نتایج جستجو برای: atmospheric radioactivity
تعداد نتایج: 87968 فیلتر نتایج به سال:
We performed a detailed modelling of the background counts observed in phoswich scintillator X-ray detector at balloon altitude, used for astronomical observations, on board small scientific balloon. Monte Carlo simulation technique Geant4 environment, to estimate from various plausible sources. High energy particles and radiation generated interaction Galactic Cosmic Rays with atmospheric nucl...
Radioactive carbon has been routinely determined in this laboratory by gas phase proportional counting (1). In this procedure the total COZ is first measured in the Van Slyke-Neil1 manometric apparatus, then transferred to the counting tube where methane is added until the COz-methane mixture reaches atmospheric pressure. The counting is done with a potential of 3800 volts across the counter. A...
Radon is naturally released from the soil into the surface layer of the atmosphere, and by monitoring the natural radioactivity data of radon and its shot-live decay products we can get valuable information about the dilution properties of the lower boundary layer. This paper explores the dispersion characteristics of the lower layer of the atmosphere in Lanzhou, China, and the close relationsh...
Background: Salivary flow rate (SFR), to estimate salivary gland dysfunction and radioactivity in different body fluids, to evaluate its intensity, were determined in thyroid patients after 131-I therapy. Material and Methods: For determination of SFR an innovative sponge test was adopted and the radioactivity in saliva, blood and serum of thyroid patients was determined by NaI (TI) Scintillati...
Linezolid (Zyvox), the first of a new class of antibiotics, the oxazolidinones, is approved for treatment of Gram-positive bacterial infections, including resistant strains. The disposition of linezolid in human volunteers was determined, after a 500-mg (100-microCi) oral dose of [(14)C]linezolid. Radioactive linezolid was administered as a single dose, or at steady-state on day 4 of a 10-day, ...
For several decades, the United States has been without an ongoing program measuring levels of fission products in the body. Strontium-90 (Sr-90) concentrations in 2089 deciduous (baby) teeth, mostly from persons living near nuclear power reactors, reveal that average levels rose 48.5% for persons born in the late 1990s compared to those born in the late 1980s. This trend represents the first s...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید