Studies on glass transition and starch re-crystallization in wheat bread during staling using electrical impedance spectroscopy

Bhatt, Chintan M and Nagaraju, J (2009) Studies on glass transition and starch re-crystallization in wheat bread during staling using electrical impedance spectroscopy. In: Innovative Food Science & Emerging Technologies, 10 (2). pp. 241-245.

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Abstract

Bread staling is a very complex phenomenon that is not yet completely understood. The present work explains how the electrical impedance spectroscopy technique can be utilized to investigate the effect of staling on the physicochemical properties of wheat bread during storage. An instrument based on electrical impedance spectroscopy technique is developed to study the electrical properties of wheat bread both at its crumb and crust with the help of designed multi-channel ring electrodes. Electrical impedance behavior, mainly capacitance and resistance, of wheat bread at crust and crumb during storage (up to 120 h) is investigated. The variation in capacitance showed the glass transition phenomenon at room temperature in bread crust after 96 h of storage with 18% of moisture in it. The resistance changes at bread crumb showed the starch recrystallization during staling.

Item Type:	Journal Article
Publication:	Innovative Food Science & Emerging Technologies
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Bread staling;Impedance spectroscopy;Glass transition temperature(Tg);Starch re-crystallization;Capacitance; Resistance
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	10 Dec 2009 11:08
Last Modified:	19 Sep 2010 05:30
URI:	http://eprints.iisc.ac.in/id/eprint/19744

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