Human exposure to fibers in occupational and nonoccupational environments has been a health concern for nearly a century. In this review, selected results from the literature are presented to highlight the availability, limitations, and interpretive difficulties associated with the past and current human fiber exposure data sets. In the traditionally defined asbestos fibers, large amounts of th...

background :although the incidence of animal bite is increasing in iran, there is no sufficient knowledge about delayed post-exposure prophylaxis (pep). hence, the aim of this study was to evaluate delayed pep and its associated factors in bitten people.   methods : this cross-sectional study was conducted in tuyserkan district of hamadan province (west of iran) from february 2011 to february 2...

cryopreservation and sexing of embryos are integrated into commercial embryo transfer technologies. to improve the effectiveness of vitrification of in vitro produced buffalo embryos, two experiments were conducted. the first evaluated the effect of exposure time (2 and 3 min) and developmental stage (morula and blastocysts) on the viability and development of vitrified buffalo embryos. morphol...

introduction: radioactive materials deliver internal radiation dose to patients in nuclear medicine. manual internal radiation dose assessment is a complicated method. introduction of a simple dose calculation software is the main goal of the present study. methods: using the best current data in internal dose calculation (s-factors) recommended by icrp and by considering other technical metho...

effects of oral administration of testosterone and fluoxetine exposure on aggressive behavior of the fighting fish, betta splendens , were investigated. testosterone diluted in ethanol and sprayed on pre-weighted pellet to achieve concentrations of 0, 1, 2 and 4 mg/kg of hormone in food. two main behaviors were recorded: the time in front of mirror and duration of the gill flaring using a mirro...

large volumes of mostly irreparable electronic waste (e-waste) are shipped to africa on a monthly basis, of which nigeria receives the largest share. e-waste management practices in nigeria have remained completely primitive until date; and e-waste workers have little or no occupational safety knowledge and devices. the thousands of chemicals in e-waste have been reported to be toxic to human h...

introduction: lead is one of the most important environmental pollutants due to its vast use in various industries. lead accumulation in different organs, especially the brain, liver and kidneys can cause serious health problems. lead exposure is more dangerous during fetal period and childhood. materials and methods: timed pregnant female rats divided into 6 groups. group 1served as control gr...

conclusions the vitamin d levels of children aged more than 2 years are lower than those of children aged less than 2 years. thus, prescribing vitamin d-containing supplements in children older than 2 years may be beneficial. results the final study consisted of 286 children, 140 males and 146 females, with a mean age of 4.46 ± 2.82 yr. of these, 218 (76.22%) children, with a mean age of 5.09 ±...

background and purpose: today, one of the major health problems worldwide is cancer. several factors are involved in cancer incidence; however, the role of environmental factors is more prominent. modifying these factors and changing them into proper behavior can have a fundamental role in preventing cancer. accordingly, this study was conducted to evaluate the exposure to carcinogenic agents i...

purpose: to describe a case with a rare complication of posterior chamber intraocular lens (pc-iol) implantation in a patient who had undergone extracapsular cataract extraction (ecce) two years before case report: a 80-year-old diabetic woman presented with an exposed pc-iol in her left eye with a history of mechanical trauma. slit-lamp examination revealed an extruded pc-iol lied on the anter...