合成物质

A chiral phase transfer catalyst, N-benzyl quinine bromide, was synthesized from natural chiral compound. And 2,5-bimethyl-4-(3-nitrobenzene)-1,4-bihydrogenation pyridine-3--4-methyl formate (viz. nitrendipine) was synthesized by this chiral phase transfer catalysis, and characterized by elemental analysis, infrared spectrum,1H nuclear magnetic resornace, and X-ray single-crystal diffraction.Key words: ammonium; chiral phase transfer catalyser; crystal structure

通过对天然手性物质进行修饰合成手性相转移催化剂N-苄基溴化奎宁，并对目标分子2，5-二甲基-4-(3-硝基苯)-1，4-二氢吡啶-3-甲酸乙酯-5-甲酸甲酯进行不对称催化合成，并通过红外光谱和核磁共振氢谱对化合物进行了表征，用X射线单晶衍射法测定了该化合物的晶体结构。

Trial 1. Effects of different dietary cation - anion balance on the digestion and degradation dynamics of fibreTwelve 2 years old Inner Mongolian fine wool wethers(Body weight, 29 ± 3.36kg) with permanent rumen and duodenum cannula , divided into 4 groups of 3 were used to study the effects of 4 levels DCAB on the digestion and rumen degradation of dietary fibre and on digestion of the dietary DM, ADF and NDF and passage at the different sites of the digestive tract of sheep.

试验一：不同日粮阴阳离子水平对纤维物质消化动态学及降解动力学的研究选用 2周岁（体重为 29 ±3.36kg）安装有永久性瘤胃瘘管和十二指肠近端瘘管的内蒙古半细毛羯羊12只，随机分成4组，每组3个重复，采用食糜标记技术和尼龙袋法研究了4种不同DCAB水平对玉米秸秆中干物质、中性洗涤纤维、酸性统涤纤维、纤维素及半纤维素在绵羊瘤胃中有效降解率以及对日粮中DM、NDF及ADF在消化道不同部位流通和消化规律及对瘤胃微生物蛋白质合成的影响。

Besides their physiological functions in the biosynthesis of phenylpropanoid, terpenoid and fatty acid, CYP450s metabolize exogenous chemicals including herbicides.

它不但能够催化苯丙烷类、萜类化合物和脂肪酸等内源性物质的生物合成，而且参与许多外源性物质包括除草剂等的生物氧化。

Generally the catalysts have high activity and good selectivity. At present the coupling reactions of organoborahes with terminal olefins s acid chlorides and aryl halides play an important synthetic approaches in organoborane chemical. The catalysts can be used by many kinds of organometal compounds such as: irons cobalt nickel ruthenium rhodium palladiums titaniums zirconiums tins indium and lithium organic compounds; The achievement has been amazed in preparing of unsaturated or saturated compounds and in synthesizing of natural products bioactive molecules and chiral compounds.

目前，卤代烃与不饱和烃的偶联反应和有机硼试剂与酰卤和卤代烃的偶联反应已成为有机合成的研究热点，此类反应可用铁、钴、镍、钌、铑、钛、锆、锡、铟、锂等多种有机金属化合物来催化，用于形成含饱和或不饱和C-C键的化合物，并已在天然产物、液晶、具有生理活性物质和手性化合物的合成中应用。

Second,we set the database of morphological characteristics of intercepted and captured bark beetle during quarantine,and the last,we studied the molecular identification of 15 species.The results were showed as below.1.Application of bark beetle semiochemicals in timber quarantine1.1 EAG and walking responses of bark beetle to different semiochemicalsSemiochemicals which can induce the olfactory response and aggregation behavior of bark beetle include host volatile components,pheromones secreted by bark beetles itself or synthesized with host compounds by bark beetles,and the compounds released by tissue of decaying wood under the pressure of microorganism after bark beetle colonization.

信息化合物在小蠹虫检疫中的应用1.1小蠹虫对各种信息化合物的触角电位及嗅觉反应能诱发小蠹虫产生嗅觉反应，进而使之产生聚集行为的信息化合物有很多种，主要包括：树木的挥发性组分；小蠹虫自身产生的信息素和寄生后转化寄主化学物质合成的信息素统称虫体信息素以及树木被小蠹虫寄生后，其组织在微生物作用下释放的物质。

Biochemists may skillfully create intricate molecules and substances, as in the synthesis of the substance that is called a gene

生物化学家可以巧妙制造出复杂的分子和物质，如称为基因物质的合成。

Finally, N ethey[3,3 dimethyl spiralindoline naphthoxazine]was synthesized by the addition of 1 nitroso 2 naphthol also,the photochromic mechanism of the substance and its photochromic phenomenon in ethanol were studied.

报道了以苯肼和 3 甲基 2 丁酮为原料首先合成 2 ，3 ，3 三甲基吲哚，吲哚再与碘乙烷亲核取代，碱化得费舍尔碱，最后与 1 亚硝基 2 萘酚作用合成N 乙基 [3 ，3 二甲基螺吲哚啉萘并恶嗪 ]的全过程，并研究了该物质的变色机理以及在乙醇溶剂中的光致变色现

The idea of analysing or synthesising small quantities of chemicals in a chip-sized apparatus is not new, but labs on chips have conventionally relied on systems of tiny pipes etched into them to move the chemicals around.

在芯片大小的仪器上对少量的化学物质进行分析或人工合成这一概念并不算新，但是传统的片上实验室所依赖的系统是通过细微的蚀刻通道来导引化学物质的移动的。

The idea of analysing or synthesising small quantities of chemicals in a chip-sized apparatus is not new, but labs on chips have conventionally relied on systems of tiny pipes etched into them to move the chemicals around.

在一个芯片大小的设备上分析、合成少量化学物质的想法并不新鲜，但芯片上的实验室仍旧依靠蚀刻在芯片上细小的管道系统输送化学物质。

In metabolizing argine, there had no obvious difference among three strains and the control 3 1 DH. Thus, three selected strains had better characters of degrading argininc that they couldn"t over-degrade arginine to produce large numbers" precursors of carcinogenic ethyl carbamate as citrulline, etc.

分析表明，精氨酸分解代谢方面，三个菌株与对照31DH没有明显差异，由此说明，三个优选菌株精氨酸代谢特性良好，不会过多降解精氨酸、代谢产生瓜氨酸等前体物质，从而不会导致致癌物质——氨基甲酸乙酯的大量合成。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！