戊醇

The influences of mole ratio of ethanediol and naphthenic acid,a mount of catalyst,reation time,reation temperature etc.on est erification were discussed and the suitable processing conditions were found.

文摘：介绍了用氧化亚锡非酸性催化剂催化合成环烷酸季戊四醇脂的方法，通过讨论醇酸摩尔比、催化剂用量、反应时间、反应温度等因素对该脂化反应的影响，从而确定了适宜的工艺条件。

Copolyesters of sebacic/terephthalic acid series was synthesized by the condensation polymerization of sebacic acid and terephthalic acid with ethanediol and neopentyl glycol.

论文采用癸二酸、对苯二甲酸与乙二醇、新戊二醇进行缩聚反应，合成了癸二酸/对苯二甲酸系共聚酯。

The synthesis of green oxane from isobutyl aldehyde and 2,2,4-trimethy-1,3- pentanediol catalysed by HY zeolite was studied. The effects of ratio of reactants,temperature,solvent,dosage and the recycling of catalyst were investigated.

研究了以异丁醛和2，2，4-三甲基-1，3-戊二醇为原料，HY沸石分子筛为催化剂合成了青叶口恶烷的反应，考察了醛醇比、反应时间、带水剂、催化剂用量与其循环使用性对该反应的影响。

Escherichia coli and many other microoganism synthesize aromatic amino acids through the condensation reaction between phospho enolpyruvate and erythro.

ppsA和tktA是芳香族氨基酸生物合成中心途径的两个关键酶基因，在大肠杆菌中，ppsA基因编码磷酸烯醇式丙酮酸合成酶A ，该酶催化丙酮酸合成磷酸烯醇式丙酮酸；tktA基因编码转酮酶A ，该酶在磷酸戊糖途径中生成 4 磷酸赤藓糖起主要作用。

Results The mixing, loading and storing processes of the construction, might generate lots of occupational hazards, including toluene, dimethylbenzene, trimethylbenzene, isopropanol, butyl alcohol, propanol, methyl methacrylate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetic ether, nitro-cotton, n-hexane, n-heptane, carbinol, ethanol, ethyl propionate, diisobutyl ketone, glycol ether, isoamyl acetate, 2,4-toluene diisocyanate, isophorone, noise, power frequency electric fields.

结果 该项目在混兑生产和装卸、仓储过程中，可能产生的职业病危害因素主要有甲苯、二甲苯、三甲苯、异丙醇、丁醇、丙醇、甲基丙烯酸甲酯、乙酸丁酯、甲基异丁基甲酮、丁酮、乙酸乙酯、硝化棉、正己烷、正庚烷、甲醇、乙醇、乙酸丙酯、二异丁基甲酮、乙二醇乙醚、乙酸异戊酯、2，4甲苯二异氰酸酯、异佛尔酮、噪声、工频电场。

And 27.87%, 41.54%, 14.43% in the total volatile compounds of the abdominal and dorsal muscle. Sciaenops ocellatus has the fishy, specific grassy, fatty and melon-like odor. Hexanal and1-Penten-3-ol contribute to the form of fishy smell most greatly, also the environment and the cooperative or accumulative effects of other volatile compounds have certain impacts. Compared withthe dorsal muscle, the abdominal muscle is fishier (F0.01). 1-Octen-3-ol, 4-Heptenal and benzaldehyde have close relations to the form of characteristic flavor.

美国红鱼具有以腥臭味、青草味、脂香和瓜果类香气等混合的气味；己醛和1-戊烯-3-醇对美国红鱼腥味的形成贡献最大，环境以及其它挥发性风味组分的协同或累加作用对腥味的形成也有一定影响；与背肉相比，腹肉腥味明显(F0.01)； 1-辛烯-3-醇、4-庚烯醛、苯甲醛等物质与美国红鱼特征风味的形成密切相关。

Sciaenops ocellatus has the fishy, specific grassy, fatty and melon-like odor. Hexanal and1-Penten-3-ol contribute to the form of fishy smell most greatly, also the environment and the cooperative or accumulative effects of other volatile compounds have certain impacts. Compared with the dorsal muscle, the abdominal muscle is fishier (F0.01). 1-Octen-3-ol, 4-Heptenal and benzaldehyde have close relations to the form of characteristic flavor.

美国红鱼具有以腥臭味、青草味、脂香和瓜果类香气等混合的气味；己醛和1-戊烯-3-醇对美国红鱼腥味的形成贡献最大，环境以及其它挥发性风味组分的协同或累加作用对腥味的形成也有一定影响；与背肉相比，腹肉腥味明显(F0.01)； 1-辛烯-3-醇、4-庚烯醛、苯甲醛等物质与美国红鱼特征风味的形成密切相关。

And 27.87%, 41.54%, 14.43% in the total volatile compounds of the abdominal and dorsal muscle. Sciaenops ocellatus has the fishy, specific grassy, fatty and melon-like odor. Hexanal and1-Penten-3-ol contribute to the form of fishy smell most greatly, also the environment and the cooperative or accumulative effects of other volatile compounds have certain impacts. Compared withthe dorsal muscle, the abdominal muscle is fishier (F0.01). 1-Octen-3-ol, 4-Heptenal and benzaldehyde have close relations to the form of characteristic flavor.

美国红鱼具有以腥臭味、青草味、脂香和瓜果类香气等混合的气味；己醛和1-戊烯-3-醇对美国红鱼腥味的形成贡献最大，环境以及其它挥发性风味组分的协同或累加作用对腥味的形成也有1定影响；与背肉相比，腹肉腥味明显(F0.01)； 1-辛烯-3-醇、4-庚烯醛、苯甲醛等物质与美国红鱼特征风味的形成密切相关。

And 27.87%, 41.54%, 14.43% in the total volatile compounds of the abdominal and dorsal muscle. Sciaenops ocellatus has the fishy, specific grassy, fatty and melon-like odor. Hexanal and1-Penten-3-ol contribute to the form of fishy smell most greatly, also the environment and the cooperative or accumulative effects of other volatile compounds have certain impacts. Compared with 字串5the dorsal muscle, the abdominal muscle is fishier (F0.01). 1-Octen-3-ol, 4-Heptenal and benzaldehyde have close relations to the form of characteristic flavor.

美国红鱼具有以腥臭味、青草味、脂香和瓜果类香气等混合的气味；己醛和1-戊烯-3-醇对美国红鱼腥味的形成贡献最大，环境以及其它挥发性风味组分的协同或累加作用对腥味的形成也有一定影响；与背肉相比，腹肉腥味明显(F0.01)； 1-辛烯-3-醇、4-庚烯醛、苯甲醛等物质与美国红鱼特征风味的形成密切相关。

Formic acid, hexyl ester and Z-3-Hexen-1-ol were preliminarily confirmed to be the important substances for attracting woolly apple aphid, but 4-methyl-1, 3-pentadiene and Z-3-hexen-1-ol, acetate were not.

初步确定，E-3-己烯－1-醇、甲酸己酯可能是对苹果绵蚜有较强引诱作用的重要物质；4-甲基－1，3-戊二烯、乙酸叶醇酯不是引诱苹果绵蚜的物质。

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。