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Both in green house and in the open field ,relative content and total content of characteristic aroma components:of butanoic acid, methyl ester; butanoic acid, ethyl ester; hexanoic acid, methyl ester; hexanoic acid, ethyl ester; DMHF; DMMF trended to increase and then decline with the increment of nitrogen fertilizer, and the highest was the Mid-N fertilizer treatment. So favorable nitrogen application can promote the process of fruit aroma, that is , feasible fertilizer application could enhance fruit flavor.

在温室和露地两种栽培条件下，除成熟草莓果实的特征香气成分丁酸甲酯、丁酸乙酯、己酸甲酯、己酸乙酯、DMHF、DMMF的相对含量和总量均是随施氮量增加先增加后减少，中量氮肥处理最高，合理的施氮量有利于果实香气的形成，即适宜的施肥量有利于增进果实风味。3。

Ethyl 4-[(1-hydroxy-1-methyl)ethyl]-2-propyl-1H-imidazole-5-carboxylate,the key intermediate of Olmesartan ,was synthesized from butanoic acid and o-phenylenediamine via condensation under microwave-irradiation,oxidation,esterification and the Gringard reaction.

用正丁酸与邻苯二胺为原料，在微波照射下缩合成2-丙基苯并咪唑，再氧化开环制得2-丙基咪唑二羧酸，再经酯化、Gringard反应制得抗高血压药物奥美沙坦的关键中间体2-丙基-4-[(1-羟基-1-甲基)乙基]-1H-咪唑-5-羧酸乙酯，总收率32.2%。

Mainly engaged in: Hydrogen-imide hydrochloride, o-chlorophenyl cyclopentanone, 3.4 dimethoxy ethyl benzene, butyn single potassium acid, potassium ethyl malonyl, Ding amide, amide isobutyraldehyde , allyl chloroacetate, isopropyl chloroacetate Benzyl aluminum, cyclopentene, cyanide-o-chlorophenyl, o-methyl chloride, sulfuric acid chloride, p-chlorophenol, imidazole, Pinacolone, one chlorine Pinacolone.

主要经营：盐酸氢亚胺、邻氯苯基环戊酮、3.4二甲氧基苯乙酯、丁炔二酸单钾盐、丙二酸单乙酯钾盐、丁酰胺、异丁酰胺、氯乙酸烯丙酯、氯乙酸苄酯异丙醇铝、环戊烯、邻氯苯氰、邻氯苯甲酯氯、硫酸氯、对氯苯酚、咪唑、频呐酮、一氯频呐酮。

The results showed that new-type solid ferric potassium alum was a good catalyst for the synthesis of ethyl decanoate and the optimum conditions were as follows: molar ratio of acid to alcohol was 1:2, the use level of catalyst was 0.6g/0.05 mol capric acid, water-taking reagent benzene was 15 mL, reaction time was 2.5 h and the yield of ethyl decanoate could reach 98%.

结果表明，新型固体酸铁钾矾是合成葵酸乙酯的良好催化剂，在酸醇物质的量比为1：2，催化剂用量为0.69（0.05 mol癸酸），带水剂苯为15mL，反应时间为2.5h的条件下，癸酸乙酯的酯化率可达98%。

Ethyl caproate and ethyl lactate are the main flavour components of Luzhou－flavour liquor and their ratio is the key to the style and flavour of the liquor.

摘 要：己酸乙酯和乳酸乙酯是浓香型白酒风味物质的主体成分，己、乳比是影响浓香型白酒风味、风格的关键。

The results showed that temperature rise would inhibit their esterification capacity, ethyl caproate-producing capability of raw zymin of 1# high-temperature monascus improved with the prolong of the esterification time when ethanol concentration was 4 %vol and caproic acid content was 4 mL, and when ethanol concentration and caproic acid content was within proper range, caproic acid content had more effects on the formation of ethyl caproate by raw zymin than ethanol concentration.

结果表明，温度相对升高对其酯化力的形成有一定的抑制作用；高温型红曲1#酯化菌株粗酶制剂的酯化力在乙醇浓度为4 %vol、己酸含量为4 mL时，产生己酸乙酯的能力随酯化时间的延长而增强；在适宜的乙醇浓度和己酸含量范围内，己酸含量对酯化酶粗酶制剂己酸乙酯生成影响比乙醇含量的影响大。

It was observed after 24hrs of reaction that this lipase could compete very well with lipase from Candida antartica (93. 0％ for isoamyl butyrate synthesis and 95. 0％ for ethyl caproate synthesis) and lipase from Mucor miehei (75. 0％ for isoamyl butyrate synthesis and 93. 64％ for ethyl caproate synthesis).

反应24h后，来自Candida antartica脂肪酶合成丁酸异戊酯和己酸乙酯的转化率分别为93.0％和95.0％，来自Mucor miehei脂肪酶合成丁酸异戊酯和己酸乙酯的转化率分别为75.0％和93.64％。

Sesame-flavor liquor (produced by the combination of Luzhou-flavor liquor production techniques, Maotai-flavor liquor production techniques and Fen-flavor production techniques) contains multiple flavoring compositions including ethyl acetate, ethyl caproate, pyrazine, furan, phenols, thiazole and sulfur compound etc. The coexistence of those flavoring compositions in proper proportion finally forms the special sesame flavor.

其与浓清酱工艺的巧妙结合，香气成分复杂，除含适量的乙酸乙酯、己酸乙酯外，主要还含类似焦香的吡嗪类与呋喃类、酚类、噻唑、含硫化合物等成分，这些成分以适当的比例共存时才能构成芝麻香的特有香气。

The main component was methoxy-ethyl cinnamate with content of 40.96%,next was ethyl cinnamate with content of 23.68%.

主要成分是对甲氧基肉桂酸乙酯，含量为40.96%；其次是肉桂酸乙酯，含量为23.68%。

The wastewater from gum benzion production contains benzaldehyde, cyanide, gum benzoin and ethyl benzoate. When the cyanide is determined by isonicotinic acidpyrazalon method, the ethyl benzoate is distilled and goes into NaOH absorption liquid with cyanide in the process of predistillation, because its boiling point is low. Thus the absorption liquid produces a great deal of foam and feculence.

摘要］有机化工产品安息香生产废水中含有苯甲醛、氰化物、安息香和苯甲酸乙酯，在用异烟酸吡唑啉酮法对其进行氰化物测定时，由于油酯类的沸点较低，在预蒸馏过程中被蒸出和氰化物一起进入NaOH吸收液，使得吸收液产生大量泡沫和沉淀，严重干扰后续比色测定。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。