Methylene diphenyl dicarbamate(MDC),an intermediate for the production of methylene diphenyl diisocyanate,was directly synthesized from dimethyl carbonate(DMC),aniline,and formaldehyde solution over the bifunctional H4SiW12O40-ZrO2/SiO2 catalyst.
研究了以H4SiW12O40-ZrO2/SiO2为催化剂,碳酸二甲酯(DMC)、苯胺和甲醛溶液为原料,一步催化合成二苯甲烷二氨基甲酸甲酯(MDC)的反应,考察了反应时间、反应温度和H4SiW12O40负载量等反应条件对催化性能的影响。
The DNA extraction,in General,from samples stored in formaldehyde solution is inefficient,especially extracted from small individual.
提取了保存于5%甲醛溶液中的单只中华哲水蚤基因组DNA。
Compared with traditional technique which takes o-chloroaniline and formaldehyde as materials,paraformaldehyde is used instead of formaldehyde aqueous solution for this method.
与以邻氯苯胺和甲醛水溶液为原料的传统工艺相比,用多聚甲醛代替甲醛水溶液,使多聚甲醛在酸催化下慢慢分解生成甲醛,可以保证与邻氯苯胺的反应在比较缓和的条件下进行,避免了大量树脂状物质的生成,提高了产品收率。
formaldehyde solutions(formalin)
甲醛溶液(甲醛水)
An aqueous solution of formaldehyde that is37percent by weight.
甲醛溶液，福尔马林甲醛的澄清水溶液，含有37％的甲醛
Chemical reagent-Formaldehyde solution
GB/T685-1993化学试剂甲醛溶液
Portable Formaldehyde Detector Based on MSP430 Microprocessor
基于MSP430单片机的便携式甲醛溶液浓度检测仪
The most basic of class of vaccines actually contains disease-causing microorganisms that have been killed with a solution containing formaldehyde.
最基本的一类疫苗实际包含已被甲醛溶液杀死的致病微生物。
The inactivation of enzyme by formaldehyde is a reversible reaction with remaining enzyme activity.
酶在低浓度甲醛溶液中的失活过程显示为可逆失活.
Results Irregular granules were seen in 10%formaldehyde solution, absolute alcohol and distilled water.
结果 10 %甲醛溶液、无水乙醇、蒸馏水中含不规则形的颗粒 ;
Investigation of Structure and Function Alterations in Rabbit Eyes after Little Dose Formaldehyde Injection;
小剂量甲醛溶液兔眼内注射对其结构及功能影响的研究
Standard method for hygienic examination of sulfur dioxide in air of residential areas-Forma dehyde solution sampling-pararosaniline hydrochloride spectrophotometric method.
居住区大气中二氧化硫卫生检验标准方法甲醛溶液吸收-盐酸副玫瑰苯胺分光光度法.
Test method for the viscosity of the dilute solution of polyformaldehyde resin
GB/T1847-1980聚甲醛树脂稀溶液粘度试验方法
EXPERIMENTAL STUDY ON FORMALDEHYDE IN THE AIR ABSORBED BY AQUEOUS SOLUTION
利用水溶液吸收空气中甲醛的实验研究
a 10% solution of formaldehyde in water; used as a disinfectant or to preserve biological specimens.
甲醛溶于水形成的浓度为%的溶液，用作消毒剂或用于保存生物标本。
Ehrlich's reagent
埃尔利希试剂（0.3%对二甲氨基苯甲醛的稀盐酸溶液）
Study on Mass Transfer of Oxidation-Extraction Process in Oxygen-Benzaldehyde-NaOH Aqueous Solution Gas-Liquid-Liquid System;
氧气—苯甲醛—NaOH水溶液三相氧化萃取过程传质的研究
Green environmental protection, harmful solvents are free such as dimethyl benzene, methanal ect.
绿色环保，不含二甲苯、甲醛等有害溶剂。
Preparation of Benzoic Acid and Benzaldehyde by the Oxidation Of Toluene in the Liquid Phase
甲苯液相氧化法制取苯甲酸和苯甲醛
A Theoretical Computation of Solvent Effect for H_2CO and F_2CO in the Various Solvents
甲醛和氟代甲醛在不同溶剂中溶剂化效应的理论计算
A waterborne multicolor paint is prepared by chitosan in acetic acid solution, mixing with short fiber and crosslinked by glutaric dialdehyde.
甲壳糖醋酸水溶液为成膜剂，掺入短纤维后用戊二醛交联得到多彩涂料。