查询词典 nitration

Yield of nitrated porphyrins vibrated fiercely with different concentrations of nitric acid. It was found that nitration with 80% nitric acid (w/w, d = 1.45) could afford over 90% yield of mono nitrated TPP.

不同浓度的硝酸对硝化产物收率有较大的影响，论文首次以80%的硝酸为硝化试剂，适当条件下获得了收率超过90%的单硝化产物。

To determine whether nitration of Trx may alter its cardioprotective effect,adult mice were subjected to 30 minutes myocardial ischemia and 3 hours or 24 hours of reperfusion and treated with vehicle, native or nitrated human Trx1 (10 min before reperfusion).

为进一步确定TRX硝化是否改变其心肌保护作用，采用缺血30 min，再灌注3 h或24h小鼠缺血/再灌注模型，分别于再灌前10 min给予磷酸盐缓冲液，TRX或硝化TRX。

Toluene nitration was carried out with supported heteropolyacids as catalysts and N2O5 as nitrating agent.

用负载型杂多酸为催化剂，N2O5为硝化剂的新型硝化体系，对甲苯的硝化反应进行研究。

In this paper, the latest progress of the nitration of deactivated aromatic compounds is reviewed in the point of view of nitrating agents, including nitrate-sulfuric acid, nitrate ester, nitric acid and nitrogen oxides.

本文从硝化试剂角度综述了近年来钝化芳环的硝化反应的进展，包括硝酸盐/硫酸、硝酸酯、硝酸、氮氧化物等硝化方法。

The distillation-nitration method is a new process for nitrating toluenc toTNT.

引言 TNT是近代军事上应用最广泛的猛炸药之一。

Among them, nitrate-sulfuric acid system with higher nitrating activity can get high yields at mild condition in the nitration of deactivated aromatic compounds and could be used in the laboratory and industrial applications.

其中，硝酸盐/硫酸体系具有较强的硝化能力，对于钝化芳环，可以在温和条件下以高收率得到硝化产物，在实验室制备或工业应用中具有较高的应用价值；其他硝化方法由于各种原因暂时不能对钝化程度较高的芳环进行硝化，还需进一步研究具有较高活性的硝化体系。

The ring-open nitration of propylene oxide compounds was investigated using dinitrogen pentoxide as nitrating agent.

并以N2O5为硝化剂考察了环氧丙烷类化合物开环硝化过程，探讨了取代基的电子效应和立体效应对环氧丙烷类化合物开环硝化过程的影响规律。

We studied the infection ofthe different reactant ratios to the degree of nitration when the polystyrere was nitrified. Thena series PS-NH_2 With different concentrations of amidocyanogen were gained by reducingPS-NO_2. At last the high active acryloylthiourea were grafted on the amidocyamogens.

在聚苯乙烯的硝化过程中，研究了不同的反应物配比对硝化度的影响，并对不同硝化度的硝基聚苯乙烯进行还原反应，得到了胺基含量不同的系列胺基聚苯乙烯，最后利用聚苯乙烯上的胺基和高活性的丙烯酰基异硫氰酸酯进行加成，合成AGPS。

Some people proposed polymerizing the glycerine prior to nitration.

有人建议在硝化之前，把甘油聚合。

At last, Hartree-Fock and Density Functional Theory was used to calculate the Mulliken bond orders, HOMO and LUMO. The "principle of the smallest bond order" and the "principle of the easiest transition" were selected to judge the decomposition potential of the nitration products, and the results indicated trinitrotoluene would decompose easier than other product, and it was consistent with the experimental results.

最后，采用Hartree-Fock方法和密度泛函方法计算了各硝化反应中主要有机物的Mulliken键级、最高占有轨道能和最低空轨道能，采用&最小键级原理&和&最易跃迁原理&判断出三硝基甲苯最易分解，这与实验结果一致。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。