甲基

With regard to anion exchange membranes,the traditional preparation method involves a much complicated process—chloromethylation,in which the commonly used chloromethyl methyl ether and bis-chloromethylether are now considered carcinogens.Therefore,it is necessary to develop new routes to prepare anion exchange membranes without such chloromethylation process.As for cation exchange membranes, mostly-perfluorinated sulfonic acid ionomers,such as Nafion~?

对于强碱性的阴离子交换膜的制备，由于传统路线中的卤甲基化步骤中不可避免的采用强致癌物质二氯甲醚，因此无论是从经济成本还是环境保护方面，开发不采用氯甲基化步骤的阴离子交换膜制备方法是目前的一个迫切要求。

The investigation of cells of bronchial lavages with lung cancer showed hypermethylation of at least one gene in squamous cell carcinoma, adenocarcinoma, small cell lung cancer and adenosquamous carcinoma is 17/23(73.9%),13/20(65.0%),4/5 and 2/3, respectively.

51例肺癌患者中，支气管灌洗液和上清研究过甲基化结果如下：对灌洗液细胞进行三种基因过甲基化研究诊断鳞癌、腺癌、小细胞癌和腺鳞癌的阳性比例分别为17/23(73.9%)，13/20(65.0%)，4/5，2/3。

The synthesization technics of MPEG- MAA was studied in this paper,which is an important intermediate used for preparation of polycarboxylate superplasticizer.

本文对制备聚羧酸系减水剂的重要中间体——甲基丙烯酸聚乙二醇单甲醚酯的合成工艺进行了研究，考察了反应时间、催化剂对甲苯磺酸的用量、阻聚剂对苯二酚的用量、反应温度及甲基丙烯酸与聚乙二醇单甲醚的用量比对酯化率的影响。

It discloses four kinds of diamino monomers such as 1, 4-(4- amnio- 2- trifluoromethyl- phenoxy)- 2-(3'-methyl phenyl)benzene containing fluorine, ether linkage and benzene side chain.

具体公开了四种含氟、醚键和苯侧基的1，4-(4-胺基-2-三氟甲基-苯氧基)-2-(3'-甲基苯基)苯等二胺基单体。

A type of modified methyl benzene sulfonic acid sodium salt was synthesized by Friedel-Crafts reaction,knoevenagel reaction and sulfonation reaction with methyl benzol as row material.

以甲基苯为初始反应物，通过付-克反应，knoevenagel反应，磺化反应，最后合成一种改性甲基苯磺酸钠。

In this study, the degradation of dyes (methylene blue, methyl orange, and indigo) in water by means of photocatalytic oxidation was studied.

故本研究探讨以光催化的方法将水中的染料－亚甲基蓝、甲基橙及靛青等予以破坏、降解。

The experiment research shows that the Cu2O catalyzed by visible light make the methylene blue and methyl orange to degrade more than 90%, and the Cu2O can be used for several times.

第三、四章中用氧化亚铜进行光催化活性研究，试验表明在可见光照射下，氧化亚铜能使亚甲基蓝和甲基橙溶液经过一段时间降解达到90%以上；并且氧化亚铜能重复使用几次。

Experiments of photobleaching methyl blue show that the TiO2/Pt/TiO2 film exhibits a significant photocatalytic activity of 18.1% under visible light illumination when the decomposition of methyl blue is deducted.

在可见光光降解甲基蓝的实验中，扣除甲基蓝自身的分解，TiO2/Pt/TiO2多层纳米复合薄膜2h后的光降解率为18.1%。

The methylene blue, methyl orange, and indigo in water can also be decomposed respectively by the TiO2 thin films prepared at the same acetylacetone/titanium isopropoxide ratio.

以同样的最佳配制条件所制得的二氧化钛光触媒薄膜，亦可成功的将水中之亚甲基蓝、甲基橙及靛青等染料予以降解破坏。

It is found that TiO2/pillared MMT (TiO2/MMT) composite catalyst exhibits the best degradation activity to methylene blue and methyl orange compared with other semicondutors/MMT, such as SnO2/MMT, Fe2O3/MMT and Cu2O/MMT with different energy gaps that is closely correlated with the formation of stable pillar stucture and appropriate energy gap in the TiO2/MMT.

在对具有不同能带宽度的TiO2、SnO2、Fe2O3和Cu2O四种半导体/蒙脱土复合催化剂的研究中，发现TiO2柱撑蒙脱土(TiO2/MMT)对亚甲基蓝和甲基橙有最好的光催化降解活性，这是与其形成稳定的层柱结构和TiO2具有合适的能带宽度密切相关的。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。