6533b86efe1ef96bd12cbdc5
RESEARCH PRODUCT
No effects of pulsed radio frequency electromagnetic fields on melatonin, cortisol, and selected markers of the immune system in man.
D.-m. RoseK. RadonLutz VollrathD. PareraDetlev Jungsubject
Electromagnetic fieldAdultMalemedicine.medical_specialtyTime FactorsHydrocortisonePhysiologyRadio WavesBiophysicsAudiologyNeopterinDouble blindMelatoninchemistry.chemical_compoundImmune systemElectromagnetic FieldsReference ValuesInternal medicineMedicineHumansRadiology Nuclear Medicine and imagingCircadian rhythmSalivaMelatoninbusiness.industryNeopterinGeneral MedicineCircadian RhythmImmunoglobulin AEndocrinologychemistryRadio frequencybusinessBiomarkersRadio wavemedicine.drugdescription
There is growing public concern that radio frequency electromagnetic fields may have adverse biological effects. In the present study eight healthy male students were tested to see whether or not radio frequency electromagnetic fields as used in modern digital wireless telecommunication (GSM standard) have noticeable effects on salivary melatonin, cortisol, neopterin, and immunoglobulin A (sIgA) levels during and several hours after exposure. In a specifically designed, shielded experimental chamber, the circularly polarized electromagnetic field applied was transmitted by an antenna positioned 10 cm behind the head of upright sitting test persons. The carrier frequency of 900 MHz was pulsed with 217 Hz (average power flux density 1 W/m2). In double blind trials, each test person underwent a total of 20 randomly allotted 4 hour periods of exposure and sham exposure, equally distributed at day and night. The results obtained show that the salivary concentrations of melatonin, cortisol, neopterin and sIgA did not differ significantly between exposure and sham exposure.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-04-12 | Bioelectromagnetics |