Investigation into the impact of egg white addition on the structural properties and flavour profile of gluten-free sourdough bread
Publication Date
April 12, 2024
Description
The impact of egg white addition on structural and sensory qualities of gluten-free sourdough bread was investigated at three egg white-to-sourdough ratios: 25:75, 45:55, and 85:15, versus a sourdough-only control (0:100) In this study, mild acidity from sourdough promoted gluten-like network formation in egg white-added breads, evidenced by significantly thicker cell walls versus control (p<0.05), with the greatest improvement in samples with 45 % egg white and 55 % sourdough. Specific volume and textural parameters of breads with 45-85 % egg white were significantly improved versus control (p<0.05). Principal Component Analysis showed positive multivariate correlations between egg white content and improved chewiness, area of cells and density. Positive correlations were identified between sourdough content and favourable acetic acid, phenylethyl alcohol and 6-methyl-5-heptan-2-one, and samples with egg white-to-sourdough ratios 45:55 contained positive flavour attributes throughout storage, with the greatest concentrations of acetic acid and phenylethyl alcohol by day six. This research demonstrated that the combination of egg white and sourdough in similar proportions promotes the formation of gluten-like networks, producing gluten-free breads with similar structural and sensory attributes to conventional breads, which are retained over storage.
Associate publ. DOI
Subjects
Subjects (JACS)
Subjects (LC)
Divisions
University of Nottingham, UK Campus::Faculty of Science::School of Biosciences
Data type
numerical and statistical data
Grant Number
BB/W006979/1
Data collection method
Analytical methods of batter and loaf characteristics, texture analyser, C-Cell, GC-MS, ANOVA, Kruskal-Wallis tests, Principal Component Analysis (PCA)
Resource languages
English
Publisher
University of Nottingham
Date Issued
April 12, 2024
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Investigation into the impact of egg white addition on the structural properties and flavour profile of gluten-free sourdough bread.xlsx
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Experiment data reading
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631.72 KB
Format
Microsoft Excel XML
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