查询词典 benzene

Compared with the conventionalemulsion polymerization system in the presence of sodium dodecyl benzene sulfonate, the latices prepared by emulsifier-free emulsion polymerization have much more narrow distribution of latex particle sizes (0.2um in diameter), better resistance to electrolytes, pH, freeze-thaw, and better mechanical stability. Not only the tensile strength of the copolymers prepared by this method is obviously increased, but also the water resistance and adhesion capacity are significantly enhanced. On the other hand, the TG results indicate the copolymer has lower thermal stability than conventional copolymer.

实验结果表明，与传统乳液聚合体系相比，所获得的无皂乳液的乳胶粒子大小均一，粒径在0.20um左右；乳液具有优异的稳定性，不受酸碱度、电解质和低温冷冻的影响；附着力和粘接强度明显提高；成膜后显示较高的耐水性；但TG表明乳胶膜热稳定性有所下降。

The result fights allergic experiment to show, dispel the wind stops land of can different level restrains urticant Ding allergy of akin and passive skin mixes the bandicoot that antiserum causes 2, the sex of small rat late hair of chloric benzene be caused by exceeds 2 nitro- of 4- quick the thymus index that reaction; still can increase small rat when dosage greatly and lienal index; stop urticant experiment shows, dispel the wind stops urticant Ding can reduce the time of fit of small rat itching with dextrose lead anhydride and itching duration apparently, can increase Guinea pig to be able to bear or endure those who suffer phosphoric acid histamine send urticant threshold.

结果抗过敏试验显示，祛风止痒酊能不同程度地抑制抗血清诱发的大鼠同种被动皮肤过敏和2，4-二硝基氯苯所致的小鼠迟发性超敏反应；大剂量时还可增加小鼠的胸腺指数及脾指数；止痒试验显示，祛风止痒酊能明显降低右旋糖酐诱导的小鼠搔痒发作次数及搔痒持续时间，并能增加豚鼠耐受磷酸组胺的致痒阈。

For better understanding the relationship between chemistry composes and activities, and promoting the competitive strength, 16 benzene derivatives (three new compounds and a novel skeleton) were isolated from Ligularia veitchiana which were collected in Hubei province.

为了更好的了解植物药中的化学成分及药效关系，提升我国植物药在国际市场的竞争力，我们对采自湖北的离舌橐吾进行了系统的化学成分分离，得到16个苯的衍生物，其中，新化合物三个，新骨架化合物一个。

Phenylethyl than malonic acid methyl malonic acid benzene over a methylene, metal complexes of stability and performance is a lack of research.

苯乙基丙二酸比苯甲基丙二酸多一个亚甲基，其金属配合物的稳定性及性能尚缺乏研究。

The technology of calcium-removing in the production of high-purity manganese carbonate is studied in which the manganiferous waste water from the production of 1,4-dihydroxy benzene is as raw material.

研究了以对苯二酚生产中副产含锰废水为原料，生产高纯碳酸锰的除钙工艺。

In a word, with the manganiferous waste water produced from the manufacture of 1 ,4-dihydroxy benzene as raw material, preparation of high-purity manganese ~ carbonate is feasible in technicality, reasonable in process and considerable inAeconomic benefit.

总之，以对苯二酚生产中副产的含锰废水为原料，生产高纯度碳酸锰在技术上是可行的，工艺上是合理的，经济效益是可观的。

Hign-purity manganese carbonate from the manganiferous waste water was produced from the manufacture of 1,4-dihydroxy benzene, especially the preparations from waste water containing plenty of natrium and sulphate were studied.

以对苯二酚生产中副产物含锰废水为原料，研究了生产高纯碳酸锰时除杂质钠盐与硫酸根的工艺，并研究了影响杂质含量的诸因素，如温度、锰离子浓度、加料方式等。

By means of molecular designing, a series of sodium branched-alkyl benzene sulfonates weresynthesized through seven process, involving Frieded-Crafts reaction, Grignard reaction, sulfonationand neutralization. Those isomers have similar structure, carbons of same quantity, but the position ofalkylaryl dissimilarity. Liner fat acid, metaxylene and halogenated hydrocarbon of different carbonnumber were used as the starting materials. Optimum processing condition was confirmed consideringinfluence of a series of reaction factors such as feed proportioning, quantity of catalysts, quantitysolvent, reaction time, temperature and pressure. Eight kinds of isomers of sodium hexadecylxylolsulfonates were finally synthesized, and characterized by FT-IR.

本文通过分子设计，以不同碳数直链脂肪酸、间二甲苯以及不同碳数的卤代烷为原料，经酰基化、格氏反应、加氢还原、磺化及中和等反应，合成了结构相似、烷烃链碳数一定、芳基在烷烃链不同位置的烷基芳基磺酸盐同分异构体；并考察了原料配比、催化剂用量、反应时间、反应温度、溶剂用量、反应压力等一系列因素对各反应的影响，进而确定最佳工艺条件，最终合成出十六烷基二甲苯磺酸钠的八种同分异构体，利用 FT-IR 对产物结构进行了分析。

1H-NMR and UV analysis show that, after reaction, benzene ring in the structure unit of the alkali lignin is steady, carboxyl, carbonyl and methoxyl all have reduced in different extent, while aliphatic and phenol hydroxyl have increased.

1H-NMR和UV光谱分析显示反应后碱木质素的结构单元中苯环结构稳定，羰基、羧基、甲氧基有所减少，醇羟基和酚羟基的量增加了。

Benzene and other monocyclic hydrocarbons had the highest concentrations ranging from 4.25 to 202.35μg/m3, and other VOCs such as chlorinated hydrocarbons had relatively lower concentrations.

因此加强对垃圾的卫生填埋，尤其是加强对夏季的垃圾卫生填埋的科学管理，减少挥发性有机污染物向大气中的扩散，应给予充分的关注。

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。