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TitleFortified beeswax oleogels: Effect of β-carotene on the gel structure and oxidative stability
Author(s)Martins, Artur J.
Cerqueira, Miguel A.
Cunha, Rosiane L.
Vicente, A. A.
Issue date2017
PublisherRoyal Society of Chemistry
JournalFood and Function
CitationMartins, Artur J.; Cerqueira, Miguel A.; Cunha, Rosiane L.; Vicente, António A., Fortified beeswax oleogels: effect of -carotene on the gel structure and oxidative stability. Food and Function, 8, 4241-4250, 2017
Abstract(s)This study was aimed at evaluating the physical conformation and oxidative stability of beeswax oleogels when fortified by the incorporation of [small beta]-carotene (complex-beeswax oleogels). Rheological evaluation showed the presence of a strengthened structural conformation in the oleogels with [small beta]-carotene in comparison with that in oleogels without [small beta]-carotene; this was verified by the increase in rheological parameters. Small angle X-ray scattering data show that the lamellar crystal structure of the oleogels with [small beta]-carotene exhibits similar d-spacings and lower radius of gyration (Rg) values for all concentrations due to the stronger oleogel network. X-ray diffraction measurements provide useful information on the crystal polymorphism type and arrangement of the internal lamellar phases of the crystals. Oil binding capacity is also affected by the incorporation of [small beta]-carotene into the oleogel and proven to be higher for the complex-beeswax oleogels, which enhances the ability of the oleogels to retain an oil phase within their crystalline network. The oxidative profiles of the complex-beeswax oleogels were studied during storage, and beeswax at the concentrations of 4, 6, and 8% revealed higher oxidative stability than that at the concentration of 2%. In this study, the possibility of tailoring the properties of oleogels is demonstrated considering the foreseen applications of oleogels in food products, such as in texturizers, as well their capacity to deliver bioactives and thus add value to food products.
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Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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