氨基甲酸酯

The reaction mixture was cooled to 10 °C and excess liquid ammonia added to form the acyclic carbamate 13 in 95% yield.

在反应混合物冷却到10 ° C和过剩的液氨补充，形成环氨基甲酸酯类13 95 ％的产量。

To establish the method of gas chromatography mass spectrometry and selected ion monitoring for the determination of organophosphorus, pyrethroid, organochlorine, carbamate and weedicide pesticide residues in foods.

目的 建立一种测定食品中有机磷、拟除虫菊酯、有机氯、氨基甲酸酯类和除草剂农药残留的气相色谱质谱方法。

Methods The pesticides were extracted with acetone and dichloromethane, warmed with water at 40℃,and circumrotated and evaporated until it was nearly dry, then it was purified by Envi Carb column and Sep Pak NH2 column. Afterwards, gas chromatography mass spectrometry and selected ion monitoring were used to determine 42 pesticide residues, such as organo-phosphorus, pyrethroid, organochlorine, carbamate and weedicide.

该法采用丙酮、二氯甲烷提取，40℃水浴旋转蒸发近干，以Envi-Carb柱和Sep-Pak-NH2柱净化，以气相色谱－质谱选择离子监测方式分析检测有机磷、有机氯、拟除虫菊酯、氨基甲酸酯和除草剂等42种农药残留。

The isocyanate-terminated polyurethane prepolymer was also synthesized form polytetramethylene glycol and 4,4'-diphenylmethane diisocyanate in N,N-Dimethylformamide.

另外，将聚醚双醇与量之4，4'-二苯甲基二异氰酸酯行预聚合反应，形成具-NCO末端基之聚氨基甲酸酯预聚合体。

In this article, we have been investigated that synthesizing and properties of shape memory polyurethane. The shape memory polyurethane was synthesized from PCL diol, MDI(4, 4'-diphenylmethane diisocyanate) and BDO (1,4-butanediol) in this experiment. We analyzed that the effect of differential mole ratio of monomers to synthesized SMPU. Besides, the various concentrations of Nano-silver were mixed with SMPU. Mechanical properties and shape memory behavior of SMPU nanocomposite films were investigated.

本研究目的为藉由改变4，4'-二苯甲基二异氰酸盐(4，4'-diphenylmethane diisocyanate， MDI)/聚己内酯二元醇(polycaprolactone diol， PCL diol)/1，4-丁二醇(1，4-butanediol， BDO)等不同莫耳比制备形状记忆型聚氨基甲酸酯(Shape Memory Polyurethane， SMPU)；并探讨改变不同单体莫耳比及添加不同浓度奈米银溶液对其物性及形状记忆性的影响。

Methyl-l, 3-oxazine-2,4-dione are prepared from ethyl acetoacetate and ethyl carbamate at 140 for 6h, catalysted by zinc acetate, giving to 48.8% yields which is 33% more than the literature value.

选用醋酸锌作催化剂，使乙酰乙酸乙酯与氨基甲酸酯在140℃反应6h，合成6-甲基-1，3-噁嗪-2，4-二酮，产率达48.8％，较文献报道值高出了33％。

It is a simple, rapid, reliable method. It can be applied to pesticide active ingredients range of organic phosphorus, organic chlorine, permethrin, carbamates and organic nitrogen, and other non-heat-type decomposition of pesticides.

该方法具有简单、快速、可靠的特点，适用的商品农药有效成分范围包括有机磷、有机氯、菊酯、氨基甲酸酯和有机氮类等非受热易分解农药。

Among the non-phosgene synthesis of isocyanate presented, the most promising one is the thermal decomposition of N-substituted carbamates. Unfortunately, this kind of compound is also mainly produced from phosgene or phosgene derivatives in industry.

中文摘要在目前所报导的非光气合成异氰酸酯路线中，N-取代氨基甲酸酯热裂解法是最具有应用前景的一条途径，然而这类化合物的工业化生产也是以光气法为主。

Several carbonates are synthesized from carbamates either with hydrochloride as coreactant or with zeolites as catalysts under low temperature and pressure, whereas high yield is achieved through either the formation of ammonium chloride as precipitate or the adsorption of ammonia in zeolites.

在较低温度和压力下，以氯化氢为共反应物或沸石分子筛为催化剂，由氨基甲酸酯与醇反应合成多种碳酸酯。

The studies on metabolic enzymes、synergists and neurobioassays suggest that the monooxygenases、esterase and decreased nerve sensitity are involved in resistance to pyrethroids in the resistant HJ-R strain . The resistance to both organophosphorus and carbamate insecticides is mainly caused by metabolic mechanisms. The significantly synergistic effects of Pbo infer that the resistance to carbamata may be principally attributable to monooxygenases detoxification.

代谢酶系、增效作用以及神经电生理研究表明，HJ-R种群对拟除虫菊酯类杀虫剂的抗性是由多功能氧化酶及酯酶代谢增强、神经敏感性降低几个因子综合作用的结果；对有机磷、氨基甲酸酯类杀虫剂的抗性主要是由代谢机制引起，与靶标部位敏感性降低机制抗性无关，Pbo对HJ-R种群突出的增效作用，表明多功能氧化酶代谢在对灭多威的抗性中可能起主导作用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。