Following resolution, the following steps are performed: reduce the isomer to an alcohol, react the alcohol with triphenylmethyl chloride, ozonalyze the resulting reaction product, reduce the ozonalyzed product to yield a diol and react the diol with a methane sulfonyl compound to form-3-2-{(methylsulfonyloxy}ethoxy-4--1-butanol methane sulfonate.

拆分后，進(jìn)行下一步：將異構(gòu)體還原為醇国产XXXX在线观看免费视频，使醇與三苯基甲基氯反應(yīng)欧美xxxxA片，臭氧化所得反應(yīng)產(chǎn)物美女黄应用，還原臭氧化產(chǎn)物以得到一種二醇并使所述二醇與甲烷磺酰基化合物反應(yīng)以形成-3-2-{(甲基磺跫で槭悠涤谰迷谙撸基氧}乙氧基-4--1-丁醇甲烷磺酸酯国产首页在线。

A new process for the preparation of 5-bromo-vanillin with vanillic aldehyde as raw material,AlBr3 as activator,HBr and H2O2 as brominating agent and anhydrous alcohol as solvent was developed in this paper.

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The method was validated for acetylated peptides and allowed an assessment of even the basal protein phosphorylation of phenylalanine hydroxylase in intact cells.

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It was shown that under the optimal preparation conditions of 3% sodium alginate,3%CaCl2,4 h calcifying time,5 mL biomass,the cya...

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At the same time, the fouling mechanism of membranes given in this thesis can give a reasonable explanation on the change of membrane performance. Our results show that the magnetization of membranes can effectively improve the anti-fouling ability of the PAN- Fe_3O_4 membrane. The obtained result may give insight to the development of new membranes with a good anti-fouling performance in the filtration of blood solution. No chemical bond was found between PAN and Fe_3O_4 in the membrane at room temperature. The addition of Fe_3O_4 can improve the temperatures of dehydrogenated reaction and decomposition of PAN but dot change the glassy transition temperature. The resistance against acid is stronger than the resistance to base for a PAN- Fe_3O_4 membrane.

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Na-alginate was selected as an entrapping agent to immobilize ammonia-oxidizing bacteria in this experiment, designed to explore optimal entrapping condition and to compare immobilized bacteria with non-immobilized bacteria in ammonium removal efficiency.

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Under the optimal reaction conditions the acid value of the esterified production is the lowest,and the esterified degree is complete.

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This product is used for pricking and passivating large parts of the surface of stainless steel.The parts can also be soaked in the pricking fluid so that the stain-less steel will be rust-proof.

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Thirdly, the mechanism of extractant and diluent loss in aqueous phase was studied in both saponified organophosphorus acids and naphthenic acid extraction systems.

本文通過研究皂化有機(jī)磷酸、環(huán)烷酸從有機(jī)相到水相的轉(zhuǎn)移及水相中膠團(tuán)或o/w型微乳狀液的形成，證明了皂化酸性萃取劑和有機(jī)溶劑的水相流失與水相聚集體的形成有關(guān)JIZZ中国国产在线。

Calcium oxide and mineralized rubbish column were used to treat power plant boiler acid washing wastewater.

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