Séminaires à venir

10 SEP

Séminaire interne. Par TBA Le 10 Septembre 2024 à 11h00 - Salle de séminaires 4ème étage - LJP - Tours 22-23 TBA.

17 SEP

TBA Par Gabriel Amselem - LadHyXau - Ecole Polytechnique, Palaiseau Le 17 Septembre 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 22-32- 4e et. - P407 TBA

24 SEP

TBA Par Jean-Marie Frachisse, CNRS I2BC, Department of Cell Biology, Gif-sur-Yvette Le 24 Septembre 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 22-32- 4e et. - P407 TBA

08 OCT

Séminaire des nouveaux entrants. Par TBA Le 8 Octobre 2024 à 11h00 - Salle de séminaires 4ème étage - LJP - Tours 22-23 TBA

---

Séminaires passés

Uncovering and leveraging design principles in Boolean models of gene regulatory networks Par Ajay Subbaroyan, The Institute of Mathematical Sciences, Tamil Nadu, India Le 16 Juillet 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 22-32- 4e et. - P407 Boolean networks (BNs) are a well-established framework for modeling the dynamics of gene regulatory networks (GRNs). In Boolean GRNs, genes can be either "on" or "off", with their dynamics dictated ...

Community transitions and the emergence of alternative stable states in microbial systems Par Daniel Amor , ENS Physics Department, Paris Le 2 Juillet 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 22-32- 4e et. - P407 Microbial communities often face external perturbations that can induce lasting changes in their composition and functions. Responses to such perturbations can drive community functions, including ...

Bacteria exploring Newtonian and non-Newtonian complex fluids: from behavioral variability to medium assisted tumbling Par Eric Clément, PMMH-ESPCI-PSL, Sorbonne University, University Paris-Cité, Paris Le 25 Juin 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 22-32- 4e et. - P407 Understanding the way motile micro-organisms such as bacteria explore their environment is central to many ecological, medical and biotechnological issues. Here, I will present recent advances on the ...

Séminaire interne. Par Internal Seminar: Martin Garic, Joseph Ackermann Le 18 Juin 2024 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 See the English version of the webpage.

Disorder-induced cooperative behaviour in aligning self-propelled particle systems Par Eloise Lardet - Imperial College London -UK Le 11 Juin 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 32-33 - 5e et. - P533 Flocking is a prime example of how robust collective behaviours can emerge from simple interaction rules. The famous Vicsek model displays a transition from disorder to flocking by varying different ...

From perception to action without nerves and muscles: lessons from plants Par Yoel Forterre - Laboratoire IUSTI, UMR 7343 CNRS, Aix Marseille University Le 4 Juin 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T32-33, 5e étage - P.531 As sessile organisms, plants face a constantly changing environment with no means of escape. Thus, despite their lack of nerves and muscles, they have evolved unique mechanisms to perceive and respond...

Three-dimensional “cellular ballons” or cysts: microfluidic formation, growth, deformability, instabilities. Par Pierre Nassoy - Laboratoire de Photonique Numérique et Nanosciences (LP2N) - Univ. Bordeaux - Talence Le 28 Mai 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 32-33 - 5e et. - P533 Organoids are lumen-containing multicellular structures that recapitulate key features of the organs. We will first present a microfluidic technology that allows to produce them at high throughput in ...

Deciphering the role of noise in cell shape changes during epithelial-to-mesenchymal transition Par Wolfram Pönisch - The University of Cambridge, UK Le 21 Mai 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 32-33 - 5e et. - P533 The development of an organism requires sequential state transitions towards more specialised cell types. Many state transitions coincide with changes in cell shape, with emerging evidence suggesting ...

Séminaire interne. Par Nicolas Harmand and Nelly Henry Le 14 Mai 2024 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 See English version.

Shedding light on micro-algae: phototaxis-induced collective phenomena Par Raphaël Jeanneret - LPENS, Physics Department ENS Le 30 Avril 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 32-33 - 5e et. - P533 Motile micro-algae modify their environment by absorbing light, consuming and releasing chemical compounds and generating flows. Flows, light, and chemicals in turn influence their motion. These ...

Programmable self-assembly of nanotubes using DNA origami colloids Par Daichi Hayakawa - Rogers Lab, Brandeis University Le 23 Avril 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 32-33 - 5e et. - P533 Nature is replete with self-assembled materials that have one or more self-limited dimensions, including shells, tubules, and fibers. Despite significant advances in making nanometer- and ...

Séminaire interne. Par Angelo Charry and Maxime Deforet Le 2 Avril 2024 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Séminaire interne. Les résumés se trouvent sur la version anglaise de la page.

