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

Magnetic Fields01:27

Magnetic Fields

7.0K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
7.0K
Compass01:23

Compass

4.1K
The compass is a fundamental instrument that operates by aligning its magnetic needle with Earth's magnetic field. This alignment facilitates navigation and orientation, offering a means to determine direction relative to magnetic north. However, the magnetic needle points to magnetic north, which differs slightly from true geographic north due to magnetic declination, which is the angular deviation between these two points. Declination varies based on geographic location and shifts over time...
4.1K
Magnetic Force01:18

Magnetic Force

1.7K
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
1.7K
Magnetism01:30

Magnetism

7.9K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
7.9K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.1K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
6.1K
Magnetic Vector Potential01:15

Magnetic Vector Potential

1.4K
In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
1.4K

You might also read

Related Articles

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

Sort by
Same author

Effects of varying intensities of heat stress on neuropeptide Y and proopiomelanocortin mRNA expression in rats.

Biomedical reports·2020
Same author

Optically Controlled Living Micromotors for the Manipulation and Disruption of Biological Targets.

Nano letters·2020
Same author

Quinetides: diverse posttranslational modified peptides of ribonuclease-like storage protein from <i>Panax quinquefolius</i> as markers for differentiating ginseng species.

Journal of ginseng research·2020
Same author

Psychological status of the staff in a general hospital during the outbreak of coronavirus disease 2019 and its influential factors.

Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences·2020
Same author

Influence of anaerobic digestion on the labile phosphorus in pig, chicken, and dairy manure.

The Science of the total environment·2020
Same author

Asthma exacerbations on benralizumab are largely non-eosinophilic.

Allergy·2020
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: Dec 24, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K

Magnetic Noise Enabled Biocompass.

Da-Wu Xiao1, Wen-Hui Hu1, Yunfeng Cai2

  • 1Beijing Computational Science Research Center, Beijing 100193, China.

Physical Review Letters
|April 14, 2020
PubMed
Summary
This summary is machine-generated.

Magnetic proteins enable biological compasses through magnetic fluctuations, not permanent magnetism. This research clarifies the molecular mechanism behind geomagnetic field sensing in organisms.

More Related Videos

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
14:42

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Published on: May 2, 2014

9.5K
Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
09:13

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures

Published on: April 21, 2013

28.4K

Related Experiment Videos

Last Updated: Dec 24, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K
Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
14:42

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Published on: May 2, 2014

9.5K
Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
09:13

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures

Published on: April 21, 2013

28.4K

Area of Science:

  • Biophysics
  • Quantum Biology
  • Molecular Magnetism

Background:

  • The discovery of magnetic proteins offers insights into molecular-level biological compasses.
  • The exact mechanism of magnetic protein function in biocompasses remains debated due to the lack of permanent magnetism at room temperature.

Purpose of the Study:

  • To propose a microscopic mechanism for biocompass operation in magnetic proteins, addressing the absence of permanent magnetism.
  • To explain how magnetic proteins enable geomagnetic field sensing within biological environments.

Main Methods:

  • Utilizing a widely accepted radical pair model for biocompasses.
  • Analyzing the quantum dynamics of a proposed microscopic model based on magnetic protein structure.
  • Investigating magnetic fluctuations as the key to geomagnetic field sensing.

Main Results:

  • A microscopic mechanism is proposed where magnetic fluctuations, not permanent magnetism, enable biocompass function.
  • The study demonstrates that magnetic protein structure facilitates geomagnetic field sensing via magnetic fluctuations.
  • Analysis reveals conditions necessary for optimal sensitivity in magnetic protein-based biocompasses.

Conclusions:

  • Magnetic protein-mediated biocompasses operate through magnetic fluctuations, resolving the debate around permanent magnetism.
  • The proposed mechanism clarifies how organisms sense geomagnetic fields at a molecular level.
  • This work provides a foundation for understanding quantum effects in biological magnetic sensing.