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Solvent-free enzymatic transesterification of ethyl ferulate and monostearin: Optimized by response surface methodology

Paper ID Volume ID Publish Year Pages File Format Full-Text
23328 43431 2013 6 PDF Available
Title
Solvent-free enzymatic transesterification of ethyl ferulate and monostearin: Optimized by response surface methodology
Abstract

In this study, enzymatic transesterification of ethyl ferulate (EF) and monostearin for feruloylated lipids production was investigated. Enzyme screening and the effect of feruloyl acceptors on the transesterification were also studied. Effects of reaction variables (reaction temperatures, enzyme load, and reaction time) on the transesterification were optimized using response surface methodology (RSM). The optimum conditions were as follows: reaction temperature 74 °C, reaction time 23 h, and enzyme load 20% (w/w, relative to the weight of substrates). Under these conditions, EF conversion was 98.3 ± 1.1%, and the transesterification product was consisted of 19.2 ± 2.1% glyceryl ferulate (FG), 32.9 ± 1.9% diferuloylated glycerols (DFG), 36.6 ± 2.2% feruloylated monoacylglycerols (FMAG), 9.1 ± 2.0% feruloylated diacylglycerols (FDAG), and 0.5% ferulic acid (FA). Analysis of variance (ANOVA) showed that the regression equation was adequate for predicting EF conversion. The activation energies for hydrolysis to form FG + DFG and transesterification to form FMAG + FDAG were calculated as 22.45 and 51.05 kJ/mol, respectively, based on Arrhenius law.

► Feruloylated lipids were prepared by transesterification of EF with monostearin. ► Higher EF conversion (98.3 ± 1.1%) was achieved under optimized conditions by RSM. ► The activation energy for hydrolysis to form FG + DFG was 22.45 kJ/mol. ► Activation energy for transesterification to form FMAG + FDAG was 51.05 kJ/mol.

Keywords
Solvent-free system; Enzymatic transesterification; Ethyl ferulate; Monostearin; Response surface methodology
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Solvent-free enzymatic transesterification of ethyl ferulate and monostearin: Optimized by response surface methodology
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 164, Issue 2, March 2013, Pages 340–345
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us