查询词典 benzene series

The result shows at the mild condition chain olefin that nCl7, polyethylene can be cracked into solutions of ethane, propane, butane, benzene and toluene and other small molecular compounds, polyethylene reacted fluids are mainly composed of a-olefin at the range 12 to 38, by which α-ωdiene, saturated hydrocarbon and aromatic hydrocarbon, anthracene, phenanthrene of albocarbon series are contained.

结果表明，在温和条件下可以将链状烷烃如正十七烷烃、聚乙烯通过微波及炭催化剂的作用，裂解成乙烯、丙烷、丁烷、苯、甲苯等溶剂及小分子化合物。聚乙烯反应液体产物以碳数在12~38范围的α-烯烃为主，也产生α-ω二烯、饱和烃及芳烃，芳烃主要有萘系列、葱、菲等。

A series of crosslinked sulfonated polys were synthesized from 4,4'-difluorodiphenyl sulfone, 4,4'-biphenol, 3,3'-disulfonate-4,4'-difluorodiphenyl sulfone and 1,3,5-trihydroxy benzene by nucleophilic substitution polycondensation reactions. The trifunctional crosslinker of THB was in the mass fraction range of 3%-7%.

以4，4'-二氟二苯砜、4，4'-联苯二酚、3，3'-二磺化－4，4'-二氟二苯砜二钠盐和三羟基苯为原料，经高温溶液缩聚反应，制备了一系列不同磺化度的新型交联磺化聚芳醚砜。

Methods CBP 20 capillary column was used and the temperature was increased with a program to separate and determine 7 kinds of benzenes series,namely,benzene,toluene,ethylbenzene,p-xylenol,inter-xylenol,cinnamene and ortho-xylenol.

利用CBP-20毛细管色谱柱，采用程序升温实现苯、甲苯、乙苯、对二甲苯、间二甲苯、苯乙烯、邻二甲苯等7种苯系物的分离测定。

A series of pyridazino[3,2-c]1,2,4-triazoles were synthesized from hydrazides and 3-aryl-6- chloro pyridazine s (3a～3d), which were obtained from substituted benzene and succinic anhydride by Friedel-Crafts reaction, cyclization with hydrazine hydrate, dehydrogenation and chloro-substitution.

以取代苯和丁二酸酐为起始原料，经Friedel-Crafts反应，肼合环，Br2/HOAc氧化脱氢后得到一系列1，6-二氢-3-芳基-6-哒嗪酮(2a～2d)。然后将2a～2d与PCl5在POCl3中回流，得到相应的氯代产物3a～3d，将其与酰肼作用，合环后得到一系列未见报道的哒嗪并[3，2-c]1，2，4-三唑类化合物。所有化合物结构均经元素分析，IR，1HNMR和MS谱得以证实，并对其波谱性质进行了讨论

A series of ABEPS were synthesized from long chain fatty acids, benzene, polyglycol and 1, 3-propane sultone by the procedure of Friedel-Crafts acylation, Huang-Minlon reduction, Williamson and sulfonation reaction, and these compounds had never been reported in the past time.

以长链羧酸、苯、多缩乙二醇和丙烷磺内酯为初始原料，依次经Friedel-Crafts酰基化反应、Huang-Minlon还原、Blank反应、Williamson成醚以及磺化反应等过程，合成了系列未见报道的ABEPS。

A series of polys based on pyromellitic dianhydride, biphenylyl tetracarboxylic dianhydride, thiodiphthalic dianhydride bis benzene dianhydride and oxydiphthalic dianhydride were prepared in different solvents.

以所合成的AB_2单体为原料，合成了一系粘度较低、溶解性良好，带端酚羟基、苯甲酰基、乙酰基、氰代苯基和苯酰苯亚胺基的芳香族超支化聚酰亚胺，通过核磁波谱、红外光谱分析和元素分析对其结构进行确证。

A series of tri- and tetrasubstituted benzene derivatives 1-8 with extended rigid arms carrying mono- or bidentate binding sites at the termini were synthesized as connectors for a molecular construction kit.

一系列的三和四取代苯衍生物 1月8日延长刚性武器进行单或双齿结合位点在总站合成作为连接器的分子构建模块。

Treatment of the diacetoxy-calix [4] arene with a series of ditosylates in dry MeCN in the presence of NaOH resulted in formation of electron-rich calix [4] areneocrowns, which reacted with 4, 4'-bipyrindinium and p-bis -benzene at room temperature in dry MeCN to afford self-assembling [2] catenanes by π-π stacking interaction.

以杯[4]芳烃为原料，通过三氟乙酸铊将其氧化成醌，醌类化合物在Zn粉、冰醋酸、少量盐酸和过量的乙酸酐中反应得到双乙酰化产物，利用氢氧化钠使其水解，然后再与各种对甲苯磺酸二酯进行环化反应，得到一系列具有富电子空腔的杯[4]芳烃并冠醚。

Phthalic acid esters are widely used in the many fields of industry. So many countries including China have come to pay attention to them and make up the codes for limiting the content in some products such as textile. By combining international codes, the thesis selects coating and textile that have close relative with people as objections. The research results are as follows:1. The thesis has established the textiles preparation method by a series of experimentations such as extraction solvent, extraction time, solid-phase extraction. The average recoveries of eleven phthalates are from 80.30% to 98.00%, and the relative standard deviations from 0.59% to 2.56%, the results show that this method is accurate and credible.2. The thesis set up the simultaneous determination of benzene, toluene, xylenes and phthalates in coatings.

邻苯二甲酸酯类化合物被广泛地应用在工业领域的各个方面，国际上已经开始重视邻苯二甲酸酯作为一种内分泌干扰素的危害性，对在一些产品中的用量作出了限制，但没有具体的分析测定方法，本论文结合国际法规选择了与人们生活密切相关的涂料和纺织品来研究其中邻苯二甲酸酯类环境激素的测定方法，研究内容如下：(1)通过对提取溶剂、提取方式、提取时间的选择实验以及固相萃取的一系列条件实验，首次建立了纺织品中测定邻苯二甲酸酯类环境激素的前处理方法，并对分析方法作了准确度、精密度验证。

A series of three factors-three level orthogonal experiments were performed to investigate anaerobic biodegradation performance of BTEX （benzene, toluene, ethlybenzene and xylenes ）including three types of bacteria;nitrate, sulfate and ferric iron reducing conditions;20 mg·L^-1, 50 mg·L^-1 and 80 mg·L^-1 substrates concentration levels.

采用正交试验法对BTEX各个组分在不同菌种、不同电子受体和污染物不同起始浓度的条件下生物厌氧降解效率进行研究。

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。