نتایج جستجو برای: gross alpha
تعداد نتایج: 240082 فیلتر نتایج به سال:
A retrospective study was conducted to assess the association of alpha-gliadin antibodies with intraepithelial lymphocyte counts. Twelve subjects with apparently normal small intestinal histology and raised alpha-gliadin antibody titres had significantly increased intraepithelial lymphocyte counts (42 (SEM) 5.9) when compared with 16 subjects with normal alpha-gliadin antibody titres (17 (3.2);...
From 1967 until 1986, uranium mine dewatering increased dissolved gross alpha, gross beta, uranium and radium activities and dissolved selenium and molybdenum concentrations in the Puerco River as indicated by time trends, areal patterns involving distance from the mines and stream discharge. Additionally, increased dissolved uranium concentrations were identified in groundwater under the Puerc...
Radioactivity in the atmosphere originates from natural radioactive decay, cosmogenic production, nuclear weapons testing and nuclear accidents. Results of the measurements have shown that cosmogenic 7Be is the only gamma emitting nuclide found in the atmosphere of Iran (1). 7Be (t1/2 = 53d) is one of the radioactive products of the bombardment of the atmosphere by cosmic rays. About 75% of 7Be...
Levels of naturally occurring radioactive materials prior to processing of gold ore within and around the new eastern concession area of Perseus Mining (Ghana) Limited were carried out to ascertain the baseline radioactivity levels. The study was based on situ measurements of external gamma dose rate at 1 m above ground level as well as laboratory analysis by direct gamma spectrometry to quanti...
Background:The natural radioactivity levels in soil samples of Karadağ Mountain in central Anatolia region have been determined. Materials and Methods: Analyses on the collected samples were performed to determine gross alpha and beta radioactivity concentrations by using a gas-flow proportional counter and the concentrations of 238U, 232Th and 40K by using a NaI(Tl) scintillation detector. Res...
To examine the synergistic effects of alpha-toxin and perfringolysin O in clostridial myonecrosis, homologous recombination was used to construct an alpha-toxin deficient derivative of a perfringolysin O mutant of Clostridium perfringens. The subsequent strain was complemented with separate plasmids that carried the alpha-toxin structural gene (plc), the perfringolysin O gene (pfoA), or both to...
The results of research on the application method measurement gross alpha-, beta-activity in water using liquid scintillation counter (LSC) Quantulus 1220 are presented. Basic procedures preparation and spectrometric aqueous samples were studied performed. detection efficiency beta-particles depending quenching optimum beta-radiation separation parameter for used determined. Testing validation ...
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