查询词典 urea-formaldehyde

Fertilizer-grade urea is a water-soluble, acid-forming material containing about 45 per cent N.

肥料级尿素是水溶性酸性物质。

For the high affinity sites, binding constant decreases with the decrease of the alkyl chain lengh in the surfactants, but for the low affinity sites, binding constant increases and are not distinct when the alkyl chain is dedocyl. The binding sites are related to the alkyl chain lengh, not for the number of hydrophile groups and temperature.Isothermal titration calorimetry has been used to observe the enzyme-catalyzed hydrolysis reaction of urea.

对于高结合位点，结合常数随疏水碳链长度的减小而减小；对于低结合位点，结合常数随疏水碳链长度的减小而增大，相应的当碳链减小至C12时，低结合位点不明显，结合位点数可能只与碳链长度有关，随亲水头基和温度变化不明显。

Its leading indicators such as connect performance and price are equal to the ones of urea aldehyde resin glue that uses extensively at present. It can meet well the existing wood-based plate production technology.

且胶接性能、价格等主要指标与目前广泛使用的脲醛树脂胶相当，可很好地适应现有的人造板生产工艺。

This was because the blood urea nitrogen content of these sows was significantly lower and the triglycerides, cholesterol and creatinine contents of the blood of the sows were significantly improved (P.0 1). The physiological and biochemical parameters of milk of the sows fed diet containing alfalfa meal and fat milk protein%, milk fat%, and lactose% significai ty higher than those fed no alf~lfa meal and fat (PKO.0 I).

这可能是由于添加一定比例的苜蓿草粉和定量脂肪（1.6％）可以显著地降低血液中的尿素氮含量，从而显著提高血液中的胆固醇、甘油三酯、肌酐的含量以及碱性磷酸酶的活性（P＜0.01），并对猪乳脱脂乳清的理化成分有显著的改善（P＜0.01），从而显著地提高了猪乳中的乳蛋白、乳脂和乳糖的含量（P＜0.01）、提高了猪乳品质的结果。

The immediate effect of urea on the soil reaction is alkaline.

尿素对土壤反应的直接效果表现为碱性反应。

Analyzes the design defects of ammonia condenser in SNAM ammonia stripping process urea plant and provides the improvement methods.

剖析斯那姆氨汽提法尿素生产装置中氨冷凝器的设计缺陷，提出改进措施。

The results showed that the optimum condition for straw anaerobic fementation is the straws was 8cm length and pretreatment with 10% ammonia liquor, inoculation proportion 1:1.5, control the humidity of sludge 91.7%, and the culture temperature 35℃, with supplement of 0.5% urea.

结果表明农作物秸秆厌氧消化产甲烷的适宜条件是：用质量分数10%的氨水预处理，秸秆长度8cm，接种量1：1.5，接种污泥含水率91.7%，反应温度35℃，尿素添加量为秸秆用量的0.5%。

Three initiators, ammonium persulfate / DMA, ammonium persulfate / urea / ammonia liquor, ammonium persulfate / triethanol amine were applied to the polymerization at 50癈, 55 癈 and 60癈, and the influence of ratio oxidant / reductant on reaction rate and molecular weight of polymer were studied.

本文研究了过硫酸铵／DMA、过硫酸铵／氨水／尿素、过硫酸铵／三乙醇胺三种引发体系在50、55、60℃下，不同氧化剂、还原剂配比条件对反应速率、分子量的影响。

The grafting copolymerization of 2-Acrylamido-2-methyl propane sulfonic acid onto soybean protein isolate was carried out in 8 mol/L urea aqueous solution with ammonium persulphate as initiator and β-mercaptoethanol as protein unfolding agent.

以亲水2-丙烯酰胺基-2-甲基丙磺酸为接枝单体、过硫酸铵为引发剂、β-巯基乙醇为大豆分离蛋白的变性剂，在8mol/L的尿素溶液中对SPI进行接枝共聚改性。

Calculate the percentage by mass of nitrogen in urea and ammonium sulphate.

试计算氮在尿素及硫酸氨的质量百分率。为何农夫对这些数字有兴趣？

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。