甲苯

Comparision on antibacterial activity of ethanol extracts of clove bud and clove fruit in vitro;2. The results showed that ethanol extracts from C.

法测定了油茶叶乙醇提取物的抗氧化活性，并与芦丁、二丁基羟基甲苯进行了比较，在波长517nm、反应时间40min的条件下测定了DPPH。

Then more tar with hydrocarbon substituent is expected than benzene in the engineering application of biomass gasification gas reburning with tar.

本文对所选取的苯、甲苯、苯乙烯和苯酚等典型焦油模型化合物还原NO开展了实验研究，分析各焦油组分还原NO的特性。

Isolated PBMC were separated from 5 mL venous blood in asepsis condition. NF-κB stimulator, NF-κB inhabitor and astragalus were added into the different tubes of PBMC, respectively.

抽取所有研究对象5 mL静脉血并提取PBMC，分别加入NF-κB刺激剂IL-1β、NF-κB抑制剂对甲苯磺酰－L-苯丙氨酸氯甲基酮及黄芪注射液。

According to the results of the examination, the stronger the electron-withdrawing protective group of imines, the better the cis-selectivity of the reaction, 68% yield, trans:cis is 99:1 diastereoselectivity could be leaded by Ts-imines (4-methyl-N-methylene-benzenesulfonaides) with a substituent [2,4-(CH3O)2C6H3], Substrate scope investigation revealed that a wide variety of ketenes and imines could react smoothly to afford corresponding,β-lactams.

实验结果表明，亚胺的保护基团吸电子能力越强，越有利于顺式产物的生成。对甲苯磺酰基保护的取代基为2，4-二甲氧苯基的亚胺参与的该反应可得到68%的产率，反式：顺式=99：1的非对映选择性。底物拓展过程中发现Staudinger反应适用于多种不同的亚胺与烯酮。

By one-pot method,with p-toluenesulfonic acid as catalyst,trimethyl orthoformate and cyclohexanone reacted in isopropanol to form 1,1-dimethoxycyclohexane,which,without separation,reacted furthur with isopropanol to form the title compound by distilling off the low-boiling product.

用一锅法，以对甲苯磺酸为催化剂，在异丙醇中原甲酸三甲酯与环己酮反应，其产物不经分离直接与异丙醇交换，得到1，1-二异丙氧基环己烷。

The synthesization technics of MPEG- MAA was studied in this paper,which is an important intermediate used for preparation of polycarboxylate superplasticizer.

本文对制备聚羧酸系减水剂的重要中间体——甲基丙烯酸聚乙二醇单甲醚酯的合成工艺进行了研究，考察了反应时间、催化剂对甲苯磺酸的用量、阻聚剂对苯二酚的用量、反应温度及甲基丙烯酸与聚乙二醇单甲醚的用量比对酯化率的影响。

Pregnant women exposed to lead, benzene, toluene, xylene, ethylene chloroprene, mercury and mercury compounds, arsenic, cyanide, nitrogen oxides, carbon monoxide, chlorine, carbon disulfide, styrene, ethylene oxide, aniline and formaldehyde and other chemicals prone to pregnancy-induced hypertension syndrome, appears lower extremity edema, blood pressure, urine protein appeared, and there will be a serious headache, vertigo, chest tightness and other symptoms, or even convulsions.

妇女怀孕后接触铅、苯、甲苯、二甲苯、氯丁乙烯、汞和汞的化合物、砷、氰化物、氮氧化物、一氧化碳、氯气、二硫化碳、苯乙烯、环氧乙烷、苯胺和甲醛等化学物质容易患妊娠高血压综合症，出现下肢浮肿、血压增高、尿中出现蛋白，严重时会出现头痛、眼花、胸闷等症状，甚至发生抽搐。

The major occupational hazards factors in printing ink were benzene, toluene, xylene, ethylbenzene, solvent gasoline, methanol, alcohol, isopropyl alcohol, ethyl acetate, butyl acetate, butyl acetate, dichloromethane, etc. 10 of 1224 samples (0.82%) exceeded the national occupational health standards.

印刷油墨中存在的职业病危害因素种类主要有苯、甲苯、二甲苯、乙苯、溶剂汽油、甲醇、乙醇、异丙醇、乙酸乙酯、乙酸丁酯、二氯甲烷等，检测样品总数1224件，超标样品数10件，超标率为0.82%。

"Toluene: Colourless, flammable , toxic liquid hydrocarbon aromatic compound (C6H5CH3), the methyl derivative of benzene."

甲苯：无色、易燃、有毒的液体烃芳香族化合物，是由苯衍生出甲基。

Rubber —material that is capable of recovering from large deformations quickly and forcibly, and can be, or already is, modified to a state in which it is essentially insoluble in boiling solvent, such as benzene, methyl ethyl ketone, or ethanol-toluene azeotrope.

以上就是该标准对于橡胶的定义。从这个定义包含两层含义：（1）是说明了橡胶材料的力学特征——能够从大变形迅速而强烈的回复；（2）是说明了橡胶可以被改性到不溶解、可溶胀的状态——能够被改性至一种不能被沸腾溶剂（如苯、甲基乙基酮、乙醇-甲苯共沸物）溶解的状态。

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。