Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.
Exposure of Bacteria to 2450 MHz Microwave Radiation
No Effects Found
P. E. Hamrick, B. T. Butler · 1973
High-intensity 2450 MHz microwave radiation showed no direct effects on bacterial growth beyond temperature changes.
Plain English Summary
Summary written for general audiences
Researchers exposed bacteria (E. coli and Pseudomonas) to 2450 MHz microwave radiation at 60 mW/cm² for 12 hours to study effects on growth. They found no impact on bacterial reproduction rates beyond what could be explained by temperature changes. This suggests microwave radiation at this frequency may not directly disrupt cellular processes in these microorganisms.
Cite This Study
P. E. Hamrick, B. T. Butler (1973). Exposure of Bacteria to 2450 MHz Microwave Radiation.
Show BibTeX
@article{exposure_of_bacteria_to_2450_mhz_microwave_radiation_g3588,
author = {P. E. Hamrick and B. T. Butler},
title = {Exposure of Bacteria to 2450 MHz Microwave Radiation},
year = {1973},
doi = {10.1080/00222739.1973.11688881},
}Quick Questions About This Study
No, this study found that 12 hours of 2450 MHz exposure at 60 mW/cm² did not affect bacterial reproduction rates beyond temperature effects. The microwave radiation did not directly damage or kill the E. coli and Pseudomonas bacteria tested.
The 60 mW/cm² intensity used is extremely high compared to everyday exposures. For context, this is thousands of times stronger than typical cell phone radiation levels and approaches the power density inside microwave ovens.
Yes, both E. coli and Pseudomonas bacteria maintained normal growth patterns during 12 hours of continuous 2450 MHz exposure. Their reproduction rates were unchanged compared to unexposed control bacteria throughout the entire exposure period.
Household microwave ovens operate at exactly the same 2450 MHz frequency tested in this study. However, ovens use much higher power levels (typically 700-1000 watts) concentrated in an enclosed chamber for heating food.
In this bacterial study, yes. Researchers found that any observed effects could be fully explained by temperature variations, suggesting no direct non-thermal biological impact from 2450 MHz radiation on these microorganisms at the tested intensity.