Research Group Leader at @mpi_pks and @csbdresden. Previously @HFSP postdoc @Princeton, and PhD @FisicaUB. Biophysics theory and active matter physics.
Dresden, Germany
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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!
journals.aps.org/pre/abstrac…
It's great to see this now published @PhysRevE!
doi.org/10.1103/PhysRevE.110…
See below for a thread summarising the preprint - but of course you should read the paper for some solid mechanics...
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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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We analyzed data from our previous work with @KSCopenhagen, Ned Wingreen, and @shaevitz on colonies of M. xanthus.
nature.com/articles/s41567-0…
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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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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 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.
arxiv.org/abs/2410.12263v1
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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 pks.mpg.de/research/division… , apply by 15 November:
pks.mpg.de/visitors-program/…
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Ricard Alert Zenón retweeted
Cells move in groups often led by specialised leader cells. Work @NaturePhysics by @RicardAlert @mpi_pks & collaborators shows that leader cells cannot autonomously guide groups: followers must contribute to build a global force asymmetry for group motion. doi.org/10.1038/s41567-024-0…
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Ricard Alert Zenón retweeted
#RecercaUB | 🦠 Un estudi demostra que en el moviment col·lectiu cel·lular hi participen totes les cèl·lules, sense cèl·lules guia, com es pensava fins ara.
🔬 Lidera @XavierTrepat, de la #UniBarcelona i @IBECBarcelona.
👉web.ub.edu/web/actualitat/w/…
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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 @XavierTrepat @UniBarcelona @CampusClinicUB #IBEC #ICREA @CIBERBBN @LeoneRossetti #MSCA @KingsCollegeLon @RicardAlert @mpi_pks @csbdresden
To learn more ➡️ bit.ly/3TxAZxH
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Ricard Alert Zenón retweeted
🪇Nou vídeo! Aquest cop faig ressò d'una notícia científica:
Han trobat com fer la pell transparent amb el pigment dels Doritos! 🫥😱
piped.video/G7slf5lm6Kw?si=vQU1…
@neurofregides
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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. iop.uva.nl/content/news/2024…
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Ricard Alert Zenón retweeted
🐜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 entendre els embussos de trànsit.
📖Llegeix-me a @nuvol_com i t'explico per què “el tot és molt més que la suma de les parts”.
@neurofregides
L’estudi de la complexitat és un camp de recerca fascinant que ens està ajudant a entendre millor la nostra atmosfera, els sistemes vius i fins i tot la nostra societat.
Article de @marionamec de @neurofregides:
nuvol.com/ciencia/el-tot-es-…
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Ricard Alert Zenón retweeted
Calling all emerging scientists - it’s time to send us an application! 😉😎 Lead your own #MaxPlanck Research Group w/ €2.7M in funding over 6 yrs, full independence & resources to hire staff. State-of-the-art infrastructure awaits you!🌟 Apply today➡️mpg.de/career/max-planck-res…
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Ricard Alert Zenón retweeted
😸La història d' F. D. C. Willard, el primer gat en publicar un article científic! D'això en vaig parlar amb la @noemipolls a la @primerapedra!!
Un gat científic? Aquesta és la història que ens explica la @marionamec de @neurofregides a @primerapedra rac1.cat/a-la-carta/detail/5…
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Ricard Alert Zenón retweeted
We are hiring! You are great with people from all over the world, well-organized, and fluent in English and German? Then join our dynamic visitors program team!
Application deadline is 30. September.
mpg.de/22505977/fremdsprache…
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