查询词典 formaldehyde

According to the Mannich-Reaction, a kind of chelating flocculant grafted with diethylene triamine was prepared from polyacrylamide, formaldehyde and diethylene triarmne.

研究了以聚丙烯酰胺、甲醛、二乙烯三胺为原料，按照Mannich反应机理制备部分胺化接枝型螯合作用絮凝剂及其从水中除铅性能。

During the process of formaldehyde degradation, as the residence time increased,η increased. After 0.6 s, the increase of η became unconspicuous, and the suitable residence time was

降解过程中，气体流量Q对甲醛的净化效率η也有较大的影响，随着Q的增加，η下降明显。

Other potential indoor sources of formaldehyde include cigarette smoke and the use of unvented fuel-burning appliances, such as gas stoves, wood-burning stoves, and kerosene heaters.

其他潜在的室内甲醛的来源包括香烟烟雾和无排气管燃油燃气燃烧器具，如火炉，烧木柴的炉子，使用和煤油炉等。

We anticipate the demand of formaldehyde will up to 2,930,000 tons, and 1,320,000 tons of methanol will be consumed;② At present, the acetic acid mainly produced by food zymotechnics or ethane in our country, along with the development of synthesizing acetic acid process with methanol, the demand of methanol will increase rapidly.

预计2010年甲醛需求量将达到293万吨，届时消费甲醇达132万吨；②目前我国醋酸生产多采用粮食发酵法或乙烯法，随着甲醇羰基合成醋酸工艺的发展，对甲醇的需求将迅速增加。

Bamboo charcoal able to sbsorb bad chemistry matter in the air, as chlorid, sulfid, formaldehyde, remove bad smelly and adjust humidity. If you but them into water, they also will adsorb aquatic chlorin and impurity.

这些微细的孔道具有超强的吸附能力，可以吸收空气中有害的化学物质如氯化物、硫化物、甲醛，除去臭气异味并可调节空气中的水分子，达到除溼和调湿的功能，若置於自来水中则可以吸附多馀的氯和杂质而使水质更加甘甜爽口。

The catalytic activity depends on the size,distribution and amount of the loaded platinum microparticles,as well as on the concentration of formaldehyde and the temperature of electrocatalytic oxid...

铂微粒的大小、分布和载量，甲醛的浓度，电氧化温度等因素对电催化作用均有影响

In this study, three model compounds of urea-formaldehyde resin, such as methylene diurea, Uron and tetrahydro-5-ethyl-2(1)-s-triazone, were synthesized.

本工作合成了脲醛树脂模型化合物亚甲基二脲、Uron和5-乙基-2(1)-s-四氢三嗪酮，并测定了它们在pH=4和80℃温度下的水解率。

The structure and the stability during storage of the uron type urea-formaldehyde resin adhesive was studied with dynamics viscosity measure and the FTIR and DSC analysis.

用FTIR、DSC和动力学粘度测量的方法对糠醛型脲醛树脂胶粘剂结构及贮存期间稳定性进行了研究。

This paper prepared three types of Uron resin according to different kind of synthesis processes, and then obtained several mixed urea-formaldehyde resin sby mixing Uron resins with normal UF resins at different experiment conditions.

以不同工艺制备了三种含尤戎结构的脲醛树脂，通过其与普通脲醛树脂的混合制得多种混合脲醛树脂。

The uron content was determined and the effects of pH value, temperature, reaction cycle and catalyst species on the Uron content were also discussed by FTIR quantitative analysis by uronizing urea-formaldehyde derivatives at the beginning of the reaction before the synthesis of UF resin.

采用在脲醛树脂合成初期对尿素－甲醛衍生物进行Uron化反应后，再进行UF树脂合成的技术方法，通过FTIR定量分析，研究了不同pH值、反应温度、反应时间及催化剂种类对尿素与甲醛成环化反应的Uron相对值的影响。

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。