Formulation of heat- and acid-induced milk gels – Effect on texture, microstructure, and water distribution

Anne Katrine Laursen, Tijs A.M. Rovers, Frans W.J. van den Berg, Lilia Ahrné*

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

7 Citationer (Scopus)
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Abstract

Full-fat milk was fortified with 0.5, 1, 1.5, or 2 % whey protein isolate (WPI) or micellar casein isolate (MCI). The effect of protein addition on composition, microstructure, and physicochemical properties of heat- and acid-induced milk gels was assessed. Lower moisture and higher calcium content was observed in gels with higher amount of MCI compared with WPI. Low-field nuclear magnetic resonance showed that the population with shorter relaxation, assigned to casein micelles and a more dense protein network, may explain the hardest texture of MCI gels. Contrarily, WPI rich gels showed longer relaxation times which is in agreement with a more open and porous microstructure. Increasing the casein content by 0.5 % formed gel significantly harder, while adding 2 % WPI produced more inhomogeneous gels but the texture was not significantly affected compared with native milk. Protein formulation of the milk can modulate the textural and water holding properties of heat- and acid-induced milk gels.

OriginalsprogEngelsk
Artikelnummer100341
TidsskriftFood Structure
Vol/bind37
Antal sider9
ISSN2213-3291
DOI
StatusUdgivet - 2023

Bibliografisk note

Funding Information:
This work was funded by the Danish Dairy Research Foundation and Arla Foods amba .

Publisher Copyright:
© 2023 The Authors

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