乙酯

The main esters in Chinese distilled liquor include,ethyl caproate,ethyl acetate,ethyl lactate and ethyl butyrate etc.

中国蒸馏酒中含有一定比例的乙酸乙酯、乳酸乙酯、己酸乙酯和丁酸乙酯等，这几种酯的含量在一定程度上形成了中国蒸馏酒与外国蒸馏酒很不相同的地方。

Water,c12-20 acid peg-8 ester,caprylic/capric triglyceride,proplylene glycol,ppg-15 stearyl ether,chondrus crispus,iris germanica(orris extract/cells),centaurea cyanus,macadamia ternifolia,buxus chinensis,triethanolamine,potassium cetyl phosphate,butyrospermum parkii,c12-13 alkyl lactate,carbomer,phenoxyethanol,methylparaben,imidazolidinyl urea,glyceryl hydroxystearin,tocopheryl acetate.retinyl palmitate,sodium hyaluronate,biosaccharide gum-1,propylparaben,disodium edta,ethylparaben,pentadecalactone,hydroxystearic acid,tetradecyloctadecanoic acid,tetradecyleicosanoic acid,hexadecyleicosanoic acid,butylparaben,isobutylparaben,chlorhexidine digluconate,tocopherol,lecithin,ascorbyl palmitate,glyceryl stearate,glyceryl oleate,BHT,citric acid.

水，C12-20 酸 PEG-8酯，辛酸/癸酸三酸甘油酯，丙二醇，PPG-15 硬脂基醚，卡拉胶萃取，德国鸢尾花提取物/细胞，矢车菊提取物，澳洲坚果油，荷荷巴油，三乙醇胺，十六烷基磷酸钾，牛油果，c12-13烷醇乳酸酯，卡波姆，苯氧乙醇，羟苯甲酯，尿素醛，甘油羟基硬脂酸酯，醋酸盐维他命E，维他命A酯，透明质酸钠，多醣物质，羟苯丙酯，乙酸乙二胺二钠，羟苯乙酯，环十五内酯，羟基硬脂酸，十四烷基十八烷酸，十四烷基二十烷酸，十六烷基二十烷酸，羟苯丁酯，对羟基苯甲酸异丁酯，洗必泰葡萄糖酸盐，维生素E，卵磷脂，抗坏血酸棕榈酸酯，甘油硬脂酸，甘油油酸酯，BHT，柠檬酸。水：几乎所有护肤品成分第一位都是水。辛酸/癸酸三酸甘油酯：润滑剂、扩散剂，棕榈油/椰子油衍生物

The results showed that there were 8 kinds of aliphatic, 5 kinds of esters, 2 kinds of aldehydes, 2 kinds of nitrogen sulfur heterocyclic rings and one kind of hydrocarbon, alcoholics, ketone, lactones respectively in the analyzed 21 kinds of aroma components, and the content of furfural,β-methyl valeric acid, palmitic acid, nicotine, neohytadiene were higher, next were acetyl ethyl propionate, caleric acid, phenyl ethyl acetate, hydroxylic diethyl succinate.

结果表明，在分析出的21种香气成分中，分别有脂肪酸类8种，酯类5种，醛类2种，氮硫杂环类2种，烃类、醇类、酮类、内酯类各l种，其中相对含量较高的物质成分是糠醛、β-甲基戊酸、十六碳酸、烟碱、新植二烯，其次是乙酰丙酸乙酯、异戊酸、苯乙酸乙酯、羟基丁二酸二乙酯等。

A set of laser monitoring observation system to be used for measure the solubility with a high speed, which is programmed heating apparatus , have designed. The solubility of 1,2-cyclohexanediol were measured in water, methyl acetate, acetic ester, propyl acetate, butyl acetate, methyl acrylate, ethyl acrylate, acetoacetic ester at different temperature.

另外，还建立了一套带激光监视系统，可以控制升温速率的溶解度测定实验装置，测定了反式-1，2-环己二醇在水、乙酸甲酯、乙酸乙酯、乙酸丙酯、乙酸丁酯、乙酰乙酸乙酯、丙烯酸甲酯、丙烯酸乙酯和甲基丙基酮等9个二元体系中的溶解度。

objective to determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of edaravone, by gas chromatography.methods sample solution was injected on a gdx column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.the residue was calculated by the external standard method.results the linearity was good over the range of 25 μg/ml～400 μg/ml,with the correlation coefficient of acetone being 0.996 and the average recovery 96.8%.conclusions the method was proved to be simple,rapid,practical and highly sensitive.it is an efficient method for the quality control of acetoacetic ester.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量。方法：采用固定相为二乙烯苯乙基乙烯苯型高分子多孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。结果：该方法在丙酮浓度范围在25 μg/ml～400 μg/ml内呈良好的线性关系，响应曲线相关系数为0.996，平均回收率为96.8%。结论：本法简便，快速、实用，灵敏度高，可有效地用于乙酰乙酸乙酯的质量控制。

