乙酰基

Polyethersulfone with cardo was a developed engineering thermoplastic and membrane material with high glass transition temperature,PES-C ultrafiltration membranes were prepared by phase inversion method using dimethylacetamide as solvent and oxalic acid and polyethylene glycol as additives.The membrane morphology forming and evolution could be observed by the experimental system and method.The effect of additive and polymer concentration on cast solution and the gelation kinetics of polyethersulfone with cardo asymmetric membrane were studied.

采用耐高温工程塑料——含酚酞侧基的聚芳醚砜为膜材料，草酸和聚乙二醇为添加剂， N，N -二甲基乙酰胺为溶剂，并利用改进的凝胶动力学实验装置和方法，使之能真实地再现不同膜孔结构生长及发展演化的过程，借助相关软件对图像进行处理，考察了添加剂、聚合物浓度对铸膜液凝胶速度的影响，对酚酞基聚芳醚砜非对称膜的凝胶过程的动力学进行研究。

From 3-chloropropene bycondensation with sodium ethylate in ethanol to form 3-ethoxypropene followed by anti-Markovnikov addition with HBr inthe presence of benzoyl peroxide.

3-氯丙烯与乙醇钠在乙醇中回流制得3-乙氧基丙烯，继而在过氧苯甲酰存在下，与溴化氢经反马氏加成制得1-溴-3-乙氧基丙烷，总收率89。

By using the a device being similar to water segregator and by controlling the temperature, cyclization of the intermediate product in chloroform reduced carbonization and gave 2-dodecaneanthraquinane in 68.1% yielding.

以十二烷基苯和苯酐为起始原料，经酰基化、关环和磺化三步反应合成了3-十二烷基蒽醌磺酸；并进一步改进和优化了合成工艺条件：即在催化剂三氯化铝过量50%并有三乙胺存在的条件下，中间体2-（4-十二烷基苯甲酰基）苯甲酸收率为72.45%；关环反应采用氯仿作溶剂，利用类似分水器的装置有效控制反应温度以减少碳化，2-十二烷基蒽醌的收率为68.1%。

Ascorbic acid, a well-known natural antioxidant, was successfully used to remove the sulfonyl group of α-phenylsulfonyl acetophenone derivatives by photochemical method.

抗坏血酸作为众所周知的天然抗氧化剂，在光诱导电子转移反应中被成功地运用到α-苯磺酰基苯乙酮衍生物磺酰基基团的移除反应中。

Methacryloyloxydecyl-2-thiouracil-5-carboxylate was synthesized from the reaction of thiouracil with diethyl ethoxymethylene malonate and ω-hydroxy-decyl-methacrylate.

以硫脲、乙氧基次甲基丙二酸二乙酯和甲基丙烯酸ω-羟癸酯为主要原料合成了一种新的粘接性单体10-甲基丙烯酰氧癸基－2-硫脲嘧啶－5-羧酸酯。

A set of laser monitoring observation system to be used for measure the solubility with a high speed, which is programmed heating apparatus , have designed. The solubility of 1,2-cyclohexanediol were measured in water, methyl acetate, acetic ester, propyl acetate, butyl acetate, methyl acrylate, ethyl acrylate, acetoacetic ester at different temperature.

另外，还建立了一套带激光监视系统，可以控制升温速率的溶解度测定实验装置，测定了反式-1，2-环己二醇在水、乙酸甲酯、乙酸乙酯、乙酸丙酯、乙酸丁酯、乙酰乙酸乙酯、丙烯酸甲酯、丙烯酸乙酯和甲基丙基酮等9个二元体系中的溶解度。

The condensation of aromatic aldehydes with active methylene compounds like malononitrile, cyanoacetamide and ethyl cyanoacetate has been found to proceed very efficiently at room temperature giving excellent yields, but the condensation of heteroaromatic,α,β-unsaturated and aliphatic aldehydes with active methylene compounds proceeded smoothly in 50~65℃ with good yields and the reactions of aromatic, aliphatic ketones as well as p-phthalaldehyde with malononitrile also proceeded in 75~85℃ with moderate yields.

芳香醛与活泼亚甲基化合物如丙二腈、氰基乙酸乙酯、氰基乙酰胺的缩合在室温下即能顺利进行，获得了很高的收率；而对于杂环芳醛、α，β-不饱和的醛以及脂肪醛与活泼亚甲基化合物的缩合，需在50~65℃下进行，也取得了很高的收率；对于脂肪酮、芳香酮以及二元醛与丙二腈的缩合在75~85℃下也能顺利地进行，获得中等以上的收率。

In this paper several methods including acylamide dehydration, metal cyanide replacement, etherification and isoxazole method for synthesis of 3,3-diethoxyethylcyanide were reviewed.

综述了3，3-二乙氧基丙腈的合成方法，包括酰胺脱水、金属氰化物取代、醚化和异恶唑法，用于工业化生产较为满意的合成路线是以1，1，3，3-四乙氧基丙烷为原料的异恶唑法。

A series of pH- and temperature-sensitive hydrogels carrying pendant phosphategroups have been synthesized by copolymerizing 2-methacryloyloxyethyl dihydrogenphosphate with N-isopropylacrylamide. The swelling ratio, swelling and deswellingkinetics have been investigated. High loading percentage of lysozyme into hydrogelshas been achieved and the release profile has been studied.

通过N-异丙基丙烯酰胺和含磷酸基团的单体2-甲基丙烯酰乙氧基二氢磷酸酯的共聚合，合成了一类含磷酸基团的既对温度敏感又对pH敏感的水凝胶，研究了它们在不同pH及温度时的溶胀率及溶胀动力学，并初步研究了其对溶菌酶的释放行为。

Part I, the Friedel-Crafts acylation on DAA and methyl dehydroabietic acid was carried out with acetyl chloride, benzoyl chloride or phthalic anhydride as acylating regents, anh- ydrous aluminum chloride as catalyst and with different solvents to compare with, we have got t- hree new compounds.

第一部分，分别以脱氢松香酸和脱氢松香酸甲酯为底物，乙酰氯、苯甲酰氯、邻苯二甲酸酐为酰化试剂，无水三氯化铝作催化剂，采用不同的溶剂及反应条件进行傅克酰基化反应，得到3个新化合物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。