Results 261 to 270 of about 11,524,538 (332)
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Angular Distribution of Radioactive Disintegration Products
Nature, 1948THE thermodynamics of the orientation of nuclei by strong magnetic fields at very low temperatures was worked out by Simon1 in 1939. He found that with fields of 100,000 gauss and temperatures of 0·01° K., that is, under conditions which can be realized experimentally, the entropy of nuclear spin systems should be decreased by about 20–30 per cent, and
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Kinetics of the intrapleural distribution of a radioactive bolus
Respiration Physiology, 1986Through the use of a gamma-camera placed horizontally over the chest of 5 supine, anesthetized and spontaneously breathing dogs we studied the kinetics of the intrapleural spreading of 1 ml saline containing 2 mg of 99mTc labelled albumin (250 microCi/kg) injected at various points on the costal side.
Miserocchi G +6 more
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Radioactivity Distributions in the Metallurgical Processing of Thorium
Health Physics, 1962Abstract The radioactivity distribution patterns produced in the metallurgical processing (particularly casting by consumable arc melting) of thorium metal have been studied. Samples from various locations in the metal, from material deposited on process equipment, and from process area environmental sampling were subjected to gross counting, alfa ...
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Distribution of radioactivity in ancient sediments
Geological Society of America Bulletin, 1944By the use of beta-ray counters a method has been developed for the determination of the three radioactive constituents in ancient sediments—potassium, thorium, and uranium. Owing to the high efficiency of the counters to beta radiation only 3 grams of sample are required. The apparatus is calibrated with radioactive standards.
ROLAND F. BEERS, CLARK GOODMAN
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THE DISTRIBUTION OF RADIOACTIVE-IODIDE IN THE UTERUS OF THE RABBIT
Journal of Endocrinology, 1965Abstract The transport of 131I-labelled polymer microspheres through the female reproductive tract of the rabbit has already been reported (Glover & Patterson, 1963; Glover & Wood, 1964), but the systemic distribution of residual unbound radioactive iodide after the process of labelling the microspheres has not been described ...
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Tissue Distribution of a Radioactive Spinal Anæsthetic
Nature, 1949WHEN a spinal anaesthetic leaves the subarachnoid space and the neural elements contained therein, it enters the general circulation, by which agency it is distributed among the various tissues of the body. Hitherto, on account of the technical difficulties attendant upon the estimation of an anaesthetic substance at low concentration in the presence ...
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Distribution of Radioactive Barium in Eye Tissues
Nature, 1959THE presence of high concentrations of barium in the pigmented tissues of the eye of many species is now well established1,2. The observations on barium-140 reported here demonstrate that this radioactive isotope of the element is markedly concentrated in the uveal tract of herbivores.
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The distribution of radioactivity from rain
Eos, Transactions American Geophysical Union, 1958Under conditions similar to Cincinnati, Ohio, fallout is the result of rainout and snowout. Without precipitation there is little fallout even though the particulate activity of surface air is abnormally high. Much of the suspended activity in cistern water from rain will be removed by sedimentation.
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Computation of Dose Distributions for Radioactive Seed Implants
Acta Radiologica: Oncology, 1980An interactive treatment planning program for the computation of dose distributions for 125I and 192Ir seed implants of up to 300 sources is described. The seed coordinates are entered using either the keyboard or a sonic digitizer from either orthogonal or stereo films.
I I, Rosen, R G, Lane, C A, Kelsey
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The Distribution of Radioactivity with Depth in the Continents
Geological Magazine, 1954AbstractThe heat generated by the radioactive elements in the surface of the earth has been calculated by Evans and Goodman (1941) and by H. Jeffreys (1952). The amount of radioactivity in the depths of the continents obviously cannot be directly calculated.
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