نتایج جستجو برای: radioactivity concentration

تعداد نتایج: 389709  

2013
Wedad Reif Alharbi Adel G. E. Abbady

Soil gas radon Rn concentration was measured at 12 location in the Al-Qassim area, using radon gas analyzer-type Alpha GUARD 2000 PRQ from Genitron Instruments (Germany). In each location four different depths were taken for soil gas measurements, staring from the ground surface. The results suggested that the largest concentration was 340 ± 22 Bq/m for 60cm depth at in Al-Tarfia point sample P...

Journal: :Drug metabolism and disposition: the biological fate of chemicals 2000
M Sato H Suzaka H Miyazaki

Egualen sodium (sodium 3-ethyl-7-isopropyl-1-azulenesulfonate 1/3 hydrate) is a new antiulcer drug. There has been no difference observed in absorption between male and female rats, the relative amount of metabolites in male plasma has been higher than that in females, and the excretion ratios of metabolites in males have been significantly higher than those in females. However, the plasma conc...

Journal: :Cancer research 1989
C S Kwok A Crivici W D MacGregor M W Unger

In vitro multicell spheroids from a human melanoma cell line and the human colon cancer cell line HT29, used as control, have been established as a model of poorly vascularized micrometastases in vivo. The antimelanoma monoclonal antibody 96.5 was radiolabeled with 131I at specific radioactivities from 1.85 to 3.96 GBq/mg. Cytotoxicity of 131I-96.5 to the spheroids, at an initial size of 300 mi...

2000
Thomas G. Hobbs

A variety of commonly available household and industrial ceramic items and some specialty glass materials were assayed by alpha pulse counting and ion chamber voltage measurements for radioactivity concentrations. Identification of radionuclides in some of the items was performed by gamma spectroscopy. The samples included tableware, construction tiles and decorative tiles, figurines, and other...

Journal: :Drug metabolism and disposition: the biological fate of chemicals 2003
Chyung S Cook Loren M Berry Roy H Bible Jeremy D Hribar Elisabeth Hajdu Norman W Liu

A pharmacokinetics and metabolism study was conducted in eight healthy human volunteers. After oral administration of [14C]eplerenone (EP) at a dose of 100 mg per person as an aqueous solution, blood, saliva, breath, urine, and fecal samples were collected at various time points. All matrices were analyzed for total radioactivity and/or for EP and its open-lactone-ring form (EPA). EP was well a...

Mahdi Ahangari Mohamad Reza Zare Reza Pourimani Rouhollah Gheisari,

The activity concentrations of 226Ra, 232Th, 40K and 137Cs in water and sediment samples from hot springs of Mahallat and  soil samples from their neighboring environs  have been determined using two high resolution high purity germanium (HPGe) detectors with relative efficiencies 38.5% and 55%. The activity concentrations of 226Ra, 23...

Journal: :iranian journal of radiation research 0
m. gupta department of physics, national institute of technology, kurukshetra-136119, india r.p. chauhan department of physics, national institute of technology, kurukshetra-136119, india

background: natural radioactivity in materials under certain conditions can reach the hazardous radiological levels. so, it becomes necessary to study the natural radioactivity in different materials to assess the dose for the population in order to know the health risks and to have a baseline for future changes in the environmental radioactivity due to human activities. materials and methods: ...

Journal: :Universe 2022

The Laboratorio Subterráneo de Canfranc (LSC) is the Spanish national hub for low radioactivity techniques and associated scientific technological applications. concentration of airborne radon a major component radioactive budget in neighborhood detectors. LSC hosts Radon Abatement System, which delivers suppressed air with 1.1±0.2 mBq/m3 222Rn. content continuously monitored an Electrostatic M...

A. Begum, A. Islam, J. Ferdous,

Background: The concentrations and distributions of natural and anthropogenic radioactive materials in soils of the site of Rooppur Nuclear Power Plant (RNPP) were investigated with the aim of evaluating the environmental radioactivity and radiation hazard. Materials and Methods: Soil samples were collected from 40 locations in and around the proposed site of Rooppur Power Plant and determined ...

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