Ricard Alert Zenón
@RicardAlert
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Research Group Leader at @mpi_pks and @csbdresden. Previously @HFSP postdoc @Princeton, and PhD @FisicaUB. Biophysics theory and active matter physics.
Dresden, Germany
Joined September 2019
Check our new paper @PhysRevE showing how spatial variability in growth affects the buckling transition! Useful way for tissues to control buckling just by localizing growth. With Rahul G. Ramachandran and @lepuslapis @mpi_pks. See Pierre's thread below!.
It's great to see this now published @PhysRevE!.See below for a thread summarising the preprint - but of course you should read the paper for some solid mechanics. .
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RT @PhysRevE: Analytical calculations and numerical sampling reveals the effects of spatially disordered growth on buckling instability of….
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Check out this opportunity for summer internships in biological physics! Please apply before Dec. 9th to work for 3 months with one of the groups @mpi_pks.
Fully funded summer #internships in #biophysics @mpi_pks in Dresden - apply now to join our group (or the groups of @RicardAlert, @c_kurzthaler, @mpopov1c, or Frank Jülicher) over the summer of 2025! . Deadline: 9th of December, 2024.
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This was work with Debarghya Banerjee, which we started when he was @mpi_pks. If you know of other examples of active screws, or you wonder about their collective behavior, please let me know!.
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We found that there are small chiral flows around topological defects, with a chiral activity about an order of magnitude smaller than the achiral one. Could slow rolling motion of the cells explain it?
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We analyzed data from our previous work with @KSCopenhagen, Ned Wingreen, and @shaevitz on colonies of M. xanthus.
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If the screws also roll sideways, they produce chiral active stresses. So, rolling is a mechanism whereby the chirality of individual constituents can give rise to collective chiral effects.
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We propose a microscopic model for active screws and we coarse-grain it. We show that a collective of active screws behaves like an active nematic.
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In other types of active chiral particles, the axis of rotation and propulsion are different. In active screws, the axis of rotation and propulsion are the same.
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New preprint! We introduce active screws: a new class of active particles that propel by spinning on a substrate. There are several examples: from from gliding microtubules to soil bacteria, and even magnetically-driven colloidal helices.
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📢 The call for distinguished @mpi_pks fellows is open! We provide excellent 3-year postdoc positions that allow full independence to outstanding candidates. Please apply!.
Opening for a Distinguished Postdoctoral Fellow @mpi_pks ! This is an independent Fellowship with free choice of research topics and individual appearance on our research page , apply by 15 November:.
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RT @mpi_pks: Cells move in groups often led by specialised leader cells. Work @NaturePhysics by @RicardAlert @mpi_pks & collaborators shows….
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RT @UniBarcelona: #RecercaUB | 🦠 Un estudi demostra que en el moviment col·lectiu cel·lular hi participen totes les cèl·lules, sense cèl·lu….
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👉News piece about our recent work @NaturePhysics on cell trains! @LeoneRossetti in @XavierTrepat's lab generated leader cells with light. We used these experiments to develop a model for how asymmetries in traction forces drive collective cell migration.
#PCBCommunity | A team led by @IBECBarcelona has studied the migratory movement of cells using light control. ➡️Results show there is no leader cell directing the collective movement, as believed so far, but that all cells participate in the process. 📝@NaturePhysics
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RT @marionamec: 🪇Nou vídeo! Aquest cop faig ressò d'una notícia científica:.Han trobat com fer la pell transparent amb el pigment dels Dori….
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📢 IgNobel prize for active matter! The physics of drunk worms! 🪱.
Congratulations to Daniel Bonn, Antoine Deblais, Tess Heeremans and Sander Woutersen! They won an Ig Nobel prize for their research in which they investigate the behaviour of drunk worms as a particular form of active matter.
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RT @marionamec: 🐜Ho pots saber tot d'una formiga, però això no t'ajuda a saber com és un formiguer. 🚘Entendre un motor no t'ajuda a enten….
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RT @maxplanckpress: Calling all emerging scientists - it’s time to send us an application! 😉😎 Lead your own #MaxPlanck Research Group w/ €2….
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RT @marionamec: 😸La història d' F. D. C. Willard, el primer gat en publicar un article científic! D'això en vaig parlar amb la @noemipolls….
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