Joel Marthelot

Bio-soft actuation @CNRS
IUSTI, Aix-Marseille University

[Joel Marthelot @biosoftact]

Fresh off the press @NatureComms, our work on wing deployment in Drosophila 🪰:
https://t.co/ikMkvsS7Ey
Work by: @HadjajeS, @Ignacio00432963, Marie-Julie Dalbe and Raphaël Clément

[Joel Marthelot @biosoftact]

@ScienceMagazine @fluidity_x The molecular origin of this rapid softening remains unknown. Future studies and new genetic tools are needed to uncover the signals driving the ultra-fast mechanical remodeling of the cell wall.
Paper here: https://t.co/oPGOElqqG9

[Joel Marthelot @biosoftact]

Fresh off the press in @ScienceMagazine! @fluidity_x and Yoël’s work on the actuation of the Venus flytrap. 🪴⚡

No muscles. No nerves. So what powers the trap?

Cutting the trap suppresses its mechanical amplifier, the snap-through instability, and reveals the active motion.

[Joel Marthelot @biosoftact]

@ScienceMagazine @fluidity_x Together, these measurements rule out rapid water transport or sudden turgor changes as drivers of closure.
Instead, closure is triggered by rapid softening of the epidermal wall: bending comes from release of pre-stress in the turgid mesophyll after weakening of the outer layer

[nature @Nature]

Ever since Charles Darwin proclaimed the carnivorous Venus flytrap one of the “most wonderful” plants in the world, scientists have been trying to work out how it snaps shut so quickly on its prey. A research team has now snapped a key piece of the puzzle in place.

https://t.co/NOpZHsSzWZ

[Science Magazine @ScienceMagazine]

The Venus flytrap is renowned for its ultrafast snap traps, which can capture insects in a fraction of a second.

New research reveals that trap closure is triggered by a rapid softening of the epidermal cell walls, uncovering the physical mechanism behind this remarkable movement.

Learn more this week in Science: https://t.co/35uDGps8Qe

[Liquids&Elasticity LAB @Princeton @LiquidsLab]

Advertisement for an advanced course in Udine, Italy 🇮🇹 this summer ☀️. Learn about mechanics for the fabrication and programming of soft robots 🦑. https://t.co/72PJXuY2KG
organized along with @biosoftact

[Sciences et Avenir @Sciences_Avenir]

La mouche drosophile est capable de prouesses pour déployer ses ailes https://t.co/zjoNg6ukVo

[Etienne Jambon-Puillet @EJambonP]

New preprint: https://t.co/v26f6PQYM2
"Dense array of elastic hairs obstructing a fluidic channel"
Explanations below 🧵👇

[Joel Marthelot @biosoftact]

How insects deploy their wings. Highlight by @IBDMmarseille on Simon's paper in Nature Comms @NaturePortfolio: https://t.co/T3nfse9cwo

[Joel Marthelot @biosoftact]

Fresh off the press @NatureComms, our work on wing deployment in Drosophila 🪰:
https://t.co/ikMkvsS7Ey
Work by: @HadjajeS, @Ignacio00432963, Marie-Julie Dalbe and Raphaël Clément

[Joel Marthelot @biosoftact]

@Tomo_1121 Thank you Tomohiko!

[Alain Schuhl @AlainSchuhl]

Comment la mouche sortant de sa chrysalide déploie ses ailes en quelques minutes ?

https://t.co/BUVkBo5PAL C'est un processus qui combine dépliement d'une structure et étirement du tissu cellulaire.

@CNRSingenierie @CNRS

Des recherches avec des applications dans le domaine des structures déployables ou de la robotique flexible

[CNRS Ingénierie @CNRSingenierie]

#RésultatScientifique 🔎 | Comment la mouche déploie ses ailes

🔬 @biosoftact @iustiumr7343 🤝 @univamu @CNRS 📍 @CNRS_dr12
🔬 @IBDMmarseille 🤝 @univamu @CNRS 📍 @CNRS_dr12 @CNRSbiologie

https://t.co/bi2iXkgjSz

[Joel Marthelot @biosoftact]

By combining the wing's mechanics and microstructure, we predict the sweet spot the insect uses to deploy its wing at low pressure and what limits the speed of deployment

[Joel Marthelot @biosoftact]

Fresh off the press @NatureComms, our work on wing deployment in Drosophila 🪰:
https://t.co/ikMkvsS7Ey
Work by: @HadjajeS, @Ignacio00432963, Marie-Julie Dalbe and Raphaël Clément

[Joel Marthelot @biosoftact]

We measure the wing's mechanical properties by stretching it and its viscoelastic properties with nanoindentation