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Showing 2 results for Semen
Dr. F. Bouzarjomehri, M.h. Ehrampoosh,
Volume 6, Issue 3 (12-2008)
Abstract
Background: Indoor radon gas (222Rn) has been recognized as one of the health hazards for human. Air radon comes mainly from basement soil and construction materials. Saghand region with rich uranium mines lies 180 km from Yazd, so the indoor radon concentration can be high. Yazd, with population of about 457000, is the biggest city near Saghand, thus, indoor gamma background radiation of Yazd could be more than the other cities of Yazd province. Materials and Methods: In this study the air radon level of 84 dwellings basement from various regions of Yazd were measured during the year 2007. To do so, a portable radon gas surveyor was used which is an active measurement method. Using this device, α radiation of each basement was measured by a solid state detector for 24 hours. Results: Radon concentrations of the basements were between 5.55 to 747.4 Bq/m3 with mean of 137.36 Bq/m3. The mean radon concentration wasn't significantly different from the EPA guide line that is mitigation recommendations level (148 Bq/m3). However, more than 30% of the basements had radon concentration more than EPA guide line. Conclusion: Using good air conditioning system in the dwelling basements is suggested. Iran. J. Radiat. Res., 2008 6 (3): 141-144
S.a. Falahati, M. Anvari, M.a. Khalili,
Volume 9, Issue 3 (12-2011)
Abstract
Background: In previous investigations, it has
been clarified that electromagnetic fields (ELF) can
cause some changes in cellular behavior. The aim of
this prospective study was to investigate the effect of
magnetic field (MF) on human sperm parameters of
motility, morphology, and viability. Materials and
Methods: Semen samples were collected from 12
fertile men, and were allowed to liquefy for 15-30
min. Each sample was then divided into two aliquots.
The experimental samples were placed in the ELF,
while the control one was left intact. The applied
fields were pulsed with distance of 6 m/ sec and
effective intensity of 1mT and different frequencies of
10, 25 and 45 Hz at different time intervals. The
constant field intensity was 1mT in all experiments.
Results: In frequency of 10Hz, an increase in quick
motility of sperm (1.8 times) occurred after 4h
however, slow motility was decreased by 40% after
2h. Also, the quick motility increased by 1.6 times in
frequency 25 Hz after 4 h, while the MF had no effect
on other sperm parameters. MF had no effect on any
of sperm parameters in frequency of 40 Hz in 4 h.
The stimulation ratio on the sperm viability was only
significant at frequency of 10 Hz after 2 h after
incubation. The sperm morphology was not
influenced in any of the fields. Conclusion: This study
reports the existence of certain frequency windows
for the resonance of the effects of the MF on human
spermatozoa. Rapid motility was significantly affected
by the exposure of spermatozoa to MF, but sperm
structural parameter had remained intact. Iran. J.
Radiat. Res., 2011 9(3): 195-200
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