Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.foodchem.2013.05.109
Title: Lipase-catalysed ester synthesis in solvent-free oil system: Is it esterification or transesterification?
Authors: Sun, J.
Yu, B.
Curran, P.
Liu, S.-Q. 
Keywords: Coconut oil
Esterification
Lipase
Mechanism
Solvent-free
Transesterification
Issue Date: 2013
Citation: Sun, J., Yu, B., Curran, P., Liu, S.-Q. (2013). Lipase-catalysed ester synthesis in solvent-free oil system: Is it esterification or transesterification?. Food Chemistry 141 (3) : 2828-2832. ScholarBank@NUS Repository. https://doi.org/10.1016/j.foodchem.2013.05.109
Abstract: Ester synthesis was carried out in a solvent-free system of lipase, coconut oil and ethanol or fusel alcohols to ascertain the reaction mechanism. During ester formation, octanoic and decanoic acids increased initially and then decreased gradually, indicating that ester production was a two-step reaction consisting of hydrolysis and esterification, rather than alcoholysis. With ethanol as the alcohol substrate, added butyric acid inhibited ester synthesis. However, when fusel alcohols were used as the alcohol substrate, no significant inhibitory effect by butyric acid was observed. Added octanoic acid did not show any adverse effect on the synthesis of corresponding esters. The results suggest that polarity of the reactants determines lipase activity. This study provides the first evidence on the mechanism of immobilised lipase-catalysed ester synthesis in a solvent-free system involving both hydrolysis and esterification. © 2013 Elsevier Ltd. All rights reserved.
Source Title: Food Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/76446
ISSN: 03088146
DOI: 10.1016/j.foodchem.2013.05.109
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