Mechanics and polarity in B cells Par Paolo Pierobon (Institut Cochin, CNRS , Université Paris Cité) Le 26 Mars 2024 à 11h00 - Laboratoire Jean Perrin - Campus Jussieu - T 32-33 - 5e et. - P533 B cells serve as the primary producers of antibodies within the immune system. To elicit an effective immune response, they must recognize and internalize antigens through a specialized signaling ...

Oriented flows in biological tissues Par Matthias Merkel (CPT, Marseille) Le 19 Mars 2024 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 I will talk about two project involving oriented tissue flows. 1) Most animals display one or more body axes (e.g. head-to-tail, left-right, ventral-dorsal), which usually emerge during early ...

Exploring Adaptive Collective Systems with Swarms of Learning Robots Par Nicolas Bredèche (ISIR, SU) Le 12 Mars 2024 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 I will give a brief overview of the research we are conducting on using robot swarms to study adaptive collective systems in the physical world. I will focus on (1) robot swarm to study physical ...

Séminaire interne Par Internal Seminar: Clément Nizak, Martin Maliet Le 5 Mars 2024 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Séminaire interne.

TBA Par Jeremy O'Byrne (LJP) Le 30 Janvier 2024 à 11h00 - salle de séminaires 5ème étage - LJP - Tours 32-33 TBA

Topology and robustness in early fate decision in the fly embryo Par Arghyadip Mukherjee (ENS Paris) Le 23 Janvier 2024 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 During embryogenesis, the earliest cell fate decision is often linked to nuclear positioning, whose control arises from the integration of the cell cycle oscillator and associated cytoskeletal ...

Structured populations and other stories Par Alia Abbara (EPFL) Le 9 Janvier 2024 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 A classical question in population genetics is to understand the spread of a mutant with a fitness advantage in a population, in  particular its fixation probability. This question has been ...

TBA Par Samuel Bell (LJP) Le 19 Décembre 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 TBA

Constraining the immune system dynamics with a coevolving population: the HIV, flu and microbiome cases Par Andrea Mazzolini (LPENS) Le 5 Décembre 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 The adaptive immune system is an extremely complex machinery that continuously evolves to recognize and fight external pathogens. This chase is often made harder by the fact that pathogens also evolve...

Can we program DNA reaction-diffusion fronts with molecular motors Par Nicolas Lobato-Dauzier (Laboratoire Jean Perrin, Sorbonne Université) Le 28 Novembre 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Couplings between biochemical and mechanical processes have a profound impact on embryonic development. However, in-vitro studies capable of quantifying these interactions have remained elusive. I ...

Internal LJP Seminar Par Internal Seminar: Matteo Dommanget-Kott, Jean-Christophe Galas Le 21 Novembre 2023 à 11h00 - Salle de séminaires 5ème étage - LJP

Ecology of host and pathogen and limited predictability of evolution Par Pierre Barrat-Charlaix (PoliTo) Le 14 Novembre 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 Seasonal influenza viruses repeatedly infect humans in part because they rapidly change their antigenic properties and evade host immune responses, necessitating frequent updates of the vaccine ...

Flexible selection of task-relevant features through population gating Par Joao Barbosa (ENS Paris) Le 7 Novembre 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Brains can gracefully weed out irrelevant stimuli to guide behavior. This feat is believed to rely on a progressive selection of task-relevant stimuli across the cortical hierarchy, but the specific ...

Internal LJP Seminar Par Internal Seminar: Gaspard Junot, Georges Debregeas Le 24 Octobre 2023 à 11h00 - Salle de séminaires 5ème étage - LJP

Topological defects control morphogenesis of mesenchymal tissues in vitro Par Claire Dessalles (University of Geneva, Switzerland) Le 17 Octobre 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Morphogenesis, the process by which tissues acquire their shape, hinges on a finely orchestrated collective motion of cells autonomously choreographing themselves to a well-defined final position. ...

Learning and memory in adult zebrafish: Insights from the last 10 years of research Par Alexis Buatois Le 26 Septembre 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 Alexis Buatois (1) Institute of Neuroscience and Physiology, Department of Neurochemistry and Psychiatry, University of Gothenburg, Su Sahlgrenska, 41345, Göteborg, Sweden The zebrafish has...

Assessing the complexity of large ecological communities through the prism of disordered systems Par Ada Altieri (Université Paris Cité) Le 19 Septembre 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33   In this talk, I will address some timely questions in theoretical ecology — from configurational landscape analysis to the long-standing diversity/stability debate up to the emergence of...

