氢的

A large number of bond-type complexes, as long as the hydrogen of the molecules covalently coupled to the molecular approach in an electronegative atom up, that constitutes a hydrogen bond, there are intramolecular hydrogen bonds and intermolecular hydrogen bonds of the points, will affect the formation of complex reaction carried out, such as in solution adding dioxa cyclohexane, or tetrahydrofuran, will reduce the alkylation reaction rate.

氢键型络合物为数众多，只要含氢的分子以共价键方式耦合到分子中一个电负性原子上去，即构成氢键，有分子内氢键和分子间氢键之分，络合物的形成将会影响反应的进行，如在溶液中加入二氧杂环己烷或四氢呋喃，都会降低烷基化反应速率。

Hydrogenases are key enzyme for bio-hydrogen production, most of them were rapidly inactivated by oxygen. It is important to bio-hydrogen production and hydrogen application that improve the O2-tolerance of hydrogenase.

氢酶是生物制氢的关键酶，大多数氢酶因对氧极敏感而易失活，因此提高氢酶的氧耐受性对生物制氢有重要意义。

H2 production by reversible hydrogenase in green alga e is a perfect approach of H2 production by photo-hydrolysis through solar energy.

绿藻可逆性氢酶制氢是太阳能光解水制氢的理想途径。

The substance which gives up hydrogen is said to be oxidized and the one which accepts the hydrogen is sais to be reduced.

释出氢的物质是氧化物，吸收氢的物质减少了。如果化学学的认真点就不是这样了。一个物质失去氢叫做被氧化，一个物质得到氢叫做被还原。

A set of in situ infrared apparatus which can beoperated at liquid nitrogen temperature is established. The structuralstudies of polyhydride of Ruthenium is carried out from roomtemperature to liquid nitrogen temperature. The structural conversion of〓 between dihydrogen and dihydride is observed firstly. It issuggested that with temperature changing, a fluxional structureconversion between terminal and bridged hydrogen appears. NMR studyand DV-Xα calculation are performed in this paper.

建立了可至液氮温度的原位红外测试装置，进行了室温至液氮温度区间钌多氢化合物的结构研究，首次发现了〓在室温存在分子氢与原子氢的结构流变，发现了新化合物存在随温度变化而出现桥氢与端氢的结构转化；进行了NMR测试及DV—〓计算。

Moreover, how to improve hydrogen production rate and substrate conversion efficiency is also important in the research of fermentative hydrogen production, which is also the key factor to realize industrialization.

产氢的稳定性和持久性是发酵产氢中一直存在的问题，如何在稳定持续产氢的基础上提高产氢的速率和转化率是发酵产氢研究中的重要内容，也是能否实现产业化应用的关键性因素。

It was found experimentally that HIC happens via nonacid nucleation and then quasi-cleavage along {111} planes when C〓 is higher. Otherwise, in the case of lower C〓, hydrogen enhances ductile fracture via hydrogen-enhancing microvoid nucleation, growth and connection.

对预充氢的310钢薄膜进行TEM原位拉伸表明，当氢浓度较高时，氢致断裂通过空洞形核，然后沿{111}面准解理扩展的方式进行；当氢浓度较低时，氢促进纳米空洞形核、长大和连通，进而导致韧断。

Using hydrotreated gas oil as solvent, under the conditions of a reaction temperature of 400 C, a hydrogen partial pressure of 10 MPa and a reaction time of 1 h, a portion of coke deposits could be removed yet without the function of hydrogenating coke.

采用溶剂萃取法除去工业失活催化剂上沉积的焦炭和金属的研究结果表明，用四氢呋喃、吡啶和喹啉这3种含杂原子的有机强溶剂常温萃取催化剂，其去除焦炭能力很弱，而且会因这些溶剂的强吸附作用污染催化剂；盐酸洗涤能有效去除催化剂表面的钙、铁沉积层，但不能去除焦炭；低芳香性的加氢瓦斯油在400 C、H2压力为10MPa、反应1h的条件下可部分去除催化剂上的焦炭，但不具备强的氢化焦炭作用；1，2，3，4-四氢化萘因具有供给原子氢的能力，可以有效地氢化和去除催化剂上的焦炭。

It is revealed that natural diamonds may contain as much as 59 different trace elements. The concentration of each trace element is above 1 ppm(10〓). However, the major impurities are nitrogen, hydrogen, oxygen and boron. The study of the forms of hydrogen in diamonds not only enriched the contents of mantle mineralogy, material sciences and gemology, but also provided some important informations for dealing with some problems concerning the Earth's mantle and core.

中文题名金刚石中氢的赋存状态研究副题名外文题名 The existing states of hydrogen in diamonds 论文作者杨志军导师谢先德研究员彭明生教授学科专业矿物学、岩石学、矿床学研究领域\研究方向学位级别博士学位授予单位中国科学院广州地球化学研究所学位授予日期2002 论文页码总数10，113页关键词空隙氢晶格氢金刚石馆藏号BSLW /2003 /P57 /1 天然金刚石中的微量元素达59种之多，其含量都在10〓级规模以上，且最主要的杂质元素为氮、氢、氧和硼等。

By transmission electron microscope, selected area electron diffraction, powder X-ray diffraction, differential scanning calorimeter as well as self-devised drainage, the effects of metals on grindability, material size, hydrogen storage capacity and hydriding-dehydriding properties are emphatically researched. Fe、Co、Ni were added in pretreatment process of anthracite and the effects of the added metals are researched, also, the action mechanism of metals is discussed on the basis of experimental results.

通过透射电镜、选区电子衍射，X射线衍射、差式扫描量热分析以及自行设计的排水装置等分析测试手段，着重研究了储氢材料中金属对其可磨性、粒度大小、储氢密度、吸放氢性能等的影响，在无烟煤的预处理过程中添加了Fe、Co、Ni三种金属，研究了所添加金属对材料储氢的影响，并在实验结果的基础上探讨了储氢材料中金属的作用机理。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。