Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Green Algae

Green Algae

Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...

Other Algae

Other Algae

The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...

Steady, Laminar Flow Between Parallel Plates

Steady, Laminar Flow Between Parallel Plates

Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.

Overview of Algae

Overview of Algae

The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...

Steady, Laminar Flow in Circular Tubes

Steady, Laminar Flow in Circular Tubes

Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...

Free Jet

Free Jet

Free jets describe the flow of liquid exiting a reservoir through an opening into the atmosphere without resistance. The velocity (v) of the liquid jet is derived using Bernoulli's principle and expressed as:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Helical opto-thermoviscous flows drive out-of-plane rotation and particle spinning in a highly viscous micro-environment.

Light, science & applications·2026

Same author

Simple and reliable method for predicting extracorporeal membrane oxygenation flow rates and circuit pressures.

Intensive care medicine experimental·2026

Same author

Editorial: Fourth Annual APS DSOFT Gallery of Soft Matter.

Physical review. E·2026

Same author

Rotation reversal of chiral bacterial vortices.

Soft matter·2025

Same author

Phototactic Decision-Making by Microalgae.

Physical review letters·2025

Same author

Light-Induced Phase Separation with Finite Wavelength Selection in Photophobic Microalgae.

Physical review letters·2025

Search research articles

Related Experiment Video

Updated: Jan 10, 2026

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

Pure Hydrodynamic Instabilities in Active Jets of Puller Microalgae.

Isabelle Eisenmann¹, Marco Vona², Nicolas Desprat¹

¹Université PSL, Laboratoire de Physique de l'École normale supérieure, ENS, CNRS, Sorbonne Université, Université Paris Cité, F-75005 Paris, France.

Physical Review Letters

|November 21, 2025

Summary

Researchers used light to control the movement of algae, creating active jets and managing flow instabilities. This breakthrough offers new ways to steer active fluids for biological and applied uses.

More Related Videos

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level

Published on: January 10, 2017

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Published on: July 10, 2015

Related Experiment Videos

Last Updated: Jan 10, 2026

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level

Published on: January 10, 2017

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Published on: July 10, 2015

Area of Science:

Physics of active matter
Microbiology
Fluid dynamics

Background:

Active fluids exhibit spontaneous flow instabilities and complex patterns.
Controlling active particles spatiotemporally is challenging but crucial for biological and applied fields.

Purpose of the Study:

To demonstrate spatiotemporal control of active particles using phototaxis.
To investigate the control of flow instabilities in active fluids.

Main Methods:

Utilized phototaxis to steer millions of swimming Chlamydomonas reinhardtii algae.
Employed preferential cell orientation to control active jets and instabilities.
Combined experimental data with analytical modeling and simulations.

Main Results:

Successfully created active jets and controlled pearling and buckling instabilities.
Confirmed theoretical predictions of self-generated flow leading to jet destabilization.
Showed that 'puller' algae can mimic 'pusher' behavior with proper orientation tuning.

Conclusions:

Light-enabled phototaxis provides efficient control over active fluids.
Demonstrated a novel method for manipulating active particle behavior and instabilities.
Opened new avenues for applications requiring precise control of microscale active systems.