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。

I was just taking her hand, to help her out of a car, and I knew it.

我只是握着她的手，扶她下车，但我知道这一切。

China and South Korea have excoriated Japan over its approval of new school books which they say whitewash the atrocities committed during Japanese occupation, and anti-Japanese protests have been held in Chinese cities. The lingering bitterness over Japan's past imperialism still threatens to mar relations between the big East Asian powers

中国和韩国强烈谴责日本通过新的中学历史教科书，他们认为这一教科书掩盖了日本在其占领期间所犯下的残酷暴行，反日抗议活动在中国数座城市发生，历史上日本帝国主义制造的痛楚无法被忘却，这有可能破坏东亚强国间的关系。