Results 251 to 260 of about 2,082,361 (307)
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Advances in Space Research, 1986
The radiation protection guidelines of the National Aeronautics and Space Administration (NASA) are under review by Scientific Committee 75 of the National Council Protection and Measurements. The re-evaluation of the current guidelines is necessary, first, because of the increase in information about radiation risks since 1970 when the original ...
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The radiation protection guidelines of the National Aeronautics and Space Administration (NASA) are under review by Scientific Committee 75 of the National Council Protection and Measurements. The re-evaluation of the current guidelines is necessary, first, because of the increase in information about radiation risks since 1970 when the original ...
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Radiation Research Supplement, 1960
Results are reported from a number of studies of radiation effects in gels. Topics discussed include the use of gel systems as radiation dosimeters, and the nature of the gel effect. 34 references. (C.H.)
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Results are reported from a number of studies of radiation effects in gels. Topics discussed include the use of gel systems as radiation dosimeters, and the nature of the gel effect. 34 references. (C.H.)
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Radiology, 1952
Several recent articles (3–7) have again called attention to the importance of radiation effects upon growing and adult bone. Whereas it was formerly thought that adult bone is one of the most radioresistant of normal tissues, it is now recognized that it is the soft-tissue components of the bone, such as the terminal blood vessels of the haversian and
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Several recent articles (3–7) have again called attention to the importance of radiation effects upon growing and adult bone. Whereas it was formerly thought that adult bone is one of the most radioresistant of normal tissues, it is now recognized that it is the soft-tissue components of the bone, such as the terminal blood vessels of the haversian and
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The International Journal of Applied Radiation and Isotopes, 1966
Abstract Irradiation of pectins by γ-rays causes the decomposition of molecules, which is observed as an extensive decrease of the specific viscosity of the solutions. The molecular weight also decreases by a factor in the range of 10 2 . The decomposition is intensified when solutions of pectin in water are irradiated.
M D, Dzamić, B R, Janković
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Abstract Irradiation of pectins by γ-rays causes the decomposition of molecules, which is observed as an extensive decrease of the specific viscosity of the solutions. The molecular weight also decreases by a factor in the range of 10 2 . The decomposition is intensified when solutions of pectin in water are irradiated.
M D, Dzamić, B R, Janković
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The Paradox of Radiation's Effects
Science, 2005Paradoxes are very often indicative of our inadequate insight into natural phenomena rather than being features of the phenomena themselves. C. Dissanayake's description of the intimate entanglement of human health with mankind's local material basis (“Of stones and health: medical geology in ...
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The biological effects of radiation
International Journal of Risk and Safety in Medicine, 1993Nuclear medicine offers many diagnostic possibilities for which there are no adequate alternatives. The growing contribution of nuclear procedures to diagnostic medicine, however, has an additional effect: the radiation on normal tissues. Accurate estimations of the radiation dose and the related risks is required to weigh the advantages against the ...
R A, de Vries +3 more
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Radiation Effects on Biomembranes
1974Radiation damage can be produced by directly-ionizing radiation, such as α particles, β particles, protons, etc., indirectly by γ and x rays, which cause ejection of fast electrons from target atoms, as well as by neutrons which generate recoil protons and other nuclei. In all cases the resulting charged particles excite or ionize other molecules in so-
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Effects of Ultraviolet Radiation
Medical Clinics of North America, 1990Ultraviolet radiation from high-intensity sources has well-known acute effects on the eye and skin, consisting primarily of photokeratoconjunctivitis and sunburn, which are enhanced in the presence of photosensitizing agents. Long-term elevated exposure to low-level ultraviolet radiation is also responsible for an increased risk of squamous- and basal ...
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Current Osteoporosis Reports, 2013
Ionizing radiation produces its deleterious biologic effects by both direct (DNA strand breaks) and indirect processes (formation of free oxygen radicals). Mitotically active cells are more susceptible to the detrimental effects of ionizing radiation.
Rafael, Pacheco, Harlan, Stock
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Ionizing radiation produces its deleterious biologic effects by both direct (DNA strand breaks) and indirect processes (formation of free oxygen radicals). Mitotically active cells are more susceptible to the detrimental effects of ionizing radiation.
Rafael, Pacheco, Harlan, Stock
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Effects of Ultraviolet Radiation
Annual Review of Physiology, 1946Interest in obtaining a better understanding of biological effects of ultraviolet radiation has been stimulated to a great extent dur ing the last few years by the wide application that ultraviolet has found as a therapeutic agent (1) in genetics (120), in the study of the fundamental structure of living cells (23), and in its wide use in aerobiology (
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