查询词典 hydrogen fluoride

The reaction performance of Pt-Sn-Li/Al_2O3/FeCrAl catalyst was measured,and the properties of the catalyst were characterized.It was found that reaction temperature,LHSV and the molar ratio of hydrogen to alkane have greatly affected on the catalytic performance of the Pt-Sn-Li/Al_2O_3/FeCrAl catalyst.Under a set of optimal reaction conditions,at 0.1 MPa,470℃,the molar ratio of hydrogen to alkane of 4 and LHSV of 0.14 mL·m~(-2)·h~(-1),the dodecane conversion is 6%,and the dodecene selectivity is about 72%.

结果表明：工业催化剂的催化性能比至今实验室制备的γ-Al_2O_3和SBA-15颗粒负载型颗粒状催化剂的性能好；反应温度、液时空速和氢烃摩尔比对Pt-Sn-Li/Al_2O_3/FeCrAl金属基整体式催化剂脱氢性能都有重要影响，最适宜的反应条件是压力为0.1 MPa，反应温度为470℃，进料氢烃摩尔比为4和LHSV为0.14 mL·m~(-2)·h~(-1)，此时十二烷的转化率约为6%，十二烯的选择性约为72%；活性组分涂层与金属基体结合良好。

The hydrogen chloride producing design needed the whole optimization design-aside of two-appulse-one hydrogen chloride graphite synthetic furnace system. With the analysis on the relation of different types of chillers and the productive forces, the YKB round pass graphite chiller, endwise wing drivepipe graphite cooling pipe and equipment design methods for graphite chiller modality were adopted.

氯化氢生产设计中缺少对二合一氯化氢石墨合成炉系统的整体优化设置，通过冷却器形式和系统生产能力的关系研究，确定石墨冷却器采用YKB型圆块孔式石墨冷却器，石墨冷却管采用纵向翅片管型套管式石墨冷却管。

Occurrence of RE hydride was identified in the Al-Si alloy containing RE andenrichment of hydrogen in polynary RE intermetallic compound was determined by means ofEPMA, secondary ion mass spectrography, Hg-free vacuum drivepipe hydrogen-meter to-gether with metallography and porosity measurement.

采用电子探针、二次离子质谱、无汞真空套管测氢仪等检测手段，并配合金相分析及试样孔隙度的测定，鉴定出含稀土的Al-Si合金中有稀土氢化物的存在，确认在多元稀土金属间化合物中氢的富集，提出稀土具有较强固氢作用的观点。

The company focuses on utilizing Solid Polymer Electrolyte—SPE positive ion exchange membrane to electrolyze pure water, carrying on R＆D, producing and selling of hydrogen generator, hydrogen fuel batteries, etc.

本公司着重利用固体聚合物电解质（Solid Polymer Electrolyte—SPE）阳离子交换膜，进行纯水电解及燃料电池等产品的研发、生产、销售。

Esculetin had the highest affinity toward the binding site of XO, and this was due to hydrogen bonding interactions. The hydroxyl group at C-6 formed hydrogen bonds with the carboxyl group Glu802 that played critical role on XO binding.

在8种香豆素衍生物中发现esculetin与黄嘌呤氧化酶的亲和力最高，因为在esculetin的结构上，C-6的OH基团可与麸胺酸802的COOH基团形成氢键，此键结对於抑制黄嘌伶氧化酶活性是很重要的，因而增加了两者结合的稳定性。

Hydrogen storage alloy electrode ; Hydrogen evolution reaction ; Overpotential ; Faradaic impedance

贮氢合金电极；氢气析出反应；超电势；法拉第阻抗

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。

Especially, in complex 2 the hexacyclic hydrogen-bonded ring adopted a chair conformation is constructed via the hydrogen bonds of Clsubscript 2A…O(subscript 6A…O(subscript 5A)…Cl(subscript 2B)…O(subscript 6B)…O(subscript 5B).

配合物2中由Cl(下标 2A)…O(下标 6A)…O(下标 5A)…Cl(下标 2B)…O(下标 6B)…O(下标 5B)构成的六员氢键环呈椅式构象。

Hexadecyl Hydrogen Maleate is a new kind of analyzer crystal for soft X-ray spectroscopy, with a large 2d spacing of 58.58A. HHM is hoped to give a better growth habit than octadecyl Hydrogen Maleate, because of its shorter chain length and narrower 2d spacing.

马来酸氢十六酯是一种新型的软X—射线分光晶体，晶面间距2d等于58.58A，与OHM属同一系列分光晶体，碳链的缩短、晶面间距的减小有望给出比OHM更好的生长和结晶习性。

Results show that intramolecular hydrogen transfer is not favored in view of the energy trend along IHT coordinate in the region such as hypericin's peri region, where two hydrogens of hydroxyl groups bond with a common oxygen of carbonyl group and exists two IHBs in the peri region. However, intramolecular proton transfer often occur in the molecule with hexahydric cycle hydrogen bond, where only one pair of adjacent hydroxyl group and carbonyl group.

此外选择设计了一个具有三个分子内氢键的体系，兼具金丝桃蒽酮和其他苝醌类光敏剂的分子内氢键特点，研究表明两个羟基氢与共同的羰基氧形成的氢键由于存在较高的势垒，很难发生分子内氢传递，即具有金丝桃蒽酮端位结构的分子其分子内氢传递很难发生，而一般的能形成六元环状结构的分子内氢键体系容易发生分子内氢传递。

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