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Research article - Peer-reviewed, 2013

Long-term frozen storage of wheat bread and dough - Effect of time, temperature and fibre on sensory quality, microstructure and state of water

Eckardt, J.; Öhgren, Camilla; Alp, A.; Ekman, Susanne; Åström, Annika; Chen, G.; Swenson, Jan; Johansson, Daniel; Langton, Maud;

Abstract

The objective of this study was to determine effect of storage time, storage temperature and addition of fibre on sensory quality, state of water, microstructure and texture of bread and dough. Samples with and without fibre, were stored frozen for 2, 3.5 and 6 months at temperatures of 19, 16 and 8 C as dough and bread. Sensory quality was evaluated by a trained analytical panel. Microstructure was analysed by light microscopy. Texture measurements were performed on bread, and the state of water was measured by differential scanning calorimetry. Bread without fibre stored as dough at 19 C was the sample most like freshly baked bread. Sensory evaluation also confirmed that quality of the final bread was improved if samples were stored as dough compared to stored as bread. The microstructure had larger gaps between the starch and gluten phases when stored at warmer temperatures, due to retrogradation of starch, dehydration of gluten and water migration. DSC measurements showed that bread stored at 19 C gained extra amount of freezable water, but lost ice after storage at 8 C. Texture measurements showed that firmness increased with extended storage time. Bread stored at 8 C had lowest quality in all measurements.

Keywords

Bread; Ice formation; Frozen storage; Temperature

Published in

Journal of Cereal Science

2013, volume: 57, number: 1, pages: 125-133
Publisher: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

Authors' information

Eckardt, J.
Öhgren, Camilla
Alp, A.
Ekman, Susanne
Åström, Annika
Chen, G.
Chalmers University of Technology
Swenson, Jan
Johansson, Daniel
Swedish University of Agricultural Sciences, Department of Food Science
Johansson, Daniel
Swedish Institute for Food and Biotechnology - SIK
Swedish University of Agricultural Sciences, Department of Food Science
Swedish Institute for Food and Biotechnology - SIK

UKÄ Subject classification

Food Science
Condensed Matter Physics

Publication Identifiers

DOI: https://doi.org/10.1016/j.jcs.2012.10.007

URI (permanent link to this page)

https://res.slu.se/id/publ/55589