Studies of gross alpha and beta activity in road- surface-deposited sediments were conducted three Russian cities different geographical zones. To perform radiation measurements, new methods applied which allow dealing with low mass volume dust-sized (2–100 ?m) samples obtained after the size fractionation procedure. The 2–10 ?m fraction had highest concentration (GB)—1.32 Bq/g Nizhny Novgorod ...

OBJECTIVE In this single-subject study, we evaluated the short-term effects of gross motor activity on the attention behavior of three adults with brain injury. Additionally, observation data were collected on each subject's performance. METHOD The effects of gross motor activity on the subjects' attention behavior was measured by performance on visual letter cancellation tasks. The three sub...

The wide adoption of underground mining has contributed immensely to the rapid growth of the countries’ economy, job creation, gross domestic product, fixed capital formation, gross investment and merchandise exports on an enormous global scale. At the same time, the tedious and dangerous nature of underground mining makes it vulnerable to mine accidents and disasters, such as the fall of loose...

among various types of cities, mining cities have special features including a high concentration of industrial activities associated with the exploration, extraction, refining, processing and export of groundwater resources, the risk of reduction and termination of non-renewable resources, high degree of environmental pollution, high production of domestic and industrial waste and social issue...

Measurement of gross alpha, gross beta activities and cosmogenic beryllium-7 (7Be) concentrations were made both daily and weekly during the years 2001--2004 from samples of atmospheric aerosols filtered from the air at Tehran Nuclear Research Center (35 41' N) and Zahedan (28 29' N). Weekly aerosol samples collected with the high-volume air samplers on cellulose filters were used to determine ...

Elevated atmospheric carbon dioxide concentrations [CO2] is projected to increase forest production, which could increase ecosystem carbon (C) storage. This study contributes to our broad goal of understanding the causes and consequences of increased fine-root production and mortality under elevated [CO2] by examining potential gross nitrogen (N) cycling rates throughout the soil profile. Our s...

Uranium is a regulated contaminant (maximum level [MCL] 30 μg/L) that contributes to the gross alpha activity of groundwater. The adjusted (MCL 15 pCi/L) determined by subtracting total uranium from measured activity. U.S. water utilities can use mass-based and radiochemical analysis methods for compliance monitoring uranium. Mass-based measurements conversion factor 0.67 pCi/μg calculate This ...