查询词典 acid reaction

The research used microwave power 600W,and S/L is 1/10, with the suitable microwave operation condition (nitric acid concentration 9.0 mole/L, digesting time 8 minute, and digesting temperature 140 ℃), by microwave digestion lead leaching rate is 94.11%, if it used microwave power 600W,and S/L is 1/10, with the best microwave operation condition (nitric acid concentration 0.8 mole/L, digesting time 6 minute, and digesting temperature 120 ℃), by the result of study, after Microwave Digestion Treatment, the TCLP leachate of lead in reaction ash might could be reduce to 4.83 mg/L from 7.10 mg/L, and the TCLP leachate could keep under the regulation control standards.

本研究以微波功率600W、固液比1/10，在最适微波条件下(硝酸浓度9.0M、消化时间8分钟、消化温度140℃)，铅的微波消化溶出率为94.11％。在微波功率600W、固液比1/10，以微波最佳条件(硝酸浓度0.8M、消化温度120℃、消化时间6分钟)，经微波消化处理后，其铅TCLP 溶出量由7.10 mg/L降为4.83 mg/L，已能符合法规管制标准值。在此最佳微波条件下，对於铅TCLP 削

In the fourth chapter , we studied the resonance light scattering spectral characteristic of patent blueⅤ- Cetyltrimethyl ammonium bromide-nucleic acid system, and the elementary reaction mechanism with absorption spectra method and 1H NMR spectra method. Another new determination method of nucleic acid at nanogram level was established.

第四章研究了五号专利兰-十六烷基三甲基溴化铵-核酸体系的共振散射光谱特征，并结合吸收光谱法、核磁共振光谱和一系列条件实验探讨了它们的作用机理，建立了一种测定纳克级核酸的新方法。

In this dissertation, preparation of polysubstituted ethene and heterocyclic compounds based on 2-hydroxyalkyl phenyl selenides andα-phenylselenopropionic acid reagents were further investigated as follow: Firstly, O-ethyl-O-vinyl phosphonates were prepared in a one-pot, two-step transformation by Mitsunobu reaction of 2-hydroxyalkyl phenyl selenides with monoethyl esters of phosphonic acid in the presence of diethyl azodicarboxylate and triphenyl phosphine (PPh3) followed by oxidation-eliminatio...

中文摘要：本文主要进一步探索了2-羟基烷基苯基硒醚、α-苯硒基丙酸试剂在制备多取代乙烯和杂环化合物反应中的应用，具体研究内容和结果如下：一、在偶氮二羧酸乙酯和三苯膦(PPh3)存在下，苯基-2-羟基烷基硒醚和O-乙基膦酸单酯发生Mitsunobu反应，无需分离和纯化反应中间体，直接使用30 %的双氧水进行氧化-消除反应，提供了&两步、一锅&合成O-乙基-O-乙烯基膦酸酯的新方法，该方法反应条件温和，操作简便，产物收率良好(76-82 %)。

METHOD:Venlafaxine was synthesized by steps of etherification,acid chloridization,amidation,Grignard reaction,reduction,salifying from 4-hydrophenylacetic acid.

该化合物以对羟基苯乙酸为原料，经醚华、酰氯华、酰胺化格氏反应、还原、成盐等步骤制备而成。

With the aid of 〓P NMR examination for the process and ESI-MS/MS analysis of the derivatized products from the reaction intermediate, it is found that the corresponding phosphoryl chloride is generated after mixing the hydrogen phosphonate derivative with chlorodiisopropylamine, and they react with amino acid, amino acid methyl ester, dipeptide methyl ester or N-methyl imidazole carboxyl alkyl diamine respectively to form the desired products.

利用〓P NMR对反应过程监测以及对反应中间体衍生化后产物的ESI-MS／MS检测分析发现，氢亚磷酸二酯与氯代二异丙胺反应首先生成了磷酰氯中间产物，它继续与氨基酸、氨基酸甲酯、二肽甲酯、1-甲基咪唑-2-酰基烷基二胺等反应生成了目标产物。

The preparation method determines the optimized process of the lactide reaction based on oil return-service, prepares the low/zero trans fatty acid base oil, so as to reduce the content of trans fatty acid in oil products, lay foundation for the development of the base oil of margarine and shortening to the nutrition and health direction, and help the development of the special oil industry of our country.

本发明在油脂复配基础上，确立交酯反应的优化工艺，制备低/零反式脂肪酸基料油，以降低油脂产品中的反式脂肪酸含量，为人造奶油、起酥油的基料油向营养健康方向发展奠定基础，有利于我国专用油脂产业的发展。

Six carboxyl acids DEMB was produced with Michael Reaction using triethylamine as alkaline catalyst and solvent, malonic acid and itaconic acid as raw materials.

以三乙胺为催化剂和溶剂，衣康酸和丙二酸为原料，采用迈克尔加成反应合成了含有6个羧基的多元羧酸DEMB。

Esterification of acetic acid with isoamyl alcohol catalyzed by ferric chloride was studied,and effect of different factors such as reaction time,dosage of catalyst and ratio of acetic acid to isoamyl alcohol on the yield of isoamyl acetate was carefully examined.

研究了以三氯化铁为催化剂乙酸与异戊醇的酯化反应，考察了反应时间、催化剂用量、醇酸摩尔比等因素对乙酸异戊酯收率的影响。

The influence of Fmoc-protected amino acid, substitution and particle size of Wang resin and stirring modes on the condensation reaction efficiency of Fmoc-protected amino acid and Wang resin were studied.

研究了保护氨基酸、Wang 树脂取代度、树脂粒度、搅拌方式对Fmoc-氨基酸-Wang树脂连接效率的影响。

Maleopimaric acid can be synthesized by Diels-Alder reaction from rosin and maleic anhydride by phosphato-molybdic acid .

以杂多酸磷钼酸为催化剂合成了马来海松酸。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。