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Their extraction properties have been studied by metal picrates liquid-liquid extraction and the results show:By using three thio-heterocyclic compounds, twelve novel derivatives of thioalkoxycalix[4]arenes on the lower rim have been synthesized and structurally characterized by 1H NMR、13C NMR、IR and MS.

本文采用三种巯基杂环化合物对杯芳烃下沿进行修饰,得到了下沿含有杂环硫烷氧基的杯芳烃系类系列衍生物,并利用~1H NMR、~(13)C NMR、IR和MS对所合成的十二个未见文献报道的新化合物进行了结构表征。

Ethane> toluene>1, 3, 5-trimethylbenzene>methyl isobutyl ketone>1, 4-Dioxane>isoprene> 1, 2, 4-trimethylbenzene>cyclohexane>1, 3-Butadiene>methyl butyl ketone were the most reactive VOC species in PRD.

化学活性排名前十位的化合物为:乙烯>甲苯>1,3,5-三甲苯>甲基异丁基酮>1,4-环氧乙烷>异戊二烯>1,2,4-三甲苯>环己烷>1,3-丁二烯>甲基丁基酮。

The esterification reaction and itsinfluencing factors of hexanoic acid with n-butanol, catalyzed by lipaseNovozym100T, were studied in water-in-oil microemulsions formed by alkylpolyglucoside C_(12)G_(1.50)/n-butanol/cyclohexane/water system.

研究发现,十二烷基聚葡糖苷C_(12G_(1.50)/正丁醇/环己烷/H_2O体系形成的油包水微乳液中,脂肪酶Novozym100T催化正己酸和正丁醇的酯合成反应,反应初始速率V_0随正己酸的初始浓度C_~0增大而增大;随正丁醇的初始浓度C_~0的增大而减小,后V_0进入一&坪区&。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

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我比喻得过头了。