Due to a lack of financial resources, we unfortunately have to suspend the import of any new radio frequency and mobile phone-related articles as of now (November 27, 2017). We apologize for this inconvenience and will keep you informed.

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Medical/biological study (experimental study)

A preliminary study on ultra high frequency electromagnetic fields effect on black locust chlorophylls.

Published in: Acta Biol Hung 2005; 56 (1-2): 109-117

Aim of study (acc. to author)

To study quantitatively chlorophylls in the leaves of black locust seedlings exposed to electromagnetic fields of high frequency.



Exposure Parameters
Exposure 1: 400 MHz
Modulation type: CW
Exposure duration: repeated daily exposure of 1, 2, 3 and 8 hours for 3 weeks
Exposure 1
Main characteristics
Frequency 400 MHz
  • guided field
Exposure duration repeated daily exposure of 1, 2, 3 and 8 hours for 3 weeks
Modulation type CW
Exposure setup
Exposure source
Measurand Value Type Method Mass Remarks
power 2 W - - - -
electric field strength 60 V/m - calculated - -
Reference articles
Exposed system:
  • plant
  • black locust (Robinia pseudoacacia L.)
  • whole body

Methods Endpoint/measurement parameters/methodology

Investigated material:
  • isolated bio./chem. substance
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Chlorophyll-a as well as chlorophyll-b level was decreased except the exposure time of two hours, where a considerable enhancement was noticed. It was revealed that the ratio of the two chlorophylls was decreasing logarithmically to the increase of daily exposure time.
Study character:

Study funded by

  • not stated/no funding

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