The radioactivity in tobacco leaves collected from 15 different regions of Greece and before cigarette production was studied in order to find out any association between the root uptake of radionuclides from soil ground by the tobacco plants and the effective dose induced to smokers from cigarette tobacco due to the naturally occurring primordial radionuclides , such as 226Ra and 210Pb of the ...

The present study was carried out to determine the activity concentrations of 40K, 226Ra and 232Th in surface soil samples collected from twenty five different locations of Industrial Yanbu city located in western region of Saudi Arabia, using a NaI(Tl) gamma-ray spectrometer. The activity concentrations of 226Ra, 232Th and 40K in the soil samples from the studied area ranged from 25.21 Bq kg t...

The residence time of fluids circulating through deep-sea hydrothermal systems influences the extent water-rock reactions and flux major minor elements to ocean. While fluid times in numerous basaltic gabbroic have been determined, those less studied ultramafic are currently unknown. Fluids that interact with mantle rocks fundamentally different chemistries therefore unique on seawater chemistr...

Tobacco samples were collected from different tobacco markets Antalya in Turkey. To calculate natural radionuclides activity concentration, counted for 86400 seconds by using high purity germanium (HPGe) detector. Activity concentrations of 226Ra, 232Th and 40K found higher than minimum detectable (MDA). 137Cs was not detected any sample. concentration range 83±15 Bqkg-1 to 325±45 Bqkg-1, 29±5 ...

This analysis of 238U, 226Ra and 210Pb transfer factors from the soil to leaves different native broadleaf trees at sites previously modified by uranium presence site background radioactivity levels, was conducted using data a few available studies literature. The tree species Quercus ilex, suber, Eucalyptus camaldulensis, pyrenaica, ilex rotundifolia, Populus sp. botryoides Sm. affected Tilia ...

Rice (Oryza sativa) is an important source of human internal exposure to radionuclides and heavy metals because, worldwide, a large fraction the population consume rice as their daily basic diet. In this study, levels correlation natural radioactivity (232Th, 226Ra 40K) (Pb, Ni Cd) in local sold Enugu urban markets, southeastern part Nigeria, were examined. Possible health implications also eva...

Nkamouna-Kongo is a cobalt–nickel deposit located in Lomié, Eastern Cameroon. Mining creates radiation exposure pathways that must be considered risk management scenarios. RESRAD-ONSITE and RESRAD-BIOTA, developed by the US DOE, assess contaminated sites deriving cleanup criteria estimating dose associated with residual radioactive materials using site-specific parameters. This paper evaluated ...

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...