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Formation and characterization of spray dried coated and uncoated liposomes with encapsulated black carrot extract

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Abstract The degradation of black carrot anthocyanins (BCE) under stress conditions as under the effect of a spray drying process was evaluated in different encapsulation systems (extract, chitosan-coated and uncoated… Click to show full abstract

Abstract The degradation of black carrot anthocyanins (BCE) under stress conditions as under the effect of a spray drying process was evaluated in different encapsulation systems (extract, chitosan-coated and uncoated liposomes and chitosan-extract-mixture). The encapsulation efficiencies of liposomes prepared by high-pressure homogenization containing 2% lecithin with 0.1%, 0.2%, and 0.4% extract were found as 86.6% ± 16.1%, 82.2% ± 9.7%, and 46.9% ± 6.3%, respectively. The extract-loaded liposomes (0.2% extract) were chosen for liposomes considering further dilutions. The chitosan-coated liposomes were generated with 0.1% chitosan according to their particle size (82.7 ± 1.5 nm) and zeta potential of 51.4 ± 0.6 mV. All samples were found to be physically stable after the spray drying process. In addition, SEM images of the liposomal powder particles showed a uniformly wrinkled surface that would indicate stability of liposomal systems against spray drying. However, the liposomal samples showed lower stability compared to the BCE and BCE-chitosan mixtures according to the biochemical analysis of the reconstituted powders.

Keywords: coated uncoated; uncoated liposomes; black carrot; spray drying; spray

Journal Title: Journal of Food Engineering
Year Published: 2019

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