Abstract
There has been an increasing interest in developing protein-enriched cereal products of recent. The quality of these products will depend on interactions between proteins and starch presented in the flours. The present study aimed to study the influence of the substitution of maize flour by 25 or 50% of proteins (potato, rice, pea or hydrolyzed gluten). Hydration, pasting, thermal, rheological and textural properties of the flour and mixtures were analyzed. Hydration properties were enhanced by the presence of rice or pea proteins, being the increase more evident when higher the protein content. All flour–protein samples modified pasting profiles, decreasing overall viscosity but increasing gelatinization temperature. Among the different flour–protein samples, those with pea protein presented higher values for hydration, pasting, and rheological parameters. Mixtures with hydrolyzed gluten protein presented the lowest values for both viscoelastic moduli and hardness. Mixtures with potato protein presented the lowest values for hydration properties, but gave the highest hardness among flour–protein gels.
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Acknowledgements
The authors acknowledge the financial support of the Spanish Ministry of Economy and Competitiveness (Project AGL2014-52928-C2-2-R) and the European Regional Development Fund (FEDER). Ángela Bravo-Núñez would like to acknowledge the University of Valladolid for her pre-doctoral scholarship.
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Bravo-Núñez, Á., Gómez, M. Assessing the influence of vegetal protein source on the physicochemical properties of maize flour. Food Measure 13, 3340–3348 (2019). https://doi.org/10.1007/s11694-019-00256-8
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DOI: https://doi.org/10.1007/s11694-019-00256-8