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Related Concept Videos

Other Unique Bacteria01:18

Other Unique Bacteria

499
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
499

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Related Experiment Video

Updated: Feb 23, 2026

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
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Respiring cellular nano-magnets.

Ayesha Talib1, Zanib Khan2, Habib Bokhari1

  • 1Department of Biosciences, COMSATS Institute of Information Technology, Park Road, Tarlai Kalan, 45550 Islamabad, Pakistan.

Materials Science & Engineering. C, Materials for Biological Applications
|September 4, 2017
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Researchers discovered a novel aerobic bacterium capable of synthesizing magnetite nanoparticles. This bio-nano-magnet offers a green approach for producing magnetic nanoparticles for industrial and medical applications.

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Area of Science:

  • Biotechnology
  • Nanotechnology
  • Microbiology

Background:

  • Magnetotactic bacteria synthesize magnetic nanoparticles via biologically controlled mineralization.
  • These nanoparticles exhibit unique magnetic properties and nanostructures.

Purpose of the Study:

  • To isolate and characterize a novel aerobic bacterial strain capable of synthesizing magnetic nanoparticles.
  • To explore its potential for green synthesis of magnetic nanomaterials.

Main Methods:

  • Isolation of bacteria from oil refinery sludge.
  • Microscopic and staining analysis for bacterial characterization.
  • Magnetometry and X-ray diffraction for magnetic property and nanoparticle analysis.

Main Results:

  • A novel gram-positive aerobic rod strain was identified.
  • The bacteria thrive in acidic conditions (pH ~3.2) with Fe2+ ions.
  • Cellular biosynthesis of magnetite (Fe3O4) nanoparticles was confirmed.

Conclusions:

  • The novel bacterium is a promising source for green synthesis of magnetic nanoparticles.
  • Potential applications include MRI, magnetic hyperthermia, and ferrofluids.