Your browser doesn't support javascript.
loading
Tempering governs the milk fat crystallisation and viscoelastic behaviour of unprocessed and homogenised creams.
Logan, Amy; Lopez, Christelle; Xu, Mi; Day, Li; Oiseth, Sofia; Augustin, Mary Ann.
Afiliación
  • Logan A; CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia. Electronic address: amy.logan@csiro.au.
  • Lopez C; INRAE, UR BIA, F-44 306 Nantes, France. Electronic address: christelle.lopez@inrae.fr.
  • Xu M; CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia. Electronic address: michelle.xu@waletagroup.com.
  • Day L; CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia. Electronic address: li.day@agresearch.co.nz.
  • Oiseth S; CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia. Electronic address: sofia.oiseth@chalmersindustriteknik.se.
  • Augustin MA; CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia. Electronic address: maryann.augustin@csiro.au.
Food Res Int ; 147: 110557, 2021 09.
Article en En | MEDLINE | ID: mdl-34399534
The crystallisation behaviour of milk fat plays an important role in the functionality and sensory properties of fat-rich dairy products. In this study, we investigated the impact of tempering to 25 °C on the viscoelastic properties, particle size and thermal behaviour of 20% w/w unprocessed and homogenised creams prepared from bovine milk. The crystallisation properties were examined by synchrotron X-ray diffraction (XRD) at small (SAXS) and wide angle (WAXS) and differential scanning calorimetry (DSC). Oscillation rheology was performed to characterise the cream's viscoelastic properties. Homogenisation (35 MPa) reduced the average droplet size from 4.4 to 1.3 µm. After 24 h storage at 4 °C, milk fat structures showed triacylglycerol (TAG) 2L and 3L(001, 002, 003, 005) lamellar stacking orders associated predominantly with the α and ß' polymorphic forms. Tempering to 25 °C induced the complete melting of the 3L crystals and led to an irreversible loss in the elastic modulus (G') and a reduction in the viscous modulus (G'') once returned to refrigerated conditions, due to changes in the particle-particle interactions and structure of the reformed milk fat crystals. The results demonstrate that crystallisation behaviour of milk fat is influenced by droplet size and the rearrangement of triacylglycerol (TAG) upon tempering, and lead to changes in the viscoelastic behaviour of dairy products containing a high level of milk fat.
Asunto(s)
Palabras clave

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Leche Idioma: En Revista: Food Res Int Año: 2021 Tipo del documento: Article

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Leche Idioma: En Revista: Food Res Int Año: 2021 Tipo del documento: Article