Egg yolk: structures, functionalities and processes - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Journal of the Science of Food and Agriculture Année : 2013

Egg yolk: structures, functionalities and processes

Résumé

Hen egg yolk is an ideal example of natural supramolecular assemblies of lipids and proteins with different organization levels. These assemblies are mainly due to interactions between proteins and phospholipids, and these interactions are essential in understanding and controlling the production of food made with yolk, and particularly emulsions. Furthermore, these assemblies can be modulated by external constraints among which thermo-mechanical and high-pressure treatments. This review focuses on multi-scale structures present in egg yolk, and their modulation by processes, in relation with their emulsifying properties. Egg yolk is mainly composed of two fractionsplasma and granuleswhich are natural nano- and micro-assemblies. These two fractions possess different composition, structures and functionalities and exhibit specific behaviour under treatments such as high pressure and temperature. Plasma contains a large quantity of lipids structured as lipoproteins (low-density lipoproteins), whereas granules are mainly composed of proteins aggregated in micrometric assemblies. If plasma is responsible for the important emulsifying properties of yolk, granules bring interesting emulsifying properties when assemblies are in the form of micelles in presence of salts. High-pressure or thermal treatments, applied before or after emulsion fabrication, alter their functionalities and could be used to commercially exploit these fractions. (c) 2013 Society of Chemical Industry

Dates et versions

hal-02651340 , version 1 (29-05-2020)

Identifiants

Citer

Marc Anton. Egg yolk: structures, functionalities and processes. Journal of the Science of Food and Agriculture, 2013, 93 (12), pp.2871 - 2880. ⟨10.1002/jsfa.6247⟩. ⟨hal-02651340⟩

Collections

INRA INRAE
31 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More