Titre :

Understanding antral contraction in human stomach through comparison with soft elastic reactor

Auteur(s) :

Jeantet, Romain [Auteur]
Science et Technologie du Lait et de l'Oeuf [STLO]
Delaplace, Guillaume [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Liu, M. [Auteur]
Xiao, J. [Auteur]
Dupont, Didier [Auteur]
Science et Technologie du Lait et de l'Oeuf [STLO]
Chen, X. [Auteur]

Titre de la manifestation scientifique :

6. International Conference on Food Digestion

Organisateur(s) de la manifestation scientifique :

Institut National de Recherche Agronomique (INRA) / AgroCampus Rennes : Science et Technologie du Lait et de l'oeuf (1253)

Ville :

Grenade

Pays :

Espagne

Date de début de la manifestation scientifique :

2019-04-02

Mot(s)-clé(s) :

viscosité
estomac
réacteur
digestion
onde péristaltique
contraction antrale
rhéologie
propriété rhéologique
réacteur élastique
analyse dimensionnelle

Mot(s)-clé(s) en anglais :

rheology
reactor
viscosity
ventriculus (stomach)

Discipline(s) HAL :

Sciences du Vivant [q-bio]/Alimentation et Nutrition
Sciences du Vivant [q-bio]/Ingénierie des aliments

Résumé en anglais : [en]

Human digestion, a major concern due to the rapid development of nutrition-related chronic diseases,rely apart from enzymatic reactions on homogenization of the gastric content by antral contractions.Although recent CFD ...
Lire la suite >Human digestion, a major concern due to the rapid development of nutrition-related chronic diseases,rely apart from enzymatic reactions on homogenization of the gastric content by antral contractions.Although recent CFD studies made it possible to explore the influence of the rheologicalproperties of the gastric content on the efficiency of gastric mixing, this key step is yet far from beingfully understood.ObjectiveThis work aims at discussing the influences of contraction frequency and viscosity of the digestain human gastric mixing by comparison with the mixing efficiency of an innovative soft elastic reactor(SER), that induces mixing by vibration of its wall in a similar way as antral contraction waves(ACWs) promote stomach motility.MethodologyIn this view, the SER mixing curve, recently established by Delaplace et al. (2018) using a dimensionalanalysis approach, was considered in order to determine the flow regime under which thegastric mixing of foods (viscosity ranging from 10-3 to 1 Pa.s) was performedMain findingsIt was shown that depending on the viscosity of the SER/stomach content and the amplitude of penetration/ACWs, the number of strikes/contractions required to achieve homogenization was largelydifferent. Moreover, the operating points of SER and ACWs mixing were close, justifying the comparisonbetween both reactors.ConclusionBased on this, the level of mechanical solicitation provided by human peristalsis was shown to benot as high as expected, and the mixing performance of distal region, confined in laminar regime,was found limited and not only due to mechanical solicitations. Further efforts are needed to investigatethe role of other physiological processes such as gastric secretions and gastric emptying inmixing performance of intragastric fluid homogenized by the antral contraction.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Références liée(s) :

http://www.infogestgranada2019.com/

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Processus aux Interfaces et Hygiène des Matériaux (PIHM)

Date de dépôt :

2021-10-05T09:50:48Z
2021-10-05T09:54:08Z