苯并

The paper introduced three processes to prepare isochroman from β-phenethyl alcohol and polyformaldehyde:HCl catalysis,AlCl_3 catalysis and toluene-p-sulfonic acid catalysis,and discussed its reaction mechanism,using toluene-p-sulfonic acid catalysis method to prepare isochroman ,the yield is 46%,purity is 96%.

用β-苯乙醇和多聚甲醛为原料，进行了HC l催化法，三氯化铝催化法和对甲苯磺酸催化法的合成路线的实验，并对其反应机理进行了探讨，应用对甲苯磺酸催化法合成异色满的合成路线，得率46%，纯度96%。

Aromatic constituents of Huangdan Oolong tea were analysed with GC and MS and were compared in different green-making humid conditions.The major aromatic constituents of Huangdan Oolong tea were nerolidol,α-farnesene, linalool and its oxide, geraniol, pheny lacetal dehyde, indole, cis-jasmine lactone β-ionone cis-jasmone, benzyl acetate and so on.At the same temperature,the content of aromatic constituents were different, the aromatic quality in the 75% humid condition was better,which was more fragrant and kept longer.

用GC/MS法分析了黄旦品种乌龙茶的香气组分，并对不同湿度做青环境条件下生产的乌龙茶香气组分进行比较分析表明：黄旦乌龙茶主要香气成分为橙花叔醇、α-法呢烯、芳樟醇及其氧化物、香叶醇、苯乙醛、吲哚、顺-茉莉内酯、β-紫罗酮＋顺-茉莉酮、乙酸苄酯等；在相同温度（23℃），不同湿度做青环境生产的黄旦乌龙茶香气主要特征成分含量和精油总量各不相同，且香气品质以做青环境相对湿度75％为好，香气高且持久。

Full enzymatic synthesis of N-protected Leu-enkephalin was successfully achieved via 3+2synthetic route by α-chymotrypsin and thermolysin, and the Z-protected Leu-enkephalin phenylhydrazine was obtained in tert-amyl alcohol by thermolysin for the first time.

以3+2的合成路线使用α-胰凝乳蛋白酶和嗜热杆菌蛋白酶完成了N-保护的亮-脑啡肽的酶法全合成，并在第三戊醇中首次以嗜热杆菌蛋白酶为催化剂得到了Z-保护的亮-脑啡肽酰苯肼衍生物。

The toxicity of selected compounds and their binary mixtures of sodium dodecyl sulfate with three substituted aromatic compounds to photobacterium phosphoreum was investigated, respectively.

研究阴离子表面活性剂十二烷基硫酸钠和苯酚、硝基苯、甲苯3种取代芳烃对发光菌的单一毒性，以及在等浓度配比条件下，SDS与这3种取代芳烃二元混合体系的联合毒性效应，并采用毒性单位、相加指数、相似性参数和泥合毒性指数进行毒性评价。

In fact, it is of great significance to in-depth understand the relationship between condensed state structure and photophysical properties, which can provide more insights into the design of novel optoelectronic polymers as well as the fabrication of high performance devices.

因此，本论文设计合成了一系列含芴苯结构的发光聚合物，同时通过各种表征手段详细研究了所制备的系列聚合物分子设计-聚集态结构-光电等物理性能之间的关系，并得到了一些非常有意义的研究结果。

In the present paper, the silver-intermediate in development process of PTG material-disilver phthalate (Ag2PA) was prepared by the liquid deposition method, and Ag2PHZ2PA·H2O complex was synthesized successfully by liquid dispersion means using Ag2PA and phthalazine as the reactants. The composition of Ag2PA and Ag2PHZ2PA·H2O was determined by ICP-AES and elemental analysis,...

采用液相沉淀法合成了PTG材料热显成像过程的含银中间体邻苯二甲酸二银(Ag2PA)，并进一步使其与酞嗪络合形成了Ag2PHZ2PA.H2O配合物，通过元素分析、电感耦合等离子体原子发射光谱分析对Ag2PA与Ag2PHZ2PA.H2O配合物的元素组成进行了确定，采用X射线粉末衍射分析、傅里叶变换红外光谱分析以及热分析等方法对Ag2PA与Ag2PHZ2PA.H2O进行了表征，实现了对PTG材料热显成像过程含银中间体的定性分析。

Twenty three samples were apparently classified into 4 groups by partial least square-discriminant analysis. A brief list of 20 differential compounds is presented, including cnidilide, 3-n-butylphthalide and butylidene phthalide.

结合偏最小二乘法-判别分析，可以很好地将4个产区的挥发油样品加以区分，并找出20种差异最大的化合物，其中包括4种苯酞类物质。

Tetrahydroisowuinolin derivatives and phthalide derivatives were designed and synthesized on the basis of a PDE4 inhibitor pharmacophore model set up through computer simulation. Some tetrahydroisowuinolin derivatives synthesized were evaluated on their activity against PDE4 for study on the structure-activity relationship.(7-cyclopentyloxy)-6-methoxy-3,4-dihydroisoquinolin-2(1H)-yl(4-hydroxy-3-methoxyphenyl)methanone (155) and Methyl 7--6-methoxy-2-(4-methoxy- benzoyl)-1-phenyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylate (170) showed good activity against PDE4, which were chosen as the lead compounds to design and synthesize another analogs in order to develop selective PDE4 inhibitors with better activity.

分别设计合成了以四氢异喹啉和氨基苯酞为骨架的两类小分子杂环化合物，并对部分四氢异喹啉衍生物测试了其相关的生物活性，初步确定了其构效关系，发现了两个对PDE4有较好抑制活性的先导化合物(7-cyclopentyloxy)-6-methoxy-3，4-dihydroisoquinolin-2(1H)-yl(4-hydroxy-3-methoxyphenyl)methanone (155)和Methyl 7--6-methoxy-2-(4-methoxy- benzoyl)-1-phenyl-1，2，3，4-tetrahydroisoquinoline-3-carboxylate (170)。

Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.

在以硫酸二甲酯为甲基化试剂对3，4-二溴马来酰亚胺进行N-甲基化反应合成3，4-二溴-N-甲基马来酰亚胺的同时，以碳酸二甲酯为甲基化试剂，对3，4-二溴马来酰亚胺、邻苯二甲酰亚胺、琥珀酰亚胺等酰亚胺类化合物的N-甲基化反应进行了研究；考察了1，4-二氮杂双环[2.2.2]辛烷，1，8-二氮杂双环[5.4.0]十一碳-7-烯、碳酸钾和四丁基溴化铵等作为催化剂对碳酸二甲酯N-甲基化反应的反应时间和收率等的影响，并应用碳酸二甲酯为甲基化试剂，合成了N-甲基-3-溴-4-(1-甲基-吲哚-3)-马来酰亚胺。

A phenylalanine ammonia-lyase gene was cloned from Pittosporum tobira.

从海桐中克隆得到苯丙氨酸解氨酶基因cDNA片段，并命名为PitPAL，GenBank登录号为AY747678。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。