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Synthesis and Crystal Structure of One Novel Three-dimensional Supramolecular Compound [Ni(H_2O)_6] ·2·4H_2Ofum= fumarate ; hmt=hexamethylenetetramine

一种新的三维超分子化合物[Ni(H_2O)_6·]2·4H_2O的合成和晶体结构(fum=反丁烯二酸根;hmt=六次甲基四胺)英文

In order to reduce the corrosion of acidic paint stripper to aeronautical metals and provide with better anti-corrosion additive for AIL4130, TC4, LY12, and 20(superscript #) steel, a series of inhibitors and their composite were investigated. Weight loss experiment, Tafel curves measurement and SEM observation were carried out for the above metals in the formic acid solution which was normally used in the paint stripper. The experimental results indicate that the optimizing composite inhibitor consists of sodium benzoate, 2-thiourea, hexamethylenetetramine, sodium laurylsulfonate and 1, 2, 3-benzotriazole.

为降低酸性脱漆剂对飞机金属材料的腐蚀,以脱漆剂中经常使用的甲酸水溶液为研究介质,以AIL4130、TC4、LY12、20钢等材料为研究对象,通过腐蚀失重法、塔菲尔曲线测量和SEM观察,筛选出对以上各金属材料缓蚀效果较好的复配缓蚀剂体系,即苯甲酸钠、硫脲、六次甲基四胺、十二烷基磺酸钠、苯并三氮唑等缓蚀剂的优化组合。

Using inorganic aluminous salts as precursors and hexamethylenetetramine as the catalyst, alumina nanonpowder was fabricated by sol-gel procedure and then incorporated in the preparation of body batch for thickly-glazed, thin-bodied celadon wares.

以无机铝盐为先驱体,六次甲基四胺为催化剂,采用溶胶-凝胶法制备了纳米氧化铝粉体,将纳米氧化铝粉体应用于薄胎厚釉青瓷瓷胎中,研究了粉体对青瓷瓷胎的增强作用。

Fumed-silica surfaces were modified with resorcinol and hexamethylenetetramine complex, and NR/M-silica nanocomposites were prepared in mixing and curing process. Structure and properties of NR/M-silica nanocomposites were investigated by mechanical testing ,cross-linking density determination, transmission electron microscopy, differential scanning calorimetry, fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results showed that M-silica have obvious reinforcement effect on NR vulcanizate.

用间苯二酚与六亚甲基四胺络合物对气相法白炭黑进行表面改性,通过混炼和硫化制备了天然橡胶/改性气相法白炭黑(NR/M-silica)纳米复合材料,并通过力学性能测试、交联密度测定、透射电镜、差示扫描量热法、红外光谱和X射线光电子能谱等手段研究了纳米复合材料的结构和性能。

The clean synthesis of 1,6-dicarbamate hexane from dimethyl carbonate and 1,6-diamine hexane is studied.

对由1,6-己二胺和碳酸二甲酸合成1,6-六亚甲基二氨基甲酸甲酯的洁净化工艺过程进行了初步研究。

The comparisons of biochemistry between OP and OR rats The differences between OP and OR rats included not only body weight, but lipids metabolism and insulin sensitivity as well, characterized with insulin resistance, increasing in serum free fatty acids and ketone body, and hepatic TC and TG in OP rats. However, no significant differences were observed in serum TG, TC, LDL, HDL and fasting glucose between OP and OR rats.⑶Comparisons of metabolites in serum, urine and liver tissue between OP and OR rats①There were significant differences in amino acids concentration between OP and OR rats,especially in liver tissue, such as high concentrations in ketogenic and glucogenic amino acids in OP rats, suggesting differences in amino acids metabolism;② The different metabolites between OP and OR rats included increasing of various saturated fatty acids and decreasing of polyunsaturated fatty acids in OP rats;③The urinary metabolites analysis indicated that different structure or metabolism of gut microflora might exist between the two phenotypes, which probably influenced the regulation of body weight gain;④The end-products of catecholamines in urine and intermediates of krebs cycle in serum in OP rats were all up-regulated, suggesting that the activity of sympatheic nervous system and energy metabolism was higher in OP rats than OR rats.

胰岛素耐受实验和胰岛素敏感指数表明OP动物的胰岛素敏感性较OR动物下降,而OP大鼠血清中游离脂肪酸、酮体、肝脏总胆固醇和甘油三酯水平显著升高;但是,OP与OR大鼠血清中总胆固醇、甘油三酯、低密度脂蛋白、高密度脂蛋白和空腹血糖等的水平并无显著性差异;⑶肥胖易感与肥胖抵抗大鼠血清、尿液和肝脏组织提取物中代谢物的比较研究表明:①OP与OR大鼠的血清、尿液和肝组织提取物中多种氨基酸的含量存在显著差异,并以肝组织中的差异氨基酸数量为最多,包括各种生酮和生糖氨基酸水平在OP组的升高,说明氨基酸代谢的差异是两种体重表型大鼠之间存在的重要差异特征之一;②OP与OR动物肝脏和血清差异代谢物中包含多种饱和长链脂肪酸的升高如十四烷酸、十六烷酸、硬脂酸等和多不饱和脂肪酸的下降如亚油酸和花生四烯酸,说明两种体重表型动物的肝脏脂肪酸代谢存在明显差异;③长期高脂饮食喂养后,动物的尿液代谢物分析表明OP与OR动物体内的肠道菌群结构存在差异,这些菌群上的差别可能在动物体重增长的调节上产生影响;④与OR动物相比,OP动物尿液代谢物中儿茶酚胺类递质的代谢终产物如高香草酸、扁桃酸和4-羟基苯乙酸明显升高。

It was not reported on the synthesis of Glycidyl methacrylate in articles till now.

在第一步采用六次甲基四胺为环氧基开环催化剂,国内外文献至今尚无报道。

Fig.2 Cross-section of human hair stained with silver methenamine.

图2 用六亚甲四胺银染色的人发横切面。

Fig.4 Cross-section of deeply processed human hair stained with silver methenamine.

图4 用六亚甲四胺银染色法的深加工人发横切面。

By using water bath method that an aqueous solution of zinc nitrate(Zn(NO3)2·6H2O)reacted with an aqueous solution of equimolar methenamine(C6H12N4),ZnO nanomaterials with controllable morphologies are successfully prepared. The influences of solution concentration and substrates on morphology of ZnO nanomaterials are discussed.

用硝酸锌(Zn(NO3)2·6H2O)与六亚甲基四胺(C6H12N4)以等浓度配制成反应溶液,通过水浴法制备出了形貌可控的棒状ZnO纳米结构,讨论了不同反应浓度及衬底对ZnO表面形貌的影响。

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Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在,所有的孩子都要在综合学校继续学习,所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地,使人们普遍认识到发展不能以牺牲农业为代价。

Detailed Intrinsic Reaction Coordination calculations were carried out to guarantee the optimized transition-state structures being connected to the related tautomers.

同时,做了详尽的内禀反应坐标计算,以保证所得到的过渡态连接相应的始末异构体。