查询词典 formaldehyde solution

Another reason for this increasing interest is that formaldehyde and acetaldehyde are more available than propylene.

另一个原因，这越来越感兴趣的是，与比丙烯，甲醛和乙醛更容易利用。

The synthesis of acrolein by means of the catalytic vapor phase condensation of formaldehyde and acetaldehyde was studied.

利用冷凝甲醛和乙醛的气相催化法，来研究丙烯醛的合成。

The human exposure levels of formaldehyde and acetaldehyde in hospitals were discussed.

对医院甲醛、乙醛在人体内的暴露水平做了讨论，与其他类似场所相比，医院的暴露风险相对较小。

Formaldehyde, acetaldehyde and acrolein are common aldehyde in the environment.

甲醛、乙醛和丙烯醛均为环境中常见的醛类。

Some by-products are benzene, acetone, xylene, formaldehyde, and acetaldehyde.

一些副产品都是苯、丙酮、二甲苯、甲醛和乙醛。

Copper was reduced by formaldehyde which was contained in the effluent of chemical copper plating , and EDTA in the effluent was reclaimed after acidify.

探讨了利用原化学镀铜废液中的甲醛将铜还原，后酸化回收 EDTA的新工艺。

B3LYP/6-311++G** calculations were carried out to study the trimethylamine catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde.

采用密度泛函DFT-B3LYP方法在6-311++G**基组下计算研究了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程，获得了两种反应通道(分别对应于顺式-丙烯醛和反式-丙烯醛)的势能面。

The optimized structures and energies of the reactants, intermediates, transition states and products of two reaction channels (corresponding to syn-acraldehyde and anti-acraldehyde) in gas or in methanol solvent were obtained. The potential energy profiles reveal the processes of the trimethylamine-catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde in gas or in methanol solvent at the microscope level.

通过研究，获得了三种情况下两种反应通道(分别对应于顺式-和反式-丙烯醛)中涉及的反应物、产物、中间体、过渡态的优化结构及其能量，并由此得到了反应的势能面图，在电子微观层次上揭示了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程。

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

In order to search for a suitable method for the tissue preservation and DNA isolation of marine animals, the adductor muscle of bay scallop was treated with different methods: frozen at -20 ℃, fixed with 70% ethanol and 10% formaldehyde more than 10 days.

以海湾扇贝为材料，研究了鲜活样品以及采用冷冻保存、70 %乙醇固定和10 %福尔马林固定等方法保存的闭壳肌样品用于DNA提取的不同效果，并分析了不同保存条件下所提得DNA用于RAPD扩增的结果。

Tom: You are right, he worked hard all the time.

你是对的。他一直都是努力工作。

Take shortcomings,failures,and mockings of others as commonplace and a drive to complete oneself,hold your own opinion over the evalution and disscution divested from others,afterwards sink into the state of eliminate mistakes if any or encourge oneself being not being influenced by the sayinngs of others or having no ideas to do.

把缺点、失败及别人的耻笑等看成是一种常事，当成完善自己的动力，对别人的评价和议论自己心中有主见，做到&有则改之，无则加勉&，不为人言所左右或无所适从。