己二酮

The optimal separating condition of chromatography analysis was: Shimadzu VP-ODS 150mm4.6mm as chromatographic column; acetonitrile/water (12/88,V/V, Contained 1.25mmol/l phosphoric acid) as mobile phase with flow rate of 1.0ml/min. Macroporous ion exchange resins and activated carbon were applied to enrich the trace level impurities and the main impurities was determined by LC-MS and GC-MS.They were : Benzonitrile , 2-Methyl-8-hydroxyquinoline, 2,6-Pyridinediamine , O-ethyloxime Cyclo-hexanone and compound with 220 molecular weight .

采用离子树脂和活性炭吸附富集这些微量的杂质，并通过液质联用和气质联用对杂质进行了定性分析，鉴定了影响290nm吸收的主要杂质为苯甲腈，2甲基-8羟基喹啉，2，6二氨基吡啶，O-乙基环己酮肟和分子量220的物质。

The results indicated that Fructose 1,6-bisphosphate aldolase,succinate dehydrogenase ,and hexokinase were very sensitive to temperatures .Citrate-synthase was similar to that of mesophiles in temperature properties .

结果表明Y18细胞中1，6-二磷酸果糖醛缩酶，琥珀酸脱氢酶和己糖激酶对温度很敏感，柠檬酸合成酶的温度效应类似于中温酶，α-酮戊二酸脱氢酶和异柠檬酸脱氢酶存在不同温度特性的同功酶。

The company's products include: silane coupling agent KH-550, KH-560, KH-570, KH-602 and other models, perchlorethylene resin, high-chlorinated polyethylene resins, pigments, PCE, ethyl cellulose, poly vinyl perfluoro-C (F46 fluorine resin) silicone oil, dichloromethane, dichloroethane, cyclohexanone, protopine, ion exchange resin, epoxy resin, PF and other chemical raw materials, are manufacture of fine chemicals, adhesives, paint remover, paint, paint, antifreeze and other products of the basic raw materials.

本公司经营的产品有：硅烷偶联剂KH-550，KH-560，KH-570，KH-602等型号，过氯乙烯树脂、高氯化聚乙烯树脂、颜料、四氯乙烯、乙基纤维素，聚全氟丙乙烯树脂（F46氟树脂）硅油、二氯甲烷、二氯乙烷、环己酮、片碱、离子交换树脂、环氧树脂、PF等各种化工原料，是制造精细化工，粘合剂，脱漆剂，涂料，油漆，防冻液等产品的基本原料。

Cyclohexanone ethylene ketal was synthesized using vitamin C as the catalyst by microwave irradiation solvent-free method.

以维生素C为催化剂，采用微波辐射无溶剂催化合成环己酮乙二醇缩酮，探索了不同反应条件对产率的影响。

Hβ zeolite ; seven-member-ring ketal ; 1; 4-butanediol ; synthesis ; catalyst

Hβ；七元环缩酮； 1； 4-丁二醇；环己酮；合成；催化剂

Catalytic Synthesis of Cyclohexanone 1, 2-Propylene Ketal by Chitosan Supported with Iodine

篇名 壳聚糖负载单质碘催化合成环己酮1， 2-丙二醇缩酮

The details and results are summarized below:(1)An ABC style three component cascade reaction of aromatic aldehydes, aromatic amines and diethyl malonic ester or cyclohexanone has been developed.

论文从苯炔和亚胺出发，设计并系统研究了4种新的多组分串联反应，主要内容和结果如下：(1)发展了一种芳醛、芳胺和丙二酸二乙酯或环己酮的ABC型三组分串联反应。

The Beckmann rearrangement of cyclohexanone oxime, phosphorus pentoxide (P_2O_5) and dimethyl formamide raction system into caprolactam was studied.

研究了以环己酮肟、五氧化二磷(P_2O_5)、二甲基甲酰胺组成的反应体系进行Beckmann重排制备己内酰胺工艺，考察了不同溶剂、催化剂用量、温度、浓度及水分含量对重排反应的影响。

In the paper, new type of polyurethane ionomers containing carboxyl in soft segments was synthesized with IPDI, DMBA, carboxylated polycaprolactone etc.

本文利用一种新型的聚己内酯、异佛尔酮二异氰酸酯、二羟甲基丁酸等合成了软段含有羧基的聚氨酯离聚体。

Ethane＞ toluene＞1, 3, 5-trimethylbenzene＞methyl isobutyl ketone＞1, 4-Dioxane＞isoprene＞ 1, 2, 4-trimethylbenzene＞cyclohexane＞1, 3-Butadiene＞methyl butyl ketone were the most reactive VOC species in PRD.

化学活性排名前十位的化合物为：乙烯＞甲苯＞1，3，5-三甲苯＞甲基异丁基酮＞1，4-环氧乙烷＞异戊二烯＞1，2，4-三甲苯＞环己烷＞1，3-丁二烯＞甲基丁基酮。

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。