Effect of freezing rate and storage on the rheological, thermal and structural properties of frozen wheat dough starch

María Irene Silvas-García, Benjamín Ramírez-Wong*, Patricia Isabel Torres-Chávez, Luis Arturo Bello-Pérez, Elizabeth Carvajal-Millán, Jesús Manuel Barrón-Hoyos, Mario Enrique Rodríguez-García, Francisco Vázquez-Lara, Armando Quintero-Ramos

*Autor correspondiente de este trabajo

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

24 Citas (Scopus)

Resumen

The aim of this study was to evaluate the effects of freezing rate and storage time on the properties of frozen wheat dough starch. The dough was frozen at either slow (−0.14°C/min) or fast (−1.75°C/min) rates and stored at −20°C for 8 weeks. Every 2 weeks, the frozen dough was sampled and freeze-dried. Analyses of the dried dough included damaged starch, paste properties, and thermal, morphological, and structural properties. Damaged starch increased significantly during storage, and it was higher in the dough frozen at a slow rate than in the dough frozen at a fast rate. The peak viscosity during storage gradually but significantly decreased. During this period, the peak viscosity was higher for the dough frozen at a slow rate than the dough frozen at a fast rate. The enthalpy of starch crystallite fusion gradually but significantly increased during storage, and it was lower in the dough frozen at a slow rate than in the dough frozen at a fast rate. The structural properties show a decrease in the crystalline percent as a result of the freezing and storage time. SEM images show that starch granules were separated from the gluten matrix after storage, and separation was greater for the dough frozen at a fast rate than that frozen at a slow rate. The freezing rate and storage time increased starch damage and changed the microstructure of the dough.

Idioma originalInglés
Páginas (desde-hasta)1103-1110
Número de páginas8
PublicaciónStarch/Staerke
Volumen68
N.º11-12
DOI
EstadoPublicada - 1 nov. 2016

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© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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