缩合,condensation
1)condensation[英][,k?nden"se??n][美]["kɑnd?n"se??n]缩合
1.The application of 1,3-dicyclohexylcarbodiimide(DCC) used ascondensation agent in organic synthesis;缩合剂1,3-二环己基碳二亚胺(DCC)在有机合成中的应用
2.Condensation of Benzaldehyde and Methanol Catalyzed by Niobic Acid;铌酸催化的苯甲醛与甲醇缩合反应
3.Effect of solvent on diazinoncondensation;溶剂对二嗪磷缩合过程的影响
英文短句/例句
1.intermolecular condensation分子间缩合[作用]
2.ethylene oxide condensate emulsifier环氧乙烷缩合乳化剂
3.This is a fix-price contract with escalation.这是一份标价伸缩合同。
4.Scratch the subject of defence and acronym, abbreviation, and buzzwords fly out.话题触及国防，缩合字，缩写字和行话就满天飞。
5.Scr mah the subject of defence and acronym, abbreviation, and buzzwords fly out话题触及国防,缩合字,缩写字和行话就满天飞
6.A Scan and Focus of Change of Meaning of English and Chinese Contraction Abbreviations Based on the Theory of Lexicalization词汇化观照下的英汉缩合法缩略语语义嬗变
pounding Agent of RTV Silicone Rubber of Condensed Type(Ⅰ)缩合型室温硫化硅橡胶的配合剂(一)
8.The Preparation and Analysis of New Condensation Silicone Rubber Impression Material;缩合型硅橡胶印模材料的合成与分析
9.Investigation on Hydrolysis of Trialkoxysilane and Their Condensation Polymers;三烷氧基硅烷水解及缩合聚合物研究
10.Four coupling reagents for synthesis of N-methyldipeptide四种缩合试剂对含N-Me二肽的合成
11.To make(a solution or mixture) less dilute.浓缩浓缩（溶液或混合物）
pressive shrinkage range机械预缩机组,机械防缩联合机
bination type milling machine联合缩绒机（精练与缩绒同时进行 ）
14.and gas in outer space.和气体收缩聚合而成。
15.continuous shrinking and bulking range连续收缩膨化联合机
16.continuous shrinking and drying range连续收缩烘燥联合机
17.polyvinyl butyral cementing agent聚乙烯醇缩丁醛粘合剂
18.resection of coarctation of aorta with anastomosis主动脉缩窄切除吻合术
相关短句/例句
condensation reaction缩合
1.A monomer of polyimide 2,2′-bis[4-(3-aminophenoxy)phenyl]propane was prepared from m-dinitrobenzene and bisphenol A throughcondensation reaction and hydrazine hydrate reduction with an overall yield of 85.提出了以间二硝基苯和双酚A为原料经缩合和水合肼催化还原合成聚酰亚胺的单体2,2′-双[4-(3-氨基苯氧基)苯基]丙烷的新工艺,考察了各类工艺条件对目标产物收率的影响,得到最适宜反应条件,在优化条件下,总收率为85。
2.This paper researched thecondensation reaction of 2-metylbenzimidazole and 2-methylbenzothio-zole with aromatic aldehyde in acetic anhydride to form 2-(benzimidazol-2-yl)-1-aryl-ethylene derivatives or 2-(benzothiozol-2-yl)-1-aryl-ethylene derivatives.本文研究了2-甲基苯并咪唑和2-甲基苯并噻唑衍生物,在乙酸酐中与芳香醛缩合形成2-(2-苯并咪唑基)-1-芳基乙烯类或2-(2-苯并噻唑基)-1-芳基乙烯类化合物。
3.The experiments show that thecondensation reaction doesn"t take place without ultrasonic irradiation, otherwise with ultrasonic irriation the reaction not phly occurs in ordinary condition but also good result was obtained.本文采用超声辐射法合成了N—苯基间氯苯胺,考察了反应条件对缩合反应的影响。
3)shrink synthesis缩合
4)condensation polymerization缩合聚合
1.Chemical synthesis methods(condensation polymerization and ring-opening polymerization), structures and properties of poly(lactic acid), especial poly(L-lactic acid) in rencent years are briefly reviewed.简述了近年来聚乳酸(PLA)尤其是聚左旋乳酸(PLLA)的化学合成方法(缩合聚合和开环聚合)及其结构与性能,并对这类材料的应用和发展作了展望。
2.In this paper the equilibrium process of closed system and the equilibrium move of opened system incondensation polymerization were investigated.研究了缩合聚合反应封闭体系的平衡过程和开放体系的平衡移动 ,研究了小分子放出对平衡移动的驱动作用 ,探讨了这种驱动作用的热力学意义 ,提出了自由能守恒的概念 。
3.The PF resins were prepared bycondensation polymerization,and the magnetic PF microspheres are synthesized by codeposition.运用缩合聚合法制备出PF凝胶,并在此基础上以共沉淀法合成出磁性PF微球。
5)Polycondensation[,p?lik?nden"sei??n]缩合聚合
6)condensation[英][,k?nden"se??n][美]["kɑnd?n"se??n]缩合反应
1.Studies on the Condensation Reaction of α,α-Diacetyl KeteneDithioacetals with Arylaldehydes;α,α-二乙酰基二硫缩烯酮和芳醛的缩合反应研究
2.Self-condensation of n-Butyraldehyde Catalyzed by Solid Base Prepared with Microwave Irradiation;微波法制备的固体碱催化丁醛自缩合反应
3.A study oncondensation reaction of cyclohexanone catalyzed bydealuminated USY;脱铝超稳Y催化环己酮缩合反应的研究
延伸阅读
缩合两个相同分子或不同分子之间形成一个新键的反应过程。过程中常放出NH3、H2O、HCl等简单分子(但也有不放出的，如醇-醛缩合)。反应所用的催化剂通常为酸、碱、氰化物离子或络合金属离子。两个相同分子之间的缩合反应称自缩合反应，例如几个分子相同的醛、酮、酯和胺之间发生自缩合，它们大多数形成有机合成的中间物（除胺外）。醛和酸酐、酰氯和胺等之间也能进行缩合反应结果形成相应的羧酸和酰胺等一系列产品。工业上重要者有以下三类：醛-醛缩合 相同的醛或不同的醛在稀碱液的催化作用下可生成β-羟基醛，例如： CH3CHO+CH3CHO─→CH3CHOHCH2CHOβ－羟基醛若加氢可得1，3-二醇，若脱水可得α、β－烯醛，再加氢得醛或醇。例如：从乙醛可得丁醛和正丁醇，从丁醛可得2－乙基己醇。醛-酐缩合 苯甲醛与醋酐在无水醋酸钠的催化作用下加热进行缩合-脱水得β－苯基丙烯酸（月桂酸）： 类似地，水杨醛与醋酐缩合、脱水、内酯化，可得香豆素。 酯-酯缩合 通过酯－酯缩合可得一系列β－酮酸酯。例如两分子醋酸乙酯在乙醇钠的催化作用下脱醇缩合得乙酰乙酸乙酯：CH3COOC2H5+HCH2COOC2H5CH3COCH2COOC2H5+C2H5OH若起始的分子含有两个官能团（例如α，ω二酸或二胺），分子间发生多次缩合，又称缩聚（见聚合）。
