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Design and Development of Oleoresins Rich in Carotenoids Coated Microbeads

1
Department of Food Science and Technology, Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Calea Mănăştur 3-5, 400372 Cluj-Napoca, Romania
2
Biozoon Food Innovations GmbH, Nansenstrasse 8, 27572 Bremerhaven, Germany
3
CENCIRA Agrofood Research and Innovation Centre, Ion Meșter 6, 400650 Cluj-Napoca, Romania
*
Authors to whom correspondence should be addressed.
Coatings 2019, 9(4), 235; https://doi.org/10.3390/coatings9040235
Received: 21 March 2019 / Revised: 1 April 2019 / Accepted: 2 April 2019 / Published: 4 April 2019
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Abstract

The aim of this study was to encapsulate the oleoresins rich in carotenoids extracted from sea buckthorn (Hippophae rhamnoides) fruits into a blend of sodium-alginate and κ-carrageenan microbeads (2% w/v) coated by a sodium-alginate (2% w/v) layer prepared using an ionotropic gelation technique with calcium chloride (2% w/v) by dropping method. The fresh obtained coated microbeads had a “fried eggs” like appearance with a size distribution ranging from 4 to 6 mm. The coated microbeads were analyzed for their SEM and fluorescence. The encapsulation efficiency was 92%. Their stability was investigated by evaluation of the physical integrity performance in aqueous media with different pH to mimic the gastrointestinal tract for 24 h at 37 °C under laboratory conditions. The results demonstrated the limitation of the coated microbeads swelling ability under pH 7. The coated microbeads could be a good tool to guarantee oleoresins rich in carotenoids stability and colon delivery. The present study shows an attractive encapsulation system of oleoresins, in order to obtain stable products for further applications. View Full-Text
Keywords: alginate; coated; carrageenan; microbeads; crosslinking; carotenoids alginate; coated; carrageenan; microbeads; crosslinking; carotenoids
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Trif, M.; Vodnar, D.C.; Mitrea, L.; Rusu, A.V.; Socol, C.T. Design and Development of Oleoresins Rich in Carotenoids Coated Microbeads. Coatings 2019, 9, 235.

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