丙酮的

If we used potentiostatic electrosynthesis method, a kind of black polymer film was found on cathodic surface when 〓 was more negative than-1. 40V . XPS analysis demonstrated that the film formed from excited pyruvic acid, tetrahedral intermediate and imino acid.

时，电极表面上吸附的丙酮酸，四面体中间体和亚胺酸受激而生成黑色的聚合膜，通过XPS技术对聚合物进行了定性、定量和结构分析。

Use steel emery to treat steel cast iron and other irony metal; use quartz sand to treat stainless steel, Alminium, Zinc or other ironless metals.

对于金属表面的防锈油、油质等，可使用溶剂（如丙酮、120#以上高标汽油或95%浓度的酒精）浸泡或冲洗进行脱脂。

Ab initio and density functional theory (B3LYP) in G98 were employed to study the following four direct aldol reactions between acetone and isobutyraldehyde or 3,3-dimethylbutyric aldehyde or benzaldehyde or 4-bromo-phenyl aldehyde catalyzed by-proline .

中文摘要：本文采用G98程序包中的从头计算方法和密度泛函方法计算研究了-脯氨酸催化丙酮与异丁醛、3，3-二甲基丁醛、苯甲醛及对溴苯甲醛的不对称直接羟醛缩合反应，共计四个反应体系。

The graft copolymerization of vinyl monomer onto carbon black with,respectively,ceric ions, n butylithium,acetylacetonate copper complex and manganic pyrophosphate complex as initiator were studied.

讨论了分别在铈离子体系，正丁基锂体系，过渡金属离子乙酰丙酮铜以及焦磷酸络锰体系的作用下，炭黑与乙烯基单体的接枝聚合。

The unit can be used to sample most containerized liquid wastes, except those containing ketones, nitrobenzene, dimethylformamide, mesityl oxide, and tetrahydrofuran.

该装置可用于大部分的废品样本采集除含有酮，硝基苯，二甲基甲酰胺，异丙叉丙酮和四氢呋喃的液体废品。

The results indicated isoprene was soon consumed under the condition of excess ozone. During the reaction, the major carbonyl products formed were methyl vinyl ketone, methacrolein, methylglyoxal, and formaldehyde. Formic acid, CO and CO2 were also among the products.

在反应温度(294±2)K，压力为1.01×10^5Pa空气，O3过量的条件下，异戊二烯很快反应完全，反应中生成的羰基产物主要包括甲基丙烯醛、甲基乙烯基酮、丙酮醛和甲醛；产物中还包括甲酸、一氧化碳和二氧化碳。

Octylene was synthesized via tetramerization of ethylene at the presence of a catalyst system consisted of chromium acaet as primary catalyst, methylaluminoxane as cocatalyst, bis amine as ligand under high pressure. The effects of different PNP ligands on catalyst activity and selectivity to 1-octene were investigated.

在乙酰丙酮铬、甲基铝氧烷、配体三元催化体系中，以乙烯为原料在高压下齐聚生成1-辛烯，主要考察N原子上取代基不同的PNP配体对催化剂活性及1-辛烯选择性的影响。

Above all, the optimum synthetic condition of the photoactive compound is that acetone/water (85:15, volume ratio) is applied as the solvent and Et3 N is applied as the catalyst.

得到合成感光剂的最优条件：丙酮和水作溶剂的体积比为85：15，三乙胺作催化剂。

The piperonyl acetone is a perfume and an intermediate of some medicines.

胡椒基丙酮是一种名贵的单体香料和一些药物的合成中间体。

To explore the relationship between the change of M2-PK level in plasm with the occurrence of gastric cancer and the diagnostic value for gastric cancer.

目的 探讨血浆M2-丙酮酸激酶(M2-PK)含量变化与胃癌发生的关系及M2-PK对胃癌的诊断价值。

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。