Impact of oleuropein on rheology and breadmaking performance of wheat doughs,and functional features of bread |
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Authors: | Niccolò Renoldi Paolo Lucci Donatella Peressini |
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Affiliation: | 1. Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/A, Udine, 33100 Italy;2. Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/A, Udine, 33100 Italy Contribution: Conceptualization (supporting), Methodology (equal), Resources (supporting), Writing - review & editing (supporting) |
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Abstract: | Oleuropein (OP) is a polyphenol present in drupes and leaves of olive tree with health benefits and, as antioxidant, potentiality to alter gluten functionality. Effects of OP inclusion to wheat flour (0.01% and 0.02% on flour weight basis) on dough rheology and breadmaking performance, and bread features were investigated. Farinograph, uniaxial extension and shear rheometry (oscillatory and creep-recovery) were applied. Doughs containing OP were stronger, more elastic, and less sticky indicating the ability of OP to act as flour improver. The strengthening effect of OP on gluten led to the increase in bread volume and softer crumb compared to control. A lower crumb density of bread with the addition of OP was related to a higher in vitro glycaemic response. An increase in the antioxidant capacity of bread made with the phenolic compound was also found. |
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Keywords: | Antioxidant dough flour improver rheology starch digestion |
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