Title
Effect of modified celluloses on dough rheology and microstructure
Date Issued
01 April 2010
Access level
metadata only access
Resource Type
journal article
Author(s)
Universidad Nacional de La Plata
Abstract
The effect of different modified celluloses on dough microstructure and rheological characteristics was studied. Microcrystalline cellulose (MCC), carboxymethylcellulose (CMC) and two different types of hydroxypropylmethylcellulose (HPMC F4M and HPMC F50) were tested in a range of concentration from 0.25% to 1.5% (flour basis). Doughs were formulated without and with salt (2%w/w flour basis). Farinographic water absorption increased when hydrocolloids were incorporated and the highest values were obtained in mixtures without NaCl and when HPMCs were added. A linear relationship between the percentage increment in water absorption and the hydrocolloid level was observed within the assayed range of concentrations. The development time was markedly increased when CMC was added. CMC and HPMC did affect or not dough stability depending on the presence or absence of salt whereas the stability was not modified by MCC. Texture attributes and the rheometric parameter tan δ were analyzed through Principal Component Analysis (PCA). Two factors described the 88.9% of total variation, one of them composed by hardness, consistency, adhesiveness and tan δ and the other composed by resilience and cohesiveness. Hydrocolloids addition softened the dough, particularly when salt was absent. Samples with salt and with hydrocolloids exhibited more cohesive and less resilient characteristics. Rheological results were in agreement with the characteristics of gluten network studied by SEM since a diminished stability and softer dough could be associated with a more disrupted matrix. © 2009 Elsevier Ltd. All rights reserved.
Start page
780
End page
787
Volume
43
Issue
3
Language
English
OCDE Knowledge area
Química orgánica
Alimentos y bebidas
Subjects
Scopus EID
2-s2.0-76349095777
Source
Food Research International
ISSN of the container
09639969
Sponsor(s)
Authors want to acknowledge FONCYT, CONICET and Universidad Nacional de La Plata (Argentina) for the financial support and to Dow Chemical Co. and Latinoquímica Amtex (Argentina) for gums donation.
Sources of information:
Directorio de Producción Científica
Scopus