查询词典 acetophenone

Results: An acetophenone derivatives was isolated and identified as 2,4-dihydroxy-f-methoxy-3-methylacetophenone with a concentration〉98oA.

结果：鉴定该化合物为2，4-二羟基-6-甲氧基-3-甲基-1-苯乙酮，纯度〉98%，用于狼毒制剂结核灵片的质量控制。

The results indicate that the acetophenone conversion is affected orderly by substrate concentration, reaction time, reaction temperature and yeast concentration.

结果表明，影响苯乙酮转化率的因素依次为底物浓度、反应时间、反应温度和酵母浓度，影响1苯基乙醇对映选择性的因素依次为反应温度、底物浓度、酵母浓度和反应时间。

Ee value was achieved when acetophenone was chose as the substrate under the optimal condition.

研究了该催化剂催化的以苯乙酮为底物的不对称硅腈化反应，在最佳反应条件下得到了69%的ee值。

The Problems of Spectrum, Quantum Yield of Phosphorescence, Photosensitization and Photostabilization of Polymeric Acetophenone and Its Derivatives

高分子苯乙酮及其衍生物的光谱、磷光量子产率及光敏化光稳定问题的研究

The invention relates to a method of preparing acetophenone by ethylbenzene photocatalysis and oxidation, belonging to the technical field of organic synthesis application.

本发明涉及一种乙苯光催化氧化制备苯乙酮的方法，属于有机合成应用技术领域。

The results indicated that acetophenone can be reduced by NaBH4/BF3·Et2O wit...

Et2O还原苯乙酮可以获得很高的化学产率和低到中等的对映选择性。

A gas chromatographic method to determine the conversion of asymmetric hydrosilylation of acetophenone has been established.

建立了由气相色谱法测定苯乙酮不对称硅氢化反应转化率的定量方法，操作简便、迅速，重复性和精密度较好，多个样品各重复6次的变异系数均小于1％，且结果与1HNMR法测定结果一致。

The content of 1,8-cineole in eucalyptus oil was determined using cyclohexanone or acetophenone as internal standard.

通过用环己酮和苯乙酮作内标物，对含量 80 %桉叶油中 1，8-桉叶油素含量的测定进行比较，结果表明，用苯乙酮作内标测定，标准偏差为 0 。2 7，变异系数为 0 。33%，而且毒性较小，是较理想的内标物。

A new way of synthesis 2-methoxy-4'-trifluoromethyl acetophenone by the method of crossed ester condensation was investigated in the overall yield of higher than 85%.

本文提出了一种新的方法——交叉酯缩合法合成2-甲氧基-4'-三氟甲基苯乙酮。

In dilution solvent add 3-5% ring acetophenone or ethers solvent

在稀释溶剂里加入3－5%环乙酮或醚类溶剂

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。