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

Bioreactor Controls-II

Bioreactor Controls-II

In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...

You might also read

Related Articles

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

Sort by

Same author

Influence of gravity variations on the activity of neuronal spheroids in an acoustic trap.

NPJ microgravity·2026

Same author

Country-level determinants of healthcare access for refugee populations in a host country: a comparative case study.

International journal for equity in health·2026

Same author

Adapting 'The Grog App' to Ask Aboriginal and Torres Strait Islander Peoples About Their Drinking in Primary Healthcare: A Delphi Study.

Drug and alcohol review·2026

Same author

Particle sizing in milk by combined differential dynamic microscopy and cryo-FIB-SEM tomography.

Soft matter·2026

Same author

Collective motion in bacterial suspensions is scale-free.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same author

Confinement controls bacterial spreading at all scales.

Journal of the Royal Society, Interface·2026

Same journal

Nanopore sequencing with proteins: synchronization and dischronization of molecular dynamics simulations with laboratory and industrial developments.

Soft matter·2026

Same journal

Catanionics from biosurfactants and regular surfactants: miscibility and structure.

Soft matter·2026

Same journal

Adhesives with a thickness smaller than the fractocohesive length enhance adhesion.

Soft matter·2026

Same journal

Non-equilibrium phase transitions in hybrid Voronoi models of cell colonies.

Soft matter·2026

Same journal

Effects of methoxy substituents on self-assembly and gelation performance of benzamide-based organogelators.

Soft matter·2026

Same journal

Rheology of <i>Escherichia coli</i> suspensions with various bacterial morphologies and motion characteristics.

Soft matter·2026

See all related articles

Search research articles

Related Experiment Video

Updated: May 14, 2026

Window on a Microworld: Simple Microfluidic Systems for Studying Microbial Transport in Porous Media

Window on a Microworld: Simple Microfluidic Systems for Studying Microbial Transport in Porous Media

Published on: May 3, 2010

Medium-assisted tumbling controls bacteria exploration in a complex fluid.

Héctor Urra¹, Thierry Darnige¹, Xavier Benoit-Gonin¹

¹Laboratoire PMMH-ESPCI Paris, PSL Research University, Sorbonne Université and Université Paris cité, 7, quai Saint-Bernard, Paris, France. hectorignaciou@gmail.com.

|July 23, 2025

Summary

This summary is machine-generated.

Bacterial exploration in non-Newtonian fluids is medium-assisted, not solely biologically driven. Local mechanical properties override E. coli

More Related Videos

Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior

Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior

Published on: January 31, 2020

Combining Fluidic Devices with Microscopy and Flow Cytometry to Study Microbial Transport in Porous Media Across Spatial Scales

Combining Fluidic Devices with Microscopy and Flow Cytometry to Study Microbial Transport in Porous Media Across Spatial Scales

Published on: November 25, 2020

Related Experiment Videos

Last Updated: May 14, 2026

Window on a Microworld: Simple Microfluidic Systems for Studying Microbial Transport in Porous Media

Window on a Microworld: Simple Microfluidic Systems for Studying Microbial Transport in Porous Media

Published on: May 3, 2010

Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior

Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior

Published on: January 31, 2020

Combining Fluidic Devices with Microscopy and Flow Cytometry to Study Microbial Transport in Porous Media Across Spatial Scales

Combining Fluidic Devices with Microscopy and Flow Cytometry to Study Microbial Transport in Porous Media Across Spatial Scales

Published on: November 25, 2020

Area of Science:

Microbiology
Rheology
Biophysics

Background:

Many natural fluids with bacteria exhibit non-Newtonian rheology.
Understanding bacterial spatial exploration in such complex media is crucial.

Purpose of the Study:

To investigate how E. coli's motility is affected by tunable macroscopic rheology.
To characterize bacterial navigation in Newtonian versus yield-stress fluids.

Main Methods:

Designed a motility medium with tunable rheology using carbomer grains.
Employed 3D Lagrangian tracking to analyze individual bacterial trajectories.
Compared wild-type E. coli with a smooth runner mutant.

Main Results:

Observed changes in swimming speed, persistence, and diffusivity with increasing carbomer concentration.
Identified a motility barrier at higher concentrations.
Demonstrated that local mechanical disorder and resistance override run-and-tumble navigation.

Conclusions:

Bacterial exploration in non-Newtonian fluids is significantly influenced by medium properties.
A "medium-assisted" exploration scenario with stop-and-go kinematics was characterized.
Flagellar bundle flexibility is linked to this medium-assisted movement.