Influence of the food matrix structure on the retention of aroma compounds.
The retention of the aroma compounds in a multicomponent medium like the food matrix is influenced by their affinity with the protein when lipid is present at a low level (0.5%). The effect of the structure of the media is also studied by using two media with the same composition; one was emusified, and the other was not. Among the studied aroma compounds, 2-nonanone and isoamyl acetate present opposite behaviors: the volatility of isoamyl acetate is not affected by the change of the medium structure whereas that of 2-nonanone increases. The decrease of retention of 2-nonanone in an emulsified system would be due to a modification of the fixation site for this compound on the protein or to a competition between the lipid and the aroma compound while the protein is adsorbed at the lipid-water interface.
Seuvre
A M
AM
Laboratoire de Génie des Procédés Alimentaires et Biotechnologiques, ENSBANA, Université de Bourgogne, 1 Esplanade Erasme, 21000 Dijon, France.
Díaz
M A
MA
Voilley
A
A
D005502:Food; D007782:Lactoglobulins / Q000737:chemistry; D008055:Lipids / Q000737:chemistry; D009812:Odorants
D007782:Lactoglobulins; D008055:Lipids