查询词典 methanal

The optimun technological conditions were studied on the synthesis of 9-flourenylmethanal by the reaction of flouren and ethyl formate , and the synthesis of 9-flourenylmethanol by the reaction of 9-flourenylmethanal and methanal with sodium ethylate as catalyst.

研究了乙醇钠为催化剂，由芴与甲酸乙酯合成芴甲醛，再由芴甲醛与甲醛合成苯甲醇的工艺条件，结果表明：合成芴甲醛时，当芴为 16g时，催化剂乙醇钠 4 。

A quick detection reagent for methanal is described in the paper.

食品中甲醛的含量超过标准，有碍人体健康，对食品中甲醛的检测有多种方法，这里介绍了一种快速检测甲醛的试剂。

To introduce an new technology of DMC which is composed by urea and methanal .

介绍了由尿素醇解制碳酸二甲酯新技术中试研究结果，重点分析了采用该技术建设千吨级装置的经济性。

Using methanal, ethanedial and glutaraldehyde as crosslinker, three different kinds of chitosan resins were prepared.

从纯技术角度来讲，整个疗法的核心是高效、大容量、具有良好血液相容性吸附剂的研制。

This paper analyzes the origins of the indoor methanal and benzene and other pollutants,discusses the influence of these pollutants on the indoor air and the harmfulness of these pollutants on the human health,and briefly introduces some methods for treating indoor air pollution.

分析了室内甲醛、苯及其他污染物的来源，讨论了这些污染物对室内空气的影响及对人体健康的危害，概要介绍了室内空气污染治理的方法。

Simple examples of aldehydes are methanal and ethanal (acetaldehyde, CH3CHO).

简单的醛有甲醛和乙醛（ CH3CHO ）。

Samples were extracted with methanal, separated by capillary column and determined with FPD detector.

采用气相色谱法测定了90%敌百虫晶体在金银花中的残留动态，金银花样品用甲醇提取，毛细管柱分离，FPD检测器测定。

Results show that the yield of HEDTMP is more than 77% when the mole ratio of catalyst HC1 to HEDA [N-(2- hydroxyethyl) ethlenediamine] is more than 3 and methanal to HEDA is more than 6 after the process of reaction at 80?

结果表明，在催化剂HCI与羟乙基乙二胺摩尔比大于3，甲醛与羟乙基乙二胺摩尔比大于6时，80℃反应2h可获得收率大于77％的HEDTMP；经IR、~1H—NMR和元素分析确认合成是成功的。

A novel design of reference electrode was developed to in-situ measure the polarization of direct methanal fuel cell.The effect of humidification conditions of electrolyte on the reference electrode potential and its potential stability was investigated.

提出了用于原位测量直接甲醇燃料电池极化的参比电极的结构设计，并考察了电解质的润湿程度对参比电极的电位及其电位稳定性的影响。

Property:The product is a kind of colourless to light-yellow viscid fluid or white wax solid.It can dissolve in organic reagent like water,alcohol etc.It gives off methanal upon heating.so it is a good methanal donator,and is used in conperation of RS、RH and RE to get a good adhensive result.

性状：无色至微黄色粘稠液体或白色蜡状固体，能溶于水和一般有机溶剂，加热能释放出甲醛，是一种良好甲醛给予体，与RS、RH、RE配合使用，能起到良好的粘合效果。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。