酸基

The item will establish a set of producing propyl- aldehyde 20 thousand t/y and its backwards' process using the advanced technology above. The main productions are propyl- aldehyde, propyl- alcohol propyl-ache, and etc..

本项目拟建设一套2万吨/年丙醛生产装置及其下游产品加工装置，采用国内研制开发的以催化稀乙烯和合成气为原料的羰基合成工艺，主要产品有：丙醛、丙醇、丙酸、丙酸钙、丙酸钠和丙酸胺等。

The IR spectra indicated that the functional group—COO〓 in PASP linked to the surface of carbon steel. The pitting corrosion inhibition of tungstate and BTA on carbon steel and the passivation of carbon steel in solutions containing sodium borate were studied by the measurement of polarization curves and the curves of current vs.

失重法研究钨酸钠与聚天冬氨酸对碳钢的协同缓蚀效应发现，钨酸钠与PASP对自来水中的碳钢有协同缓蚀作用，加入锌离子可产生进一步的协同作用，碳钢表面分析表明：聚天冬氨酸是以羧基在碳钢表面成键。

In addition, there were also some special aromatic substances such as 1-nonanol, hexanoic acid 2-hexenyl ester, propanoic acid 2-hexenyl ester, butanioc acid 3-hexenyl estertrans-2-hexenyl valerate, theaspirane, gerenylacetone, methyl benzoate and ethyl benzoate.

此外还含有一些少量的1-壬醇、己酸－2-己烯酯、丙酸－反－2-己烯酯、丁酸－反－3-己烯酯、戊酸－反－2-己烯酯、茶螺烷、香叶基丙酮、苯甲酸甲酯、苯甲酸乙酯和乙酸辛酯等。

It was found that ARA was composed of esterification products of (2-HEA)-ester with pimaric acid, dehydroabietic acid, abietic acid and two isomers of acrylpimaric acid. ARA is a good crosslinking agent which can copolymerize with most vinyl monomers. The properties of solvent-resistance and heat resistance of the copolymer were improved considerably by the use of ARA.

实验结果表明：ARA主要由海松酸、脱氢枞酸、枞酸和丙烯海松酸的二种异构体的丙烯酸－2-羟基乙基酯的酯化产物组成，ARA是一种良好的交联剂，可与大多数乙烯基单体共聚合，其与MMA的共聚物的耐溶剂性和耐热性均得到了较大幅度的提高。

Adopting condensation copolymerization between alkylphenol polyoxyethylene ether and methyl aldehyde and using concentrated sulfuric acid sulfonation, which it with sodium hydroxide neutralization, finally acquired sulphonate anionic surfactant, utilize as temperature resistance 、mineral salt tolerance for heavy oil viscosity reducer , research on the performance evaluation, the result indicate, the amount of sulphonate anionic surfactant to be used at 0.2wt%, viscosity reducer rate reached 92.1%; added with 0.5wt%, the calcium and magnesium ions resistance in mineral water up to 800mg/L.

采用辛基酚聚氧乙烯醚和甲醛的共缩聚物与浓硫酸磺化后，再用氢氧化钠中和后得到磺酸盐阴离子表面活性剂作耐温抗矿盐稠油降粘剂，并对其进行性能评价，结果表明，辛基酚聚氧乙烯醚甲醛共缩聚物磺酸盐阴离子表面活性剂加量为0.2wt%时，降粘率高达92.1%，抗钙、镁离子能力达800mg/L。

The novel process of preparation of DNS by means of dioxygen liquid-phase oxidation of NTS with synthesized metal phthalocyanine complex catalyst in alkali solution under mild condition were systematically investigated for the first time.

首次以金属酞菁络合物为模拟酶催化剂，在碱性水溶液中，于温和条件下，研究了4-硝基甲苯-2-磺酸催化氧化制取4，4'-二硝基二苯乙烯-2，2'-二磺酸的方法和工艺。

The principal component of water-soluble acids is the saturated aliphatic diacids of C〓 to C〓 and the saturated aliphatic monoacids of C〓 to C〓; and the water-insoluble acids are organic macromolecular compounds containing a large amount of carbonyl, carboxyl structures and aromatic group.

水溶酸的成分以C〓~C〓的饱和二元脂肪酸和C〓~C〓的饱和一元脂肪酸为主；水不溶酸是含有大量羰基、羧基结构和芳环的有机大分子化合物，其结构非常接近腐植酸。

It was shown that these two strains both can utilize benzoate as sole carbon source and the maximum tolerance of benzoate are 1.7% and 1.600, respectively; These two strains both can grow on benzene, toluene, xylene, phenol, benzyl alcohol of as sole carbon source. Pfluorescens PFO1 can degrade dianiline, 3,5-dinitrosalicylic acid, p- dimethylaminobenzaldehyde while P. aeruginosa ATCC27853 can utilize 3,5-dinitrosalicylic acid, p- dimethylarninobenzaldehyde.

结果表明，两种菌都能在以苯甲酸钠为唯一碳源的基础培养基上生长，并且，对苯甲酸钠的耐受性分别达到1.7％和1.6％；两种菌都能以适当浓度的苯，甲苯，二甲苯，苯酚，苯甲醇为唯一碳源生长；荧光假单胞菌能以二苯胺，对二甲氨基苯甲醛，3，5-二硝基水扬酸为唯一氮源生长；铜绿假单胞菌能以3，5-二硝基水扬酸，对二甲氨基苯甲醛为唯一氮源生长。

Company products are mainly involved in polyurethane, PVC, resin, paint, plastics, pharmaceuticals and other industries, the main oxidation products of alkyl tin, tributyltin chloride, tin dilaurate, citric acid esters, their production capacity for the oxidation of alkyl tin 50T / month, tributyltin chloride 30T / month, tin dilaurate 30T / month, citric acid ester 100T / month.

公司产品主要涉及聚氨酯、PVC、树脂、涂料、塑料、医药等行业，主要产品有氧化烷基锡、氯化丁基锡、月桂酸锡、柠檬酸酯等，其生产能力为氧化烷基锡50T/月、氯化丁基锡30T/月、月桂酸锡30T/月、柠檬酸酯100T/月。

Six years later, John Roebuck in England adapted principium of nitroso process to build up a 6ft (1.89m) square lead-line chamber and carried out nitroso process reaction inside.

经过6年后，按亚硝基法原理，英国人丁·罗巴克在伯明翰建成一座6ft(1.89m)见方的铅室，在铅室内进行上述亚硝基制酸反应，成为世界上最早的铅室法制酸工厂。

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。