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Mechanical contribution of starch granules in the stabilization/destabilization of cell walls during bread baking

Project description

How starch granules affect the structure of bread

Supplies of bread-quality wheat are being threatened by climate change, while consumers are becoming more critical of the use of food additives. Obtaining breads with similar performance requires a precise understanding of the role played by flour ingredients other than gluten in breadmaking, especially starches which comprise about 80 % of the wheat flour. The EU-funded MECASTARCH project will use computer models to decouple the multiple roles played by starch in the stabilisation/destabilisation of gas cell wall (GCW) during baking and focus on the mechanical contribution of starch. Different approaches will be used to select starches for computer modelling, including rheometry on moderately hydrated starch, study of starch/gluten interactions by atomic force microscopy, and morphometric observations of GCW by sophisticated microscopy.

Objective

Wheat-based bread is a staple food in the European and North American diet, presenting a relevant economic importance. Early successes in the wheat selection (high in gluten) along with the use of additives (surfactants, supplementation in gluten) to smooth out the variability in batch-to-batch performance of wheat flours reduced the incentive to carry out in-depth characterization of the roles played by other flour ingredients in the inflation process during bread baking. However, supplies of bread-quality wheat are being threatened by climate-induced variability, while consumers are more critical regarding the use of food additives and more demanding of clean-label products. In this scenario, the bakery industry will demand a transformation and alternatives such as flour blending will become a hot topic. In order to obtain breads with similar performance, it is crucial to understand the exact role played by flour ingredients other than gluten in breadmaking, especially starches (~80% of the wheat flour). In this context, the MECASTARCH project proposes a cutting-edge approach of computer modelling offering the possibility to decouple the multiple roles played by starch in the stabilization/destabilization of Gas Cell Wall (GCW) during baking and focusing on the mechanical contribution of starch. Several experimental approaches applied to a selection of starches will feed this computer modelling, including rheometry on moderately hydrated starch, starch/gluten interactions by AFM, and morphometric observations of GCW by sophisticated microscopy. On the one hand, the fellow will share her large experience in the characterization and evaluation of starches with the host. On the other hand, the host will contribute to develop her scientific skills related to material science, as well as her management skills. The project will deeply contribute to the career development of the fellow who aims at promoting a holistic approach from her background science in a near future

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Coordinator

INSTITUT NATIONAL DE RECHERCHE POUR L'AGRICULTURE, L'ALIMENTATION ET L'ENVIRONNEMENT
Net EU contribution
€ 184 707,84
Address
147 rue de l'universite
75007 Paris
France

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Region
Ile-de-France Ile-de-France Paris
Activity type
Research Organisations
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Other funding
€ 0,00