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做了10年传统室内装修生意的张德芳称他的创业激情从来没被磨灭，最大的爱好之一就是去书店阅读相关书籍寻找创业灵感，他通常要花大半天时间呆在书店。去年，解放碑某书城里一本介绍网站发展潮流的书籍吸引了张德芳的眼球，他从中翻到一个叫&威客&(Witkey，网上服务者，利用自己的聪明、经验、技能通过网络为其他网友提供服务，并获取收益)的生疏名词。

A new convenient synthesis of a series of 1-aryl-2-propanones using aromatic amine s as precursors, via diazo reaction and improved Meerwein arylation reaction under mild conditions, was achieved.

以芳香胺为原料，经重氮化和改进的Meerwein芳基取代反应，合成了一系列的1-芳基-2-丙酮，其中1-(3，5-二三氟甲基苯基)-2-丙酮是一个新化合物。

The relation of PAHs emission and Dioxin emission was discussed from theory and experimentation in this article, and it was indicated that PAHs could possibly synthesize Dioxin as an usher reagent.

本文还从理论和试验分别分析了多环芳烃排放和二恶英排放之间的关系，结果认为两种情况下多环芳烃都可能成为合成二恶英的前驱物。

For the α-arylation of ethyl acetoacetate, the product was α-aryl ethyl acetoacetates, rather than ethyl α-arylacetates which are the major products in other catalytic systems.

较为惰性的氯代芳烃在Pd2/L1的催化下，也能够跟1，3-二羰基化合物发生α-芳基化反应。

Aryl azides are by far the most frequently used photoaffinity probes because they can be easily synthesized, as well as being chemically stable in the dark and highly reactive upon photoirradiation.

与普通的芳基叠氮基团相比，全氟取代的芳基叠氮基团具有更高的光标记效率；而香豆素的叠氮衍生物则同时具有荧光标记能力和光亲合标记能力，具有更广泛的应用潜力。

Proton and C-13 NMR spectroscopy analysis assessed the carbon aromaticity of the supercriticaly extracted bitumens to be 0.32-0.34, it appears in fair agreement with the aromaticity determined directly by using solid state C-13 NMR techniques.

然后，分别用核磁共振波谱法测定它们的芳碳率，结果分别为0.30和0.34。将超临界流体抽提沥青分离为族组分，用核磁共振与X-射线衍射法分析测定它们芳碳部分的主要结构参数及其聚集态。

The Aphos-Pd_2 system was proved very efficient for the coupling of alkyl boranes and the results are collected in Chapter 4.At the temperature of 50℃,a variety of aryl chlorides successfully coupled with alkyl boranes as well.

该类型配体对烷基硼试剂与溴代芳烃和烯烃的Suzuki偶联反应有着很好的效果，并且被成功地用于一系列氯代芳烃的反应，但反应温度为50℃。

It could be observed that the [2] catenanes showed absorption maxima in 438. 0nm, 463. 0nm and 517. 0nm respectively, due to the interaction between calix [4] arenocrowns and the bipyridinium ring units.

另外，通过紫外-可见光谱，研究杯[4]并冠醚[2]索烃类化合物中的电子转移情况，发现组装后生成的杯[4]芳烃[2]索烃类化合物中，由于富电子的杯[4]芳烃冠醚和缺电子的联吡啶盐之间π-π堆积相互作用依次增强，它们分别在438.0nm，463.0nm，517.0nm的位置产生新的吸收峰。

Treatment of the diacetoxy-calix [4] arene with a series of ditosylates in dry MeCN in the presence of NaOH resulted in formation of electron-rich calix [4] areneocrowns, which reacted with 4, 4'-bipyrindinium and p-bis -benzene at room temperature in dry MeCN to afford self-assembling [2] catenanes by π-π stacking interaction.

以杯[4]芳烃为原料，通过三氟乙酸铊将其氧化成醌，醌类化合物在Zn粉、冰醋酸、少量盐酸和过量的乙酸酐中反应得到双乙酰化产物，利用氢氧化钠使其水解，然后再与各种对甲苯磺酸二酯进行环化反应，得到一系列具有富电子空腔的杯[4]芳烃并冠醚。

Fat drippings create smoke that is filled with carcinogenic polycyclic aromatic hydrocarbons, or PAHs. When the smoke envelopes the food, it transfers the PAHs onto the surface of the meat. And when meat, chicken and fish are grilled at high temperatures for long periods of time, compounds inside the food react and create heterocyclic amines, or HCAs. HCAs are worrisome because in lab studies they've been shown to trigger breast, colon and prostate tumors in rats and mice.

滴下来的油脂产生的烟雾充满了致癌的多环芳烃，简称PAHs，当烟雾环绕在食物周围的时候，这些多环芳烃也附着在了食物的表面，当猪肉，鸡肉或是鱼肉在长时间的高温烧烤时，这些食物本身所含有的成分产生了化学变化生成杂环胺类物质，简称HCAs，这类物质相当的麻烦，因为实验室研究发现它们会引起大鼠和小鼠乳腺，结肠以及前列腺部位的肿瘤。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新