查询词典 urea-formaldehyde

Only in April and May was urea as good as ammonium nitrate.

只有在4~5月份，施尿素才和施用硝铵的效果一样。

At lower rates of nitrogen （50 and 100 kg ha-1）, urea was only about 65% as effective as ammonium nitrate.

在低氮量（50和100公斤N/公顷）情况下，尿素的施用效果只有硝铵的65%。

This highlights the excessive nature of the common practice of split applying high rates of ammonium nitrate or urea.

作者指出，适于引起淋失的环境条件加上高降雨量，可能使施用控释氮肥的好处更加明显。

In order to decrease the production cost of Microbial Flocculant M-25, the amylum and urea were developped for the cheap substitutes of carbon source and nitrogen source of Charls medium.

为了降低微生物絮凝剂M-25的生产成本，以查氏母液为基础，采用替代碳源和氮源的方法，开发出了廉价的替代碳氮源：淀粉和尿素。

All patients were treated for 20 days.Before treatment and after treatment, 24 hour urine proteinuria,urine micro-albumin , urine IgG,urine α1-microglobulin,urine red blood cell number ,blood urea nitrogen,serum creatinine,endogenous creatinine clearance rate plasma rennin and angiotoninⅡconcentration were meatrued.

观察治疗前后血浆肾素、血管紧张素、24h尿蛋白定量、尿微量白蛋白、尿免疫球蛋白G、尿α1-微球蛋白(尿α1-M)、尿红细胞数、血尿素氮、血清肌酐及内生肌酐清除率Ccr等指标的变化。

All patientswere treated for 20 days. Before treatment and after treatment, 24 hour urineproteinuria, urine micro-albumin, urine IgG, urineα_1-microglobulin, urine redblood cell number ,blood urea nitrogen,serum creatinine,endogenouscreatinine clearance rate plasma rennin and angiotoninⅡconcentration weremeatrued.

观察治疗前后血浆肾素、血管紧张素、24h尿蛋白定量、尿微量白蛋白、尿免疫球蛋白G、尿α_1-微球蛋白(尿α_1-M)、尿红细胞数、血尿素氮、血清肌酐及内生肌酐清除率Ccr等指标的变化。

The yield of the 3, 4-dihydropyrimidine-2(1H)-one was up to 95.4% under mole ratio of anisaldehyde, methyl acetoactate and urea is 1:2:5, ion-exchange membrane is 3 g, ethyl alcohol as solvent and refluxing for 2 h.

当对羟基苯甲醛、乙酰乙酸甲酯与脲的摩尔比为1：2：5，乙醇作溶剂，3 g离子交换膜，回流2 h，产物收率达95.4%。

Methoxycarbonyl-4-(4-methoxyphenyl )-6-methyl-3, 4-dihydropyrimidine-2(1H)-one was synthesized from anisaldehyde, methyl acetoactate and urea in presence of HF-1O1 strong acidic ion-exchange membrane.

在HF-101强酸性离子交换膜的存在下，由对羟基苯甲醛、乙酰乙酸甲酯与脲一步合成了5－甲氧羰基－4－（4－甲氧苯基）－6－甲基－3，4－二氢嘧啶－2(1H)－酮。

Methods On the conditions of strong acid and calefaction,urea can react on antipyrine and diacetyl monoxime and become yellow which can be determined by colorimetric analysis in 450 nm with the ALLIANCE FUTURA continuous flow injection auto analysis system.

方法根据尿素在强酸和加热条件下与安替比林及二乙酰一肟反应呈黄色，在450nm比色定量的原理，选用FUTURA流动注射分析仪对游泳池水中的尿素进行测定，进行余氯干扰试验，并将该方法与二乙酰一肟安替比林法进行比较。

Laboratory studies in patients with prerenal azotemia demonstrate elevated serum creatinine and blood urea nitrogen levels.

肾前性氮质血症患者的实验室检查可见血清肌酐和尿素氮水平升高。

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。