Thursday 4th of April 2019 from 2 pm to 3pm, salle de conférences (RDC) du bâtiment NANOBIO DCM, 570 rue de la chimie, 38610 GIERES
Verifiable modelling of physical processing in the various compartments of the gut
Summary - I discuss the rheological and physiological difficulties in predicting mixing and propulsion of digesta within the intestinal lumen. I also describe the use of spatiotemporal mapping to quantify movements in ex vivo segments of the intestinal wall in real time, the use of this data in computational fluid dynamic models to predict flow and mixing, and the concurrent use of dye marker excretion profiles to validate the models. Further I give an example of how discrepancies between the two can highlight previously unknown sources of mixing. Finally I discuss recent work of the stomach.
Flows and interfaces at micro scales : the gut and the microcapsule, Clément de Loubens.
Friday 9th of November 2018 from 2 pm to 3pm, salle de conférences (RDC) du bâtiment NANOBIO DCM, 570 rue de la chimie, 38610 GIERES
Challenges in Rheological Design for Food & Skin Care Products,
Summary - Food researchers & developers design sensorially attractive products under specific constraints (e.g. nutritional composition, regulation, cost of ingredients and manufacturing). The relevant “rheological design spaces” (deformations, stresses, length & time scales) determine the required knowledge and equipment and have to be well managed. Similar considerations apply to other consumer products, e.g. skin care. The talk will discuss the nature of such design spaces from different viewpoints : (a) macroscopic characterisation, (b) product structure and (c) interaction with the human body. The interfaces between physical, biological and psychological sciences are given particular attention.