Study type: Medical/biological study (experimental study)

Microwave Irradiation and the Circadian Rhythm of Bone Marrow Cell Mitosis med./bio.

By: Czerski P
Published in: J Microw Power 1974; 9 (1): 31-37
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Aim of study (acc. to author)

To study if microwave irradiation effects changes of the mitotic index in femoral bone marrow cells of mice.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 2.95 GHz
Modulation type: pulsed
Exposure duration: continuous for 4 hrs

Exposure 1

Main characteristics
Frequency 2.95 GHz
Charakteristic
Polarization
Exposure duration continuous for 4 hrs
Additional info Vertical polarization
Modulation
Modulation type pulsed
Pulse width 1 µs
Repetition frequency 1,200 Hz
Exposure setup
Exposure source
Setup Animals exposed in plastic (vinidur) cages
Sham exposure A sham exposure was conducted.
Additional info 54 animals were exposed and same number were sham exposed between 8 am and 12 am and another two groups, each consisting of 54 animals were exposed and sham exposed between 8 pm and 12 pm .
Parameters
Measurand Value Type Method Mass Remarks
power density 50 nW/cm² mean cf. remarks - +/- 0.2 mW/m²

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The obtained femoral bone marrow cells were loosely designated only by morphological criteria and classified into three groups: a) granulocyte precursor cells, b) erythroblastic cell lines, and c) "stem cells" which includes early erythroblasts, myclobasts*, and lymphocytes. Only the latter group may be affected by microwave irradiation, as indicated by an increased mitotic index. (* remark by evaluator: the study mentioned mycloblasts and myclobasts. There are no such cells.)

Study character:

Study funded by