查询词典 nitration

By analyzing the structure of Gen, refering to the strcture of NO-NSAIDs which has the function to release NO slowly, we got a target compound by esterification and nitration reaction. The structure of this new compound was confirmed by nuclear magnetic resonance, infrared spectrum and mass spectrometry.

研究方法 1。 NO-G的结构设计、合成及鉴定分析Gen的结构，参照NO-NSAIDs的结构设计，采用化学合成的方法经酯化反应和硝基化反应得到目标化合物，通过核磁，红外和质谱分析对得到的化合物进行结构确证。

Although scientists have not previously identified the precise connection between oxidation and neurodegenerative diseases, researchers from the US department of energy's Pacific Northwest National Laboratory and UCLA's David Geffen school of medicine have found that damage is due to a byproduct of oxidisation called nitration.

尽管科学家们之前并未确定氧化和神经退化疾病的精确联系，美国能源部太平洋西北国家实验室和加州大学洛杉机分校David Geffen医学院的研究人员们已经发现细胞破坏源于一种氧化作用的副产品硝基置换。

At 80℃, the yield of esterification of benzoic acid with ethanol could reach 95% by using 10% catalyst for 6 h; the conversion of toluene in the nitration with 1 equiv. of 65% nitric acid could be achieved to 99% by using 5% catalyst for 5 h.

在80℃下，摩尔分数为10%的Yb(NTf2)3负载催化剂，反应6h可使苯甲酸乙酯的产率达95%；摩尔分数为5%的Yb(NTf2)3负载催化剂，反应5h可使甲苯与等摩尔质量分数为65%硝酸的硝化反应转化率达99%。

The result indicates that the big π bond of benzene not only turns benzene into a Lewis base,but also makes it to undergo electrophilic substitution (halogenation,nitration,sulfonation and so on),rather than addition

结果表明，苯的环状大π键结构不仅使苯成为1个Lewis碱，而且使苯容易发生卤代、硝化、磺化等亲电取代反应，但不易发生加成反应。

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。