查询词典 formaldehyde solution

Alkyl substituted imidazoles were synthesized by reaction of alkyl amines with glyoxal, formaldehyde and ammonia in methanol.

在对环境保护和资源的可持续利用倍受关注的今天，绿色化学是化学发展的必然趋势。

The guaiacol methods of synthesizing vanillin mainly includes: nitroso group method, Glyoxalic acid method, formaldehyde method, Reimer-Tiemann method, Trichloroacetaldehyde acetochloralb method, electrolytic oxidation method.

愈创木酚法合成香兰素的方法主要有亚硝基法、乙醛酸法、甲醛法、Reimer-Tiemann法、三氯乙醛法、电解氧化法，本文综述了愈创木酚法合成香兰素的研究进展，并对愈创木酚法合成香兰素提出了展望。

Using glyoxylic acid to replace the harmful chemical substance formaldehyde as a reducing agent, an copper layer was deposited on rosin substrate by this electroless copper plating technology.

用乙醛酸代替有害的化学药品甲醛作为还原剂，在树脂基材上进行化学镀铜。

The optimal pH and temperature were 12.5℃ and 40℃,respectively. The process is environmentally benign with no formaldehyde.Key words: glyoxylic acid;deposition rate;electroless copper plating

优化条件下，可获得结合力良好、表面均匀光亮的镀层，工艺中不使用甲醛，无污染，具有良好的环境效应及社会效应，应用前景广阔。

Using glyoxylic acid to replace the harmful chemical substance such as formaldehyde as a reducing agent, an electroless copper plating on difficulty deposited substrates was fulfilled, which including Al,Ti and wafers having TiN and TiSiN as the barrier layers.The surface morphologies and grain structures of copper deposits prepared were analyzed.

摘 要：采用乙醛酸代替有害的化学药品作为还原剂的化学镀技术，在工业纯铝片、工业纯钛片、以TiN作为扩散防护层的硅片和以TiSiN作为扩散防护层的硅片等难镀材料实现了化学镀铜。

Heterodon specimens was successfully extracted by the steps of removing the formaldehyde through improved gradual dehydration first and extracting the genomic DNA by the traditional phenol-chloroform method then. After primers designed, the PCR amplification was carried out, and a 205 bp of the control region of mtDNA from all of the ten specimens was successfully amplified.

本实验通过改进的酒精梯度浸泡法去除标本中的甲醛，然后用酚-氯仿抽提法成功地提取到了铜鱼标本的基因组DNA；设计引物后进行了线粒体和微卫星的PCR扩增，扩增产物经银染检测。

Heterodon specimens as successfully extracted by the steps of removing the formaldehyde through improved gradual dehydration first and extracting the genomic DNA by the traditional phenol-chloroform method then. After primers designed, the PCR amplification was carried out, and a 205bp of the control region of mtDNA from all of the ten specimens was successfully amplified.

本实验通过改进的酒精梯度浸泡法去除标本中的甲醛，然后用酚－氯仿抽提法成功地提取到了铜鱼标本的基因组DNA；设计引物后进行了线粒体和微卫星的PCR扩增，扩增产物经银染检测。

This paper reported the synthesis of 2-hydroxyl-1-naphthalene formaldehyde under microwave irradiation with 2-naphthol, hexamethylenamine, solvent of glacial acetic acide, catalysis of sulphuric acid, and discussed the influence of the time and the power of microwave radiation, the proportion and quantity of reagents to the synthetic yield.

利用微波技术，采用2-萘酚与六次甲基四胺为原料，冰乙酸作溶剂，在浓硫酸的催化下合成2-羟基－1-萘甲醛，并考察了微波作用的时间、微波辐射功率、反应试剂的组成与用量等因素对产物产率的影响。

In the mechanical test, 20 cadaveric humeri of children fixed with formaldehyde were divided randomly into 10 groups and the compressive, tensile and bending tests were conducted.

结果得出：①整骨试件不同，其断裂强度不同；髁上部的压缩、拉伸、弯曲强度低于骨干部和外科颈；断裂多在髁上部，且尺侧边缘骨皮质首先断裂。

By analyzing and researching the corrosion resistant mechanism of adsorption typal acidification corrosion inhibitor, taking single equational experimental method, making use of mannich reaction and using the hydrochloric acid as catalyst and the ethyl alcohol absolute as solvent, the new acidification corrosion inhibitor HZ-1 is synthesed by formaldehyde、hypnone、aromatic amines in the present research of this thesis.

本文通过对吸附型酸液缓蚀剂缓蚀机理的分析和研究，利用单因素实验方法，采用曼尼希反应，以盐酸为催化剂，无水乙醇为溶剂，用甲醛、苯乙酮、芳香多胺合成了新型酸化缓蚀剂HZ-1。

My father is over 60 years old, and he lifts weights every day.

我爸爸六十多岁了，他每天都练习举重。

Then in a serious tone she declared:"It doesn't pay, dear boy, to look like a ninny with one's wife the first night."

两眼湿润了，她把身子蜷得很小，这样似乎可以更好地闻闻自己。