Artículo
Storage stability of anthocyanins in freeze-dried elderberry pulp using low proportions of encapsulating agents
Baeza, Rosa Isabel
; Sanchez, Virginia Estela; Salierno, Gabriel Leonardo
; Molinari, Fabricio Nicolás; López, Paula; Chirife, Jorge
Fecha de publicación:
07/2020
Editorial:
Sage Publications Ltd
Revista:
Food Science and Technology International
ISSN:
1082-0132
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Berry fruits are well recognized for health-promoting constituents due to their properties of free radical scavengers which confer antioxidant activity against cellular oxidation reactions. Elderberry fruit contains one of the highest levels of anthocyanins. The objective of this work was to evaluate the storage stability of total monomeric anthocyanins, cyanidin-3-glucoside (one of two major anthocyanins in elderberry), and color parameters in freeze-dried elderberry encapsulated with a low proportion of different carriers (Maltodextrin, Capsul™, Promitor ™, and κ-carrageenan). Encapsulated samples were stored at two different water activities (aw) 0.10–0.20 and 0.43 at 38 ℃ for 90 days and evaluated for the content of monomeric anthocyanins, cyanidin-3-glucoside, color parameters, and physical characteristics. Freeze-dried powders remained free-flowing during storage at 38 ℃ with aw 0.12–0.20, but agglomeration occurred at aw = 0.43. Total anthocyanins and color parameter a* (redness) remained unchanged during storage at the lower aw. Glass transition temperatures (Tg) were determined and mostly correlated with observed physical phenomena. The powders had a very high total monomeric anthocyanin contents as high as 13 mg/g (cyanidin-3-glucoside). The addition of encapsulants in low proportions allowed the researchers to obtain elderberry powders with a very high concentration of total monomeric anthocyanins. aw plays a key role in all stability parameters studied.
Palabras clave:
ANTHOCYANINS
,
COLOR
,
CYANIDIN-3-GLUCOSIDE
,
ELDERBERRY
,
GLASS TRANSITION
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Articulos(OCA CIUDAD UNIVERSITARIA)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Citación
Baeza, Rosa Isabel; Sanchez, Virginia Estela; Salierno, Gabriel Leonardo; Molinari, Fabricio Nicolás; López, Paula; et al.; Storage stability of anthocyanins in freeze-dried elderberry pulp using low proportions of encapsulating agents; Sage Publications Ltd; Food Science and Technology International; 27; 2; 7-2020; 135-144
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