二羧酸

Naphthalene superplasticizer compared with other second-generation, thellord-generation POLYCARBOXYLIC superplasticizer With the improvement of quality of performance and quality.

与萘系品级二代减水剂比拟，第三代聚羧酸系高效减水剂的机能与质量有了质的提高，基本能够餍足高机能混凝土对于减水剂的机能要求，该类产物基本具有了代替萘系减水剂的技术机能优势与经济前提。

The fluorescence spectra of 4- 5 '-p-biphenylyloxadiazolyl-2' benzyl ω-p-biphenylyl polymethylene car-boxylate have been determined. The results of experi-ment show that they can form not only intramolecularexciplex but also intermolecular excimer and triplex.

测定了ω-对联苯基多亚甲基羧酸4-[5'-对联苯基〓二唑-2']苄酯的荧光发射光谱，从实验结果得到，它们不但可以形成分子内激基复合物，而且可以形成分子间激基缔合物和三分子激基复合物。

This paper introduced the method that the thiabendazole was synthesized by polyphosphoric acid as solvent.

介绍多聚磷酸作为 4 羧酸噻唑与邻苯二胺溶剂兼脱水剂，合成噻苯咪唑———食品保鲜剂的方法。

A series of 2-substituted benzimidazoles were synthesized by the reaction of o-phenylenediamine with corresponding acid in polyphosphoric acid under microwave. 11 Compounds were synthesized in this way first time.

以邻苯二胺及相应的羧酸为原料，微波辐射下，合成了18种2-取代苯并咪唑衍生物，其中11种化合物的微波合成未见文献报道，研究并优化了反应条件。

The design, synthesis of crosslinked poly-salenCo complexes and their application in the HKR of terminal epoxides Di-salicylaldehydcs and tri-salicylaldchydes S-3, S-4, S-5 were synthesized from some easily prepared acids. The crosslinked polymeric ligands could be prepared by condensation of -1, 2-cyclohexanediamine stoichiometrically with a mixture of S-3 and S-4 in different proportions, polymeric catalysts were obtained by inserting the Co atoms to the ligands.

四 交联poly-salenCo络合物的设计合成及其在末端环氧化合物的HKR中的应用以几种易得的羧酸为骨架，设计合成出了相应的双水杨醛和三水杨醛S-3、S-4、S-5，将双水杨醛S-3和三水杨醛S-4按不同比例混合后再与手性环己二胺缩合制备出交联聚合物配体，该配体与Co络合后得到交联聚合物催化剂。

A series of ABEPS were synthesized from long chain fatty acids, benzene, polyglycol and 1, 3-propane sultone by the procedure of Friedel-Crafts acylation, Huang-Minlon reduction, Williamson and sulfonation reaction, and these compounds had never been reported in the past time.

以长链羧酸、苯、多缩乙二醇和丙烷磺内酯为初始原料，依次经Friedel-Crafts酰基化反应、Huang-Minlon还原、Blank反应、Williamson成醚以及磺化反应等过程，合成了系列未见报道的ABEPS。

We have theoretically studied on the geometrical structure, electronic structure, one-photon absorption and two-photon absorption properties of perylene tetracarboxylic derivatives by using DFT and ZINDO methods.

用密度泛涵方法和ZINDO方法，从理论上研究了一系列四羧酸二萘嵌苯的衍生物。对其平衡几何、电子结构和单双光子吸收性质进行了详细的计算研究。

The result of potassium malonyloxyborohydride as a new hydroboration reagent reacts with terminal alkenes and alkynes is described.

介绍新的硼氢化试剂丙二酰氧基硼氢化钾与链端烯炔烃的作用，烯烃的硼氢化物在PTC条件下，插入∶CCl2 ，可得饱和羧酸；炔烃则难以与之硼氢化。

Experimental results showed that aerosol created by 1,3,5-trimethylbenzene photooxidation can be classify with five distinct chemical particle classes, the predominant components of these five particles are aromatic aldehyde, phenol, nitrophenol and carboxylic acid compounds.

利用该算法对OH自由基启动1，3，5-三甲苯光氧化形成的二次有机气溶胶单粒子质谱数据进行了聚类分析，在得到的五个聚类中包含了芳香醛、酚类化合物、硝基酚和羧酸等重要的光氧化产物，为研究苯系物光氧化机理提供了新的信息。

According to the experience of the research of the indoles alkaloid, we designed a series of novel compounds which contained indoles heterocyclic as the flat aromatic group, benzyloxy substituent at indoles 6 site as the nonhydrophilic group tail, carboxylic derivatives and TZDs bioisosterism substituent at indoles 2 site or 3 site as the hydrophilic group head.

于是根据我们课题组多年来对吲哚生物碱研究的经验，我们设计了以吲哚作为中间平面芳环体系，6位连接苄氧基作为疏水尾部，2位或3位连接羧酸及其衍生物、噻唑烷二酮及其电子等排体的一系列化合物。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新