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Studies on heat stabilized wheat germ and its influence on rheological characteristics of dough

Alok, K. Srivastava and Sudha, M. L. and Baskaran, V. and Leelavathi, K. (2007) Studies on heat stabilized wheat germ and its influence on rheological characteristics of dough. European Food Research and Technology, 224. pp. 365-372.

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Abstract

Wheat germ, a nutrient dense by-product has a very poor shelf life. In order to improve its keeping quality, so that it can be used into different products, various heat treatments were tried and studied to investigate their influence on proximate composition as well as on the rheological characteristics of wheat flour dough. Different heat treatments have shown insignificant effect on proximate composition of wheat germ. Retention of vitamin E was greater in steamed and dried germ. Except for fluidized bed dried germ, all the heat treatments employed completely inactivated the lipase enzyme, whereas the lipoxygenase enzyme was inactivated to an extent of 80–92%. Quality evaluation of germ samples during 60 days storage indicated that steamed and dried germ retained the sensory attributes to a greater extent. Rheological study of wheat flour blends with germ upto 20%, showedmarginal increase inwater absorption and over-pressure values. However incorporation of treated wheat germ caused dough weakening in terms of reduction in dough stability and rupture at abscissa values.

Item Type: Article
Uncontrolled Keywords: Wheat germ . Stabilization . Enzymes and rheological characteristics
Subjects: 600 Technology > 08 Food technology > 14 Physical properties > 03 Rheology
600 Technology > 08 Food technology > 16 Nutritive value > 05 Enzymes
600 Technology > 08 Food technology > 21 Cereals > 04 Wheat
Divisions: Protein Chemistry and Technology
Flour Milling Bakery and Confectionary Technology
Dept. of Biochemistry
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 26 Jun 2009 06:40
Last Modified: 28 Dec 2011 10:10
URI: http://ir.cftri.com/id/eprint/9120

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