A weak gel model for foods View Full Text


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Article Info

DATE

2001-03

AUTHORS

Domenico Gabriele, Bruno de Cindio, Paolo D'Antona

ABSTRACT

From a general point of view food can be seen as either a continuous aqueous or lipidic phase in which other components are dispersed (for example long fibres, droplets). While these systems seem to be very different one from the other, they generally show similar behaviour due to the presence of a supramolecular structure, comprised of ordered or interacting droplets, particles etc. that determine these characteristics. Many food systems can be treated as gels, characterised by a three-dimensional network where weak interactions (like Wan der Waals interactions or hydrogen bonding) ensure the stability of the structure. The gel is assumed to coincide with the critical gel of Winter's theory, but a finite relaxation time is assumed to account for the flowing character of foods, that is interpreted in terms of theory of cooperative flow. Thus, apart from the usual two continuum material function, i.e. a truncated relaxation spectrum and an apparent elastic modulus, other two material parameters were determined and proposed to describe the network extension and its strength. This kind of approach, named weak gel model, was applied to different foods such as jams, dough and yoghurt and it proved to be quite adherent to food reality. More... »

PAGES

120-127

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s003970000139

DOI

http://dx.doi.org/10.1007/s003970000139

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1002167334


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