urea

This proved that nitrourea was a more suitable reactant than urea to synthesize Keto-RDX.

由此表明了在生成RDX酮的反应过程中，硝基脲上比脲为合适的反应形式。

The soy sauce containing urea will become red when heated together with diacetyldioxime and phosphoric acid.

掺有尿素的酱油在与丁二酮肟、磷酸混合后,加热煮沸会呈现红色。

Since various, cause has not given a test to maneb zinc supersession thing second braces sulfurs urea (ETU).

由于各种原因未对代的代谢物乙撑硫脲（ETU）进行检测。

Cross-linking agent glycoluril with a yield of 61.8% had been synthesized by employing urea and glyexal as reactants,and hydrochloric acid as catalysts.

以尿素和乙二为原料,在酸催化的条件下合成了甘脲,产率为61.8%。

Bromacil was synthesized using 2-bromobutane and urea as the starting materials in three steps including condensation,cyclization and bromination with total yield of 61%.

以2-溴丁烷和尿素作为起始原料,经缩合、环化、溴代三步反应得到除草定,总收率为61%。

High-grade filling and retanning agent CDF was prepared by condensation polymerization reaction of urea,cyanuramide and dicyandimide.The property and application of the product were discussed.

本文主要论述了用脲、双氰胺、三聚氰胺等原料经缩聚反应制备填充复鞣剂CDF的方法及其性能与应用。

This paper presents the studies on the reaction form of urea or nitrourea which condenses with nitrolysis fragments of urotropine to form Keto-RDX in nitrating agents.

通过改变加料方式来研究脲或硝基脲在硝化剂中与乌洛托品硝解碎片进行缩合反应的形式。

Methods Compounded one kind of trisaccharide iron urea indol culture medium and the trisaccharide iron agar has carried on the contrast experiment with the national standard method in voluntarily.

方法自行配制了一种三糖铁尿素靛基质培养基,并与国家标准方法中三糖铁琼进行了对比试验。

A kind of monosubstituted squaric amide ——mono carbamoyl amide of squaric acid 3(MCASAQ) was prepared by the condensation of squaric acid (SQ) with urea or its derivatives in water.

以水为介质,方酸与脲及其衍生物顺利发生脱水缩合,合成了一类方酸单酰胺化合物——氨甲酰类氮氧方酸3。

The biruet can develop the color with the cupric sulfate in the alkaline solution, we call that the biruet reaction.Malonyl urea has acidity, so we call it barbituric acid.

巴比妥酸本身无镇静催眠作用，当它的五位亚甲基上的两个氢被烃基取代后才呈现镇静催眠的生理活性，是一类对中枢神经系统起抑制作用的化合物。