氢

Results showed that the RFAs in DCS of Masson pine CTMP were mainly composed of oleic acid,linoleic acid,DHA,pimaric acid,abietic acid and oxidized products of DHA.The ratio of fatty acids to resin acids in FR-DCS,CTMP-DCS,BCTMP-DCS were 1:2.8,1:2.1 and 1:3.8,respectively.

结果发现，马尾松化机浆DCS中的脂肪酸主要有油酸、亚油酸等，树脂酸主要有脱氢枞酸、海松酸、枞酸以及脱氢枞酸氧化物等；一段磨后浆、漂前浆、过氧化氢漂后浆DCS中脂肪酸与树脂酸的比例分别约为1：2.8、1.2：1、1：3.8。

They are, 4 21-amidohydrocortisone Ba1～Ba4, 10 21-amidoprednisolone Bb1～Bb10, 4 21-amidomethylprednisolone Bc1～Bc4, 4 21-amidodexamethasone Bd1～Bd4, 1 21-amidobetamethasone Be1, 1 21-amidoRS Bf1, 1 21-amidocortisone Bg1, 1 21-amidoprednisone Bh1. The amido groups were acetamido, nicotinamido, hemesuccinamido, benzoylamido, methanesufonamido, or arylsufonylamido.

包括：4个21-酰胺基氢化可的松（Ba1～Ba4），10个21-酰胺基氢化泼尼松（Bb1～Bb10），4个21-酰胺基甲泼尼龙（Bc1～Bc4），4个21-酰胺基地塞米松（Bd1～Bd4），1个21-酰胺基倍它美松（Be1），1个21-酰胺基RS（Bf1），1个21-酰胺基可的松（Bg1），1个21-酰胺基强的松（Bh1）。21-酰胺基分别为乙酰胺基、烟酰胺基、单琥珀酰胺基、苯甲酰胺基、甲烷磺酰胺基或取代苯磺酰胺基等。

It starts with an aldol-type condensation in which a solution of the now commercially available E -[3-(4-fluorophenyl)-1-(1-methylethyl)-1 H-indol-2-yl]-2-propenal, 4 , 5 in THF is added to the preformed sodium-lithium salt of tert -butyl acetoacetate 5 at room temperature in THF.

它从一个醛型缩合其中一个解决现在的电子商业可-[3-(4-fluorophenyl)-1-(1-methylethyl)-1吲哚-2-基]-2-丙烯醛、4，5年增加了预四氢呋喃钠-锂盐叔丁基乙酰四氢呋喃在常温5。

The simulation results show that the free energy of hydrogenation of acetylacetone iron to prepare enol-acetylacetone is less than that of the reaction to produce keto-acetylacetone at the same temperature.

计算结果表明：相同温度下，乙酰丙酮铁加氢生成烯醇式乙酰丙酮的反应自由能小于生成酮式结构乙酰丙酮的反应自由能；乙酰丙酮铁加氢更倾向于生成烯醇式结构的产物。

Enterobacter aerogenes was irradiated by He-Ne laser to optimize the laser mutagenesis condition, and to test the heredity, aciduric and hydrogen-producing potential of the mutant. An aciduric mutant with steady hydrogen-producing capability, which was able to grow at acidic pH of 3.0, was obtained. Its capability of hydrogen production was measured in the batch culture experiment.

闻建平，陈宇，刘铭辉(天津大学化工学院生物工程系，天津300072)摘要：运用He—Ne激光辐照产气肠杆菌，对激光诱变参数进行优化，考察了突变株的遗传稳定性、耐酸性和产氢特性结果筛选到一株遗传性状稳定的高产氢突变株，具有良好的耐酸性，在pH值3.0 时仍能生长。

Experimental data for hydrogen isotope fractionations between albitic, K- feldspar, and rhyolitic melts and water vary systematically with pressure from 0.2 to 2 000 MPa.

对 0.2～ 2 000 MPa条件下钠长石熔体、钾长石熔体以及 0.2～ 150 MPa条件下流纹岩熔体-水体系的氢同位素分馏实验数据进行了等压拟合，发现硅酸盐熔体与水之间的氢同位素分馏存在显著的压力效应。

The results of analysis have indicated that, in comparison with the direct dehydrogenation reaction, the coverage of alkoxide is decreased with the increase of the adsorption of acetone.

在直接脱氢反应动力学分析的基础上，将这一方法扩展到更为复杂的氧化脱氢反应中，采用如下的机理对担载银催化剂上异丙醇氧化反应动力学进行了拟合分析。

The theoretical studies on a series of α-hydrogen shift reaction s between the alkylidene and alky-lidyne organometallic molybdenum complexes R3R4Mo(CHR1R2) and R3R4Mo(=CH2)(=CR1R2) were carried out with the density functional theory B3LYP method.

使用B3LYP方法研究了发生在有机钼化合物R3R4Mo(CHR1R2)和R3R4Mo(=CH2)(=CR1R2)之间的α-氢转移反应，探讨了R1，R2，R3和R4位置上不同取代基对α-氢转移反应势垒和产物稳定性的影响。

The theoretical studies on a series of a-hydrogen shift reactions between the alkylidene and alkylidyne organometallic molybdenum complexes R^3R^4Mo（CHR^1R^2） and R^3R^4Mo（= CH2）（= CR^1R^2）were carried out with the density functional theory B3LYP method.

使用B3LYP方法研究了发生在有机钼化合物R^3R^4Mo（CHR^1R^2）和R^3R^4Mo（=CH2）（=CR^1R^2）之间的α-氢转移反应，探讨了R^1，R^2，R^3和R^4位置上不同取代基对α-氢转移反应势垒和产物稳定性的影响。

HCo 〓-catalyzed hydroformylation and isomerization of allene and propyne Allene hydroformylation favors the linear anti-Markovnikov product in high regioselectivity both kinetically and thermodynamically. The origin of this regioselectivity comes from the enhanced stability of the η〓-allylic intermediate (η〓-CH〓CHCH〓 Co 〓.

HCo〓催化的丙二烯和丙炔氢甲酰化反应及异构化反应 HCo〓催化丙二烯氢甲酰化反应的区域选择性主要由不可逆的丙二烯插入步骤决定，动力学和热力学因素都有利于形成anti-Markovnikov中间物种(η〓-CH〓CHCH〓)Co〓，形成Markovnikov中间物种Co〓是不具有竞争性的。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。