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Among 3 cultivars, B17 occupied the least green odor contents of aromatic constituents, such as 2-hexen-1-ol acetate, butanoic acid 3-hexenyl ester and butanoic acid 3-hexenyl ester, hut had the most fruity, flowery and woody odors such as β-Ionone, 1-nonanol, Acetic acid octyl ester, Methyl benzoate, Ethyl benzoate and theaspirane, which showed that B 17 was superior to the 2 other cultivars in aroma quality.

不同品种的杨桃果实中的所含的香气成分及含量不同,B17杨桃含乙酸-反-2-烯酯、丁酸-反-2-烯酯、丁酸-反-3-烯酯等青香型酯类最低而含β-紫罗兰酮、1-壬醇、乙酸辛酯苯甲酸甲酯、苯甲酸乙酯、茶螺烷等花香型、果香型及木香型成分最高,因而其香气品质要优于B10和新加坡红肉种。

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,乙酸酯,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,酸乙酯等相对含量较高。

The separation and determination of caproic acid,1-octanol and octyl caproate by high performance liquid chromatography on the Kromasil C18(150 mm×4.60 mm,5 μm) column with V∶V=95∶5 as mobile phase and with refractive index detector were also studied.

按常规有机合成方法合成了酸正辛酯,采用在Kromasil C18(150 mm×4.60 mm,5 μm)柱上,以V∶V=95∶5为流动相及示差折光检测器的反相高效液相色谱法,30 ℃分离和测定了酸、1-辛醇及酸正辛酯。

The invention relates to a continuous process for recovering caprolactam from aqueous caprolactam product, said aqueous caprolactam product comprising caprolactam, impurities, and water, said process comprising: adding alkali hydroxide to the aqueous caprolactam product, in an amount of not more than 100 mmol alkali hydroxide per kg of caprolactam; reacting at least part of the added alkali hydroxide to form alkali amino caproate, to obtain a caproate-enriched caprolactam product; and distilling the caproate-enriched caprolactam product at reduced pressure.

本发明涉及从含水内酰胺产物中回收内酰胺的连续方法,所述含水内酰胺产物包括内酰胺,杂质,和水,所述方法包括:以不超过100mmol碱金属氢氧化物/kg的内酰胺的量将碱金属氢氧化物加入到含水内酰胺产物中;让所添加的碱金属氢氧化物的至少一部分起反应,形成碱金属氨基酸盐,以获得了富含酸盐的内酰胺产物;和减压蒸馏富含酸盐的内酰胺产物。

Reductive conversion of geraniol to citronellol is adopted as a model reaction, and several factors in the reaction are discussed using gas chromatography method. The influence of n-hexane and butyl acetate, as organic solvents, on biocompatibility was studied; the influence of methanol, ethanol, glycol, n-butanol and 1-hexanol, as energy substance, on the transformation efficiency was compared, respectively; the catalysis capabilities of Baker's yeast, XST-KO yeast, LP yeast, alcohol yeast, dry yeast, Saccharomyces cerevisiae, Angel yeast and Meishan yeast were discussed. It has been proved that biocompatibility of n-hexane are much better than that of butyl acetate, and the hexane has been demonstrated the most effective in terms of the influence on biotransformation, Baker's yeast has shown the highest tranformation efficiency among the eight yeast strains.

以香叶醇转化为香茅醇作为模型反应,通过气相色谱法进行定性和定量分析研究了影响该有机相生物转化反应的几个基本因素,考察了两种有机溶剂正烷和乙酸丁酯对生物相容性的影响,选用甲醇、乙醇、乙二醇、正丁醇和l-醇分别作为能量物质进行实验,比较其对转化的影响并探讨了Baker's酵母、XST-KO酵母、LP酵母、酒精酵母、假丝酵母、干酵母、安琪酵母和梅山酵母八种不同酵母作为生物催化剂对模型反应的催化能力,结果表明,正烷作为有机溶剂,其生物相容性明显好于乙酸丁酯,更加有利于该生物转化反应进行;乙二醇作为能量物质,该模型反应转化率最高;而 Baker's酵母作为生物催化剂,对该模型反应的催化能力最强,最适合作为该模型反应的催化剂。

This algorithm is proposed on the basis of the thought as follovvs: as for three dimensional Euclid space, the feasible region of any linear programming problem is a extended convex polyhedron, of which surface is consisted of some planes, and its objective function can be regarded as a parallel plane pencil with objective function value acting as parameter.

如果线性规划问题有最优解,那么过可行域的一已知顶点必至少存在这样一条棱——它以该知顶点为一端点,可行域的另一顶点为另一端点,并使目标函数在另一端点的函数值优于知端点的函数值,否则,该知点就是线性规划问题的最优解。

In the condition of 1 MPa O_2 and 413 K for 4 h, the conversion of cyclohexane is 16.9%, and the total selectivity of cyclohexanol and cyclohexanone is 93%.

在该反应条件下,环烷的转化率为16.9%,环酮和环醇的总选择性为93%。

The major products were cyclohexanecarboxylic acid and cyclohexanol. The possible reaction pathway was similar to that of benzene.

这一体系也可用于环烷的羰基化反应,产物为环甲酸和环醇,反应历程与苯羰基化基本相同。

The commercial process of cyclohexane oxidation to cyclohexanone and cyclohexanol shows low conversion, poor selectivity, high-energy consumption and environmental pollution. It is of great academic and practical importance to study and develop highly efficient and environmentally friendly catalytic cyclohexane oxidation processes.

现有的环烷氧化制环酮生产工艺,存在转化率低、选择性差、能耗高以及污染环境的缺点,研究和开发高效、环境友好的环烷催化氧化工艺具有重要的理论意义和实用价值。

The catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol in air as probe reaction was performed without any organic solvent or cocatalyst, and the influences of the amount of metal porphyrin, reaction pressure, reaction temperature and reaction time on the catalytic activity were investigated.

以空气氧化环烷制备环酮和环醇为探针反应,在不加入任何有机溶剂或助催化剂的条件下考察了金属卟啉用量、反应压力、温度、时间等对其催化活性的影响。

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My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

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