melatonin excretion in cell phone users
Burch and colleagues
report that cell phone use may decrease the output of melatonin
from the pineal gland. They studied male electrical utility workers,
who recorded cell phone use and collected urine samples over a 3-day
period. They found that those with highest cell phone use had the
lowest nocturnal excretion of the major metabolite of melatonin.
The number of participants with high use was small. For a more detailed
summary, see "Research
- Clinical Experiments - Hormone secretion".
Burch JB, Reif JS, Noonan CW, Ichinose T, et al. (2002): Melatonin
metabolite excretion among cellular telephone users Int J Radiat
study suggests RF radiation alters cognitive function
May and September 2000, in May 2001, and in January 2003, we discussed
in "What's New" the effects of RF radiation on brain function
in humans. Another study reports changes in ability to perform tasks
while exposed to RF radiation. The subjects in this experiment were
exposed to 7 Hz-modulated 450 MHz radiation.
For more, see
"Research - Clinical
Experiments - cognitive function".
Lass J, Tuulik V, Ferenets R, Riisalo R, et al. (2002): Effects
of 7 Hz-modulated 450 MHz electromagnetic radiation on human performance
in visual memory tasks. Int J Radiat Biol 78:937-944.
radiation and chromosomal changes
from Israel have reported that exposure of human blood lymphocytes
to RF radiation was associated with alterations in chromosome complement.
The cells were exposed for 72 hours to radiation at a frequency
of 830 MHz. The authors stated that the observed changes indicate
that the radiation might pose a risk for cancer. For more, see "Research
- Toxilogical Experiments - cancer".
Mashevich M, Folkman D, Kesar A, Barbul A, et al. (2003): Exposure
of human peripheral blood lymphocytes to electromagnetic fields
associated with cellular phones leads to chromosomal instability.