再制备

This dissertation deals with the synthetic method of benzotellurazoles containing various substituents in benzene nuclei: introducing tellurium atom to the acetanilide derivatives in ortho-position by direct or indirect ways, then reduced and cyclized to give substituted benzotellurazoles directly or indirectly.

本文系统研究了含各类取代基的苯并碲唑杂环的合成方法，即向原料中用四氯化碲以直接或间接定位的方法引入碲，再经过直接或间接还原关环法制备苯并碲唑。

Ice cream made with the addition of soybean phosphatide and compound stabilizer s is characterized by nice effects and abundant nutrients.

介绍了大豆磷脂的生理功能和功能作用，以大豆磷脂再加复合稳定剂，制备的冰激凌，性能良好，营养丰富。

The carbonaceous alcosol and the silica alcosol were prepared respectively by using aqua-mesophase and tetraethoxysilane as starting materials. Then the two alcosols were mixed and dried in open air and under supercritical fluid conditions to form binary carbonaceous-silica xerogel powders and aerogel powders respectively.

以正硅酸乙酯和炭质水性中间相为原料，分别制得了炭质醇溶胶和硅醇溶胶，将二者进行混合后再利用常压干燥法和超临界流体干燥法分别制备了二元炭质-二氧化硅干凝胶和气凝胶粉末。

Low molecular weight mannuronic acid, guluronic acid and κ carrageenan were prepared from algin and carrageenan by the acid hydrolysis method, and their weight average molecular weights and the distribution widths of molecular weight were determined by high performance gel permeation chromatography respectively.

本文以褐藻胶和κ-卡拉胶为原料通过酸水解分别获得了低聚的甘露糖醛酸、古罗糖醛酸和低聚κ-卡拉胶，并采用 HPGPC法测定了这 3种低聚糖的重均分子量。在此基础上再经硫酸酯化和成盐修饰制备了各自的硫酸酯碱式铝盐。

The effects of above-mentionedconditions on alkylene reaction are studied to obtain the optimum reactive conditionsby orthogonal experiments having seven factors and three levels. GCLE is chosen as material to prepare 7-phenyl acetamideyl vinyl cephalkyl acidp-methoxy benyl eatsr in the experiment. The process is as follow: GCLE reacts withiodide in solvent, and produce 3-iodid, then reacts with PPh_3 to produce Witting agent,and reacts with HCHO to produce 7-phenyl acetamideyl vinyl cephalkyl acid p-methoxy benyl eatsr in alkaline conditions.

试验选用GCLE作为原料制备7-苯乙酰氨基-3-乙烯基头孢烷酸对甲氧苄酯，反应过程如下：GCLE与碘化物、PPh3在溶剂中反应生成3位膦盐，在碱性条件下生成Wittig试剂再与HCHO反应生成7-苯乙酰氨基-3-乙烯基头孢烷酸对甲氧苄酯。

Methods The diabetes mellitus rat model was induced by streptozotozin, and then apomorphine was administrated to set ED diabetes model.

采用链脲佐菌素制备高血糖大鼠模型，选择符合要求的模型再用阿朴吗啡诱导，筛选出符合最终造模要求的糖尿病ED大鼠模型。

The chloroform layer and the aqueous layer were separated by multiple column chromatography including macroporous resin, silica gel and polyamide column and preparative HPLC. The compounds obtained were identified by mass spectra and NMR data.

大青叶乙醇提取物，用氯仿萃取后得到氯仿层和水层，各层再分别采用硅胶柱、大孔树脂柱、聚酰胺柱、制备液相、葡聚糖凝胶柱层析及重结晶等分离手段进行分离、纯化，并应用化学性质和质谱、波谱法（1H-NMR、13C-NMR、HMBC）鉴定其化学结构。

The sample of granular cellular fiber with size of 5-8 mm is produced by using this technology which can be depicted as follow, adhering the asphalt particutate, which can be depicted as follow: adhering the asphalt particulate, which is made of news paper and asphalt, on the surface of fiber by emulsion method, then mixing them by mechanical stirrer, dewatering and pelleting.

采用这一工艺，以新闻纸和优质路用沥青作为原料，通过胶乳法使沥青颗粒均匀粘附在木质纤维表面，再通过机械搅拌、脱水、造粒等工艺，制备出5～8mm的颗粒状路用木质纤维样品，通过室内高温稳定性试验，比较掺入进口颗粒状路用木质纤维和掺入自制颗粒状路用木质纤维的沥青混合料的抗高温永久变形能力。

And Catt in combination with poly-aerylamide gel preparative electrophoresis to isolate serum high density lipoprotein in a pure form was developed.

作者以多聚阴离子—硫酸右旋糖酐沉淀分离，再以聚丙烯酰胺凝胶制备电泳进一步纯化，可获得较纯净的血清高密度脂蛋白。

The low molacular hydrogenated bisphenol A epoxy resin was prepared by the ring-closing reaction of the chlorohydrin ether and alkali and high molecular hydrogenated bisphenol A epoxy resin was synthesis by the addition polymeration of the low one and hygenated bisphenol A.

氢化双酚A和环氧氯丙烷在催化剂作用下开环反应生成了氯醇醚，而后加碱进行闭环反应，制备了低分子质量氢化双酚A型环氧树脂，再将其进一步与氢化双酚A等进行加聚反应，得到高分子质量环氧树脂。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