Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 363144
Title Enhancement of foam stability of fibrillar protein assemblies
Author(s) Schaink, H.M.; Groot-Mostert, A.E.A. de; Sagis, L.M.C.; Linden, E. van der
Event 6th Liquid Matter Conference, 2005-07-02/2005-07-06
Department(s) Physics and Physical Chemistry of Foods
VLAG
Publication type Poster (professional)
Publication year 2007
Abstract Experiments are presented that show that the foaming ability of whey protein solutions is enhanced when the whey proteins have assembled into (sub)micron sized fibrillar aggregates. These fibrillar protein aggregates are made by subjecting the proteins, dissolved in a solution of pH=2, to a thermal denaturation step. For samples containing fibrillar aggregates the characteristic decay time of the foam layer is found to be roughly two hours, which is twice as long as the decay time obtained when native whey proteins are used at equal protein concentration. The protein concentrations considered in the foam experiments vary between 0.005% (w/w) and 1% (w/w). The increased stability is attributed to an experimentally observed increase of the surface elastic modulus and the surface dilational viscosity of the water-air interface. These moduli exhibit a concentration dependence similar to that of the foam stability.
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