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- The raw material was p-tert-butyltoluene.Three kinds of conditions which affected the reaction were discussed:The concentration of nitric acid,the temperature and time of the reaction. 在初步实验的基础上,对硝酸浓度、反应温度、反应时间等因素进行了正交实验,找到了反应的最佳条件。
- the concentration of nitric acid 硝酸浓度
- The procedure has been optimized experimentally for the size of the column, different concentrations of nitric acid for column load, column rinse and the different types of eluant. 通过对色层柱体积、吸附酸度、洗涤酸度,以及不同洗脱剂的条件实验,确定了分离流程。
- Brief Discussion of Design, Installation and Maintenance of Column Used for Concentration of Nitric Acid 浅谈硝酸浓缩塔的设计、安装及维护
- concentration of nitric acid 硝酸含量
- Determination of isotopic content and concentration of uranium and plutonium in nitric acid solution - Mass spectrometric method??? 硝酸溶液中铀、钚同位素含量和浓度的测定? 质谱法
- Aquatint:It is an etching process on copper or steel by means of nitric acid. 水彩色调:用硝酸在钢片或铜片上作腐蚀的蚀刻法。
- This product is compound of nitric acid miconazole and clobetasol propionate. 本品为硝酸咪康唑与丙酸氯倍他索的复方制剂。
- Scientists believe that tiny ice crystals of nitric acid in Antarctica's upper atmosphere are directly involved. 科学家认为，南极上部大气圈内微小的硝酸冰晶也直接参与其中。
- A problem related to nitrification is a drop in PH for the system due to the formation of nitric acid. 和硝化作用有关的一个问题就是由于生成硝酸而使系统内的PH值降低。
- The univalent radical NO3or a compound containing it, as a salt or an ester of nitric acid. 硝酸根，硝酸盐（酯）一价的根NO3或包含它的化合物，如一种硝酸盐或者酯
- The authors suggest that the traces of nitric acid may be removed by boiling cyclonite in an autoclave at 140℃. 研究者们提出，（黑索金中）微量的硝酸，可于140℃下在压热器中煮洗除去。
- The univalent radical NO3or a compound containing it,as a salt or an ester of nitric acid. 硝酸根，硝酸盐(酯)一价的根NO3或包含它的化合物，如一种硝酸盐或者酯
- The univalent radical NO3 or a compound containing it, as a salt or an ester of nitric acid. 硝酸根，硝酸盐（酯）一价的根NO3或包含它的化合物，如一种硝酸盐或者酯
- The nitric acid changed the cuticle of his mouth to a yellow color. 硝酸将他口腔里的护膜变成了一种黄颜色。
- At present, the making of the pad to use Add protection of nitric acid and ferric chloride solution for corrosion. 目前移印钢板的制作以使用添加保护剂的硝酸溶液和三氯化铁溶液进行腐蚀为主。
- There is a concentration of people in big cities. 大城市人口集中。
- The formation of nitric oxide from nitric acid and mercury is applied in a volumetric method of analysis for nitric acid or its salts. 硝酸与汞生成一氧化氮的反应已用于硝酸及其盐类的容量分析法中。
- The sample was dissolved in a mixture of nitric acid and hydrofluoric acid then determined by graphite furnace atomic absorption spectrometry. 摘要用硝酸和氢氟酸溶解铜合金，用石墨炉原子吸收光谱法直接进行测定。
- NDMA in beer mainly came from malt and formed in malt preparation and ATNC was produced through reducing reaction of nitric acid. 啤酒中的NDMA主要来源于麦芽，在制麦工艺过程中形成；ATNC主要由微生物的硝酸还原反应产生。
