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Título: Impact of acidification and protein fortification on rheological and thermal properties of wheat, corn, potato and tapioca starch-based gluten-free bread doughs
Autor: Villanueva Barrero, Marina
Pérez Quirce, Sandra
Collar, Concha
Ronda Balbás, Felicidad
Año del Documento: 2018
Editorial: Elsevier
Descripción: Producción Científica
Documento Fuente: LWT, Octubre 2018, vol. 96, 2018, p. 446-454
Resumen: The study of new gluten-free (GF) foods is necessary since consumers intolerant to gluten are more and more frequently diagnosed. The study evaluated the impact of acidification -with acetic+lactic blend at 0.5 g/100 g level- and protein fortification -with caseinate (CA) or soy-protein isolate (SPI)- on the rheological features of wheat, corn, potato and tapioca starch-based bread doughs. Oscillatory and creep-recovery tests were carried out to characterise their viscoelastic behaviour, and thermomechanical tests were performed to assess their visco-metric performance. Dough stickiness was also measured. The acid blend had a modulator effect on dough rheological properties that depended on both the type of protein and the source of the starch. Proteins structured and strengthened the doughs especially those made with SPI-potato starch and CA-wheat starch mixtures. Acidification decreased G’ and G’’ moduli until 70% with respect to unacidified doughs. The effect was much more marked in protein-fortified doughs. A significant increase in all pasting viscosities was observed with protein addition, particularly in the case of CA. In general, protein addition decreased dough stickiness whereas the opposite effect was noted with the presence of acid. Acidification of protein-enriched starch matrices modulate dough rheological properties which are of relevance in GF products development.
Palabras Clave: Acetic acid
Gluten-Free Doughs
Lactic acid
Proteins
Rheology
ISSN: 0023-6438
Revisión por Pares: SI
DOI: https://doi.org/10.1016/j.lwt.2018.05.069
Patrocinador: Ministerio de Economía y Competitividad - FEDER (AGL2015-63849-C2-1-R and AGL2015-63849-C2-2-R)
Junta de Castilla y León - FEDER (Project VA072P17)
Version del Editor: www.elsevier.com
Idioma: eng
URI: http://uvadoc.uva.es/handle/10324/32601
Derechos: info:eu-repo/semantics/openAccess
Aparece en las colecciones:DEP42 - Artículos de revista

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