the new scientific innovation of engineering nanoparticles (nps) at the atomic scale (diameter

background: mercury is widespread and persistent in the environment. one organic form of mercury, methylmercury (mehg), can accumulate in the food chain in aquatic ecosystems and lead to high concentrations of mehg in fish, which, when consumed by humans, can result in an increased risk of adverse effects. currently, the joint fao/who expert committee on food additives (jecfa) has established p...

purpose: to evaluate exposure rate following wrapping hydroxyapatite implant in mersilene mesh and donor sclera. methods: in a prospective comparative interventional case-series 60 consecutive patients underwent primary hydroxyapatite orbital implant wrapped in mersilene mesh or donor sclera. results: thirty patients (21 male and 10 female) underwent implantation with mersilene mesh and 30 pati...

abstract background: occupational exposure studies indicate that formaldehyde exposure causes temporary and consistent effects on industrial workers exposed to formalin. case: the case was a 36-year-old man who had developed intravascular hemolytic anemia caused by formalin after inhalation exposure. formalin is a clear solution of 37% formaldehyde in water. the primary route of exposure to for...

noise is one of the major hazardous occupational exposures and one of the occupations at risk is the transportation industry. however, few studies have measured and reported the amount of noise exposure in drivers. in this study, we evaluated noise exposure among the public transportation bus drivers of one major iranian city, kerman, southeast iran. eighty public transportation buses in the st...

sun light accompany with rest and fresh air is beneficial for maintenance of health. although scientific and laboratory witnesses have shown the relationship between light exposure and mental health, the live experience of pleasure feeling of sunlight is far more than what is accepted by experimental and observational researches. patient with affective disorders have been treated by increasing ...

introduction: early clinical exposure has been conceptualized to orient medical students towards actual clinical scenario and help them correlate their theoretical knowledge with real life situations in early years of mbbs courses. in the present study we explored the outcome of early clinical exposure in the context of basic science topics (physiology) in fresh mbbs entrants and compared their...

vitamin d is essential for growth and vitamin d deficiency is important issue in adolescent girls as they have a limited rapid growth period .this cross sectional study was done on 167 female students in secondary guidance school in 2006. growth parameters, taking supplementary vitamin d, using sunscreen creams and the type of housing and their avoidance from exposure to sunlight was recorded. ...

background and objectives: day-shift taxi drivers have a long duration of direct sun exposure. however, the efficiency of this occupational exposure in vitamin d synthesis has not been addressed yet. the aim of this study was to assess the vitamin d status of taxi drivers in tehran, and examine vitamin d status association with some anthropometric and circulating biomarkers. materials and metho...

in recent years, biotechnology has provided the possibility of creating genetically modified (gm) organisms by transferring genes from sources such as viruses, bacteria, animals, and plants into usually unrelated species. this ability to overcome insurmountable physiological barriers by exchanging genetic materials among all living organisms is a double-edged sword. on the one hand, it allows t...