查询词典 petroleum

Ether, replacing petroleum, walk this road, that be: best way!

代替石油，走这一条道路，那就是：最好的办法！

Furthermore,inhibition effect of petroleum ether phase was stronger than the other different extract component from ethanol extracts.

在乙醇提取物不同的萃取组分中，石油醚部分的抑菌活性最强。

Being treated with alcohol and petroleum ether, tannin purity of the extract increased by 10% and the extraction ratio reached 95%.

采用乙醇和石油醚对其进行纯化处理，可使单宁纯度提高10％，单宁提取率达到95％。

Chen et C.Ling,20 times amount of petroleum ether,refluring for 2 h,and extracting 3 times.

结论该法的最佳工艺为：过325目筛温莪术微纳米粉体，加20倍质量倍数的石油醚，回流2 h，提取3次。

In study, we used petroleum ether as the solvent instead of aether during oximation process, which increased the yield above 85% dramatically.

对该路线进行了较多的实验工作，对各步反应的诸多影响因素进行了研究，确定了合理的工艺条件。

Its main insecticidal active components were weak polar matter and mainly distributed in the polarity range of petroleum ether.

不同极性萃取物的活性比较得知，杀虫活性成分主要是酯溶性的弱极性物质，分布在石油醚所在极性范围内。

The purpose of this study is petroleum ether (30℃-60℃) the optimum extraction of artemisinin-based research, as well as by ultraviolet-visible spectrophotometer in the artemisinin content of Artemisia annual samples.

本研究主要是对石油醚（30℃-60℃）提取青蒿素的最佳工艺的研究以及用紫外-可见分光光度计对青蒿中青蒿素含量的测定。

Soluble in acetone, benzene, toluene as organic solvents, soluble in petroleum ether and carbon tetrachloride.

溶于丙酮、苯、甲苯等有机溶剂中，难溶于石油醚和四氯化碳。

Liquefied petroleum gas and dimethyl ether are Group A dangerous chemicals.

液化石油气和二甲醚均属甲类危险化学物品。

Purified by petroleum ether instead of benzene, the results had no obvious difference.

与用苯作为洗脱剂方法测定结果比较，两者无显著性差异。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。