vibration from the operation of industrial implements can be harmful to the human body. these implements, such as the power tiller or hand tractor often used to till rice in northern iran, can vibrate the entire body or one part, particularly the hands. in this research, the transmissibility and effects of vibration from a mitsubishi power tiller of 7.7 hp and 2400 rpm on the operator’s health ...

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 ...

UV radiation exposure increases skin cancer risk. A substantial portion of a person's UV exposure occurs before the age of 18 years. We sought to determine UVB radiation exposure levels in high-school students during normal daily activity. Digital dosimeters were worn by 4 high-school students during 11 school days. Students were subjected to daily erythemal and suberythemal doses of UVB radiat...

Pig farmers are exposed to organic material in pig barns on a daily basis and have signs of an ongoing chronic airway inflammation and increased prevalence of chronic inflammatory airway diseases, predominantly chronic bronchitis. Interestingly, the inflammatory response to acute exposure to organic dust is attenuated in farmers. The aim of the study was to closer characterize innate immunity f...