查询词典 ion exchange

The preparation method comprises the steps as follows: houghite ZnAl-NO3-LDHs is taken as the precursor, ion exchange method is adopted to insert the 2- naphthylamine-1, 5-disulfonic acid to the interlayer of ZnAl-NO3-LDHs, thereby assembling and acquiring the ZnAl-NADA-LDHs of good crystalling phase structure and splendid performance.

超分子结构2-萘胺-1，5-二磺酸插层材料，简写为ZnAl-NADA-LDHs，其分子式为：[Zn 2 1-x Al 3 x 2 ](C 10 H 7 NO 6 S 2 ) 2- x/2 mH 2 O，是以水滑石ZnAl-NO 3 -LDHs为前体，采用离子交换法将2-萘胺-1，5-二磺酸插入到ZnAl-NO 3 -LDHs层间，组装得到晶相结构良好、性能优异的ZnAl-NADA-LDHs。

The study indicates that sea water and brine intrusion processes have different hydrochemical features;and that ion exchange and absorption actions between water and aquifer produce great influence to the intrusion.

研究表明，现代海水、卤水在入侵过程中的地下水水化学特征有明显不同；地下水与含水岩层间的离子交换与离子吸附作用对咸水的地下入侵过程产生重要影响。

Ion Exchange Reactions of U,Cr,Ca,Mg with Hydrous Titanium Oxide in Seawater

海水中U、Cr、Ca、Mg与水合氧化钛的离子交换反应

Preparation of hydrous titanium oxides by ion-exchange and separation of impurities were studied.

3液固相离子交换制备偏钛酸并高效分离杂质离子。

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其中泵类产品：潜水泵、喷射泵、排水泵、污水泵适用于民用；端吸泵、中开泵、增压泵、消防泵适用于工业和商用；离心泵、隔膜泵、柱塞泵适用于农业；脱盐泵、往复泵、轴流泵适用于市政建设；舱底泵、冷却泵、污水泵、高压冲洗泵、饮用水泵适用于海运；净化与过滤设备：FLECK阀门适用于锅炉软水系统、反渗透系统的预处理装置、家用及商用软水系统；STRUCTURAL树脂罐适用于砂滤、商用软水器、离子交换、多介质过滤、活性碳过滤；CODELINE膜壳适用于海水、苦、咸水淡化工程、电厂锅炉补给水工业处理、化工行业工艺用水、电子、半导体行业的超纯水处理、冶金、轻工业、电镀等行业的废水处理、食品饮料、卫生医疗；泳池及水景设备适用于水疗、游泳池、大型浴场等等。

After extraction by ethanol and purification by cationic ion-exchange column, a method of using reversed-phase high-performance liquid chromatography and precolumn derivatization with o-phthalaldehyde and 9-fiuorenylmethylchloroformate is employed for determination of free amino acids in tobacco . This method assures that amino acids with amino and imino groups can be determined simultaneously. The results of duplication experiment and recovery experiment are acceptable.

本试验用乙醇提取烟叶中的游离氨基酸，并用阳离子交换树脂纯化，再用邻苯二甲醛、氯甲酸芴甲酯联合柱前衍生、反相高效液相色谱分析测定了烟叶中的游离氨基酸，该方法能同时测定烟叶中的带氨基和亚氨基基团的氨基酸，并且分析方法的重现性和回收率均令人满意。

The etherification reaction of methanol and isoamylene was investigated in an internal recycle gradientless reaction with an ion exchange resin (NKC-9) as catalyst.

采用国产大孔磺酸树脂(NKC-9)，在无梯度反应器内对异戊烯与甲醇醚化反应进行了研究。

Synthesis of isobornyl methacrylate by using macroporous sulfonic ion exchange resin as catalyst has been realized.

以大孔强酸性高于交换树脂为催化剂合成甲基丙烯酸莰醇酯。

The isoelectric point estimated by ion exchange chromatography was 7 – 9 and below 7.

以阴离子交换层析估计 Chi A 之等电点约在 7 – 9 之间，Chi B 及 Chi C 等电点在 7 以下。

The new trends and processes of drinking water treatment technologies developed glo-bally in recent years were described, and the key future technologies identified on the third IWA Leading-Edge Conference were introduced, such as advanced oxidation processes (TiO2/UV and H2O2/UV), membrane/UV disinfection, membrane separation, magnetic ion exchange and so on.

阐述了近年来全球饮用水处理技术发展的一些新动向、新工艺，着重介绍了国际水协第三届&前沿技术&国际会议确定的未来饮用水处理技术的研发与应用。已被确定的未来主导技术有高级氧化技术(TiO2/UV光催化氧化工艺与H2O2/UV处理工艺)、消毒技术、膜分离技术以及电磁离子交换技术等。

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。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