Control of Bacterial Cells Growths by Magnetic Hyperthermia

In this work, we report the effectiveness of magnetic hyperthermia as a potential disinfection method against food spoilage microorganisms. High structural-magnetic quality magnetite nanoparticles have been found to be effective against bacterial microorganisms in solution under an oscillating magne...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2013-07, Vol.49 (7), p.3508-3511
Main Authors: Banobre-Lopez, M., Rodrigues, D., Espina, B., Azeredo, J., Rivas, J.
Format: Article
Language:English
Subjects:
Aqueous solutions
Bacterial cells
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fever
Heating
Hyperthermia
Magnetic fields
magnetic hyperthermia
Magnetic resonance imaging
Magnetism
magnetite nanoparticles
Magnetometers
Materials science
Microbiology
Microorganisms
Nanoparticles
Other topics in materials science
Physics
Temperature measurement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, we report the effectiveness of magnetic hyperthermia as a potential disinfection method against food spoilage microorganisms. High structural-magnetic quality magnetite nanoparticles have been found to be effective against bacterial microorganisms in solution under an oscillating magnetic field. Samples containing both magnetite nanoparticles and Pseudomonas fluorescens cells in aqueous solution have been subjected to an alternating magnetic field of chosen amplitude 100 Oe with frequency of 873 kHz for different times, achieving different maximum temperatures ranging from 35°C to 55°C. The subsequent colony forming units count evidenced an important decreasing of the cell survival with temperature in comparison to a conventional direct heating, ending in the total eradication of the microorganisms in relatively short times (~8 min). This ability of magnetic hyperthermia to control bacteria cells constitutes a novel contribution to the finding of new useful applications of hyperthermia different from biomedicine.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2013.2247384