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Dynamic surface properties of the proteose-peptone fraction of bovine milk
Innocente, N.; Corradini, C.; Blecker, Christophe et al.
1998In Journal of Dairy Science, 81 (7), p. 1833-1839
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Abstract :
[en] Proteose-peptone is a heat-stable and acid-soluble protein fraction of milk that has important functional properties. Component 3, which is the most hydrophobic fraction, appears to be largely responsible for the physicochemical properties of proteose-peptones and for their important biological role in milk. In this study, total proteose-peptone was prepared from bulk skim milk by precipitation with ammonium sulfate, and the hydrophobic fraction was purified by FPLC(R) (Pharmacia Fine Chemicals, Uppsala, Sweden). The drop volume method was used to investigate the dynamic surface activity of total proteose-peptone and component 3 of proteose-peptone at the air-water interface and at the oil-water interface. In general, proteose-peptones are good surfactants at both interfaces. Of all proteose-peptones, component 3 causes a more rapid reduction of interfacial tension in both interfaces. A system for measuring film balance was used to obtain more information about the surface and mechanical properties of proteose-peptone monolayers. We deduced from the compression isotherms that component 3 of proteose-peptone and total proteose-peptone films spread at the air-water interface present different mechanical properties.
Disciplines :
Agriculture & agronomy
Author, co-author :
Innocente, N.
Corradini, C.
Blecker, Christophe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Paquot, Michel ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Language :
English
Title :
Dynamic surface properties of the proteose-peptone fraction of bovine milk
Publication date :
1998
Journal title :
Journal of Dairy Science
ISSN :
0022-0302
eISSN :
1525-3198
Publisher :
American Dairy Science Association, Champaign, United States - Illinois
Volume :
81
Issue :
7
Pages :
1833-1839
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 May 2010

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