脲基

Hydrogen bonding in hard segment domains of segmented polyester polyurethaneurea based on 4,4'-diphenylmethane diisocyanate, ethylene diamine and polybutylene adipate(M. W. 1975 and M. W. 1228) was studied by means of IR spectroscopy.

用红外光谱法对基於4，4'-二苯基甲烷二异氰酸酯、乙二胺和聚己二酸丁二醇酯（分子量分别为1975和1228）的两系列嵌段聚酯型聚脲氨酯硬段微区中的氢键化进行了研究。

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。

Based on the possible degradation products, Microbial degradation pathways of metsulfuron-methyl is concluded as follows: after the cleavage of the sulfonylurea bridge, 2-amino-4-methoxy-6-methyl-triazine is demethylated and the annularity reaction of sulphanilamide occurs.

甲磺隆主要降解途径首先是脲桥的断裂，然后6-甲氧基-4-甲基-2-氨基-三氮嗪进一步脱甲基，而磺酰胺类物质将进一步脱氨基环化。

The results show that herbicidal activity is closely related to the steric and electronic properties of the 5-position of the benzene ring.

结果表明，此类磺酰脲类化合物的除草活性与苯环5位取代基的立体结构和电场性质密切相关。

The process, product features and biuret control in production of high analysis urea-based compound fertilizer are described, with the slow release ability of the product discussed.

摘 要］阐述高浓度尿基复合肥生产工艺、产品特点、生产过程中对缩二脲控制及其对产品缓释性能的研究。

Key words: high analysis urea-based compound fertilizer; process; parameter; biuret; slow release

关键词］高浓度尿基复合肥；生产工艺；参数；浓二脲；缓释性能

Through analysis on the technology characteristic and the main operating point in the different parts of process, such as granulation system temperature control, biuret concentration control, aminated triple superphosphate, dedusting and washing system, raw material distribution system and so on, the advantage of high-nitrogen compound fertilizer produced by K-T process is remarkable.

介绍尿基复合肥K-T技术工艺流程；通过造粒，系统温度控制，缩二脲含量控制，重钙的氨化，除尘洗涤系统，配料系统等方面的技术特点，操作控制要点的分析，指出K-T工艺生产高氮复合肥的突出优势。

You will convert the carvone to its semicarbazone for use in a polarimetric analysis.

为了作旋光度分析，你将会把香芹酮转变为缩胺基脲。

TDZ was used as cytokinin in tissue culture of taro in different genotypes.

在国内首次将苯基噻二唑基脲应用于不同基因型芋的组织培养中。

The effect of crosslinking agent dicumyl peroxide and co- crosslinking agent triallyl isocyanurate on the cure and tensile properties of liquid ethylene propylene diene monomer was investigated.

研究了由过氧化二异丙苯和助交联剂三烯丙基异氰脲酸酯组成的过氧化物体系对液体三元乙丙橡胶的交联及产物拉伸性能的影响。

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。