查询词典 n-amyl acetate

Chiral N,P ligand 5 was examined for the asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl acetate with up to 89% yield and up to 81.6% ee.

化合物5用于钯催化的1，3-二苯基-2-烯丙基乙酸酯的不对称烯丙基烷基化反应，产率为89%，对映体过量最高为81.6% ee。

Based on the analysis of the chromatogram of flavoring compositions of Taishan Tequ, 13 kinds of flavoring compositions including n-propanol, isoamyl alcohol, ethyl caproate, ethyl lactate, ethyl acetate, ethyl butyrate, caproic acid, acetic acid, butyric acid, acetaldehyde, acetal, total acids and total esters were determined as the chromatogram skeleton compositions of Taishan Tequ. The physiochemical indexes of Taishan Tequ could be under proper control through the stipulation of the content range of the above flavoring compositions, which is an effective way to liquor quality improvement and stability and has greatly improved the blending techniques of Taishan Tequ.

以泰山特曲酒香气成分色谱分析结果为基础，确定了正丙醇、异戊醇、己酸乙酯、乳酸乙酯、乙酸乙酯、丁酸乙酯、己酸、乙酸、丁酸、乙醛、乙缩醛、总酸、总酯这13种香味成分作为泰山特曲的色谱骨架成分来控制成品酒理化指标，并制订了控制范围，使泰山特曲的勾兑技术有了飞跃的发展，成为提高与稳定产品质量的有效方法。

Also the molecular structure and functional effects of this active component were studied in detail. 1 Extraction, separation, purification and structural identification of the functional component in Chufa After initial handling of waste slurry to solid powder, ethanol was used to lixiviate it followed by the extraction with petroleum ether,ethyl acetate,n-butyl alcohol one by one, the polarity of three organic reagents being changed from low to high.

荸荠功能因子的提取、分离、纯化及结构鉴定以马蹄粉厂产粉废浆为原料，经过实验室初处理成固态原料粉后，用乙醇浸提，再将浸提物以水悬浮，依次通过极性从小到大的石油醚、乙酸乙酯、正丁醇三种有机溶剂两相萃取分部，并以金黄葡萄球菌、枯草芽孢杆菌和致病大肠杆菌为指示菌，检测上述各部分提取物的功能效果。

Object: The antimicrobial effects of the water, 60% alcohol, 90% alcohol extract and petroleum ether, ethyl acetate, n-butanol components from Pomegranate rind against 3 kind of pathogenesis bacterial and 14 kind of epiphyte were accomplished.

目的：对石榴皮的水、60%乙醇、90%乙醇提取物以及石油醚、乙酸乙酯、正丁醇萃取物对3种细菌和14种真菌的体外抗菌试验进行了研究。

Jiangmen City, Czech Run Chemical Trading Co., Ltd. operating chemical raw materials, mainly toluene, xylene, a rough, crude dimethyl, mixed aromatics, mesitylene, crude Sanjia, mixed dimethoxy, methylal, n-butyl, B ester, n-butyl alcohol, isobutyl alcohol, vinyl acetate, styrene, butyl ether, cyclohexanone, 6 #, 120 #, 200 #, titanium dioxide, phthalic anhydride, DOP, isopropanol for Main Product, Quality Assurance , the price advantage of abundant supply.

江门市捷润化工贸易有限公司经营化工原料，主要为甲苯、二甲苯、粗甲、粗二甲、混合芳烃、三甲苯、粗三甲、混二甲、甲缩醛、正丁酯、乙酯、正丁醇、异丁醇、醋酸乙烯、苯乙烯、丁醚、环己酮、6#、120#、200#、钛白粉、苯酐、DOP、异丙醇为主营产品，质量保证，价格优势，货源充足。

The inhibition effect of chloroform fraction was the most potent, with the inhibition rate about more than 83% to 5 plant pathogenic fungi under the concentration of 15mg/mL. Under the concentration of 15mg/mL, the ethyl acetate fraction and n-butanol fraction thoroughly inhibited the growth of Alternaria solani and Valsa mali, with the inhibition rate up to 100%. The n-butanol fraction showed the highest potent virulence, with EC50 to Alternaria solani and Valsa mali about 0.09 and 0.279 mg/mL respectively.

其中氯仿部分的抑菌效果较好，当质量浓度为15mg/mL时，其对5种植物病原菌的抑制率均在83%以上；15mg/mL乙酸乙酯部分和正丁醇部分分别对番茄早疫病菌和苹果腐烂病菌有强烈且稳定的抑制作用，抑制率达100.00%，正丁醇部分对这两种菌丝生长抑制毒力最好，EC50分别为0.090和0.279mg/mL。

The phenyl acetate was synthesized from phenyl hydroxide and acetyl chloride by direct esterification and the factors influencing the synthesis were studied.Results showed that the optimal conditions were:n(C6H6O):n(C2H3OCl)=1:1.2,the amount of solvent cyclohexane was 40 mL(compared to 0.15 mol C6H6O),the reaction temperature was 20℃,and the reaction time was 5 h.

乙酸苯酯(分子式C8H8O2)是重要的药物中间体，它可以转化得到邻羟基苯乙酮和对羟基苯乙酮的混合物，可用于治疗急慢性黄疸型肝炎、胆囊炎等疾病，其中邻羟基苯乙酮是合成抗心律失常药盐酸普罗帕酮的重要中间体。

The Company perennial operating a variety of organic chemical raw materials, varieties include: methanol, ethanol, ethylene glycol, n-butyl alcohol, isobutyl alcohol, isopropyl alcohol, acetic acid, vinyl acetate, acetic acid acetate, acetic acid small lipid , styrene, toluene, phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulfuric acid, methyl isobutyl ketone, glycol ether, three toluene, octyl resin, melamine, etc. and so on.

本公司常年经营各种有机化工原料，品种有：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺，等等。

I for Hong Kong and Taiwan-owned business enterprises in the chemical industry more than twenty years of marketing, agent distribution Chemical famous brand, the main service items are as follows: methanol, ethanol, ethylene glycol, n-butyl alcohol, isobutyl alcohol, isopropyl alcohol, ice acetic acid, vinyl acetate, acetic acid acetate, acetic acid Ding resin, styrene, toluene, phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulfuric acid, methyl isobutyl ketone, glycol ether, three toluene, octyl resin, melamine, and so on.

我公司为港台商独资企业，于化工行业行销二十余年，代理经销国外著名化工品牌，主要服务项目如下：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺，等等。

The company operating a variety of perennial organic chemical raw materials, varieties include: methanol, ethanol, ethylene glycol, n-butyl alcohol, isobutyl alcohol, isopropyl alcohol, acetic acid, vinyl acetate, acetic acid acetate, acetic acid Ding resin, styrene, toluene , phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulfuric acid, methyl isobutyl ketone, glycol ether, mesitylene, octyl resin, melamine.

本公司常年经营各种有机化工原料，品种有：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。