查询词典 benzene

The four fluorescence peaks are generated separately by the combined actions of the methyl parathion and the acetone. In methyl parathion molecule, there are the transition of n electrons in nitryl, the transition of π electronic structure formed by the oxygen atom and the benzene ring and the transition of n electrons in P=O group. In acetone molecule, there is the transition of n electrons in C=O group.

分析得到，四处荧光峰分别是溶剂丙酮分子中C=O上的n电子跃迁、硝基上的n电子跃迁、甲基对硫磷分子中氧原子与苯环形成的大共轭π电子结构跃迁以及P=S上的n电子跃迁共同作用产生。

A process for reducing nitryl with unstable guanyl on para-position of benzene ring into azyl features that active metal reacts on organic acid and solvent at ordinary temp. and pressure to reduce N-(2 or 3-M, 5 or 6-M',4-nitrophenyl)-N',N'-dimethyl acetamidine into N-(2 or 3-m, 5 or 6-M', 4-aminophenyl)-N',N'-dimethyl acetamidine, where M=H,-R,-OR,-COOR (R=H, C1-C6); and M'=H,-R,-OR,-COOR (R=H, C1-C6). Its advantages include reduced by-reaction and high reducting rate up to 80%-95%.

本发明是将苯环上对位带有不稳定脒基的硝基还原为氨基的方法，采用活泼金属，如：锌或锡，与有机酸和适当的溶剂，在常温、常压下发生反应，将N－（2或3－M，5或6－M＇，4－硝基苯基）－N＇，N＇－二甲基乙脒还原为N－（2或3－M，5或6－M＇，4－氨基苯基）－N＇，N＇－二甲基乙脒，其中M＝H，－R，－OR，－COOR（R＝H，C1－C6），M＇＝H，－R，－OR，－COOR（R＝H，C1－C6），减少了副反应，使还原收率达到80％以上，最高可达95％以上，更适用于工业化生产。

The bio-degradation pathways of NP would be that the long branches in nonyl of NP are firstly degraded into short methyl branches, which come into being a series of short chain alkyl phenols with different branch structures. The middle products should be further metabolized into simpler compounds, such as benzene acetic.

污水生物处理过程中壬基酚可能的初级生物代谢途径是壬基上的长支链断裂为短的甲基链，生成一系列带有不同分支结构的短链烷基酚类代谢产物，进一步的代谢产物有苯乙酸。

There are different methyl branch structures correlated with isomerous nonyl of NP in the alkyls. The primary metabolites from the dominant bacteria experiment have alkyl phenols and benzene acetic.

研究结果表明，活性污泥降解壬基酚的初级代谢产物主要为C4～C6烷基取代苯酚，烷基链的结构差异与其母体壬基的异构方式有关，烷基上的支链主要为甲基；优势降解菌群代谢壬基酚的初级产物除烷基苯酚外，还有苯乙酸等。

Like thionamic acid, alkyl benzene sulfonic acid, nonyl phenol oxygen ethylene ether, ethylene diamine four ethanoic acid two sodium, oxalic acid, deionized water and so on.

如氨基磺酸、烷基苯磺酸、壬基酚氧乙烯醚、乙二胺四乙酸二钠、草酸、去离子水等。

With polyoxyethylene nonyl phenol ethers (OP-10) as emulsifier and dodecyl benzene sulfonic acid as catalyst, hydroxy organosilicon microemulsion was prepared through octamethylcyclotetrasiloxane (D4) open-ring polymerization under certain conditions.

以壬基酚聚氧乙烯醚(OR-10)作乳化剂，十二烷基苯磺酸为催化剂，通过八甲基环四硅氧烷(D4)开环聚合，在一定条件下合成了端在基聚二甲基硅氧烷微乳液。

The shoe gum that contains toluene is big to human body noxiousness, should ban in shoe line of business with the glue that contains 3 benzene.

含甲苯的鞋胶对人体毒性大，应在鞋业中禁用含三苯的胶水。

Benzene is also widely used as solvents, the oil industry in the training is to improve the octane number of gasoline blending agent.

苯也广泛用作溶剂，在练油工业中是提高汽油辛烷值的掺和剂。

The results indicated that among sodium dodecyl benzene sulfonate, sodium oleate and glycol, the sodium oleate has good effect.

结果表明，在十二烷基苯磺酸钠、油酸钠和乙二醇3种不同的表面活性剂中，选用油酸钠效果最好。

Tenella infection, nitric benzene could interdict the entering of the parasite, it could ease the injury of the host cell and have certain protection to the chicken body ,but with the developing of the disease ,its function descend,but the time of the oocyst discharging was prolonged.

tenella病发生的早期，硝苯地平可以阻断球虫的侵入，减轻宿主细胞的损伤，对鸡体有一定的保护力，但随着疾病的发展，其作用下降，但使E。 tenella卵囊的排出时间推后。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。