查询词典 hydrogen fluoride

A compound of formula wherein R1 is hydrogen, halo or methoxy; R2 is hydrogen, halo, methyl, ethyl or methoxy; R3 is carboxy, tetrazolyl, or -CONHSO2R where R is methyl, ethyl, phenyl, 2,5-dimethylisoxazolyl or trifluoromethyl; T is -CH2- or -SO2-; and ring A is 3-chlorophenyl, 4-chlorophenyl, 3-trifluoromethylphenyl, 3,4-dichlorophenyl, 3,4-difluorophenyl, 3-fluoro-4-chlorophenyl, 3-chloro-4-fluorophenyl or 2,3-dichloropyrid-5-yl; or a pharmaceutically acceptable salt or prodrug thereof, as well as pharmaceutical compositions containing them are described and claimed.

本发明涉及一种式化合物，其中R 1 是氢原子、卤素或甲氧基；R 2 是氢原子、卤素、甲基、乙基或甲氧基；R 3 是羧基、四唑基或－CONHSO 2 R 4 ，其中R 4 是甲基、乙基、苯基、2，5－二甲基异∴唑基或三氟甲基；T是－CH 2 －或－SO 2 －；环A是3－氯苯基、4－氯苯基、3－三氟甲基苯基、3，4－二氯苯基、3，4－二氟苯基、3－氟－4－氯苯基、3－氯－4－氟苯基或2，3－二氯吡啶－5－基；或其药用允许的盐或前药，还包括所阐述和要求权利的含有它们的药用组合物。

Was founded in 1993, after reorganization of assets in 2003 as "phosphide", more than 500 million fixed assets, the existing 150 staff, of whom technical staff of more than 20, are specializing in the production of phosphate (sodium pyrophosphate, disodium hydrogen phosphate, sodium hexametaphosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate) enterprise.

河南省焦作市磷化实业有限公司（原武陟县兴璋化工有限公司）建于1993年，后经2003年资产重组为&磷化&，公司固定资产500多万，现有职工150人，其中技术人员20多名，是专业生产磷酸盐（焦磷酸钠，磷酸氢二钠，六偏磷酸钠，磷酸二氢钾，磷酸氢二钠，磷酸三钠）企业。

Volta also experimented with finding the best explosive mixture of hydrogen and air, and of hydrogen and oxygen.

伏打也以发现氢加空气和氢加氧的最好易爆发混合作实验。

Oceans on Earth will boil away. The Sun will run out of hydrogen fuel in its core about 5.5 billion years from now and start burning hydrogen in the surrounding layers.

地球上的海洋将会沸腾蒸发。55亿年后，太阳内核的氢燃料将会燃烧殆尽，外层的氢燃料就会开始燃烧。

And no more than about the amount of hydrogen and most preferably at least about 25% less hydrogen.

和没有于有关氢的数量事和最宁可至少大约 25%较少的氢。

The results show the hydrogen bonding is formed between acetone and water molecules and the strength of hydrogen bonging is related to the concentration of acetone.

由此说明丙酮与水分子间形成了氢键，而且氢键的强弱与丙酮水溶液的浓度有关。

The effect of electrolyte concentration and hydrogen pressure on hydrogen electrode process catalyzed by noble metal have been studied.

讨论了电解质浓度和氢气压力对低载量贵金属催化氢电极过程的影响。

Chlorine atoms were selectively introduced into the chlorin ring based on different reactivity between vinyl group at 3-position and 20-meso position by electrophilic addition and electrophilic substitution using hydrogen peroxide/hydrochloric acid, N-chlorosuccinimide, hydrogen chloride (or concentrated hydrochloric acid) as chlorinating reagent.

以过氧化氢/盐酸、N-氯代丁二酰亚胺、氯化氢为氯化剂，根据3-乙烯基和20-meso-位的不同化学反应活性，通过亲电加成和亲电取代反应，在二氢卟吩环上选择性地引进氯原子，完成8种未见报道的具有叶绿素-a基本碳架的氯代二氢卟吩衍生物的合成。

The Clostridium, has been well studies for its ability to form endospores and its potential to generate hydrogen. In this research, we focus on the indigenous Clostridia and physiological characteristics of hydrogen production.

本研究之主要目的是希望能从不同来源样本分离出高效能的产氢菌株，研究高效能产氢菌株的生理特性以作为调控其产氢能力的基础。

The Clostridium, has been well studies for its ability to form endospores and its potential to generate hydrogen. In this research, we focus on the indigenous Clostridia and physiological characteristics of hydrogen production.

中文摘要本研究之主要目的是希望能从不同来源样本分离出高效能的产氢菌株，研究高效能产氢菌株的生理特性以作为调控其产氢能力的基础。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。