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乙二酸

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In the presence of acetic acid and polyethylene glycol, anthracene reacted with ammonium ceric nitrate and sodium bromate to form anthraquinone.

在醋酸、聚乙二醇存在下,蒽与硝酸铈铵和溴酸钠反应生成蒽醌,聚乙二醇作为相转移催化剂可以提高反应的选择性。

The results showed that V_2O_5/C catalyst exhibited obvious activity for glyoxal oxidation and high selectivity of glyoxylic acid.

在确定了催化体系中氧化产物的基础上,建立了比值导数波谱法同时分析乙二醛和乙醛酸,该法为乙二醛催化氧化过程的实时、快速分析提供了新的手段。

Glyoxylic acid can be obtained without pH regulation during the reaction, and glyoxylic acid can not be oxidize...

研究结果表明,乙二醛的催化氧化副产物甲酸对乙二醛和乙醛酸的分析没有干扰。

Polyethylene glycol monomethylether, isophorone diisocyanate and hydroxyl ethyl methacrylate were used as raw materials, the mixmonomer was synthesized.

采用聚乙二醇单甲醚、异氟尔酮二异氰酸酯和甲基丙烯酸β-羟乙酯合成混合单体。

Cyclohexanone ethylene ketal was synthesized from cyclohexanone and glycol in the presence of H3PW12O40/MCM-48. The factors influencing the synthesis of molar ratio of glycol to cyclohexanone, the quantity of catalyst and the reaction time were discussed and the best conditions were found out.

报道了以分子筛MCM-48负载磷钨酸(H3PW12O40/MCM-48)为催化剂,通过环己酮和乙二醇反应合成了环己嗣乙二醇缩酮,探讨了H3PW12O40/MCM-48对缩峒反应的催化活性,较系统地研究了酗醇物质的量比,催化剂用量,反应时间诸因素对产品收率的影响。

Triethyl orthoformate, industry 97 37%; diethyl malonate, industry 98%; acetic anhydride, reagent 97%.

原甲酸三乙酯,工业97 37%;丙二酸二乙酯,工业98%;醋酸酐,试剂97%。

The first committed step in fatty acid biosynthesis is the carboxylation of acetyl CoA to form malonyl CoA using CO2 in the form of bicarbonate HCO3-.

在脂肪酸的从头合成过程中,参入脂肪酸链的二碳单位的直接提供者并不是乙酰CoA,而是乙酰CoA的羧化产物——丙二酸单酰CoA(malonyl-CoA)。

The macromer, methoxy polyethylene glycol methacrylate, used for polycarboxylate based superplasticizer was prepared by esterification of methacrylic acid and methoxy polyethylene glycol.

以聚乙二醇单甲醚和甲基丙烯酸为主要原料,通过酯化反应制备聚羧酸系减水剂大单体聚乙二醇单甲醚甲基丙烯酸酯。

Polyurethane-acrylate Macromer was synthesized by IPDI, HEMA and PEG, and a new kind of transparent polymer was preparaed by the Macromer crosslinked.

利用异佛尔酮-二异氟酸酯、甲基丙烯酸-β羟乙酯、聚乙二醇合成了一种聚氨酯丙烯酸酯类大分子单体,并将其固化交联得到一种新型透明材料。

Methanol and ethylene glycol poisoning; Methanol and ethylene glycol are both metabolised by alcohol dehydrogenase, the same enzyme that metabolises ethanol, to formic acid and oxalic acid, respectively.

甲醇和乙烯乙二醇中毒;甲醇和乙烯乙二醇二者经过乙醇脱氢酶——代谢乙醇的同一代谢分别形成蚁酸和草酸。

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