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 Concept Videos

Gravitation01:16

Gravitation

8.7K
In the years before Newton, a general belief prevailed that different laws governed objects in the sky than objects on Earth. When Kepler wrote down the three laws of planetary motion, explaining in detail the geometrical properties of the planetary orbits around the Sun, there was no immediate idea to discern their connection with more fundamental laws. It was Isaac Newton who, in 1665–66, figured out the connection between planetary motion, the motion of the moon around the Earth, and...
8.7K
Binary Fission01:26

Binary Fission

2.6K
Binary fission is the primary mode of asexual reproduction in prokaryotes, such as bacteria. It results in the production of two genetically identical daughter cells. This highly efficient process ensures the rapid propagation of bacterial populations under favorable conditions and involves coordinated cellular and molecular events.DNA Replication and SeparationThe process begins with the replication of the bacterial chromosome. The circular DNA molecule unwinds at a specific origin of...
2.6K
Binary Fission01:20

Binary Fission

63.0K
Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
63.0K
Microtubule Instability02:17

Microtubule Instability

6.1K
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
6.1K
Gravitational Potential Energy01:14

Gravitational Potential Energy

25.6K
Potential energy is not just a property of each object, but also a property of the interactions between objects in a chosen system. For each type of interaction present in a system, there is a corresponding type of potential energy. The total potential energy of the system is the sum of the potential energies of all the objects. Potential energy can be classified into two major categories: gravitational potential energy and elastic potential energy. The potential energy associated with a...
25.6K
Newton's Law of Gravitation01:15

Newton's Law of Gravitation

16.9K
Our everyday observation tells us that all objects close to the Earth naturally tend to fall to the ground. Early philosophers assumed that this downward force was unique to Earth. By the 16th century, Nicolaus Copernicus (1473-1543) put forward the heliocentric theory, which suggested that Earth and other planets orbited the sun, while the Moon orbited the Earth. However, it was Isaac Newton (1642-1727) who linked these two motions together in the 17th century. He reasoned that the force of...
16.9K

You might also read

Related Articles

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

Sort by
Same author

The Role of Zn-Hf Site Proximity and Oxygen Vacancies for Methanol Formation Over ZnHfO<sub>x</sub> Catalysts Under CO<sub>2</sub> Hydrogenation Conditions.

Angewandte Chemie (International ed. in English)·2026
Same author

Circular and athermal atmospheric CO<sub>2</sub> capture by food waste-derived amyloid sorbents.

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

The sinking dynamics of a solid intruder in concentrated cornstarch suspensions studied using ultra-fast magnetic resonance imaging.

Soft matter·2026
Same author

Core-shell particles with tailored magnetic susceptibility for signal-efficient magnetic resonance imaging of granular systems.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same author

Dopant-controlled oxygen vacancy dynamics define CO<sub>2</sub>-to-methanol catalysis on In<sub>2</sub>O<sub>3</sub>.

Nature communications·2026
Same author

Silicon and Low Pt Loading Improves Redox Dynamics and Regenerability in PtGa Propane Dehydrogenation Catalysts.

Journal of the American Chemical Society·2026

Related Experiment Video

Updated: Jan 26, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

10.0K

Gravitational instabilities in binary granular materials.

Christopher P McLaren1, Thomas M Kovar2, Alexander Penn1,3

  • 1Department of Mechanical and Process Engineering, ETH Zürich, 8092 Zürich, Switzerland.

Proceedings of the National Academy of Sciences of the United States of America
|April 24, 2019
PubMed
Summary

Scientists discovered new gravitational instabilities in granular mixtures, driven by gas flow. These phenomena, unlike liquid behavior, offer novel ways to pattern granular materials.

Keywords:
fluidizationgranular materialinstabilities

More Related Videos

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
09:00

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography

Published on: September 29, 2019

13.8K
Fragmenting Bulk Hydrogels and Processing into Granular Hydrogels for Biomedical Applications
10:18

Fragmenting Bulk Hydrogels and Processing into Granular Hydrogels for Biomedical Applications

Published on: May 17, 2022

6.7K

Related Experiment Videos

Last Updated: Jan 26, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

10.0K
Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
09:00

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography

Published on: September 29, 2019

13.8K
Fragmenting Bulk Hydrogels and Processing into Granular Hydrogels for Biomedical Applications
10:18

Fragmenting Bulk Hydrogels and Processing into Granular Hydrogels for Biomedical Applications

Published on: May 17, 2022

6.7K

Area of Science:

  • Physics
  • Materials Science
  • Geophysics

Background:

  • Granular media exhibit liquid-like behaviors in natural and technological settings.
  • Understanding granular dynamics is crucial for applications like pharmaceuticals and carbon capture.

Purpose of the Study:

  • To discover and characterize novel gravitational instabilities in granular particle mixtures.
  • To elucidate the underlying physical mechanisms driving these instabilities.

Main Methods:

  • Subjecting granular particle mixtures to vertical vibration and upward gas flow.
  • Observing and analyzing the resulting particle motion and instability formation.

Main Results:

  • Discovery of a Rayleigh-Taylor (RT)-like instability where lighter grains rise through heavier grains.
  • Identification of gas channeling as the key mechanism, distinct from liquid instabilities.
  • Observation of other instabilities like rising granular bubbles and branching droplets.

Conclusions:

  • The discovered instabilities are driven by a unique interplay of gas drag and contact forces.
  • These findings reveal new possibilities for controlled patterning and manipulation of granular mixtures.