introduction natural and artificial radionuclides are the main sources of human radiation exposure, which enter the food chain from the environment. radionuclides can affect human health by transferring from soil to plants and entering the human body. in this research study, we aimed to determine the activity concentrations of radionuclides and calculate the average annual committed effective d...

the presence of radon in drinking water causes health risks associated with exposure from both inhalation and ingestion. since the studies show that faults near the water resources have a critical effect on the concentration of radon, kouhbanan active fault zone, to find water resources  with high radon concentration was chosen for the following investigation. water samples were taken from all ...

background: many radioactive compounds may be released into the environment and hence into the drinking water supplies due to the human activities. radionuclides can also enter the food chain if the contaminated water is used for drinking or irrigation purposes. objective: to estimate the annual effective dose of natural radioactive materials like 226ra and 40k in drinking water of wells in zan...

background: measurement of background radiation is very important from different points of view especially for human health. the aim of this survey was focused on determining the current background radiation in one of the highest altitude regions ( zagros mountains ), chaharmahal and bakhtiari province, in the south west of iran . materials and methods: the outdoors-environmental monitoring exp...

abstractbackground: 226 ra and 228 ra contents in foodstuffs of ramsar which is a coastal city in the northern part of iran were determined by gamma spectrometry. measurement results together with food consumption rates were used to estimate annual effective dose from  226 ra and 228 ra, due to consumption of food stuffs by inhabitants of ramsar city.materials and methods: a total of 33 samples...

background: health hazards associated with exposure due to the natural radioactivity which is a part of our physical environment are of great concern. in order to assess the risks associated with exposure due to the natural radioactivity in soil and building materials, extensive studies have been carried out all over the world. the most commonly encountered radionuclide’s are 238u, 232th, their...

The pressurised Metered Dose Inhaler (pMDI) has become the most prescribed drug delivery system for treating the respiratory diseases. However, the spray generation mechanism of these devices has not been extensively researched and there is very little information regarding the two-phase fluid dynamics associated with pre-atomisation inside the valve stem. The aim of the work presented in this ...