Abstract
Enzymatic synthesis of sn-1,3-diacylglycerols ( sn-1,3-DAG) in two steps without isolation of the intermediates was investigated. Firstly ethanolysis of extra virgin olive oil (EVO) using immobilized non-regiospecific lipase from Candida antarctica (Novozym 435) was carried out to obtain glycerol (Gly) and fatty acid ethyl esters (FAEE). In the second step the ethanolysis products have been re-esterificated testing different sn-1,3-regiospecific lipases, both immobilized and non-immobilized, in different reaction media, that is in the presence of solvents or in a solvent-free system, for different times, at different temperatures (12, 25 and 40 °C). The lipase from Rhizomucor miehei (Lipozyme IM) has been the most effective among the sn-1,3-specific lipases screened.
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