Enhancing carrot convective drying by combining ethanol and ultrasound as pre-treatments: Effect on product structure, quality, energy consumption, drying and rehydration kinetics
Costa Santos, Karoline
Souza Guedes, Jaqueline
Lindsay Rojas, Meliza
Reis Carvalho, Gisandro
Duarte Augusto, Pedro Esteves
MetadataShow full item record
ABSTRACT Ultrasound was combined with ethanol to improve different aspects of carrot convective drying, evaluating both processing and product quality. The ultrasound in water treatment resulted in cellular swelling and small impact on texture. Differently, the ultrasound in ethanol and ethanol treatments modified both carrot microstructure (cell wall modifications of parenchymatic tissue) and macrostructure (shrinkage and resistance to perforation). Pre-treatments with ultrasound in ethanol and ethanol improved the drying kinetics, reducing the processing time (~50%) and the energy consumption (42–62%). These pre-treatments also enhanced rehydration, whose initial rate and water retention were higher than the control. In addition, the carotenoid content was preserved after drying, for all the treatments. Any impact on shrinkage was observed. A mechanistic discussion, based on structural modification (microstructure and macrostructure) and physical properties of water and ethanol, was provided. As conclusion, this work not only described positive aspects of combining the technologies of ultrasound and ethanol as pre-treatments to convective drying, but also proposed mechanisms to explain the phenomena.Mostrar más
Costas, K. ...[et al.]. (2021). Enhancing carrot convective drying by combining ethanol and ultrasound as pre-treatments: Effect on product structure, quality, energy consumption, drying and rehydration kinetics. Ultrasonics - Sonochemistry, 70(105304). https://doi.org/10.1016/j.ultsonch.2020.105304
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Drying Accelerators to Enhance Processing and Properties: Ethanol, Isopropanol, Acetone and Acetic Acid as Pre-treatments to Convective Drying of Pumpkin Carvalho, Gisandro Reis; Rojas, Meliza Lindsay; Silveira, Isabela; Duarte Augusto, Pedro Esteves (Springer, 2020-10-13)Acceso abiertoABSTRACT Different drying accelerators were studied to improve vegetable drying: acetone (AC), ethanol (ET), isopropanol (ISO) and acetic acid (AA). Pre-treatments were performed by immersion of pumpkin cylinders. Convective ...
Combinación de tecnologías de ultrasonido y flujo Marangoni en el proceso de secado de corazón de piña y el mecanismo de interacción de su estructura Saavedra Davila, Juan Ernesto (Universidad Privada del Norte, 2022-07-23)Acceso abiertoEste estudio tuvo como objetivo evaluar la aplicación de tecnologías de ultrasonido y/o etanol antes del secado convectivo en muestras con una estructura vascular particular (núcleo de piña). Los corazones de piña se ...
Pre-treatments applied to rice husk enzymatic hydrolysis: effect on structure, lignocellulosic components, and glucose production kinetics Aredo, Fernando; Rojas, Meliza Lindsay; Pagador, Sandra; Lescano, Leslie; Sanchez Gonzalez, Jesús; Linares, Guillermo (LACCEI, 2020-09-15)Acceso abiertoABSTRACT Freezing (-20 °C, 12h) and alkaline (NaOH 8%) pretreatments were applied individually and combined in rice husk (Oryza sativa L.) before their hydrolysis with cellulase (EC: 184.108.40.206.). The effects on structural ...