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National Chung Hsing University Institutional Repository - NCHUIR > 學術研究中心 > 生物科技發展中心 > 依資料類型分類 > 期刊論文 >  Optimized synthesis of lipase-catalyzed octyl caffeate by Novozym (R) 435

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/130937

標題: Optimized synthesis of lipase-catalyzed octyl caffeate by Novozym (R) 435
作者: Chen, H.C.;Twu, Y.K.;Chang, C.M.J.;Liu, Y.C.;Shieh, C.J.
關鍵字: Esterification;Lipase;Octyl caffeate;Phenolic acid;Response surface;methodology;phenolic-acids;esters
日期: 2010
Issue Date: 2012-12-07 16:11:13 (UTC+8)
關連: Industrial Crops and Products, Volume 32, Issue 3, Page(s) 522-526.
摘要: In this study, optimization of the enzymatic synthesis of octyl caffeate (OC), catalyzed by an immobilized lipase (Novozym (R) 435) from Candida antarctica was investigated. Novozym (R) 435 was used to catalyze the caffeic acid and octanol in an isooctane system. Response surface methodology (RSM) and 5-level-4factor central-composite rotatable design (CCRD) were employed to evaluate the effects of the synthesis parameters, such as reaction temperature (40-80 degrees C), reaction time (24-72h), substrate molar ratio of caffeic acid to octanol (1:20-1:100), and enzyme amounts (100-500 PLU) on the percentage conversion of OC by direct esterification. Reaction temperature and time had significant effects on the percent conversion. Based on ridge max analysis, the optimum conditions for synthesis were: reaction time of 55 h, reaction temperature of 75 degrees C, substrate molar ratio of 1:78, and enzyme amount of 317 PLU. The molar conversions of predicted and actual experimental values were 93.79% and 90.34 +/- 1.38%. respectively. (C) 2010 Elsevier B.V. All rights reserved.
Relation: Industrial Crops and Products
Appears in Collections:[依教師分類] 張傑明
[依教師分類] 劉永銓
[依資料類型分類] 期刊論文

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