Article (Scientific journals)
Interactions between bacterial surfaces and milk proteins, impact on food emulsions stability
Ly, M. H.; Aguedo, Mario; Goudot, S. et al.
2008In Food Hydrocolloids, 22 (5), p. 742-751
Peer Reviewed verified by ORBi
 

Files


Full Text
Food Hydrocolloids 2008 (Ly).pdf
Publisher postprint (665.04 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Emulsion stability; Lactic acid bacteria; Proteins; Surface charge (zeta potential); Bacteria (microorganisms)
Abstract :
[en] Bacteria possess physicochemical surface properties such as hydrophobicity, Lewis acid/base and charge which are involved in physicochemical interactions between cells and interfaces. Moreover, food matrices are complex and heterogeneous media, with a microstructure depending on interactions between the components in media (van der Waals, electrostatic or structural forces, etc.). Despite the presence of bacteria in fermented products, few works have investigated how bacteria interact with other food components. The objective of the present study was to determine the effects of the surface properties of lactic acid bacteria on the stability of model food emulsions. The bacteria were added to oil/water emulsions stabilized by milk proteins (sodium caseinate, whey proteins concentrate or whey proteins isolate) at different pH (from 3 to 7.5). The effect of bacteria on the emulsions stability depended on the surface properties of strains and also on the characteristics of emulsions. Flocculation and aggregation phenomena were observed in emulsion at pHs for which the bacterial surface charge was opposed to the one of the proteins. The effects of bacteria on the stability of emulsion depended also on the concentration of cations present in media such as Ca2+. These results show that the bacteria through their surface properties could interact with other compounds in matrices, consequently affecting the stability of emulsions. The knowledge and choice of bacteria depending on their surface properties could be one of the important factors to control the stability of matrices such as fermentation media or fermented products. © 2007 Elsevier Ltd. All rights reserved.
Disciplines :
Food science
Author, co-author :
Ly, M. H.;  Laboratoire de Microbiologie, UMR Université de Bourgogne/INRA1232, IFR 92, Esplanade Erasme, 21000 Dijon, France
Aguedo, Mario ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Goudot, S.;  Laboratoire de Microbiologie, UMR Université de Bourgogne/INRA1232, IFR 92, Esplanade Erasme, 21000 Dijon, France
Le, M. L.;  Laboratoire de Microbiologie, UMR Université de Bourgogne/INRA1232, IFR 92, Esplanade Erasme, 21000 Dijon, France
Cayot, P.;  Equipe IMSAPS, Université de Bourgogne, ENSBANA, 1 Esplanade Erasme, 21000 Dijon, France
Teixeira, J. A.;  Departamento de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
Le, T.M.
Belin, J.-M.;  Laboratoire de Microbiologie, UMR Université de Bourgogne/INRA1232, IFR 92, Esplanade Erasme, 21000 Dijon, France
Waché, Y.;  Laboratoire de Microbiologie, UMR Université de Bourgogne/INRA1232, IFR 92, Esplanade Erasme, 21000 Dijon, France
Language :
English
Title :
Interactions between bacterial surfaces and milk proteins, impact on food emulsions stability
Publication date :
2008
Journal title :
Food Hydrocolloids
ISSN :
0268-005X
eISSN :
1873-7137
Publisher :
Elsevier, Netherlands
Volume :
22
Issue :
5
Pages :
742-751
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 February 2014

Statistics


Number of views
47 (1 by ULiège)
Number of downloads
629 (0 by ULiège)

Scopus citations®
 
66
Scopus citations®
without self-citations
61
OpenCitations
 
53

Bibliography


Similar publications



Contact ORBi