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Título
Microwave modification of quinoa grains at constant and varying water content modulates changes in structural and physico-chemical properties of the resulting flours
Autor
Año del Documento
2023
Editorial
MDPI
Descripción
Producción Científica
Documento Fuente
Foods, 2023, vol. 12, n. 7, 1421
Abstract
Microwave-assisted heat moisture treatment (MWT) was applied to quinoa grains, a nutritious gluten-free pseudocereal of great interest in food product development, to achieve the physical modification of the quinoa flour. The effect of treating quinoa grains at different initial water contents (WC; 10%, 20%, and 30%) in two operational systems was compared: one open at atmospheric pressure and variable WC (V system), and the other in hermetic containers at constant WC (C system). The morphological structure of the obtained flours and their techno-functional, rheological, and thermal properties were evaluated. MWT proved to be effective in modifying these properties, the main effects probably being caused by protein denaturation and aggregation, and intragranular molecular rearrangements of starch, with disruption of short-range molecular order and even the partial collapse of starch granules in the samples treated at the highest WC. The greatest differences were observed for the 20 and 30% WC treated-samples, particularly when using C system, which increased their water absorption capacity and decreased their foaming, emulsion, and gel-forming capacities. Based on these results, the control of WC and its evolution during MWT of quinoa grains appears to be a viable and effective approach to adapt flour functionality to the needs of food production, allowing a wider range of flour properties depending on the MWT conditions.
Materias Unesco
3309 Tecnología de Los Alimentos
3309.11 Fabricación de Harina
Palabras Clave
Quinoa
Heat moisture treatment
Microwave treatment
Techno-functional properties
Thermal properties
ISSN
2304-8158
Revisión por pares
SI
Patrocinador
Ministerio de Ciencia e Innovación (PID2019- 110809RB-I00/AEI/10.1303/501100011033)
Junta de Castilla y León/FEDER (VA195P20)
Junta de Castilla y León/FEDER (VA195P20)
Version del Editor
Propietario de los Derechos
© 2023 The Authors
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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