查询词典 acetoacetate

_6P_2W_(17)VO_(62) catalyst was prepared and characterized by FTIR,and synthesis of fraistone over as-synthesized catalyst from ethyl acetoacetate and 1,2-propylene glycol was investigated.

制备了Dawson型磷钨钒酸铵催化剂，用FT-IR分析方法对催化剂进行了结构表征，并以乙酰乙酸乙酯与1，2-丙二醇为原料催化合成了苹果酯-B。

Various affecting factors were investigated. When the amount of catalyst was about 0.5%（m-dihydroxybenzene,n／n）,the mole ratio of ethyl acetoacetate to m-dihydroxybenzene was 1.3∶1,the yield reached to 85.0% under 110℃ in 21 min.

考察了原料配比、催化剂用量和反应温度对产品收率的影响，得到较适宜的合成条件为：在110℃下，催化剂用量为0.5％，n∶n=1.3∶1时，反应21 min，平行实验的平均收率为85.0%。

Diagnostic tests include the arterial blood gas, and nitroprusside test for acetoacetate (used qualitatively, not quantitatively, because it always underestimate s the severity of the acidsis).

诊断实验包括动脉血气分析、以及测定乙酰乙酸的硝基实验（因常用于估计酸中毒的严重程度，只作为定性实验而不是定量的）。

When MAA yeast was used to catalyze other systems, such as reducing ethyl 4-chloroacetoacetate to ethyl-4-chloro-3-hydroxybutyrate and ethyl acetoacetate to ethyl-3-hydroxybutyrate, the yield also improved at various degrees.

用此酵母在水相中催化乙酰乙酸甲酯的还原，其得率较普通面包酵母要高。pH和温度对MAA酵母与普通面包酵母都有相同的影响。

Diagnostic tests include the arterial blood gas, and nitroprusside test for acetoacetate (used qualitatively, not quantitatively, because it always underestimates the severity of the acidsis).

诊断实验包括动脉血气分析、以及测定乙酰乙酸的硝基实验（因常用于估计酸中毒的严重程度，只作为定性实验而不是定量的）。

The synthesis of celery ketone from butyl aldehyde and ethyl acetoacetate was improved with higher yield by using solid superbase(K2O/γ-Al2O3) for the first time.

在正丁醛和乙酰乙酸乙酯为原料合成芹菜酮的合成过程中，对其催化方法进行改进。

The influence of reed produced allelopathy material eathyl-2-methyl acetoacetate on respiration action, photosynthesis action and antioxidant enzymes system of Microcystis aeroginosa were studied.

研究了芦苇产生的化感物质2-甲基乙酰乙酸乙酯对铜绿微囊藻呼吸作用、光合作用和抗氧化酶体系的影响。

Diagnostic test s include the arterial blood gas, and nitroprusside test for acetoacetate (used qualitatively, not quantitatively, because it always underestimates the severity of the acidsis).

诊断实验包括动脉血气分析、以及测定乙酰乙酸的硝基实验（因常用于估计酸中毒的严重程度，只作为定性实验而不是定量的）。

Supported 12-Phosphotungstic Acid and Its Salts as Catalysts for the Synthesis of Fructone and Fructone-B;2. Their catalytic activities were measured by synthesis of fructone-B from ethyl acetoacetate and 1,2-propanediol.

制备了一系列以脱铝超稳Y沸石为载体的磷钨酸及其铯盐催化剂，考察了催化剂在以乙酰乙酸乙酯和1，2-丙二醇为原料催化合成草莓酯反应过程中的性能。

N,N-Dihydroxyethyl-acetoacetamide,the raw material of the borate ester bonding agent,was synthesized from methyl acetoacetate and diethanolamine .

二乙醇胺与乙酰乙酸甲酯反应合成了硼酸酯键合剂原料N，N-二羟乙基乙酰乙酰胺。

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。