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Title

Discrimination against diacylglycerol ethers in lipase-catalysed ethanolysis of shark liver oil

AuthorsFernández, Oscar; Vázquez de Frutos, Luis ; Reglero, Guillermo ; Torres, Carlos F.
KeywordsEthanolysis
Ether lipids
Lipase
Shark liver oil
Alkylglycerol
Issue Date2013
PublisherElsevier
CitationFood Chemistry 136(2): 464-471 (2013)
AbstractLipase-catalysed ethanolysis of squalene-free shark liver oil was investigated. The mentioned shark liver oil was comprised mainly of diacylglycerol ether and triacylglycerols. In order to test discrimination against diacylglycerol ether, up to 10 different lipases were compared. The ratio of oil to ethanol and lipase stability were also evaluated. Surprisingly, lipase from Pseudomonas stutzeri was the fastest biocatalyst among all assayed, although poor discrimination against diacylglycerol ether was observed. The best results in terms of selectivity and stability were obtained with immobilised lipase from Candida antarctica (Novozym 435). Ethanolysis reaction after 24 h in the presence of Novozym 435 produced total disappearance of triacylglycerol and a final reaction mixture comprised mainly of diacylglycerol ethers (10.6%), monoacylglycerol ethers (32.9%) and fatty acid ethyl esters (46.0%). In addition, when an excess of ethanol was used, diacylglycerol ethers completely disappeared after 15 h, giving a final product mainly composed of monoacylglycerol ethers (36.6%) and fatty acid ethyl esters (46.4%). © 2012 Elsevier Ltd. All rights reserved.
URIhttp://hdl.handle.net/10261/99918
DOI10.1016/j.foodchem.2012.08.004
Identifiersdoi: 10.1016/j.foodchem.2012.08.004
issn: 0308-8146
Appears in Collections:(CIAL) Artículos
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