查询词典 formaldehyde

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。

The degraded effect of methal ion doped TiO2 to formaldehyde was prominent, but it was inapparent to VOCs.

掺杂金属离子对于甲醛的降解效果较为明显，对VOCs降解不明显。

The action of anti-dropping by adding line phenolic-formaldehyde resin into PE-IFR was studied. Configuration and structure of intumescent char was observed with SEM and the mechanism of anti-dropping was discussed.

考查了线型酚醛树脂对聚乙烯膨胀阻燃体系的防熔滴作用，并通过扫描电镜观察膨胀炭层的形态和结构，对线型酚醛树脂的防熔滴机理进行了探讨。

One route was that the amino-groups on the silica gel were transformed to tertiary amines by Eschweiler-clarke reaction that amine-groups react with formaldehyde and methanoic acid to prepare tertiary amines; the silica gel intermediates with tertiary amine groups reacted with chorohydrocarbons to prepare insoluble silica gel quaternary ammonium salt bactericides. Another route was that the amino-groups on the silica gel reacted with excessive chlorohexadecane; the preparing intermediates were quaternized with iodomethane to obtain insoluble silica gel quaternary ammonium salt bactericides.

一条路线是根据埃施韦勒-克拉克(Eschweiler-clarke)胺甲基化反应，进行胺基叔胺化反应，制成带有叔胺官能团的硅胶中间体，此中间体上的叔胺与卤代烷反应生成杀菌活性官能团季铵盐，制成硅胶类水不溶性季铵盐杀菌剂；另一条路线是带有胺反应活性中心的硅胶与过量正氯代十六烷反应，得到的中间体再用碘甲烷季铵化，得到最终产品——水不溶性季铵盐杀菌剂。

It is found that UIFR with softening point of 90℃, OH value of 32mg KOH/g andM of 377 g/mol is synthesized when molar ratio of isobutyraldehyde to formaldehyde is 1.5, molar ratio of aldehyde to urea is 6, vacuum distillation temperature and time is 140℃ and 1 h respectively. The terpolycondensate is soluble in most solvents, of paints and exhibits excellent yellowing-resistance.

结果表明，在异丁醛、甲醛摩尔比为1.5，醛、脲摩尔比为6，真空蒸馏温度为140℃、时间为1h的条件下，合成出的UIFR软化点为90℃，羟基值为32mgKOH/g，M为377g/mol，且树脂具有良好的溶解性和杭黄变性。

Several routes for synthesizing methyl isopropyl ketone were introduced, including the main methods based on isobutyl aldehyde-acetic acid, isobutyric acid -acetic acid, methyl ethyl ketone-formaldehyde and isoprene.

介绍了甲基异丙酮的多种合成路线，主要有异丁醛-乙酸法、异丁酸-乙酸法、甲基乙基酮-甲醛法和异戊二烯法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。