查询词典 alkanes

Because of the effect of catabolite repression and synergistic mechanism between pructs, the degradation of succinonitrile is promoted while the degradation of alkanes is inhibited in the mixed system of culture medium.

废水中烷烃质量浓度低，烷烃降解菌不能发挥其高效的降解作用，丁二腈质量浓度较大，降解效果明显，9h降解率可达到100%；腈纶废水经混合菌9h处理后，田氏去除率仅为29%，说明实际废水是个很复杂的体系，仅依靠个别高效菌株难以达到理想的整体处理效果，必须构建更多种类的具有协同作用的高效菌群，才能在实际应用中取得满意的结果。

Gasolinecontained 67.8% aromatic hydrocarbons, 21.47% olefins and a small quantityof alkanes and cycloparaffin hydrocarbons. The enlarging study on blending feed of vegetable oil and petroleumfraction was performed in a Two-Stage Riser.

通过优化各种因素，植物油的转化率达到81.18%，丙烯产率达到19.52%；汽油的产率为30.58%，其中含有67.87%的芳烃、21.47%的烯烃，以及少量的烷烃和环烷烃，其研究法辛烷值为90.3，抗爆指数为83.9。

After the decarboxylation process the alkane produced can be degraded or "cracked"=to lower carbon number alkanes.

脱羧基作用后，所形成的烷烃能被降解或"裂解"成低碳数烷烃。

Based on distance matrix and branch vertex of atoms in a molecula,a new topological index Hz has been established to be used in researching physical and chemical properties of alkanes .

基于距离矩阵，结合分子中各原子的支化度，构建了一种新的拓扑指数Hz，并用于研究饱和链烃类化合物的性质，获得了比较满意的结果，与其他已有的拓扑指数比较，Hz具有良好的结构选择性和相关性。

At the same time,the I_ calculated according to ven den Dool's definition will be of poor comparability since retention temp. TR and carbon number n of n-alkanes is not linearly correlated, especially when ...

根据恒温与线性程升的保留值方程建立的各种柱温模式下的保留指数相互转换方法能准确快速地预测不同柱温模式下的保留指数，以此来建立通用数据库以适应不同的分析条件的需要，特别是从2种升温模式出发预测其它柱温模式下的保留值能更方便地对复杂样品的分离条件进行优化。

The partial oxidation of ethane to ethene and hydrocarbon oxygenates is one of the most difficult processes in partial oxidation of alkanes.

乙烷选择氧化制乙烯或烃类氧化物是烷烃选择氧化研究的热点之一，也是难点之一。

The quantitative relation model was established between the fundamental or sum frequency and properties of straight-chain alkanes.

在此基础上建立了直链烷烃的物化性能与基频和总频之间的定量相关模型。

The results show that: 27 compounds were identified at 600℃, and most of them were alkenes, alkanes, acids, alcohols and phenolic substances; geraniol was identified, and its relative content was 3.6, which shows that geranyl 8-methoxycoumarin-3-carboxylic acid ester can release a certain amount of geraniol at smoke temperature; geranyl 8-methoxycoumarin-3-carboxylic acid ester can improve and modify the flavor, enhance the notes of sweet aroma and bean aroma, and reduce the biting taste of cigarette smoke.

结果表明，600℃时，8-甲氧基－香豆素－3-甲酸香叶酯的热解产物中共鉴定出27种成分，主要为烯类、烷类、酸类、醇类、酚类；鉴定出香叶醇，且相对峰面积3.6，说明8-甲氧基－香豆素－3-甲酸香叶酯能在卷烟燃吸温度下释放出一定量的香叶醇；8-甲氧基－香豆素－3-甲酸香叶酯具有改善和修饰卷烟香气，增加甜韵和豆香香韵，减轻刺激性的作用。

Grignard reagent with water, the reaction can be pure alkanes.

格氏试剂与水反应后可以得到纯的烷烃。

Surface tensions of several pure normal alkanes were calculated using the gradient theory of inhomogeneous fluids and equation of state.

应用梯度理论和状态方程（Peng－Robinson方程与Patel－Teja方程）相结合的半理论方法，计算了正构烷烃的表面张力，提出了关联作用参数C的新方程。

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。