查询词典 urea

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。

To Al2 (SO4) 3 and different amounts of urea as raw material, two-block copolymer P - b-P the existence, Microwave prepared by the spherical coral Boehmite, 800 ℃ calcining, Alumina is a powder.

以Al2(SO4)3和不同量的尿素为原料，两亲嵌段共聚物P-b-P的存在，利用微波法制备出珊瑚球状的勃姆石，经800℃煅烧后，得到了氧化铝粉体。

Their study revealed an advantage to deep-placed plastic coated urea compared to a top-dressing application of the same product.?

他们的研究表明塑料包衣尿素深施优于表施。

Mesoporous tin dioxide (SnO2) was synthesized by thermal decomposition of the precursor obtained via a solvothermal method in the presence of SnCl4·5H2O, urea and ethanol.

采用溶剂热方法，以SnCl4·5H2O/尿素/乙醇三元体系合成了具有特定结构的前驱体，该前驱体经焙烧后得到了具有海绵状结构的介孔SnO2。

Such as PVC, urea, the anhydride, caustic soda production plant, or external leakage demanding medium, such as HF, such as phosgene.

如PVC、尿素、本酐、烧碱生产装置中，或对外泄漏要求高介质，如HF，光气等。

Results showed that NBPT mixed proportionally with urea increased the soybean root vigor, root nodule number and weight, the root nitrogen fixation activity,and therefore the root growth was increased by a high content of N in the soybean plant.

结果表明，NBPT提高了大豆整个生长期的根系活力，对根瘤固氮酶活性有促进作用，根瘤数量和重量都有增加，因而大豆植株的含氮量也随之增加，根系生长得到促进。

Soil enzyme and microflora rhizosphere effect of urea fertilizer treatment and biological fungus fertilizer treatment was less than organic fertilizer treatment.

施用有机肥处理对土壤微生物和土壤酶根际效应值影响最明显，菌肥处理影响最小。

Ingredients: ginseng root extract, lavender extract, gingko, peony bark, tea tree oil, taraxacum, red-rooted salvia, forsythia, honeysuckle, Philippine violet herb extract, vitamin D, HA, squalane, PEG-20 methyl glycoside sesquistearate, mamushi oil, bi imidazolidinyl urea etc.

成 分：去离子水、人参根提取物、薰衣草提取物、银杏叶提取物、丹皮、茶树油、蒲公英提取物、丹参提取物、连翘果提取物、金银花、紫花地丁、水杨酸、羟乙基纤维素、双咪唑烷基脲、透明质酸。

Ingredients: ginseng root extract, lavender extract, gingko, peony bark, tea tree oil, taraxacum, red-rooted salvia, forsythia, honeysuckle, Philippine violet herb extract, vitamin D, HA, squalane, PEG-20 methyl glycoside sesquistearate, mamushi oil, bi imidazolidinyl urea etc.

成 分：去离子水，丙二醇，甘油，矿油、矿脂、角鲨烷，甲基葡萄糖倍半硬脂酸酯，PEG-20甲基葡萄糖倍半硬脂酸酯，褐斑蝮蛇油、人参根提取物、薰衣草提取物、银杏叶提取物、丹皮、茶树油、蒲公英提取物、丹参提取物、连翘果提取物、金银花、紫花地丁、卡波姆，尿囊素，双咪唑烷基脲，透明质酸。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。