丙酮

The key applications,various methods of preparing hexafluoroacetone ,which is an important intermediate for synthesizing organic fluoric materials,were reviewed.

对合成有机氟材料的重要中间体———六氟丙酮的制备研究进展情况及其应用进行了综述。

In the aspect of the photocatalytic activity, we did some experiments and tests: TiO_2 hydrosol degradated methyl orange, TiO_2 powder degradated acetone, TiO_2 films degradated formol and TiO_2 films degradated methyl orange, confirming that the as-prepared sample possessed preferable photocatalytic activity.

在光催化活性方面，测试了TiO_2水溶胶降解甲基橙、TiO_2粉末降解丙酮、TiO_2薄膜降解甲醛和TiO_2薄膜降解甲基橙的实验，证实了所制备的试样具有较好的光催化活性。

Secondly,a mixture of acetone and methyl formate was added into the methanol solution of sodium methoxide to prepare sodium formyl acetone by Claisen reaction.

以金属钠为原料，甲醇为溶剂，先制成甲醇钠的饱和甲醇溶液，再滴加丙酮和甲酸甲酯进行Claisen酯缩合制得丁酮烯醇钠，最后在强酸作用下与甲醇进行缩醛化反应合成了4，4-二甲氧基-2-丁酮，过程总收率达到73.1%，纯度98.7%。

Objective: To establish a method for detection of mesityl oxide in the air of workplace by GC chromatography.

目的：建立工作场所空气中异亚丙基丙酮的采样和测定方法。

Glyceraldehyde 3-phosphoate is converted to 1,3-bisphosphoglycerate(by glyceralbehyde 3-phosphatedehydrogenase) which reacs with ADP to give 3-phosphoglycerate and ATP (catelyzed by phosphoglycerate kinase).

果糖1，6二磷酸裂解为甘油醛3－磷酸和二羟丙酮磷酸；则两个丙糖被丙糖磷酸化异构酶相互转化。

Improve the activity of PK and lower the activity of fructose-1, 6-bisphosphatase from liver, enhance glycolysis and decline glyconeogenesis, promote glycogenesis.

提高组织中丙酮酸激酶活性及降低1，6-二磷酸酶活性，加强细胞内糖酵解和减少糖异生，促进糖原的生成。

SODIUM GLYCOLATE— Transfer about 500 mg of it, accurately weighed, into a 100-mL beaker, moisten thoroughly with 5 mL of glacial acetic acid, followed by 5 mL of water, and stir with a glass rod to ensure proper hydration (usually about 15 minutes). Slowly add 50 mL of acetone while stirring, then add 1 g of sodium chloride, and stir for several minutes to ensure complete precipitation of the carboxymethylcellulose.

乙醇酸钠—取本品500mg，精密称定，置于100mL烧杯中，用5mL冰乙酸完全润湿，接着加5mL水，并用玻棒搅拌使水合作用完全（搅拌时间一般为15分钟），边振摇边缓缓加入50mL丙酮，再加入1g氯化钠，振摇几分钟以确保羧甲基纤维素沉淀完全。

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

It is also an important intermediate of GLYCOLYSIS, being the immediate precursor of pyruvic acid.

它也是糖酵解过程中重要的中间物，是丙酮酸的直接前体，在乙醛酸循环中由草酰乙酸产生而合成葡萄糖。

Phosphoenolpyruvate is one of the two phosphoryl group donor s in the synthesis of ATP during glycolysis.

磷酸烯醇式丙酮酸是糖酵解中合成ATP的两种磷酸基的供体之一。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。