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.
journal_name
Food Chemjournal_title
Food chemistryauthors
Sun J,Yu B,Curran P,Liu SQdoi
10.1016/j.foodchem.2013.05.109subject
Has Abstractpub_date
2013-12-01 00:00:00pages
2828-32issue
3eissn
0308-8146issn
1873-7072pii
S0308-8146(13)00711-5journal_volume
141pub_type
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