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Effect of Alkali Dipping on Dough and Final Product Quality.

Ni, Y, Owusu-Apenten, Richard, Zhu, L and Seetharaman, Koushik (2006) Effect of Alkali Dipping on Dough and Final Product Quality. Journal of Food Science, 71 (3). C209-C215. [Journal article]

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The effects of alkali dipping on starch, protein, and color changes in hard pretzel products have never been researched. Experiments were conducted to mimic reactions occurring on the pretzel dough surface. Dough was dipped in water or 1% sodium hydroxide solution at different temperatures between 50 degrees C and 80 degrees C. Protein and starch profile after dipping were analyzed. Color development on pretzel surface following the extraction of pigments from flour was investigated. Whole dough and pretzel samples were also made at pilot plant and the properties were analyzed. Only starch granules on the dough surface were gelatinized following dipping. Amylose-lipid complex dissociated at a lower temperature with alkali treatment but were not dissociated, even at high-temperature dipping in water. Treating the dough at 80 degrees C in alkali solution resulted in the hydrolysis of proteins into smaller peptides that could be not precipitated by trichloroacetic acid (TCA). Dough surface color was different following pigment extraction from flour but not significantly different following baking. The results suggest that the color that developed on pretzel surface was not due to pigments present in the flour but was contributed by the reaction within or between the starch and protein hydrolysis derivatives during baking.

Item Type:Journal article
Keywords:sodium hydroxide; alkali; dough; pretzel; pigment; baking, WHEAT-FLOUR; STARCH; CORN; PROTEINS; TORTILLA; COLOR; BEET
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Nutrition Innovation Centre for Food and Health (NICHE)
ID Code:14956
Deposited By: Dr Richard Owusu-Apenten
Deposited On:17 Aug 2010 10:27
Last Modified:28 Jan 2014 14:46

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