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http://hdl.handle.net/20.500.12390/2890


Título: Combining ethanol pre-treatment and ultrasound-assisted drying to enhance apple chips by fortification with black carrot anthocyanin
Autor(es): Rojas, Meliza Lindsay 
Augusto, Pedro Esteves Duarte 
Carcel, Juan Andres 
Resumen: BACKGROUND An interesting approach to improve dried foods nutritional properties, functionality, and sensorial attributes, is by taking advantage of pre-treatments for incorporating components into the food matrix. Based on this, this work studied the incorporation of black carrot anthocyanins in apple tissue by using ethanol (concentrations 0-300 mL L-1) as a pre-treatment to ultrasound-assisted convective drying. Samples were pre-treated in acidified ethanol solutions, with and without anthocyanins, and then dried (50 degrees C, 1 m s(-1)) by convective and ultrasound-assisted convective (21.77 kHz, 20.5 kW m(-3)) drying. Both the drying process improvement and the obtained product properties were studied. RESULTS The anthocyanins did not influence the drying kinetics. In contrast, time reduction was > 50% by using both ethanol pre-treatments and ultrasound. Ethanol pre-treatments decreased the external resistance to mass transfer, while ultrasound decreased both internal and external resistances. The impregnation increased the anthocyanins (above 947%), which were retained after drying. Colour modifications after pre-treatments and after drying (L*,b*,h degrees decrease, anda* increase), and antioxidant capacity retention were observed in samples with anthocyanin addition. CONCLUSION The results point that ethanol pre-treatments and ultrasound application can accelerate drying, and through the natural colouring incorporation during pre-treatments, the nutritional properties of dried samples were better retained. (c) 2020 Society of Chemical Industry
Tema: Nutrition and Dietetics;Agronomy and Crop Science;Food Science;Biotechnology
Editorial: Wiley
Fecha de publicación: 2020
Publicado en: JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 
Financiamiento: N087-2016 
Tipo de publicación: info:eu-repo/semantics/article
Identificador Handle: http://hdl.handle.net/20.500.12390/2890
DOI: 10.1002/jsfa.10830
Nivel de acceso: info:eu-repo/semantics/closedAccess
Colección:2.1 Estudios de doctorado y postdoctorado

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marcado en 27-nov-2021

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