反应的
- 与 反应的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Originally limited to dialkylamino methylenation, the application of Mannich reaction has been expanded much further in recent years to a wide variety of monosubstituted amines, amine equivalents and amides. In addition, a variety of Aza-Mannich and Mannich-Michael methodologies have emerged.
最初该反应的应用范围仅局限于二烷基胺亚甲基化反应,近年来才得到了长足的发展,其研究范围扩展到单取代的胺、胺的类似物以及酰胺等化合物,并发展形成Aza-Mannich和Mannich-Michael等复合Mannich反应。
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The same methods were used to study toluene dinitration, and the results indicated that the thermal runaway risks of these reactions were low too; prolonging dosing duration was helpful to the conversion of all nitrotoluene; decreasing the molar ratio of nitric acid to mononitrotoluene would make an insufficient conversion; among the given temperatures, rising reaction temperature couldn\'t markedly change the yield coefficient, but lead more heat generation and higher thermal runaway risk.
采用同样的方法对二段硝化反应进行研究,结果表明:二段硝化反应的热失控危险性也较低;延长加料时间,有利于反应完全;而随着硝酸与一硝基甲苯摩尔比的减小,硝化难以进行完全;在选定温度范围内升高温度,产物得率无显著变化,反而易导致放热加剧,增加体系的热失控危险。
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Thepotential energy surface of these reactions were plotted, and the energy barrier of the reaction between THF and secondary oxonium ion was determined to be 182.0.116 kJ/mol.
本文进一步对四氢呋喃阳离子开环聚合反应过程中,氧鎓离子与水反应的机理进行了分析。
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The appropriate conditions of polyaminating reaction was that oxycellulose chloride in 200mL DMSO was heated to 100℃with stirring,then was dropwised 10mL A2.3 and A3.4 separately,remaining the temperature for 12h,after pH was justed to 4-5,the products were obtained in 46%yield.
确定多胺化反应的较佳条件:在200mL DMSO搅拌加热至100℃,滴加A2.3和A3.4各10mL,维持温度反应12h,在酸性条件(pH:4-5)下生成,产率大约在46%左右。
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At the same time, we found that the aggravation of patients' jointpain was correlate with the enhancement of lipid peroxidate reaction when the weather changed bed.
提示机体脂质过氧化物反应增强可能是气象变化引起某些RA息者出现关节不舒或疼痛加重反应的主要因素之一。
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Their photostability were determined in DMF solutions under li...
在实验时间范围内,其光褪色反应遵循一级反应的规律,且光褪色速度很小。
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Objective] The experiment aimed to determine the optimum ISSR-PCR reaction system of Picea crassifolia kom..
[目的]确定适应青海云杉ISSR-PCR反应的最佳反应体系。
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Now, a convenient, efficient pinacol coupling of aldehydes mediated by zinc in good yields has been carried out in ammonia water in the presence of a little crown ether. Adding a small amount of crown ether was highly effective to enhance the yields of pinacol from 63% to 84%.
本文报道一种简便、有效的水相呐偶合反应,它是在含有少量冠醚的稀氨水溶液中,使用锌粉促进醛基化合物进行水相呐偶合反应,其中加入少量的冠醚有助于提高反应的产率,呐醇产率由63%提高到84%。
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Nevertheless, the yield of pinacol was also strongly affected by the steric environment surrounding the carbonyl group. The pinacol coupling of aromatic aldehydes has been achieved with high yields under such a condition. However, the diastereose-lectivities of pinacols were not satisfying. Unfortunately, the ketones and most aliphatic aldehydes appeared inert under the same reaction conditions.
然而, 呐偶合反应的产率受到羰基周围环境的立体位阻影响较大,在此条件下,锌粉能有效地促进芳香族醛类化合物进行水相呐偶合反应,得到的呐醇产率高,但非对映异构体选择性差,而脂肪族醛类化合物得到的呐醇产率较低,在同样的条件下,酮类化合物不能顺利进行呐偶合反应。
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Preliminary Study on Enzymatic Modification of Protein──Study on Plastein Reaction of Soybean Protein with Sesame Protein;2. Utilizing alkaline hydrolysate of rice protein as substrate,the effect of plastein reaction condition on the yield of plastein was studied.
以大米蛋白的碱性蛋白酶水解产物为原料,研究了反应条件对类蛋白反应产率的影响,采用正交试验优化了类蛋白反应的条件,并分析了最佳条件下类蛋白的氨基酸组成。
- 推荐网络例句
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She gently rebuff ed him, but agreed that they could be friends
她婉言拒绝了,但同意作为朋友相处。
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If in the penal farm, you were sure to be criticized.
要是在劳改农场,你等着挨绳子吧!
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Several theories about reigniting and extinguishing of the arc have been refered.
本文综合考虑了几种电弧重燃和熄灭理论。