimination reaction derives from hydroxyl. In addition, the activation energy of the reaction is 139.2kJ/mol.

计算结果表明，该反应中的消除反应和成环反应是协同进行的，溴化氢消除反应中的氢来自与O(22)相连的羟基氢，反应的活化势垒为139.2kJ/mol，反应放热25.1kJ/mol。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48