乙二醇

Solubility measurement shows synthesized benzyl alginate was soluble in formamide, glycol, propylene glycol, and water, a...

试验表明，合成的褐藻酸苄酯可溶于甲酰胺，乙二醇、丙二醇和水，在二甲基甲酰胺中可被溶胀。

The research indicated that under the compound use of hydroquinone and methyl quinone or independent use of phenothiazines or nitrogen oxygen free radical made the polymerization retarder, opposite-methyl-phenylsulfon made the esterification catalyst, toluol made the backflow including water condition, the acid mellowly compared to when it was 1.15, the production rate of the synthesis methylacrylic acid polyethylene glycol single methyl ether (400) ester may achieve 98.9%, was extremely similar to the overseas product functional group structure.

研究表明，在氢醌、甲醌复合使用或者单独使用吩噻嗪、氮氧自由基哌啶酮作阻聚剂，对甲苯磺酸作酯化催化剂、甲苯作回流带水的条件下、酸醇比为1.5时，合成的甲基丙烯酸聚乙二醇单甲醚(400)酯产率可以达到98.9%，与国外产品官能团结构十分相似。

The better technology has been obtained: taking water-EG as solvent 2-imidazolidinone was prepared. The molar ratio of the methanal (36%) to the formic acid (85%) is 1:2.8, reaction temperature is 95~100℃, reaction time is 16 h, taking cuprous chloride and triethylamine as catalyst, the molar ratio of the cuprous chloride and triethylamin to 2-imidazolidinone is 1.0% while 1,3-DMI was prepared.

较佳工艺条件为：制备2-咪唑啉酮时，以水－乙二醇混合作溶剂；制备1，3-DMI时，甲醛(36%)：甲酸(85%)摩尔比为1：2.8，反应温度95~100℃，反应时间16 h，氯化亚铜和三乙胺作催化剂，用量分别是2-咪唑啉酮摩尔数的1.0%。

ABSTRACT Immobilized penicillin acylase (from E.coli) was used to catalyze 7 phenylacetamido 3 E propenyl cephalosporanic acid hydrolyzation into 7 amino 3 E propenyl cephalosporanic acid. Then, trans APRA was acylated with hydroxyethyl ester of 4 hydroxy D phenylglycine to obtain trans cefprozil.

以7 苯乙酰氨基 3 E 丙烯基 3 头孢菌素 4 羧酸为原料，在青霉素酰化酶作用下，首先酶法水解得到3 E 丙烯基 3 头孢菌素 4 羧酸，过滤固相酶，滤液调pH分离得到反式APRA固体；在青霉素酰化酶作用下，反式APRA再与对羟基苯甘氨酸乙二醇酯缩合，得到反式头孢丙烯；酶法合成所得的产品与进口反式头孢丙烯对照品一致。

Tergitol or PEG (0.5 g) was added to 10 mL of a 20% solution of alkyl halide in phenylacetonitrile, and then this solution was added to 10 mL of 60% aqueous potassium hydroxide.

Tergitol或聚乙二醇（ 0.5 g ）项增加了10毫升的 20 ％的溶液中苯乙腈烷基卤化物，和那么这个解决办法是增加了10毫升的60 ％水氢氧化钾。

Mainly using protein - film voltammetric technique, we have achieved direct electrochemical response of lots of proteins such as hemoglobin, myoglobin, cytocrome c, cytocrome b5, horseradish peroxiase, GOD ,Vitreoscillia sp. haemoglobin, etc., at a series of protein membrane modified electrodes, for instance, protein/kieselgubr, protein/polyethylene glycol, protein/polyethyleneimine, protein/phosphatidylcholine, protein/DNA, protein/montmorillonite/polyvinyl alcohol, protein/silver nanoparticle/ cysteamine membrane modified electrode, etc., which are prepared by casting, incorperating or layer by layer self-assembly methods. Electrochemical behavior of these proteins in the films have been studied, and their structural and conformational changes have also been examined with spectrometric techniques.

三年来，在基金委的支持下，我们以蛋白膜伏安法这一新技术作为主要的研究手段，并结合其他生物、化学技术，研究了血红蛋白、肌红蛋白、细胞色素C、细胞色素b5、辣根过氧化物酶、葡萄糖氧化酶以及好氧革兰式阴性菌透明颤菌中的血红素类蛋白等多种蛋白质在以涂布和自组装方法制成的蛋白质/硅藻土膜、蛋白质/聚乙二醇膜、蛋白质/卵磷脂膜、蛋白质/聚乙烯亚胺膜、蛋白质/蒙托石/聚乙烯醇自组装膜以及蛋白质/银胶/半胱胺自组装膜等修饰电极上的直接电化学行为，结合各种光谱技术，对蛋白质在膜中的构象进行表征，探索其电子传递机理。

Three methods are used to prepare molecular imprinted polymers,which include conventional bulk technique or polymerization with ultraviolet initiated in low temperature and polymerization with silica-gel as sacrificial materials. In the polymerization procedure , Sulfamethazine(SM2)and Sulfisoxazole were used as target template molecules, methacrylic acid and 4-vinylpyridine(4-VP) and acrylamide were selected as functional monomers, ethylene glycol dimethacrylate as crosslinker, azobisisobutyronitrile was used as initator.

主要工作如下：首先，以磺胺异噁唑和磺胺二甲嘧啶为模板，分别以4-乙烯基吡啶，甲基丙烯酸，丙烯酰胺为功能单体，以二甲基丙烯酸乙二醇酯为交联剂，偶氮二异丁腈为引发剂，采用了传统方法(60℃恒温水浴)、牺牲硅胶法及低温紫外光聚合法等三种方法合成了一系列的磺胺类药物印迹聚合物。

The porous SiO2 xerogels with controlled structure were obtained from TEOS in the presence of PEG by sol-gel method.

采用溶胶-凝胶法，以正硅酸乙酯为前驱体，以不同分子量的聚乙二醇为改性剂，制备结构可控的多孔SiO2干凝胶。

Good yield of the pure monomer bis(2-hydroxyethylene terephthalate) was obtained.

良好的收益率的纯单体二（ 2 - hydroxyethylene对苯二甲酸乙二醇酯）获得。

A series of methyl 2,7,7-trimethyl-5-oxo-4-aryl1,4,5,6,7,8- hexahydroquinoline -3-carboxylate were synthesized by the reaction of aromatic aldehydes,dimedone and methyl acetoacetate using ammonium acetate as catalyst in glycol under microwave irradiation with 82%～98% yields in 4～6 min.

微波辐射下以芳醛、达咪酮、乙酰乙酸甲酯为原料，乙二醇为溶剂，醋酸铵为催化剂合成了一系列2，7，7-三甲基-5-氧代-4-芳基-1，4，5，6，7，8-六氢喹啉-3-羧酸甲酯化合物，反应时间4~6 min，产率82%~98%。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。