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radioactivity
radioactive
The Oxford Pocket Dictionary of Current English
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2009
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© The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information)
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ra·di·o·ac·tive
/ ˌrādēōˈaktiv/
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adj.
emitting or relating to the emission of ionizing radiation or particles:
radioactive decay
the water was radioactive.
DERIVATIVES:
ra·di·o·ac·tive·ly
adv.
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A Method to Correct for Radioactivity in Large Vessels That Overlap the Spine in Imaging-Based Marrow Dosimetry of Lumbar Vertebrae
Magazine article from: The Journal of Nuclear Medicine; 2/1/2008; ; 700+ words
; ...lumbar vertebrae is correction for radioactivity in large blood vessels anterior to...a method to correct for background radioactivity contributed from blood in large vessels...this vessel segment, and then the radioactivity in that volume at each imaging time...
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Inhomogeneous Localization of Radioactivity in the Human Kidney After Injection of [^sup 111^In-DTPA]Octreotide
Magazine article from: The Journal of Nuclear Medicine; 7/1/2004; ; 700+ words
; ...scheme, assuming homogeneous renal radioactivity distribution. The aim of this study was to reveal the radioactivity distribution in the normal human...of renal cancer. Distribution of radioactivity in the human kidney was investigated...
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Environmental radioactivity.
Magazine article from: Canadian Chemical News; 8/1/1991; ; 700+ words
; ...enough, however, that much of the original radioactivity has disappeared; the radioactivity still remaining, together with the products...the minds of most citizens. Sources of Radioactivity and Their Relative Significance A basic...
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Log Normal Distribution of Cellular Uptake of Radioactivity: Implications for Biologic Responses to Radiopharmaceuticals
Magazine article from: The Journal of Nuclear Medicine; 6/1/2006; ; 700+ words
; ...nonuniform distributions of radioactivity for dosimetry, and ultimately...response of tissues containing radioactivity, have been investigated extensively...normal cellular uptake of radioactivity. Theoretic calculations show...
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Pitchstone Drilling Intersects Radioactivity in Namibia.
News Wire article from: Marketwire Canada; 9/16/2009; 700+ words
; ...Completed at Dome North - Significant Radioactivity over 2.2 m in Calcrete - Planned...electromagnetic geophysical surveys. Significant radioactivity was observed in down hole gamma probe...encouraging due to the thickness and level of radioactivity in the zone. Radioactivity in DN...
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STUDY FINDS RADIOACTIVITY AROUND LOS ALAMOS LARGELY DUE TO NATURAL SOURCES
News Wire article from: US Fed News Service, Including US State News; 12/10/2008; 700+ words
; ...study that assessed levels of radioactivity near Los Alamos National Laboratory...confirmed that nearly all measured radioactivity in the area is due to natural sources. Findings also confirmed that radioactivity measured in Embudo Valley, Picuris...
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Cancer risk in relation to radioactivity in tobacco.
Magazine article from: Radiologic Technology; 1/1/1996; ; 700+ words
; ...exposed to higher concentrations of radioactivity than nonsmokers. Deposits of [sup...tobacco and tobacco smoke contained radioactivity,[2-6] and it was noted that people...reviews scientific literature documenting radioactivity in leaf tobacco, radioactivity in...
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No Abnormal Radioactivity at Test Site
News Wire article from: AP Online; 10/12/2006; 363 words
; ...Thursday it has detected no abnormal radioactivity levels at the suspected site of North...test blast earlier this week. "No radioactivity has been detected in North Korea...how his ministry had been measuring radioactivity in the North. He was scheduled to...
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Simultaneous recovery of size and radioactivity concentration of small spheroids with PET data
Magazine article from: The Journal of Nuclear Medicine; 1/1/1999; ; 700+ words
; ...spheroids could improve estimates of lesion radioactivity when object size is unknown. For reference...three adjusting factors. Size and radioactivity concentration of a spheroid were estimated...optimization method improved estimation of radioactivity concentration over that corrected by...
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Reports outline environmental radioactivity study findings from D.K. Keum and colleagues.
Newspaper article from: Ecology, Environment & Conservation; 1/16/2009; 700+ words
; ...compartment model for estimating the C-14 radioactivity in an agricultural plant exposed to...and root) and ears, to predict the radioactivity of different parts of a plant...reasonably well with the measured C-14 radioactivity of the rice plants that were artificially...
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Radioactivity
Book article from: World of Earth Science
Radioactivity Radioactivity originates from extraterrestrial sources and terrestrial geologic...elements with lower atomic numbers. Atoms that are radioactive emit radioactivity during spontaneous transformation from an unstable isotope to...
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radioactivity
Book article from: The Columbia Encyclopedia, Sixth Edition
radioactivity spontaneous disintegration or decay...radiation . The energy produced by radioactivity has important military and industrial...Radioactive Emissions Natural radioactivity is exhibited by several elements...
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radioactivity measurement and surveying
Book article from: The Oxford Companion to the Earth
radioactivity measurement and surveying The radioactivity of a sample is measured by electrical or photographic...in unit time. The basic unit for the measurement of radioactivity is the curie (Ci), which is defined as the quantity...
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Uranium
Encyclopedia entry from: The Gale Encyclopedia of Science
...Uranium Uranium ’ s radioactivity Uranium — the element...Indeed, the phenomenon of radioactivity was not to be discovered until...researchers interested in studying radioactivity at that time was pitchblende...
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Bertram Borden Boltwood
Encyclopedia entry from: Encyclopedia of World Biography
...and also uranium and thorium. The radioactivity of uranium had been discovered by Henri...fascinated with the popular science of radioactivity. In a series of papers in 1902 and...chemist, explained the phenomenon of radioactivity as the spontaneous disintegration of...
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