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Argan oil as a rich source of linoleic acid for dietetic structured lipids production
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Orientador(es)
Resumo(s)
Argan oil is rich in long-chain unsaturated fatty acids (FA), mostly oleic and linoleic, and
natural antioxidants. This study addresses the production of low-calorie structured lipids by acidolysis
reaction, in a solvent-free system, between caprylic (C8:0; system I) or capric (C10:0; system II) acids
and argan oil, used as triacylglycerol (TAG) source. Three commercial immobilized lipases were tested:
Novozym® 435, Lipozyme® TL IM, and Lipozyme® RM IM. Higher incorporation degree (ID) was
achieved when C10:0 was used as acyl donor, for all the lipases tested. Lipozyme® RM IM yielded
the highest ID for both systems (28.9 º 0.05 mol.% C10:0, and 11.4 2.2 mol.% C8:0), being the only
catalyst able to incorporate C8:0 under the reaction conditions for biocatalyst screening (molar ratio
2:1 FA/TAG and 55 ºC). The optimal conditions for Lipozyme® RM IM in system II were found by
response surface methodology (66 ºC; molar ratio FA/TAG of 4:1), enabling to reach an ID of 40.9 mol.%
of C10:0. Operational stability of Lipozyme® RM IM in system II was also evaluated under optimal
conditions, after eight consecutive 24 h-batches, with biocatalyst rehydration between cycles. The
biocatalyst presented a half-life time of 103 h
Descrição
Palavras-chave
Argania spinosa oil capric acid caprylic acid commercial immobilized lipases low-calorie structured lipids
Contexto Educativo
Citação
Simões, T.; Ferreira, J.; Lemos, M.F.L.; Augusto, A.; Félix, R.; Silva, S.F.J.; Ferreira-Dias, S.; Tecelão, C. Argan Oil as a Rich Source of Linoleic Fatty Acid for Dietetic Structured Lipids Production. Life 2021, 11, 1114
Editora
MDPI