查询词典 urea-formaldehyde

The synthesis of thiourea can be divided into two steps. First, cyanamide was produced by dehydration of urea. Second, cyanamide reacted with Na_2S in water solution, which produce thiourea and NaOH.

首先第一步通过尿素常压脱水制备氰胺，第二步氰胺与硫化钠溶液在一定温度下反应生成硫脲及氢氧化钠，而氢氧化钠与通入的硫化氢气体生成硫化钠，从而继续参与反应。

The influence of synthesis parameters on the purity of sodium cyanate was investigated,such as the mole ratio of urea to anhydrous sodium carbonate,reaction time and reaction temperature.

研究了尿素/无水碳酸钠物质的量比、反应时间和反应温度等反应条件对氰酸钠产品纯度的影响。

In this paper, melamine cyanurate was prepared by one-step reaction from urea, melamine, and sodium chloride and so on ordinary raw materials.

本文介绍了用尿素，三聚氰胺，氯化钠等普通原料经一步反应制备MCA的合成工艺。

Key words:Western Blotting;13C urea breath test;Helicobacter pylori;Cytotoxin associated gene protein;Children

关键词］免疫印迹试验；13C 尿素呼气试验；幽门螺旋杆菌；细胞毒性基因相关蛋白；儿童

Deamination is a much more complex process than just converting to urea.

事实上：脱氨作用是一个比只是简单地转变成尿素更加复杂很多的过程

These same researchers also found that a blood urea nitrogen level greater than 23 milligrams per deciliter lowers the sensitivity and specificity of the "delta-delta" calculation.

这些研究者们也同时发现血尿素氮水平超过8.28mmol/L的病人其"△-△"的敏感性和特异性较低。

These same researchers also found that a blood urea nitrogen level greater than 23 milligrams per deciliter lower s the sensitivity and specificity of the "delta-delta" calculation.

这些研究者们也同时发现血尿素氮水平超过8.28mmol/L的病人其"△-△"的敏感性和特异性较低。

In blood, luteotropin significantly increased at DCAB 400 fed sample, estradiol (E2) and urea decreased at DCAB 400 and 500 fed sample. However, Lactate dehydrogenate, creatine phosphokinase and total protein had a significant increase for DCAB 300 and 400 fed sample.

血液指标中，DCAB 400组提高了促乳素，DCAB 400和500组提高了雌二醇浓度和尿素；DCAB 300和400组乳酸脱氢酶、肌酸磷酸激酶和总蛋白显著提高；处理组钙含量显著高于对照组。

Urea is a common chemical denaturant of proteins.

尿素是常用的蛋白质变性剂，在胶粘剂研究中起着重要的作用。

Second, guanidine chloride is another important denaturant used commonly for protein unfolding. It is believed that guanidine chloride and urea have a similar mechanism of action.

其次，盐酸胍是常用于使蛋白质变性的另一种重要变性剂，盐酸胍分子与蛋白质分子相互作用的机理和尿素的情形具有相似性。

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。