نتایج جستجو برای: uranium ore

تعداد نتایج: 18938  

2015
Xinjian Peng Maozhong Min Haiming Qiao Jinping Wang Mostafa Fayek Karen Hudson-Edwards

Uranium (U) concentration and the activities of 238U, 234U, and 230Th were determined for groundwaters, spring waters, and lake water collected from the Shihongtan sandstone-hosted U ore district and in the surrounding area, NW China. The results show that the groundwaters from the oxidizing aquifer with high dissolved oxygen concentration (O2) and oxidation-reduction potential (Eh) are enriche...

Journal: :The Lancet. Respiratory medicine 2014
Bryant Furlow

For Gilliland and colleagues’ work on uranium mining and lung cancer among Navajo men between 1969 and 1993 see J Occup Environ Med 2000; 42: 278–83 of the dangers. Some took ore and radioactive fossil wood home. Waste ore was used as building material for homes. Early cohorts of miners were “really heavily exposed”, says Jonathan Samet (Keck School of Medicine, Institute of Global Health, Univ...

2008
Mikhail Kiselev Nataliya Shandala Galina Gneusheva Vladimir Romanov Alex Titov Natalia Novikova

As part of the program of nuclear power development, the Russia Federation plans to increase uranium production and to improve supply from existing uranium mining and milling facilities. Moreover, development of new uranium ore deposits is also envisaged. A corollary of these developments is the placing of a high priority on environmental and human health protection Special attention should be ...

Journal: :Dose-response : a publication of International Hormesis Society 2012
Charles L Sanders

Ultra-low doses and dose- rates of ionizing radiation are effective in preventing disease which suggests that they also may be effective in treating disease. Limited experimental and anecdotal evidence indicates that low radiation doses from radon in mines and spas, thorium-bearing monazite sands and enhanced radioactive uranium ore obtained from a natural geological reactor may be useful in tr...

2018
Lisa Richter Larryn W. Diamond Petya Atanasova David A. Banks Jens Gutzmer

Most rare earth element deposits form from magmatic fluids, but there have also been discoveries of heavy rare earth element (HREE)– enriched hydrothermal xenotime deposits within sedimentary basins. As xenotime is notoriously insoluble, the question arises as to whether these lesser-known deposits form at typical basin temperatures or by influx of much hotter magmatic-hydrothermal fluids. The ...

اسماعیلی وردنجانی, مصطفی, شمسی‌پور دهکردی, رضا , موسائی, فیروز , پازند, کاوه ,

Uranium becomes soluble and mobile under oxidizing conditions in aqueous environment, and presence of complexing agents with uranium increase this mobility. Existence of such conditions in groundwaters of Ayrakan and Cheshmeh Shotori areas has led to oxidation, solubility and mobility of uranium minerals. Hydrogeochemical study of uranium in the study areas reveals the presence of bicarbonate i...

Journal: :British journal of industrial medicine 1970
Z Vích F Novosad V Brychtová

Vich, Z., Novosad, F., and Brychtova', V. (1970). Brit. J. industr. Med., 27, 287-290. Erythrocytes of uranium miners: the activity of the pentose phosphate pathway. The functioning of erythrocytes was studied by determination of the activity of the pentose phosphate pathway in 431 individuals 221 uranium miners, 42 employees of a uranium ore trimming station (30 of whom were exposed), 36 forme...

2007
F. P. Carvalho

In the last few years several European countries undertook closure and environmental remediation of old uranium mining sites. This is the case for Portugal. Due to concerns about public health, environmental radioactivity was recently investigated in a number of counties in the Centre-North of Portugal where the extraction and chemical treatment of uranium ore was carried out, as well as in ref...

2017
Larry Benson D. L. Leach

Benson, L.V. and Leach, D.L., 1979. Uranium transport in the Walker River Basin, California and Nevada. J. Geochem. Explor., 11: 227-248. During the summer of 1976 waters from tributaries, rivers, springs and wells were sampled in the Walker River Basin. Snow and sediments from selected sites were also sampled. All samples were analyzed for uranium and other elements. The resulting data provide...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1386

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