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The influence of surfactants CTMAB and CPC on the absorption spectra, calibration curve, and acidity of Al-CAS colouring system was studied.

对表面活性剂[十六烷基三甲基溴化铵和氯化十六烷基吡啶]在吸收光谱、工作曲线和显色酸度等方面对铝-铬天青S显色体系的影响进行了研究。

Low molecular weight mannuronic acid, guluronic acid and κ carrageenan were prepared from algin and carrageenan by the acid hydrolysis method, and their weight average molecular weights and the distribution widths of molecular weight were determined by high performance gel permeation chromatography respectively.

本文以褐藻胶和κ-卡拉胶为原料通过酸水解分别获得了低聚的甘露糖醛酸、古罗糖醛酸和低聚κ-卡拉胶,并采用 HPGPC法测定了这 3种低聚糖的重均分子量。在此基础上再经硫酸酯化和成盐修饰制备了各自的硫酸酯碱式铝盐。

Results showed that using aluminum trichloride combined catalyst under the conditions of a catalyst dosage of 5%, a benzene/olefin molar ratio of 8, a reaction temperature of 60℃ and a reaction time of 6 h, the yield of alky-benzene reached 19.6% and the quality of the obtained alkylate was significantly improved as compared with coker gas oil.

结果表明,采用三氯化铝复合催化剂,在催化剂质量分数为5%、反应温度60℃、苯烯摩尔比为8、反应时间6 h的条件下,烷基苯收率达到19.6%,烷基化油的质量明显优于焦化柴油。

And have their own spray, spray painting, electroplating, aluminum oxide, phosphating plant.

并拥有自己的喷塑,喷漆,电镀,铝氧化,磷化车间。

The activity of the co-catalysts consisting of H form zeolites ( HY, H-β and HZSM-5) and SnO in the reaction of anisole with acetyl chloride mainly depended upon the SiO2/Al2O3 molar ratio of the zeolite used.

由H型沸石(HY和H-ZSM-5沸石)和SnO组成的复合催化剂在苯甲醚与乙酰氯的酰化反应中的催化活性主要取决于所用沸石的硅铝比。

Activated alumina is being used to remove fluride and arsenate from drinking water,particularly in water total dissolved solids on a poin of use,poe and municipal scale.

活跃的铝被用来去除饮用水中中的氟化屋,特别是溶解所有的固体,在点使用,家庭使用和地方的尺度上。

Part I, the Friedel-Crafts acylation on DAA and methyl dehydroabietic acid was carried out with acetyl chloride, benzoyl chloride or phthalic anhydride as acylating regents, anh- ydrous aluminum chloride as catalyst and with different solvents to compare with, we have got t- hree new compounds.

第一部分,分别以脱氢松香酸和脱氢松香酸甲酯为底物,乙酰氯、苯甲酰氯、邻苯二甲酸酐为酰化试剂,无水三氯化铝作催化剂,采用不同的溶剂及反应条件进行傅克酰基化反应,得到3个新化合物。

Since 2002, the company has developed various types of more than 20 kind of the dry and wet type of sandblast machine altogether (aluminium quality, copper, iron, gather urethane sandblast machine), more than 100 kind of nuzzle (including in wolfram steel, carbonization boron, carborundum, compound pottery and steel nuzzle), and other many kinds of sandblasting machine fittings, the great one has met lots of sandblast machine factory and sandblast sales departments to many kinds of demands for sandblast machine.

从2002年开始,公司共开发了二十几种各式干湿型喷砂枪(铝质,铜质,铁质,不锈钢,聚氨酯喷砂枪),一百多种各规格喷咀(钨钢,碳化硼,碳化矽,复合陶瓷及钢质喷咀)以及其他多种喷砂机配件,极大的满足了各喷砂机械厂及喷砂销售部对多种喷砂配件的需求。

GaN and AlN films were grow on (111) Si substrate by admittances of trimethylgallium and ammonia (NH3) at 1000℃.

中文摘要氮化镓和氮化铝薄膜成长在(1 1 1)矽基材上,在1000℃时通入TMGa和NH3。

The ionized tracks are measured by optical probing technique. Collimated ionization tracks lasting for 60 picoseconds and extending 150 to 300 micrometer in length and 8 micrometer in diameter are observed.

实验观察到了在镀铝膜石英玻璃靶中在激光入射方向近似各向同性的辐射热传导,并在其前端有几条离化径迹,这些离化径迹是相互平行且等间距的,径迹之间的间距约13微米,其宽度约8微米,所观察的径迹从产生到消失的时间约60ps,在这个时间段内径迹的长度从 100-300微米变化。

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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

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