氢

Part III, 12-benzyl dehydroabietyl thioisocyanate was synthesized from methyl 12-benzyl dehydroabietic acid, by hydrolysis, chloride, Curtius reaction to give isocyanate which was hydr- olysied to amine under acidic condition, and with the method of CS2 at last, the maximal excitat- ion wavelength was bathochromic shifted 14nm compared to DDHA-NCS.

第三部分，从12-苯甲酰基脱氢松香酸甲酯出发，经过水解，酰氯化、Curtius reaction得到异氰酸酯，在酸性条件下水解成胺，最后由二硫化碳法得到一种新的荧光衍生试剂12-苯甲酰基脱氢松香酸异硫氰酸甲酯，与DDHA-NCS相比，最大激发波长红移了14nm。

At least one major DNA adduct was detected in the bone marrow of mice treated with benzene,phenol,hydroquinone,benzoquinone respectively and coadministration of phenol and hydroquinone.

我们采用改进的32P后标记法，对苯及其代谢产物苯酚、氢醌、苯醌及苯酚和氢醌联合染毒在小鼠骨髓中形成DNA加合物的情况进行了初步研究，以探讨苯及其代谢产物的髓性毒作用。

The catalytic activity and selectivity for hydrodesulfurization and hydrodenitrogenation were studied by using benzothiophene, dibenzothiophene and quinoline as model compounds.

在N2-H2下，利用程序升温还原氮化反应制备氧化铝负载的β-Mo2N0.78催化剂，并以苯并噻吩、二苯并噻吩和喹啉为模型化合物，考察该催化剂的加氢脱硫、加氢脱氮活性和选择性。

In this thesis, investigations focused on heteropoly acids-catalyzed C-C and C-N bond formation reactions and the synthesis of xanthenediones and acridinediones under thermal conditions are described.1.12-Phosphotungstic acid has been used as an efficient,eco-friendly,and air- and moisture-stable catalyst to promote the direct dehydrative substitution of the hydroxy group of benzylic and allylic alcohols with variousβ-dicarbonyl compounds.

本篇论文主要描述了杂多酸催化下的C-C和C-N键的生成，以及无溶剂直接加热下合成十氢氧杂蒽二酮和9-芳基十氢吖啶二酮。主要内容如下：1。在磷钨酸催化下，1，3-二羰基化合物与醇能够顺利偶合，脱除一分子的水，生成烷基化的1，3-二羰基化合物。反应在甲苯中进行时，二芳基甲醇能与各类1，3-二羰基化合物反应，成率很高；但对于1-苯乙醇，只能得到很低的产率。

Benzylidene[1,3-bis(2,6-dimethylphenyl)-4,5-dihydroimidazol-2-ylidene]dichloro(2-methylpyridine)ruthenium (62), benzylidene[1,3-bis(2,6-dimethylphenyl)-4,5-dihydroimidazol-2-ylidene] dichloro(2,4-dimethylpyridine)ruthen ium (63) introduce ortho substituted pyridine as dissociating ligand to weaken Ru-N bondand accelerate dissociation of pyridine derivative ligand through steric hindrance.

在钌卡宾配合物[1，3-二-(2，6-二甲苯基)-4，5-二氢咪唑基]-苯亚甲基-(2-甲基吡啶)-二氯合钌(62)，1，3-二-(2，6-二甲苯基)-4，5-二氢咪唑基1-苯亚甲基-(2，4-二甲基吡啶)-二氯合钌(63)中，邻位取代的吡啶作为解离配体，通过邻位基团的空间效应削弱钌-氮配位键，使配体更易解离，提高了催化剂的初活性。

Microstructure evolution of biphase TC21 alloy before and after hydrogenation as well as dehydrogenation was investigated by XRD, OM and TEM.

中文摘要：利用XRD、OM和TEM研究两相钛合金TC21置氢前后以及除氢后的显微组织变化。

A salt of bromic acid .

锌酸盐一种含氢氧化锌的盐，例如氢氧化锌zn2

Its production technologies (such as brucite milling method and chemical synthesis method) and modification researches were summarized,and the research hot spots of chemical synthesis method and modification were mainly introduced.

综述了氢氧化镁的生产技术(水镁石磨细法和化学合成法)以及改性研究，重点介绍了氢氧化镁的化学合成法以及改性研究的热点。

Three hydroxyapatite powders (HAP1, HAP2 and HAP3) were prepared by hydrolyzation process using brushite, precipitation method using calcium hydroxide and ammonium phosphate and neutralization method using calcium hydroxide and phosphoric acid, respectively. Hydroxyapatite/collagen composite was prepared by in situ precipitation method using calcium hydroxide, phosphoric acid and bovine collagen which was extracted from the fresh bovine tendons.

本研究以相关钙盐、磷酸盐为原料，分别用二水合磷酸氢钙水解法、氢氧化钙-磷酸氢二铵沉淀法和氢氧化钙-磷酸酸碱中和工艺制备了三种羟基磷灰石粉体，分别为HAP1、HAP2和HAP3；并以氢氧化钙、磷酸和从牛腱中提取的胶原为原料通过原位沉淀制备了羟基磷灰石/胶原复合材料。

The effects of reaction conditions on the catalytic activity have been examined and a more than 95% yield of γ-butyrolactone obtained. Moreover, the above results are comparable with the catalytic activity of the same catalyst for hydrogenation of maleic anhydride.

结果表明，Cu/ZnO/Al2O3催化剂不但具有良好的顺酐加氢活性，而且在较温和的反应条件下对于1，4-丁二醇脱氢同样具有良好的催化活性，γ-丁内酯的收率可达95%以上。

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。