Bottom-up engineering of bioinspired active systems for biological activity Par Isabella Guido (University of Surrey, UK) Le 12 Septembre 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 In nature, the self-assembly of biopolymers and motor proteins in the complex intracellular environment leads to interesting emergent behaviour that is crucial for cellular functions and motility. The...

Séminaire interne Par Internal Seminar: Raphaël Candelier, Samuel Bell Le 4 Juillet 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33

Resource allocation in kinetic models of cell metabolism Par Wolfram Liebermeister (INRAE Jouy-en-Josas) Le 30 Mai 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 Metabolic fluxes in cells are often assumed to reflect an economical use of enzymes. To apply this principle of "minimal enzyme cost" to metabolic modelling and to study its biological consequences, I...

Séminaire interne Par Internal Seminar: André Estevez-Torres, Baptiste Blanc Le 16 Mai 2023 à 00h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33

Motion of zoospores approaching a root Par Philippe Thomen (Université Côte d’Azur) Le 9 Mai 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 Phytophthora species are plant pathogens that cause considerable damage to agrosystems and ecosystems, and have a major impact on the economy. Infection occurs when their biflagellate zoospores ...

Séminaire interne Par Internal Seminar: Maxime Deforet, Soumaiya Imarraine Le 11 Avril 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33

Design principles, complexity and model selection constraining the logic in Boolean regulatory networks Par Olivier C. Martin (Institut des Sciences des Plantes de Paris Saclay) Le 4 Avril 2023 à 12h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Numerous modelers have inferred Boolean gene regulatory networks in different biological systems, taking genes to be either on or off depending on their inputs according to associated logic rules. ...

Adding automation and reactiveness to your experiments: motivation, tools and applications to cybergenetics Par Gregory Batt (Institut Pasteur, INRIA) Le 28 Mars 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tour 32-33 Small-scale, low-cost bioreactors are emerging as powerful tools for microbial systems and synthetic biology research. They allow tight control of cell culture parameters over long durations. These ...

Collective movements of fish in complex environments Par Aurélie Dupont (LIPhy Grenoble) Le 21 Mars 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 Crowd movements can be observed across species and scales: from insectsto mammals but also in non-cognitive systems such as eukaryotic cells.But, what happens when gregarious animals have to ...

Synthetic DNA reaction-diffusion system for pattern formation, materialization, and wrinkling Par Ibuki Kawamata (Tohoku University, Ochanomizu University) Le 14 Mars 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 In this talk, I introduce our experimental attempts to design artificial chemical reaction-diffusion systems that mimic pattern formations and other phenomena of the early stage of biological ...

Catalysis from a physics perspective Par Olivier Rivoire (ESPCI) Le 14 Février 2023 à 11h00 - salle de séminaires 5ème étage - LJP - Tour 32-33 Catalysis, the acceleration of chemical reactions by substances that are not changed in the process, is essential to life as well as to our industry. The physical principles underlying catalysis are ...

Physics of Behavior Across Scales Par Antonio Carlos Costa (ENS Paris) Le 24 Janvier 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Recent years have seen an explosion in our ability to measure the movement dynamics of animals in naturalistic environments. However, such data poses tremendous challenges for quantitative analysis, ...

Séminaire interne Par Internal Seminar: Marcus Ghosh, Quentin Guigue Le 10 Janvier 2023 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33

Diversity begets stability in competitive ecological communities Par Matteo Smerlak (MPI Leipzig) Le 13 Décembre 2022 à 11h00 - Salle de séminaires 5ème étage, Tour 32-33 Ecological theory has grappled for fifty years with the “diversity-stability debate”. On the one hand, random matrix arguments due to Robert May imply that large, complex ecosystems cannot...

Oxygen driven spreading and microphase separation in Dictyostelium discoideum Par Jean-Paul Rieu (Université Claude Bernard Lyon 1) Le 6 Décembre 2022 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 Oxygen driven spreading and microphase separation of eukaryotic cells   J.-P. Rieu1,*, A. Carrère1, N. Ghazi1, C. Anjard1, F. Detchevery1, O. Cochet-Escartin1, S. Hirose3,K. Funamoto3, ...

Séminaire interne Par Claude Loverdo & Mafer Seow Le 29 Novembre 2022 à 11h00 - Salle de séminaires 5ème étage - LJP - Tours 32-33 TBA

Mathematical approaches to modelling biological complexity: Inverse blebbing and tissue growth in Drosophila abdomen Par Andrea Cairoli (Crick Institute) Le 22 Novembre 2022 à 11h00 - Salle de séminaires 5ème étage, Tour 32-33 Cells are the building blocks of living systems and undoubtedly fascinating entities. They move autonomously, interact among themselves and with the microenvironment, react to external perturbations, ...