查询词典 formaldehyde

It is reliable to use urea-formaldehyde resin to manufacture cotton stalk scrimber, and the density has direct influence on scrimber performance.

以脲醛树脂为胶黏剂生产棉秆重组材是可行的，板材密度对棉秆重组材性能有直接影响。

The paper studied the preparation of modified urea-formaldehyde resin adhesive with polyvinyl alcohol and melamine.

研究了聚乙烯醇和三聚氰胺改性脲醛树脂胶粘剂的制备工艺和配方。

Surface characteristics of rice straw fiber, such as wettability and free radical, have great effect on the properties of interface between rice straw fiber and urea-formaldehyde.

通过对稻秸原料进行水热、酸碱和冷等离子体预处理，分析了纤维表面的浸润性及表面自由基浓度的变化。

The synthetic technology of urea-formaldehyde resin with weak acidity initial condition

探讨了在弱酸性条件下合成低甲醛释放量的脲醛树脂工艺的可能性。

In this paper the synthetic technology for producing low toxic environmental protection type urea-formaldehyde resin adhesive was studied.

通过对低毒环保型脲醛树脂胶粘剂的合成工艺进行研究，得出的结论为按工艺条件，一次性加入甲醛后，用NaOH或NH_4Cl调节pH值、用聚乙烯醇作改性剂，在适当的温度下分批加入尿素，进行阶段反应，从而获得一种乳白色的胶粘剂。

We killed some mice at the day 6th , the others were continue to expose to formaldehyde and observe their estrous cycle. HE staining was used to study the pathological changes happened in ovarian tissue. Uranium acetate and lead acetate double staining was used to study the ultrastructure of oocyte. E2 and LH level in blood serum was measured by radioimrnunoassay reagent kit.

第6d处死一批小鼠，用HE染色观察小鼠卵巢组织的病理改变，用醋酸铀—醋酸铅双重染色电镜下观察小鼠卵母细胞超微结构的损伤；用GSH测定试剂盒测定小鼠卵巢组织中的GSH含量；用E_2和LH放射免疫分析试剂盒分别测定小鼠血清中E_2及LH水平；采用超排卵法，计数超排卵数并收集卵母细胞，于油镜下观察生殖细胞遗传物质的损伤。

Mesoporous tin oxide was synthesized by using cetyltrimethyl ammonium bromide or CTAB and Tween-20 as the template or hydrothermal process. Hollow tin dioxide micospheres were synthesized by using resorcinol-formaldehyde gel as the template or hydrothermal process. Thermogravimetric analysis, X-ray diffraction and electron microscopy have been used to characterize the materials.

本文分别采用十六烷基三甲基溴化铵模板法、CTAB和吐温20复合模板法及水热法来合成介孔氧化锡；用间苯二酚和甲醛凝胶模板法及水热法合成空心球氧化锡，并用热分析、X射线衍射、电镜等对以上材料作了形貌及结构表征。

It indicated that a part of novolac could be substituted with formaldehyde modified lignin resin which was destracted from waste water of sulphate pulping process.

结果表明，硫酸盐法造纸制浆废液中的木质素，经羟甲基化改性后，可在酚醛模塑料中，代替部分线型酚醛树脂。

Formaldehyde ; sodium hydrogen sulphite ; inhibitor

甲醛；亚硫酸氢钠复合物；抑制剂

Furniture and decoration materials and pollution (such as paint, plywood, shaving board of the Chinese containing formaldehyde, ethanol forms), and the construction of its own pollution (such as construction materials, chemical added), is the main source of pollution.

而装饰材料及家具的污染（如油漆、胶合板、刨花板等中含的甲醛、乙醇致癌物），与建筑自身的污染（如施工中添加的化学材料），是主要的污染源。

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。