نتایج جستجو برای: gamma ray gr
تعداد نتایج: 419111 فیلتر نتایج به سال:
Rate of change, second derivative and volatility gamma-ray (GR) well-log curves provide useful indicators with which to characterize lithofacies in clastic sedimentary sequences. Rolling averages these variables, as they change depth, are also able distinguish certain features. These attributes make it possible accurately key facies by using only data, both formulaic calculations employing mach...
background: in radiation therapy, water is the phantom material of choice, both for reference and for relative dosimetry measurements. solid phantoms, however, are more useful for routine measurements because they tend to be more robust and easier to set up than water phantoms. materials and methods: fluka input data cards have been arranged in sequential order. a simple cylindrical geometry wi...
چکیده ندارد.
gamma-rays emitted from the ground surface relate to the primary mineralogy and geochemistryof the bedrock, and the secondary weathered materials. this information can contribute significantly to anunderstanding of the geochemical and pedogenetic history of a region. the main aim of this paper was to study the relationship between ground gamma-ray data and basement geochemistry in the lese catc...
In the Lower Cretaceous McMurray Formation (Alberta, Canada), many intervals of intensely bioturbated (Bioturbation Index = 5–6) fine-grained sediments are characterized by high gamma-ray (GR) readings. Several methods, including sedimentary facies analysis, thin-section petrography, handheld spectral gamma-ray, portable X-ray fluorescence, diffraction, inductively coupled plasma-mass spectrome...
The effect of N-acetylcysteine (NAC) (Ig/kg body weight in saline for 7 days) against the damages induced by gamma ray was studied. Whole body exposure of rats to gamma-rays (3.5 Gy) caused increases in lipid peroxides (P < 0.01). Reduced glutathione (GSH) (P < 0.01) and total sulphydryl groups (TSH) (P < 0.05), were found to be increased probably to counteract the damages produced by the lipid...
Pancreatic islet transplantation is a highly promising approach for the treatment of insulin-dependent diabetes mellitus. However, the procedure remains experimental for several reasons, including its low efficiency caused by the early graft loss of transplanted islets. We demonstrate that Gr-1+CD11b+ cells generated by transplantation and their IFN-gamma production triggered by Valpha14 NKT ce...
A non destructive technique based on gamma spectrometry and application of the Monte Carlo method for detector efficiency calibration, was used to assay radioactive content waste drums. Exploranium GR-130 miniSPEC portable gamma ray spectrometer was used to externally monitor radioactive waste drums containing ion exchange resin waste from the water demineralization system of GRR-1 open pool-ty...
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