Lipase diffusion in oil-filled, alginate micro- and macrobeads - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Food Hydrocolloids Année : 2018

Lipase diffusion in oil-filled, alginate micro- and macrobeads

Résumé

Triglycerides, which are broken down in the lower part of the intestinal tract, give a stronger ileal brake feedback, resulting in a feeling of satiety and causing people to eat less. The digestion of triglycerides into fatty acids by lipase in the intestine can be delayed by encapsulating oil droplets. In this study the release of fatty acids and oil droplet breakdown in a simulated intestinal system was investigated, for oil droplets encapsulated in alginate micro- (10.7 μm) and macrobeads (1.77 mm). It was found that fatty acid release rate was greatly decreased by encapsulating the oil droplets into an alginate matrix compared to loose droplets. Microscopic imaging of the breakdown of the oil droplets showed a sharp front moving from the bead interface to the centre of the bead, and the change in position of the front scaled linear with time. The motion of the front is well described by combining the mass balance for lipase with a Maxwell-Cattaneo type equation, for the mass flux vector. The front in microbeads seemed to move slightly slower (0.15 (±0.04) μm per minute) than for the macrobeads (0.20 (±0.02) μm per minute). The release of free fatty acids in microbeads was faster than in macrobeads, despite the slower front movement, because of the larger amount of surface area available.
Fichier principal
Vignette du fichier
Leusden - Manuscript revised.pdf (441.95 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03192786 , version 1 (15-04-2021)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

Identifiants

Citer

Pauline van Leusden, Gertjan J. M. den Hartog, Aalt Bast, Michiel Postema, Erik van Der Linden, et al.. Lipase diffusion in oil-filled, alginate micro- and macrobeads. Food Hydrocolloids, 2018, 85, pp.242-247. ⟨10.1016/j.foodhyd.2018.07.028⟩. ⟨hal-03192786⟩
50 Consultations
87 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More