Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/60468
標題: Optimization of ultrasound-accelerated synthesis of enzymatic caffeic acid phenethyl ester by response surface methodology
作者: Chen, H.C.
陳建華
Chen, J.H.
Chang, C.
Shieh, C.J.
謝淳仁
關鍵字: Caffeic acid phenethyl ester;Lipase;Optimization;Response surface;methodology (RSM);Ultrasound;lipase-catalyzed synthesis;phenolic-acids;cinnamic acid;cells;toxicity;propolis
Project: Ultrasonics Sonochemistry
期刊/報告no:: Ultrasonics Sonochemistry, Volume 18, Issue 1, Page(s) 455-459.
摘要: 
The ultrasound-accelerated enzymatic synthesis of caffeic acid phenethyl ester (CAPE) from caffeic acid and phenethyl alcohol was investigated in this study. A commercial immobilized lipase from Candida antarctica, called Novozym (R) 435, was used as the catalyst. A 5-level-4-factor central-composite rotatable design (CCRD) and response surface methodology (RSM) were employed to evaluate the effects of reaction time, substrate molar ratio, enzyme amount, and ultrasonic power on percent molar conversion of CAPE. The results indicated that reaction time, substrate molar ratio, and ultrasonic power significantly affected percent molar conversion, whereas enzyme amount did not. A model for synthesis of CAPE was established. Based on ridge max analysis, the optimum condition for CAPE synthesis was predicted to be reaction time 9.6 h, substrate molar ratio 1:71, enzyme amount 2938 PLU, and ultrasonic power 2 W/cm(2) with the molar conversion value of 96.03 +/- 5.18%. An experiment was performed under this optimal condition and molar conversion of 93.08 +/- 0.42% was obtained. (C) 2010 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/60468
ISSN: 1350-4177
DOI: 10.1016/j.ultsonch.2010.07.018
Appears in Collections:分子生物學研究所

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