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Related Concept Videos

Electromagnetic Fields01:30

Electromagnetic Fields

Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of Gauss's...
Biological Effects of Radiation02:59

Biological Effects of Radiation

All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Applications of EMF Measurements01:26

Applications of EMF Measurements

Electromotive force (EMF) measurements have a broad range of applications in various fields, including chemistry and physics. The electrochemical series, an arrangement of elements in order of their standard electrode potentials, can be determined through EMF measurements. Elements with lower standard potentials can reduce ions of elements with higher standard potentials.The standard cell potential, E°, allows for the calculation of the standard reaction Gibbs energy, ΔG°, and the equilibrium...
Physiological Foundation of Stress01:24

Physiological Foundation of Stress

Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...

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Related Experiment Video

Updated: Jun 25, 2026

Electric and Magnetic Field Devices for Stimulation of Biological Tissues
13:29

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

Electromagnetic fields stress living cells.

Martin Blank1, Reba Goodman

  • 1Department of Physiology, Columbia University, New York, NY, USA.

Pathophysiology : the Official Journal of the International Society for Pathophysiology
|March 10, 2009
PubMed
Summary

Electromagnetic fields (EMF) activate cellular stress responses by interacting with DNA, even at low energy levels. Current safety limits, based on heat, should be updated to biological responses to protect cells from EMF exposure.

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Last Updated: Jun 25, 2026

Electric and Magnetic Field Devices for Stimulation of Biological Tissues
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Published on: May 15, 2021

Finite Element Modelling of a Cellular Electric Microenvironment
08:23

Finite Element Modelling of a Cellular Electric Microenvironment

Published on: May 18, 2021

Area of Science:

  • Cellular biology
  • Biophysics
  • Environmental health

Background:

  • Electromagnetic fields (EMF), including extremely low frequency (ELF) and radio frequency (RF) ranges, are known to influence biological systems.
  • Cellular stress response is a protective mechanism involving stress proteins like HSP70, which aid in protein repair and transport.
  • The exact mechanisms by which EMF interact with cells, particularly at the DNA level, require further elucidation.

Purpose of the Study:

  • To investigate the cellular stress response induced by ELF and RF EMF.
  • To explore the interaction of EMF with DNA and its role in activating stress response pathways.
  • To evaluate the adequacy of current EMF safety standards based on thermal effects.

Main Methods:

  • Analysis of stress response gene expression (HSP70) and stress protein levels (hsp70) following EMF exposure.
  • Investigation of DNA promoter regions responsive to EMF.
  • Utilizing model biochemical systems to study EMF-DNA interactions.

Main Results:

  • Both ELF and RF EMF activate the cellular stress response, inducing HSP70 gene expression and hsp70 protein levels.
  • Specific DNA sequences in the HSP70 promoter are responsive to EMF, suggesting direct interaction.
  • While low-energy EMF induces stress response, higher RF energy can cause DNA strand breaks.

Conclusions:

  • EMF exposure triggers conserved cellular pathways involving DNA, leading to stress responses.
  • Current EMF safety limits based on thermal effects are insufficient.
  • Safety standards should be revised to incorporate non-thermal biological responses, particularly DNA interactions, to ensure cell protection.