甲苯

According to the frequently used methods of extraction and isolation of natural products from organic body, the freeze-dried ascidian body was exhaustively extracted with methanol/toluene ( 3 : 1 ) and then the combined extracts were filtered and the solvent was separatelyconcentrated under vacuum.

按照目前比较常用的天然产物提取分离方法，将样品冷冻干燥后，用甲醇：甲苯(3：1)浸泡，收集滤液，减压蒸馏得到的浓缩液用NaNO_3水溶液萃取，收集水相，减压浓缩至NaNO_3晶体析出。

The Research on New-type Energy Conserving and Truck-loaded Installation for Heating up Asphaltum with Remaining Heat of Exhaust Gas of Automobile

通过热处理技术，对沥青进行改性试验，提高了沥青的软化点及甲苯不溶物含量，改性后沥青可满足建筑沥青使用要求。

It is focused on the discussion of process parameter such as temperature, reaction period, and substrate concentration in autoxidation of o-nitrotoluene in alkali system, and the yield of o-nitrobenzalhyde is 30% under optimum condition.

论文着重讨论了碱性条件下，氧气氧化邻硝基甲苯的反应，得出了温度、时间、底物浓度、氧气流量等一般工艺参数对反应的影响，得出在较佳条件下，邻硝基苯甲醛的收率可达30％左右。

It is focused on the discussion of process parameter such as temperature, reaction period, and substrate concentration in autoxidation of o-nitrotoluene in alkali system, and the yield of o-nitrobenzalhyde is 30％ under optimum condition.

氧气氧化邻硝基甲苯的反应，得出了温度、时间、底物浓度、氧气流量等一般工艺参数对反应的影响，得出在较佳条件下，邻硝基苯甲醛的收率可达30％左右。

In truth, bakelite whose more chemically formal name is polyoxybenzylmethylenglycolanliydrid----was just a harbinger of the age of plastics

事实上，酚醛----其正式的化学名称是聚甲苯甲醛甘醇酐----只是预示了塑料时代的到来。

Molar ratio of hydrogen to benzaldehyde was increased in consecutive hydrogenation process, which is beneficial to enhancing the selectivity of benzyl alcohol.

在苯甲酸甲酯加氢连续步骤中的氢醛比得到提高，有效地抑制了副产物甲苯的生成。

Hazard analysis sheet is not updated and potential hazards are not identified in part of raw materials e.g. heavy metal, benzene hexachloride and DDT in raw materials, heavy metal and toluene diamine in inner packaging materials.

危害分析表中对部分原料的不同危害未明确识别，如原料鲜奶(化学危害：六六六/滴滴涕/黄曲霉毒素/重金属/四环素/磺胺类等)和内包材甲苯二胺/重金属

There is much bacteria which can degradate benzene series compound ,also there's some which can degradate ortho-xylene.

研究结果表明，EJD— 1对甲苯有较好的降解效果，活性污泥中有大量苯系化合物的降解菌，也有难降解污染物邻二甲苯的降解菌。

In this paper,the detailed preparation process of gas chromatographic column for separating benzene series was introduced,the optimum column temperature and flow rate of carried gas were selected for separation the mixture of cyclohexane,benzene and toluene,and the column performance has been studied in respects to column efficiency and separating size.

本文主要介绍了气相色谱柱的详细制备过程，并以环已烷、苯和甲苯的混合物的分离为例，选择了最佳的操作条件。同时从柱效率和分离度两方面考察了该色谱柱的柱性能。

The results show that EJD-1 has good degradation effect for methylbenzene.There is much bacteria which can degradate benzene series compound,also there's some which can degradate ortho-xylene.

研究结果表明，EJD— 1对甲苯有较好的降解效果，活性污泥中有大量苯系化合物的降解菌，也有难降解污染物邻二甲苯的降解菌。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。