乙酯

Caproic acid is produced by the fermentation of caproic acid bacteria.In old pits,there is the"species－H2－transformation"between methane bacteria and caproic acid bacteria.

老窖中存在己酸菌与甲烷菌的&种间氢转移关系&，甲烷发酵有促进己酸发酵进程多产己酸的作用，从而增加己酸乙酯含量，提高酒质。

It was increased ethyl hexanoate synthesis substrate concentration mediated by Rhizopus chinensis 2113 whole-cell lipase after improved synthetic activity and optimized reaction condition. The reaction condition were: caproic acid concentration 2.4mol/L, substrate molar concentration ratio 1:1.1, initial water content ≤0.2%, lipase water activity 0.3~0.66, enzyme amount 16%, reaction temperature 30℃, agitation speed 150 r/min.

通过合成酶活的提高及反应条件的优化，提高了华根霉2113全细胞脂肪酶催化己酸乙酯合成的反应底物浓度，其反应条件为：己酸浓度为2.4mol/L；酸醇摩尔浓度比1：1.1；反应体系含水量≤0.2%；脂肪酶水活度0.3～0.66；加酶量16%；反应温度30℃；150r/min振荡反应。

The sodium salt condensed with phenyl hydrazine in the acid condition to prepare 1 phenyl 3 carbethoxy 5 pyrazolone.

用此盐与苯肼在酸性条件下进行加成缩合反应可制得 1 苯基 3 羧酸乙酯 5 吡唑啉酮。

The optimal conditions of cetyl trimethyl ammonium bromidereverse micellar system,and the most suitable reaction conditions of synthesis of ethyl oleate by Lipex lipase were determined.

研究了CTAB逆胶束体系的适宜构建条件以及Lipex脂肪酶催化合成油酸乙酯的适宜反应条件。

Synthesis of ethyl chloroacetate with chloroacetic acid and ethanol catalysed by GdCl2-EDTB-H3SiW12O40was investigated.

研究了反应时间、醇酸比、带水剂用量及催化剂用量对杂多酸化合物GdCl2-EDTB-H3SiW12O40催化合成氯乙酸乙酯的影响，确定了最佳反应条件，醇酸摩尔比1.5∶1，带水剂量10mL，催化剂使用量为酸的1.0%，反应时间2.5h

The optimum synthetic conditions of ethyl chloroacetate are: molar ratio of chloroacetic acid to ethanol is 1:8, the quantity of catalyst[Fe2(SO4)3 xH2O] is 10% of the mass of chloroacetic acid, reaction time is 1 hour, 5A zeolite was used as dehydrating agent. In these conditions, the yield of ethyl chloroacetate was up to 73%.

用Fe_2(SO_4)_3·xH_2O作为催化剂合成氯乙酸乙酯的较佳反应条件是：酸醇物质的量之比为1：8，催化剂用量为氯乙酸质量的10％，以5A分子筛作为脱水剂，回流时间1h，收率达73％以上。

Gold nanoparticles were prepared with chemical reduction method and the size was controlled via adjusting the molar ratio of citric acid to chloroauric acid.

采用柠檬酸钠还原氯金酸法制备金溶胶，以正硅酸乙酯为硅源，氨水作催化剂，制备以金为核，二氧化硅为壳的核壳纳米粒子。

We used ethyl chloroformate derivatization and gas chromatographymass spectrometry based metabonomic method to analyze rat urines.

利用基于氯甲酸乙酯衍生、GCMS技术的代谢组学方法。

In order to find biologically active urea compounds,seven new N-[5-(3-pyridyl)-1,3,4-thiadiazol-2-yl]-N'- urea derivatives were synthesized by the reaction of 2-amino-5-(3-pyridyl)-1,3,4-thiadiazole with aroylazides,which were prepared starting from carboxylic acids,ethyl chloroformate and sodium azide by one-pot procedure.

为了寻找高生物活性的脲类化合物，通过2-氨基-5-(3-吡啶基)-1，3，4-噻二唑与酰基叠氮化物反应，设计合成了7个新的N-[5-(3-吡啶基)-1，3，4-噻二唑-2-基]-N'-取代苯基脲，其中芳酰基叠氮化物是以芳酸、氯甲酸乙酯、叠氮化钠为起始原料采用&一锅法&所制得。

Two methods (Bondi Mueller method and Cortese method )which need not ethyl chloroformate as material or reagent for the synthesis of sodium taurocholate are selected for comparative studies,and the technical conditions,purity and yield of products related to the two methods are compared.

选择无需用氯甲酸乙酯作原料的邦迪缪勒法和柯特斯法进行牛磺胆酸钠的合成研究。

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。