脲

The biological tests indicate that most of the compounds synthesized have herbicidal activity in a certain degree and several compounds show certain bactericidal activity. Further anti-ALS enzyme test shows that two kinds of novel phosphonic ureas have good anti-ALS enzyme activity.

对合成的部分化合物进行了初步的生物活性测定，所设计的大部分化合物都显示出一定的除草活性，有的具有一定的杀菌活性；对两类膦酰脲化合物进行了离体ALS酶抑制试验，结果表明它们是很好的ALS酶抑制剂，同磺酰脲相当，有希望作为另一类ALS酶抑制剂的先导化合物。

On the basis of these principles and requirements,in this paper,a new modifier has been synthesized from pyromellitic dianhydride and thiosemicarbazide by the nucleophilic addition of anhydride,the cyclization of acyl thiosemicarbazide in alkaline solution,and the N-hydroxymethylation of the triazole-thione.

本文根据这一思路，以均苯四甲酸二酐和氨基硫脲为起始原料，通过酸酐的亲核加成反应、酰氨基硫脲的碱性环化反应、三唑硫酮环的N-羟甲基化反应合成出了一种新的N-羟甲基三唑硫酮酸改性剂。

Take the melting point of the dry solid semicarbazone derivative and record the yield. If it is necessary to recrystallize the semicarbazone derivative, you may do so from an ethanol/water mixture.

测定干燥的缩胺基脲衍生物的熔点，并记录其产量，如果有需要将缩胺基脲衍生物进行再结晶的话，你可以用乙醇/水的混合物来进行。

Take the melting point of the dry solid semicarbazone derivative and record the yield. If it is necessary to recrystallize the semicarbazone derivative, you may do so from an ethanol/water mixture.

测定乾燥的缩胺基脲衍生物的熔点，并记录其产量，如果有需要将缩胺基脲衍生物进行再结晶的话，你可以用乙醇/水的混合物来进行。

In order to seek for the cotton glyphosate phytotoxicity safener, matches 7 effective content processing respectively with 0.1% forchilorfenur SL and 0.004% brassins AS, the bud stage time spraying, and uses effective content 2.73 g/L glyphosate 41% SL to spraying cotton, take single application glyphosate and the blank as the comparison. The results show that the forchlorfenur and the brassins are not fast to the disintoxicating effect, but have bears the poisonous effect.

为寻找棉花田草甘膦药害安全剂，用0.1%氯吡脲SL和0.004%芸苔素内酯AS各配成7个处理，蕾期按小区喷施，再用2730mg/L的41%草甘膦异丙胺盐SL喷施棉花，以单施草甘膦和空白为对照，结果氯吡脲和芸苔素内酯对草甘膦药害无快速明显解毒效果，但有耐毒功效。

The method comprises: reacting semicarbazide and terephthalaldhydic acid under stirring, and monitoring the end point with silica gel thin layer chromatography to obtain terephthalaldhydic acid semicarbazone.

本发明以氨基脲为原料，在搅拌下与对醛基苯甲酸反应，用硅胶薄层层析法监测反应终点，合成氨基脲缩对醛基苯甲酸。

A method for determination of the four metabolites of nitrofuran antibiotics such as 3-amino-2-oxazolidinone, 3-amino-5-morpholinomethyl-2- oxazolidinone, semicarbazide and 1-aminohydantoin in Poultry Tis- sues by LC-MS-MS was developed.

本文建立了用高效液相色谱-串联质谱测定禽肉组织中3-氨基-2-唑烷基酮、5-甲基吗啉-3-氨基-2-唑烷基酮、氨基脲和1-氨基-2-内酰脲4种硝基呋喃类抗生素代谢物的方法。

On the basis of previous work in our laboratory, several novel thiosemicarbazones and semicarbazone compounds containing pyrazolone-ring have been synthesized.

本文在实验室原有工作的基础上，合成了以吡唑啉酮环为变色主体的缩氨基脲、氨基硫脲类有机光致变色化合物，通过对固态光致变色性质和晶体结构的研究，深入分析了它们的变色机理，并总结了光致变色性质与之间结构的关系。

This invention discloses a method for synthesizing terephthalaldhydic acid semicarbazone.

一种氨基脲的衍生物氨基脲缩对醛基苯甲酸的合成方法，属于生物化工技术领域。

The reactions that isocyanate reacted to cellulose, semicellulose, lignin, and water in timber to form the urethane and urea are basic knowledge for the adhesion of isocyanate-terminated polyurethane resins to wood. It has significant meaning to understand that different quantity of urethane and urea affect the strength of adhesive bond.

异氰酸酯基与木材中的纤维素、木素、半纤维素和水在一定条件下生成氨基甲酸酯和取代脲的反应是聚氨酯胶粘剂与木材胶接的基础反应，研究氨基甲酸酯和取代脲的生成量对胶接强度的影响具有积极的理论意义和实践指导价值。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