难检字字典在线查询

汉语拼音：tīng jī

碳氢化合物分子中除去一个或一个以上氢原子后所构成的基团。如甲烷除去一个氢原子成甲基，乙烷除去一个氢原子成乙基，苯除去一个氢原子成苯基等。

• The hydrocarbon diperchlorate products have utility as detonatable sensitizers for explosives and alkylating agents.

  二过氯酸烃基酯产物可用作起爆药的敏化剂及作为烷化剂.

• This paper studied the catalytic N - alkylation of acetanilide with polyvinyl chloride - pyridine resin.

  研究了聚氯乙烯 - 吡啶树脂催化乙酰苯胺的N - 烃基化作用,反应条件温和,产品收率令人满意.

• Like Analytica EBC, the new assay is based on the spectrophotometric stimation of 2, 3 - dialkylquinoxalines .

  跟EBC分析法一样, 新的测定法也是以分光光度法测定2 、 3—— 二烃基喹喔啉为基础.

• The freshwater blue - green alga Phormidium foveolarum Gom. was grown on medi - um containing hydrocarbons.

  坑形席藻(PhormidiumfoveolarumGom. )是长期培养于含石油烃基质的淡水蓝藻.

• The freshwater blue - green alga Phormidium foveolarum Gom. was grown on medi - um containing hydrocarbons.

  坑形席藻(Phormidium foveolarum Gom. )是长期培养于含石油烃基质的淡水蓝藻.

• Methods: The target compound was synthesized through bromination and thioetherification from 4 - methoxyacetophenone as a starting material.

  方法以3-甲氧基苯硫酚和对甲氧基 - 苯乙酮为原料经溴化、烃基化、环合重排排制得目标产物.

• Conclusions: The alkanes substituted phenolshigher antioxidant activity than that of electron - withdrawing groups substituted phenols.

  结论: 烷烃基类取代物易于抗氧化,卤代烃基或硝基类取代物抗氧化活性差.

• The extraction behavior of dialkyl ( aryl ) Sulfides may be controlled by polar and steric substituents effects.

  二烃基 ( 基 ) 醚的萃取行为受极性和空间取代基效应的控制.

• In this article, alkyl radical structure of heavy alkylbenzene is studied mainly with ESI - MS method.

  采用多种分析手段,其中以电喷雾质谱为主的方法研究了重烷基苯的烃基结构.