Related Experiment Video
Updated: Jun 5, 2026

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count
Published on: July 11, 2012
Low intensity electromagnetic irradiation with 70.6 and 73 GHz frequencies affects Escherichia coli growth and
Heghine Torgomyan1, Vitaly Kalantaryan, Armen Trchounian
1Department of Biophysics of Biology Faculty, Yerevan State University, 0025 Yerevan, Armenia.
Abstract:
The low intensity electromagnetic irradiation (EMI) of the 70.6 and 73 GHz frequency is resonant for Escherichia coli but not for water. In this study, E. coli irradiation with this EMI during 1 h directly and in bi-distilled water or in the assay buffer with those frequencies resulted with noticeable changes in bacterial growth parameters. Furthermore, after EMI, 2 h rest of bacteria renewed their growth in 1.2-fold, but repeated EMI--had no significant action. Moreover, water absorbance, pH, and electric conductance were changed markedly after such irradiation. The results point out that EMI of the 70.6 and 73 GHz frequency can interact with bacteria affecting growth and in the same time with the surrounding medium (water) as well.
Related Concept Videos
Stringent Response in E. coli
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
Bacterial Gastroenteritis
Biological Effects of Radiation
Physical Methods for Controlling Microbial Growth: Temperature
