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Polyimide/nano carborundum composite films were made from pyromellitic dianhydride、4, 4'-aminodiphenyl ether、N, N'-dimethyl acetamide and nanometer carborundum.

以均苯四甲酸二酐、4,4'-二氨基二苯醚、N,N'-二甲基乙酰胺为原料,经化学合成反应制备了聚酰亚胺/纳米碳化硅复合薄膜。

The result indicated that the reacting mixture containing dioxane 11.3mL/g HDCA which had been added ethyl chloroformate drop wise should be keep at 10℃ for 30min, then, rising to 15℃ for another 20min in the step of forming mixed anhydride ,and 1.5mol/L NaOH was used to dissolve taurine before aminolysis, and crude product was recrystalled by acetone in purifying process.

结果表明,形成混酐时,二氧六环用量为11.3ml/g HDCA,滴加氯甲酸乙酯后先在10℃反应30min,再在15℃下反应20min;用1.5mol/L的NaOH水溶液溶解牛磺酸后再进行氨解;粗产品用丙酮重结晶。

Based on the problem of various types of catalyst and according to the features of carbonylation catalysts reactions, our team has been designed a series of new metal complexes of benimidazoles, which can be used for carbonylation catalyst of industry. Seven new benzimidazole derivatives were prepared by the o-phenylenediamine、oxalic acid、glycolic acid、monomethyl monopotassium malonate、ethyl cyanoacetate、succinic anhydride. The structures of them were confirmed by IR、Elemental analsis. The crystal structures of d and e were determined by X-ray single crystal diffraction of Germanic Bruker Smart APEX II CCD. The catalysis of them was tested by carbonylation reactions.

本文设计以邻苯二胺和草酸、羟基乙酸、丙二酸单甲酯、氰基乙酸乙酯、丁二酸单甲酯为原料采用PPA催化和无机酸催化法,合成了4种苯并咪唑-2-羧酸衍生物并进行了表征;培养了2个化合物d、e的晶体并测定和讨论了晶体结构;制备了3种未见报道的苯并咪唑金属配合物,对配合物在羰基化法制醋酐-醋酸反应的催化作用进行了初步试验。

Results CsA clearly decreased creatinine clearance and increased urinary excretion of N-acetyl-β-D-glucosaminidase in rats as compared with those in the vehicle group. Morphologic changes consisted of vacuolization of tubular cell, expansion of the interstitium and interstitial fibrosis, hyalinization of afferent arterioles. Severity of the injury was related to the dosage of CsA. Striped interstitial fibrosis and arteriolopathy were more severe in the rats treated with CsA and low-salt diet than with CsA and normal diet.

结果 用CsA的大鼠出现尿量增多、内生肌酐清除率下降、尿N-乙酰-β-D-氨基葡萄糖苷酶排泄增多等;病理上表现为不同程度的细胞浊肿、空泡变性及灶性分布的间质纤维化和小动脉病变,随CsA剂量的增加,病变呈加重趋势;结合低钠饮食,CsA慢性肾毒性病变明显加重。

Single-crystal X-ray diffraction analysis of 3, 3'-BTDA and 3, 4'-BTDA showed that they both have bent and noncoplanar structures.

发现螺双内酯在乙酸酐中回流可以直接有效地转化成二酐3,3'-BTDA,并提出了转化机制。

Polyimide/silica (PI/SiO2) nano-hybrid films of different solid content were prepared based on pyromellitic dianhydride and 4, 4'-oxydianiline using tetraethoxysilane as the inorganic precursors.

以均苯四甲酸二酐和4,4'-二氨基二苯醚为有机单体,正硅酸乙酯为无机前驱体,制备了SiO2含量一定,PAA杂化胶液固体含量不同的PI/SiO2纳米杂化薄膜。

Methods High, moderate and low dose of adenine and ethambutol were used to Wistar rats. Concentration of serum uric acid and urine nitrogen and creatinine was measured before and after treatment.

方法采用腺嘌呤加乙胺丁醇给高、中、低3个剂量组灌胃,测定实验前后大鼠血清尿酸、尿素氮、肌酐,行肾组织病理与超微病理观察。

The polyesters are obtained by the polymerization of maleic anhydride and polyethylene glycols.

多元酯被 maleic 醋酐和聚乙烯乙二醇的聚合获得。

Several glycosyl phosphate and phosphonates, as inhibitors of AGPase, were synthesized.In the synthesis of β〓-6 linked oligosaccharide phosphonates, A new method was developedfor preparation of 〓,6-〓-di-acetyl-2,3,4-〓-tri-benzyl-D-hexoses by acetylation of benzylatedmethyl glycosides in high yield under the conditions of 〓 and cat.〓.

合成了一些磷酸酯及其类似物作为嗜热AGPase的抑制剂,在研究β 1-6连接的寡糖膦酸酯的合成中,发现了制备1,6-〓-二乙酰基-苄基保护糖的新方法:苄基保护的糖苷在醋酐和催化量的硫酸作用下,在0℃反应进行7-10 min,可以选择性、高收率地得到此化合物。

In addition, TMA also can be used for thermoset polyester powder coating resin and epoxy resin crosslinking agent, can be used for dispersion carbamate acetate polyester in its ambient temperature of 70 , the nature of stability and with a high gloss, quick-drying, wear and many other features.

另外,偏酐还可以作热固性粉末涂料聚脂树脂和环氧树脂的交联剂,可用于分散性氨基甲酸乙脂聚脂中,使其在环境温度为70℃时,性质稳定,并具有高光泽度、快干、耐磨等多种特性。

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