Purified water, euphorbia cerifera wax, glyceryl stearate, ammonium acrylates copolymer, butylene glycol, copernica cerifera wax, stearic acid, sucrose acetate isobutyrate, acrylates copolymer, bentonite, tromethamine, hexylene glycol, silk amino acids, cholesterol, glycine, synthetic wax, ethylhexyl glycerin, alanine, PEG-9 dimethicone, nylon-6, lecithin, silica, simethicone, caprylyl glycol, xanthan gum, propylene glycol, isostearic acid, sodium laureth-12 slfate, ceteareth-20, polyvinyl alcohol, sodium chloride, sodium acetate, disodium EDTA, benzyl alcohol, chlorphenesin, phenoxyethanol, methylparaben, ethylparaben, propylparaben, butylparaben, isobutylparaben, may contain /- mica, iron oxides (CI 77491, CI 77492, CI 77499), titanium dioxide (CI 77891), ferric ferrocyanide (CI 77150), ultramarines (CI 77007), blue 1 lake (CI 42090), bronze powder (CI 77400), aluminum powder (CI 77000), bismuth oxychloride (CI 77163), carmine (CI 75740), chromium hydroxide green (CI 77289), chromium oxide greens (CI 77288), yellow 5 lake CI 19140

水，小烛树蜡，硬脂酸甘油酯，丙烯酸铵共聚物，1，3-丁二醇，巴西棕榈蜡，硬脂酸，异丁酸醋酸蔗糖酯，丙烯酸酯共聚物，蒙脱土，二吡喃乙酸乙酯胺，已烯醇，丝氨酸，胆固醇，甘油，合成蜡，异丁基甘油，丙胺酸，PEG-9二甲基硅油，尼龙-6，卵磷酯，硅粉，硅氧烷，癸酰基乙二醇，汉生胶，丙二醇，异硬脂酸，月桂基醚-12硫酸钠，十六十八醇醚-20，聚乙烯醇，氯化钠，醋酸钠，EDTA二钠，苯氧乙醇，氯代苯酚，卞醇，尼泊金甲酯，尼泊金乙酯，尼泊金丙酯，尼泊金丁酯，尼泊金异丁酯，[可能还含有云母，铁黑(CI 77491， CI 77492， CI 77499)，钛白粉(CI 77891)，氰化亚铁(CI 77150)，靛蓝(CI 77007)，蓝1号(CI 42090)，青铜粉(CI 77400)，铝粉(CI 77000)，氯氧化铋(CI 77163)，洋红色素(CI 75740)，氢氧化铬绿(CI 77289)，氧化铬绿(CI 77288)，黄5号(CI 19140)]文章来自网络，不代表本网站立场，版权归原作者所有，转载请注明出处！

The synthesis of sucrose ester containing ethanoyl and oleoyl was performed by transesterification between sucrose octaacetate and ethyi oleate in organic solvents, using lipases Novo435 as the catalyst.

在有机溶剂中，以脂肪酶Novo435为催化剂，蔗糖八乙酸酯与油酸乙酯通过转酯化反应合成了同时含有油酸酰基和乙酸酰基的混合型蔗糖酯，当蔗糖八乙酸酯与油酸乙酯的物质的量之比为1：1时，油酸乙酯的转化率达95％。

The first synthetic route uses 1,2,4-trimethoxybenzene and chloroacetonitrile in forming 2,4,5-trimethoxy-a-chlor-acetophenone under the anhydrous condition, then the intermediate condensates with papaverine forming the core pyrro[2,l-a]isoquinoline, followed by formation and lactonization to form the lactone ring. The second synthetic route uses prepared aldehyde with prepared ethyl nitroacetate by Knoevenagel condensation to obtain 2-Nitro-3-(2,4,5-tris-methoxy-phenyl)-acrylic acid ethyl ester and 2-Nitro-3-(2,4,5-tris-benzyloxy -phenyl)-acrylic acid ethyl ester etal intermediates. The lamellarin skeleton could arise from condensation of the papaverine and these intermediates by Michael reaction, the ester group is provided for subsequent lactonization. The third synthetic route uses coumarin or indan-l,3-dione derivatives and papaverine to form lamellarin under basic conditions.

第一条路线首先从1，2，4-三甲氧基苯出发与卤乙腈作用合成卤代芳酮中间体，然后与罂粟碱反应合成开链片螺素，最后经乙酰化、去保护、成内酯环得到片螺素；第二条路线由制备的芳醛和制备的硝基乙酸乙酯经缩合得到2-硝基-3-芳基丙烯酸乙酯，然后由该中间体与罂粟碱反应，在完成关环的同时也引入酯基，最后去保护、成内酯环得到片螺素；第三条路线是由香豆素或茚二酮出发，经溴代后的中间体与罂粟碱反应，得到片螺素的基本框架。

Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethyl malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effective base.

在这类催化反应中，碱的选择具有重要的影响：以K3PO4为碱， Pd2/L1催化体系在丙二酸二乙酯的α-芳基化中，富电子溴代芳烃显示较好的活性； Pd2/L1催化的乙酰乙酸乙酯α-芳基化时，以 K2CO3为碱，催化体系显示较好的活性，这个催化体系可控制反应得到α-芳基乙酰乙酸乙酯，而不是脱乙酰基的产物。

Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethy malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effectiv base.

在这类催化反应中，碱的选择具有重要的影响：以K3PO4为碱，Pd2/L1催化体系在丙二酸二乙酯的α-芳基化中，富电子溴代芳烃显示较好的活性；Pd2/L1催化的乙酰乙酸乙酯α-芳基化时，以K2CO3为碱，催化体系显示较好的活性，这个催化体系可控制反应得到α-芳基乙酰乙酸乙酯，而不是脱乙酰基的产物。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。