Artículo
Thermal degradation kinetics of monomeric anthocyanins, colour changes and storage effect in elderberry juices
Busso Casati, Carolina Ines; Baeza, Rosa Isabel
; Sanchez, Virginia; Catalano, Alejandra Vanina; López, Paula Gladys; Zamora, María Clara
Fecha de publicación:
03/2015
Editorial:
IOS Press
Revista:
Journal of Berry Research
ISSN:
1878-5093
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
BACKGROUND: Elderberry (Sambucus nigra L.) is considered an interesting fruit as food ingredient, due to its high content of anthocyanins that give products an attractive red colour. OBJECTIVE: The aim of present study was to evaluate the kinetics of elderberry monomeric anthocyanin (MAcy) and colour degradation due to thermal processing and storage. METHODS: Anthocyanins content was measured with pH-differential method. CIELab parameters were obtained with a Minolta Spectrophotometer, total phenolics were determined by Folin-Ciocalteu method. MAcy degradation and evolution of colour parameter a∗ were fitted to a first–order model. RESULTS: The degradation rate of a∗ was about three times lower than MAcy degradation rate. Activation energy for degradation of a∗ and MAcy were 140.6 and 144.6 kJ mol−1 respectively. Degradation rates (k) obtained during storage were 0.025 d−1 for MAcy and 0.0064 d−1 for a∗. During storage, 50% reduction of initial values was at 120 days for MAcy and at 432 days for colour parameter a∗ at 25ºC. However, a high retention of polyphenols and antioxidant was noted. CONCLUSIONS: Kinetic parameters calculated for elderberry juice can be used to design a thermal treatment to obtain a high retention of colour and bioactive compounds.
Palabras clave:
Anthocyanins
,
Colour
,
Kinetics
,
Polyphenols
,
Thermal Procsesing
,
Antioxidant
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Identificadores
Colecciones
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Busso Casati, Carolina Ines; Baeza, Rosa Isabel; Sanchez, Virginia; Catalano, Alejandra Vanina; López, Paula Gladys; et al.; Thermal degradation kinetics of monomeric anthocyanins, colour changes and storage effect in elderberry juices; IOS Press; Journal of Berry Research; 5; 3-2015; 29-39
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