查询词典 acetic aldehyde

Several routes for synthesizing methyl isopropyl ketone were introduced, including the main methods based on isobutyl aldehyde-acetic acid, isobutyric acid -acetic acid, methyl ethyl ketone-formaldehyde and isoprene.

介绍了甲基异丙酮的多种合成路线，主要有异丁醛-乙酸法、异丁酸-乙酸法、甲基乙基酮-甲醛法和异戊二烯法。

By using gas chromatography technique nine kinds of fragrance components(acetic aldehyde,ethyl acetate,ethanol,propyl acetate,3-hydroxy-2-butanone,acetic acid,furfural,metacetonic acid,2,3-butylene glycol)were measured quantitatively in different kinds of Shanxi overmature vinegar and the other kinds of vinegar.

应用气相色谱方法对山西老陈醋和其他种类醋的9种香气成分(乙醛、乙酸乙酯、乙醇、乙酸丙酯、3-羟基-2-丁酮、乙酸、糖醛、丙酸、2，3-丁二醇)进行了定性、定量测定，并用聚类分析、模糊综合评判、方差分析、回归分析的方法对实验结果进行了数理分析。

Five chalcones were synthesized via the aldol condensation reaction of acetophenone or parasubstituted acetophenones with 1-phenyl-3-methyl-5-phenoxyl-pyrazol-4-aldehyde, which reacted with two kinds of hydrazine in glacial acetic acid under refluxing to give a series of bipyrazoline derivatives. In this synthetic course, glacial acetic acid is not only a solvent, but also a catalyzer.

以1-苯基－3-甲基－5-苯氧基－吡唑-4-甲醛为原料，与苯乙酮发生羟醛缩合，生成相应的查尔酮，再在冰醋酸中与不同的肼反应，高产率的合成出10种新的5位含1-苯基－3-甲基－5-苯氧基－吡唑基的吡唑啉类衍生物。

The components of higher relative content in wines were ethyl acetate, butanoic acid methylester, acetic acid isobutylester, butyric acid ethylester, isobutylalcohol, isopentylacohol acetate, isopentylalcohol, acetic acid hexylester, hexylalcohol, ethyl caprylate, decanoic acid ethylester, acetic acid phenethylester, lauric acid ethylester, benzeneethanol, octanoic acid,decanoic acid and hexanoic acid ethyl ester.

猕猴桃酒样中乙酸乙酯，丁酸甲酯，丁酸异丁酯，丁酸乙酯，异丁醇，乙酸异戊酯，异戊醇，乙酸己酯，己醇，辛酸乙酯，癸酸乙酯，乙酸苯乙酯，月桂酸乙酯，苯乙醇，辛酸，癸酸，己酸乙酯等相对含量较高。

The logarithmic growth phase of growth curve of acetic acid bacteria was later than that of yeast and acetic acid bacteria. Acetic acid bacteria and yeast isolated from the Kombucha were cultured, respectively.

发酵液中的乳酸菌数量比酵母菌和醋酸菌低，其对数生长期在培养后的第6d～8d，比醋酸菌、酵母菌慢得多。

Kinetics of photo-chlorination of acetic acid to form monochloroacetic acid ;2. The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92。

Mirror infiltrating the cancer vagina the image is that the blood vessel is abnormal mainly,original place cancer vagina mirror visible image acetic acid white epithellum,major partners the shape blood vessei,heterotype blood vessel,mosaic and floccosoids wait a little bit;CIN acetic acid white maximum appears on epithelium,the shape blood vessel,heterotype blood vessel,rnosaic and floccosoids take second place;The chronic cervicitis gives first place to no representative shape blood vessel China and acetic acid white epithelium.

浸润癌阴道镜图像主要是血管异常，原位癌阴道镜图像可见醋酸白色上皮，多数伴有点状血管、异型血管、镶嵌和白斑等；CIN醋酸白色上皮出现最多，点状血管、异型血管、镶嵌和白斑次之；慢性宫颈炎以不典型点状血管和醋酸白色上皮为主。

Mirror infiltrating the cancer vagina the image is that the blood vessel is abnormal mainly,original place cancer vagina mirror visible image acetic acid white epithellum,major partners the shape blood vessei,heterotype blood vessel,mosaic and floccosoids wait a little bit;CIN acetic acid white maximum appears on epithelium,the shape blood vessel,heterotype blood vessel,rnosaic and floccosoids take second place;The chronic cervicitis gives first place to no representative shape blood vessel China and acetic acid white epithelium.

浸润癌阴道镜图像主要是血管异常，原位癌阴道镜图像可见醋酸白色上皮，伴有点状血管、异型血管、镶嵌和白斑等；CIN醋酸白色上皮出现最多，点状血管、异型血管、镶嵌和白斑次之；慢性宫颈炎以不典型点状血管和醋酸白色上皮为主。

On the basis of summarizing separation method of acetic acid-water system, we studied the azeotropic distillation process of acetic acid-water system, selecting butyl acetate, isobutyl acetate and isopropyl acetate as entrainers. The influence of packing height, ratio of water to entrainer and acetic acid initial concentration to separation effect of azeotropic distillation was studied in detail. Simulation calculations of general distillation and azeotropic distillation were carried out. The influence of reflux ratio, theoretical plate, feed position, feed temperature and feed concentration to distillation process were discussed. Preferred process operation parameter, which had guiding meaning to practical production of distillation process were obtained. Basic data for the process amplifying design of azeotropic distillation tower were provided. Invest and operation energy consumption of two distillation methods were compared. The elementary technical design of azeotropic distillation tower was carried out on the basis of result of simulation calculation. The type of major auxiliary equipments and inner parts of packed tower were selected.The research results are as follows:(1) Butyl acetate, isobutyl acetate and isopropyl acetate could be selected as entrainer, and separation effect was near.

本文在综述醋酸-水体系分离方法的基础上，以醋酸丁酯、醋酸异丁酯、醋酸异丙酯为挟带剂，对醋酸水溶液进行共沸精馏过程研究，详细研究了填料高度、水与挟带剂的配比、醋酸初始浓度等对共沸精馏分离效果的影响；对醋酸-水体系进行普通精馏和共沸精馏过程模拟计算，讨论了回流比、理论板、进料位置、进料温度和浓度对精馏过程的影响，获得了对醋酸-水体系精馏过程实际生产具有指导意义的较佳的工艺操作参数、共沸精馏塔的工艺设计放大的基础数据，并对两种精馏方法的投资、操作能耗进行了比较；同时在共沸精馏模拟计算的基础上进行了共沸精馏塔的初步工艺设计计算，并对填料塔的主要辅助设备及塔内件进行了初步选型。

Acetic acid which is corrosive organic acids in one of the strongest material ordinary steel in all of the acetic acid concentration and temperature will be of serious corrosion stainless steel is an excellent acid-resistant materials 316 stainless steel containing molybdenum can also apply dilute acetic acid in the heat and steam.

醋酸 它是有机酸中腐蚀性最强的物质之一，普通钢铁在一切浓度和温度的醋酸中都会严重腐蚀，不锈钢是优良的耐醋酸材料，含钼的316不锈钢还能适用于高温和稀醋酸蒸汽。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。