合成

L-prolinamide/PPTS system was developed to catalyze Robinson annulation of 1,3-cyclohexanedione derivatives. Using this system, the functionalized carbon chain of Wieland-Wiescher ketone could be synthesized in high enantioselectivity, which was a useful synthon for structural diversity of total synthesis of natural product.

二、发现了L-prolinamide／PPTS体系可以催化Ronbinson环化1，3-环己二酮衍生物，实现含季碳且具有多官能团侧链的Wieland-Wiescher酮高对映选择性的合成，为天然产物结构多样性的合成奠定了基础。

We have had the extensive studies on theα-acetyl-α-carbamoyl ketene--acetals and its further applications, for example, their adols condensations with aldehydes giveα-alkenoyl-α-carbamoyl ketene--acetals which can be utilized as the 1,5-bielectronic five-carbon components to react with various binucleophlilic species in a [5+1] annulation.

我们小组在以前的工作中对α-乙酰基-α-胺甲酰基二硫缩烯酮在合成中的应用进行了深入的研究，如与醛缩合生成α-烯酰基-α-胺甲酰基二硫缩烯酮，将其作为1，5-双亲电五碳合成子的[5+1]成环策略等。

The results suggested that protein content was increased under 6-BA treatments, but single grain weight and starch content were decreased after anthesis.

上述结果表明6-BA处理促进了籽粒蛋白质的合成，但降低了籽粒质量和淀粉的合成，旗叶处理较穗处理作用大。

Recombinant plasmid pFf-22-Trp operon was successfully constructed, and both the anthranilate synthase and tryptophan synthase activities of expressed product increased. It laid a foundation of construction of recombinant E. coli strain for production of tryptophan in a large scale.

已成功构建了重组表达质粒pET-22b-Trp operon，邻氨基苯甲酸合成酶和色氨酸合成酶的活性在大肠杆菌中得到了提高，为高产色氨酸基因工程菌的构建奠定了基础。

Results Agarose gel electrophoresis proved that the length of PCR product was about 7 000 bp. SDS-PAGE showed that the target protein was highly expressed. Compared with those of control, the anthranilate synthase and tryptophan synthase activities of expressed product increased by 2.7 and 3.2 folds respectively.

结果 凝胶电泳可见代PCR扩增产物大小约为7000bp，SDS-PAGE鉴定目的蛋白分别得到了表达，邻氨基苯甲酸合成酶和色氨酸合成酶的活性分别比对照提高了2.7和3.2倍。

It could be used to compound antivirus or anticancer drug, and could be used to control gene expression.

所制产品在药物合成以及生物学研究中具有非常重要的应用，可用来合成抗病毒和抗肿瘤的药物，同时，在分子生物学研究中可以被用来控制基因表达。

Based on the addition of vinyl magnesium bromide to the chiral non-racemic synthon 2 derived from-1, an enantioselective total synthesis of-3, the antipode of marine alkaloid halitulin 10 steps, overall yield: 5.3% from (R-1 was achieved using aza-Claisen rearrangement as a key step.

取得的主要结果如下：一、从-苯基甘氨醇1出发，通过已知的哌啶手性合成砌块2的加成反应，建立了经aza-Claisen重排反应进行海洋生物碱halitulin手性分子片断的对映体--isohaliclorensin 3不对称合成的路线。

Based on the addition of vinyl magnesium bromide to the chiral non-racemic synthon 2 derived from-1, an enantioselective total synthesis of-3, the antipode of marine alkaloid halitulin 10 steps, overall yield: 5.3% from (R-1 was achieved using aza-Claisen...

取得的主要结果如下：一、从-苯基甘氨醇1出发，通过已知的哌啶手性合成砌块2的加成反应，建立了经aza-Claisen重排反应进行海洋生物碱halitulin手性分子片断的对映体--isohaliclorensin 3不对称合成的路线。

In this dissertation, i has used inverse microemulsions technique to synthesize nano-magnetic particles . This method made nanometer sized cages formed by dissolving surfactant molecules in an apolar organic solvent. The chemical reactions were carried out inside the cages to synthesize nanoparticles. Because the growth of the naoparticles are limited in the cages, the particles were nanometer sized particles.

论文中本人以逆微乳化法去合成磁性奈米粒子，这个方式主要是利用在非极性有机溶液当中使溶解的界面活性剂构成一个奈米级的空洞，控制化学反应在空洞中反应合成粒子，也因为粒子生成受到空洞的限制，以致生成的粒子为奈米粒子。

These results suggest that the activate spleen-energy method can achieve appetitive purpose by not only affecting the gastrointestinal tract function in periphery, but also regulating the process of ingestion in brain. The basic research about ingestion indicate: one hand, after food enters the gastro-intestinal tract, the endocrine cell of the intestinal tract is activated and secrete many kinds of brains intestines peptide, the level of the brain intestines peptide in blood as the periphery signal spreads to the central nervous system regions that control digest and feeding behavior. On the other hand, it has been shown that dorsal parabranchial neurons, containing CCK-8S, extend fibers to the VMH and are involved in the inhibition of feeding .

关于摄食控制的基础研究表明，一方面食物进入胃肠道后，激活肠道的内分泌细胞，分泌多种脑肠肽如CCK-8S，这些脑肠肽在血中的水平作为外周信号可通过"肠—脑轴"传入中枢神经系统介导消化和摄食行为的部位，影响摄食中枢神经元的活动调节动物的摄食行为；另一方面中枢神经元可合成释放内源性的神经肽直接作用于摄食中枢神经元调节摄食，如中枢鳃旁体神经元的神经纤维就可延伸到达VMH，并且合成释放内源性的CCK-8S。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。