نتایج جستجو برای: radium equivalent
تعداد نتایج: 141493 فیلتر نتایج به سال:
tau.amegroups.com © Translational Andrology and Urology. All rights reserved. Most patients with relapsed prostate cancer develop metastatic disease and eventually become castration-resistant. Skeletal metastasis is common in castrate resistant prostate cancer and is an independent poor prognostic factor (1). Furthermore, skeletal related events (SRE) such as spinal cord compression, pathologic...
In 1922 the Québec government appropriated $100,000 for the purchase of radium to found an Institut du Radium at the University of Montreal. Opened largely through the initiative and drive of Dr. Joseph-Ernest Gendreau, the institut was the first organization devoted to radium therapy and cancer treatment in Canada. This paper describes the background, origins and development of the Institut wi...
The radiation treatment of intra-oral cancer involves technics combining intra-oral radium applications directly to the primary seat of the disease and external radiation to the glandular regions of the neck. The problem of the primary lesion has been successfully met by electrosurgical methods, radium seed implantations directly into and about the site of the disease, and by heavily filtered r...
Radium-226, an alpha emitter with half-life 1600 years, is ubiquitous in natural environments. Present rocks and soils, it also absorbed by vegetation. The efficiency of 226Ra uptake plants from the soil important to assess for study heavy metals plants, monitoring radioactive pollution, biogeochemical cycle radium Critical Zone. Using a thoroughly validated measurement method effective concent...
Background: The natural radionuclides are always present in soil and care needs to be taken to minimize the radiation dose to humans. These radionuclides are mostly gamma ray emitting radionuclides which contribute to the radiation dose in long term behavior of radionuclides in soil. Health hazards associated with natural radioactivity are of great concern and it is necessary to assess risk due...
We report a simple new technique for measuring low-level radium isotopes (224Ra and 226Ra) in natural waters. The radium present in natural waters is first preconcentrated onto MnO2-coated acrylic fiber (Mn fiber) in a column mode. The radon produced from the adsorbed radium is then circulated through a closed air-loop connected to a commercial radon-in-air monitor. The monitor counts alpha dec...
toward march 1970 up to may 1972 it was monthly measured the radium quantity, available in, tehran milk, fortunate1y the results were in accordance to a reasonable value. the only remarkable point was that in wintertime, the indio activity decreased to minimum of 0.02 pci/lit, and in spring time it went up to a maximum of 0.09 pci/lit. the next note worthy point was observed in a special conta...
The radiological effects of mined tailings in some locations in Jos Plateau State have been estimated. The samples were collected from 14 different sites. The radio nuclides concentrations in the tailing samples were measured using gamma spectroscopy method. The average values of Ra 226 , Th 232 and K 40 obtained were 762.4Bqkg, 17258.3Bqkg and 5901.4Bqkg respectively. These radioactivity conce...
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