Study type: Medical/biological study (experimental study)

Effects of differently polarized microwave radiation on the microscopic structure of the nuclei in human fibroblasts. med./bio.

Published in: J Zhejiang Univ Sci B 2010; 11 (10): 801-805

Aim of study (acc. to author)

To study the influence of microwave irradiation on the human fibroblast nuclei, the effects of three variants of electromagnetic wave polarization (linear, left-handed and right-handed elliptically polarized) were examined.

Background/further details

The mean heterochromatin granule quantity was calculated for 30 nuclei and each experiment was repeated three times.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 36.65 GHz
Exposure duration: continuous for 10 s
Exposure 2: 36.65 GHz
Exposure duration: continuous for 10 s
left-handed and right-handed elliptically polarized field

Exposure 1

Main characteristics
Frequency 36.65 GHz
Type
Polarization
Exposure duration continuous for 10 s
Additional info linear polarized field
Exposure setup
Exposure source
  • self-developed semi-conductor device
Setup human fibroblasts growing in a monolayer on a cover slide, covered by 1 mm of culture medium during exposure
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power density 1 µW/cm² - - - at the surface of the exposed object
power density 10 µW/cm² - - - at the surface of the exposed object
power density 30 µW/cm² - - - at the surface of the exposed object
power density 100 µW/cm² - - - at the surface of the exposed object

Exposure 2

Main characteristics
Frequency 36.65 GHz
Type
Polarization
  • elliptical
Exposure duration continuous for 10 s
Additional info left-handed and right-handed elliptically polarized field
Exposure setup
Exposure source
  • self-developed semi-conductor device + grating polarizer
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power density 1 µW/cm² - - - at the surface of the exposed object
power density 10 µW/cm² - - - at the surface of the exposed object
power density 30 µW/cm² - - - at the surface of the exposed object
power density 100 µW/cm² - - - at the surface of the exposed object

Reference articles

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Microwave irradiation at the intensity of 1 µW/cm² produced no effect, but exposure at the intensities of 10 and 100 µW/cm² induced an increase in heterochromatin granule quantity. More intense irradiation induced more chromatin condensation. The right-handed elliptically polarized irradiation revealed more biological activity than the left-handed polarized one.
As the left-handed elliptically polarized microwaves induced less heterochromatinization, they should be preferred for the use in various systems of radio communications.

Study character:

Study funded by

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