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Two-layer elastic models for single-yeast compressibility with flat microlevers.

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorDELMARRE, Léo
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorHARTÉ, Etienne
dc.contributor.authorDEVIN, Anne
hal.structure.identifierLaboratoire Ville, Mobilité, Transport [LVMT]
hal.structure.identifierExpérimentation et modélisation pour le génie civil et urbain [MAST-EMGCU]
dc.contributor.authorARGOUL, Pierre
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorARGOUL, Françoise
dc.date.accessioned2023-11-20T16:46:20Z
dc.date.available2023-11-20T16:46:20Z
dc.date.created2023-10-06
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/184990
dc.description.abstractEnUnicellular organisms such as yeast can survive in very different environments thanks to a polysaccharide wall that reinforces their extracellular membrane. This wall is not a static structure, as it is expected to be dynamically remodeled according to growth stage, division cycle, environmental osmotic pressure and ageing. It is therefore of great interest to study the mechanics of these organisms, but they are more difficult to study than other mammalian cells, in particular because of their small size (radius of a few microns) and their lack of an adhesion machinery. Using flat cantilevers, we perform compression experiments on single yeast cells (S. cerevisiae) on poly-L-lysine-coated grooved glass plates, in the limit of small deformation using an atomic force microscope (AFM). Thanks to a careful decomposition of force-displacement curves, we extract local scaling exponents that highlight the non-stationary characteristic of the yeast behavior upon compression. Our multi-scale nonlinear analysis of the AFM force-displacement curves provides evidence for non-stationary scaling laws. We propose to model these phenomena based on a two-component elastic system, where each layer follows a different scaling law.
dc.description.sponsorshipAnalyse et modélisation temps fréquence de la rhéologie des systèmes vivants
dc.language.isoen
dc.subject.enYeast mechanics
dc.subject.enWall Model
dc.subject.enmulti-scale models
dc.subject.enAtomic force Microscopy
dc.title.enTwo-layer elastic models for single-yeast compressibility with flat microlevers.
dc.typeDocument de travail - Pré-publication
dc.subject.halPhysique [physics]
bordeaux.hal.laboratoriesLaboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
hal.identifierhal-04260141
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04260141v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=DELMARRE,%20L%C3%A9o&HART%C3%89,%20Etienne&DEVIN,%20Anne&ARGOUL,%20Pierre&ARGOUL,%20Fran%C3%A7oise&rft.genre=preprint


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