Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Evolution of bioconvective patterns in variable gravity

D A Noever1

  • 1Universities Space Research Association, NASA Marshall Space Flight Center, Huntsville, Alabama 35812, USA.

Physical Review. A, General Physics
|October 15, 1991
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

The effects of variable biome distribution on global climate.

Bio Systems·1996
Same author

Preferred negative geotactic orientation in mobile cells: Tetrahymena results.

Biophysical journal·1994
Same author

Computerized in vitro test for chemical toxicity based on Tetrahymena swimming patterns.

Chemosphere·1994
Same journal

Erratum: 1/f noise in the radioactive beta - decay of 204Tl

Physical review. A, General physics·1989
Same journal

High Rydberg states of helium hydride.

Physical review. A, General physics·1989
Same journal

Monte Carlo renormalization group with evolution in the space of parameters.

Physical review. A, General physics·1989
Same journal

Transient structures in the Fréedericksz transition.

Physical review. A, General physics·1989
Same journal

Glass transition, competing energy, and the tiling model.

Physical review. A, General physics·1989
Same journal

Flow of a surfactant across a thin liquid film wetting a solid substrate.

Physical review. A, General physics·1989
See all related articles

Bioconvection patterns in dense microorganism cultures maintain statistical properties, like Aboav

Area of Science:

  • Biophysics
  • Fluid Dynamics
  • Microbiology

Background:

  • Bioconvection, the collective movement of microorganisms, forms complex patterns.
  • Understanding these patterns is crucial for fields ranging from ecology to industrial processes.
  • Previous studies have explored pattern formation under constant gravity.

Purpose of the Study:

  • To investigate the impact of varying gravitational forces on bioconvective pattern evolution.
  • To analyze the statistical properties of these patterns under altered gravity conditions.
  • To compare microorganism pattern formation with other natural and simulated foam-like structures.

Main Methods:

  • Experiments were conducted on shallow, dense cultures of microorganisms.
  • Gravity was varied between 1g and 1.8g (where g = 9.8 m s-1).

Related Experiment Videos

  • Statistical properties of the resulting quasi-two-dimensional patterns were measured and analyzed.

    • Main Results:

    • Bioconvective patterns consistently obeyed Aboav's law.
    • Average vertex angles aligned with predictions for regular polygons.
    • Pattern area showed a linear relationship with the number of sides, even with increased polygon counts and reduced dimensions under higher gravity.

    Conclusions:

    • The statistical regularity of bioconvective patterns is robust across a range of gravitational forces.
    • Microorganism bioconvection shares fundamental structural similarities with other complex systems like foams and grain structures.
    • These findings provide insights into pattern formation principles in dynamic environments.