查询词典 nitro-pentaerythrite

It's found that the aromatic dinitro compounds can be monoreduced to nitroanilines in high selectivity, aromatic nitro compound s and muti.

本文旨在探索一种具有先进性和创造性的催化方法，利用一氧化碳在温和的条件下高选择性地还原芳香硝基化合物制备芳胺。

Prolonging nitration time and increasing reaction temperature would promote the formation of dinitro products while shortening the nitration time and decreasing reaction temperature would promote the formation of mono-nitro products.

延长反应时间和提高反应温度有利于二硝化产物的形成，缩短反应时间和降低反应温度有利于单硝化产物的形成。

Aromatic dinitro compounds were reduced irrespective of the presence or absence of β-CD in sodium hydroxide solution, which revealed particularity of aromatic dinitro compounds.These reactions have advantages below over past research results of aromatic nitro compounds:(1) The synthetic method using water as the reaction medium may

这些反应与过去人们对硝基化合物反应的研究结果相比，具有以下优点：(1)反应在水介质中进行，避免使用辅助有机溶剂和金属催化剂，是环境友好的清洁反应，比较符合绿色化学的发展要求；(2)反应中所用的β-环糊精无毒，价廉，易得

The oxidation of p-nitrotoluene-2-sulfonic acid to prepare 4, 4'-dinitrostilbene-2, 2'-disulfonic acid was monitored, and the mechanism for the formation of by-products 4-nitrobenzaldehyde-2-sulfonic acid and 4-nitro-2-sulfobenzonic acid was suggested.

跟踪了对硝基甲苯邻磺酸制备4，4'-二硝基二苯乙烯－2，2'-二磺酸的过程，推测了4-硝基苯甲醛2-磺酸钠与4-硝基苯甲酸2-磺酸钠杂质的生成机理。

Nitro-compound such as sodium nitroprusside is used as donor of ectogenic NO in the study.

研究外源性NO对NSCs的调控作用常用硝普钠等硝基化合物作为供体。

The experiments showed that the mixture of H2O2 and Na2WO4 or (NH4)2S2O8 in CH3SO3H media is a new kind of efficient oxidant for the synthesis of one or more furazan rings with amino and nitro groups.

研究表明甲烷磺酸/过氧化氢/碱或碱土金属和胺为基的氧化物混合物是制备同时含有氨基和硝基基团的系列呋咱化合物非常有效的氧化体系。

Novel phosphazene cyclomatrix network polymers were synthesized via nucleophilic displacement of activated nitro groups of tri (4-nitrophenoxy)tri cyclotriphosphazene and hexa cyclotriphosphazene with the hydroxyls of bisphenol A.

以三对硝基苯氧基三苯氧基环三膦腈和六对硝基苯氧基环三膦腈为主要单体，采用活性硝基亲核取代的方法，合成了一类新的环簇膦腈聚合物。

Novel phosphazene cyclomatrix network polymers were synthesized via nucleophilic displacement of activated nitro groups of tri (4-nitrophenoxy) tri cyclotriphosphazene and hexa (p-nitrophenoxy) cyclotriphosphazene with the hydroxyls of bisphenol A.

以三对硝基苯氧基三苯氧基环三膦腈和六对硝基苯氧基环三膦腈为主要单体，采用活性硝基亲核取代的方法，合成了一类新的环簇膦腈聚合物。

Objective:To examine the effects of acute or chronic administration of 7-nitro indazole (7-NI) on the MAC of sevoflurane and cerebellar cGMP levels in mice.

目的：应用神经型NO合成酶抑制剂7-硝基吲唑(7－NI)，观察急、慢性用药对七氟醚 MAC及小鼠小脑cGMP的影响。

In part Ⅱ, electrophilic substitution reaction of indoles with aldehydes, ketones and 6-Nitro-vinyl catalyzed by dodecylbenzencsulfonic acid in water were studied in detailed.

本文第二部分详细研究了十二烷基苯磺酸水相催化吲哚与醛、酮和硝基烯的反应。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。