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TZID:Europe/Paris
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UID:0-914@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20231208T110000
DTEND;TZID=Europe/Paris:20231208T120000
DTSTAMP:20231127T092626Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/physics-biology-i
 nterface-seminar-carles-blanch-mercader/
SUMMARY:Physics-Biology interface seminar: Carles Blanch Mercader - Salle d
 es séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 8 Déc 23 1
 1:00
DESCRIPTION:From interfacial tubulation in Alcanivorax borkumensis biofilms
  to folding of membranes with nematic order.Carles Blanch Mercader ( Physi
 co-Chimie Curie ) Assemblies of anisotropic cells can exhibit long-range 
 orientational order and topological defects\, which often influence proces
 ses of shape formation. In the first part of this talk\, I will introduce 
 conditions for a morphological transition between a spherical and a dendri
 tic phase in Alcanivorax borkumensis biofilm-covered oil microdroplets. Ex
 perimental observations demonstrate preferential interfacial tubulation at
  topological defects\; bacteria assemblies on these tubes exhibit long-ran
 ge nematic order. The second part of this talk focuses on the role of orde
 r-curvature couplings on equilibrium states of a membrane with nematic ord
 er that are generated by an integer topological defect. For varying elasti
 c parameters and boundary anchoring conditions\, the instability of a flat
  disc towards an out-of-plane deformed surface will be discussed. Finally\
 , I will argue how these results can be relevant for biological systems an
 d show how bacteria biofilms can utilize topological defects to facilitate
  membrane deformation and enhance oil access.The first part is a joint wor
 k with M. Prasad\, N. Obana\, S.-Z. Lin\, K. Sakai\, J. Prost\, N. Nomura\
 , J.-F. Rupprecht\, J. Fattaccioli\, and A.S. Utada. The second part is a 
 joint work with C. Thibault\, Q. Chaboche\, and D.J.G. Pearce.
CATEGORIES:physbio,seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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TZID:Europe/Paris
X-LIC-LOCATION:Europe/Paris
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DTSTART:20231029T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
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