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Open AccessArticle

Cross-Linked Microencapsulation of CO2 Supercritical Extracted Oleoresins from Sea Buckthorn: Evidence of Targeted Functionality and Stability

Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, 800008 Galați, Romania
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Academic Editor: Jolanta Sereikaitė
Molecules 2020, 25(10), 2442; https://doi.org/10.3390/molecules25102442
Received: 12 May 2020 / Revised: 21 May 2020 / Accepted: 22 May 2020 / Published: 23 May 2020
Oleoresin supercritical extracts from sea buckthorn were microencapsulated in whey proteins isolate and casein, in two states: native (N) and cross-linked mediated by transglutaminase (TG). The encapsulation efficiency showed values higher than 92% for total carotenoids and lycopene. Phytochemicals content was 352.90 ± 1.02 mg/g dry weight (DW) for total carotenoids in TG and 302.98 ± 2.30 mg/g DW in N, with antioxidant activity of 703.13 ± 23.60 mMol Trolox/g DW and 608.74 ± 7.12 mMol Trolox/g DW, respectively. Both powders had an inhibitory effect on α-glucosidase, of about 40% for N and 35% for TG. The presence of spherosomes was highlighted, with sizes ranging between 15.23–73.41 µm and an agglutination tendency in N, and lower sizes, up to 35 µm in TG. The in vitro digestibility revealed a prolonged release in an intestinal environment, up to 65% for TG. Moisture sorption isotherms were studied at 20 °C and the shape of curves corresponds to sigmoidal type II model. The presence of cross-linked mediated aggregates in TG powders improved stability and flowability. Our results can be used as evidence that cross-linked aggregates mediated by transglutaminase applied for microencapsulation of oleoresins have the potential to become new delivery systems, for carotenoids and lycopene, being valuable in terms of their attractive color and biological and bioaccessibility properties. View Full-Text
Keywords: cross-linking; oleoresins; sea buckthorn; microencapsulation; whey proteins; caseins; transglutaminase; functional properties cross-linking; oleoresins; sea buckthorn; microencapsulation; whey proteins; caseins; transglutaminase; functional properties
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Neagu, C.; Mihalcea, L.; Enachi, E.; Barbu, V.; Borda, D.; Bahrim, G.E.; Stănciuc, N. Cross-Linked Microencapsulation of CO2 Supercritical Extracted Oleoresins from Sea Buckthorn: Evidence of Targeted Functionality and Stability. Molecules 2020, 25, 2442.

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