查询词典 acetacetic ester

The extraction effects of Zn and Cd from chloride medium with primary amine N1923 and 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester are studied.

考察了伯胺N1923与中性有机磷类萃取剂DEH／EHP的混合体系在盐酸介质中对Zn和Cd的萃取效应，研究了萃取机理，并研究了此混合体系对Zn和Cd的分离。

We investigated alcohol, acid, amine, ester and several kinds of normal metal clusters by using the HF-LCAO-MO method for the lubricate mechanism of different polarity bases, through the frontier orbital energy levels and its composition.

用HF-LCAO-MO方法计算醇、酸、胺、酯4类油性剂和常见金属的原子簇模型，从前线轨道能级、分子轨道组成等方面研究了不同极性基团的润滑机理。

The preparation and application of amino acid ester.

氨基酸酯的制备方法及应用。

On the basis of analyzing data about stearic acid triethanolamine ester quaternary's preparation process and methods of analysis and identification, this article summarized synthetic conditions for this quaternary ammonium salt, this synthetic condition composed by synthesis of esters and quaternary ammoniation.

在对有关硬脂酸三乙醇胺酯季铵盐的制备工艺、分析鉴定方法的资料分析的基础上，综述了由硬脂酸制备该季铵盐的工艺条件，该工艺条件由酯胺的合成和季铵化2步构成。

The polymethyl methacrylate material with super-hydrophobic surface of the invention is prepared in the following steps: 1 the polymethyl methacrylate material is first put into diamine solution, so that the ester group on the surface of the material has ammonolysis reaction with diamine molecules; 2 and then, the product of the step 1 is put into long chain fatty acid solution to be treated and the solvent is volatilized, so as to obtain the polymethyl methacrylate material with super-hydrophobic surface.

本发明具有超疏水表面的聚甲基丙烯酸甲酯材料，是按照如下步骤进行制备的：1将聚丙烯酸甲酯材料先置于二胺溶液中使聚丙烯酸甲酯材料表面的酯基与二胺分子发生氨解反应；2然后，将其置于长链脂肪酸溶液中进行处理，挥发掉溶剂，得到具有超疏水表面的聚甲基丙烯酸甲酯材料。

A liquid ester derived from amyl alcohol; has the odor of bananas.

一种液态酯，由戊醇衍生而来，带香蕉味。

The degradation process of potassium amyl xanthate and ester-105 as the common reagents used in mines under different conditions is investigated.

研究矿山常用药剂戊基黄原酸钾和酯-105在不同条件下的降解过程。

The toxicity effect of 6 carbamic ester pesticides on Anabaena flos aquae was studied .

6种氨基甲酸酯类农药对藻类的毒性效应。

High blood pressure, high blood ester, smoking, drinking, sugar diabetes, carotid sclerosis, fatness, atria quiver, blood vessel inflammation, blood vessel monstrosity, encephalic aneurism and high homocysteine are absolute danger factors, orderliness of living, morever incidence are masculine.

青年型脑血管病发生率的逐渐增高，其发病是一个极复杂的过程，其中高血压、高血脂、吸烟、酗酒、糖尿病、颈动脉硬化斑块、肥胖、房颤、血管炎、脑血管畸形、颅内动脉瘤、同型半胱氨酸增高，都是独立的危险因素，因此应积极早期预防，降低及避免青年型脑血管病的发生。

The second reaction we tested was diastereoselective Michael-Aldol annulation of -keto ester 121 with methacrolein to give a key intermediate for synthesizing (--Huperzine A.

通过对反应条件的筛选，我们得到的最好的结果是以-乳酸苄酯为手性辅基的β-酮酯121i为底物，以(1R， 2R)-环己二胺衍生的手性胍85i为催化剂，以无水四氢呋喃为溶剂，在-20℃反应，得到的产物的de值为73.2%。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"