Results 341 to 350 of about 2,520,292 (373)
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2010
Ionizing radiation has sufficient energy to break chemical bonds and produce charged ions in living tissue. These changes may cause cell death, but breaks of both strands of a DNA molecule that do not kill a cell may be a precursor of cancer. Excluding medical exposures, natural radiation accounts for most human exposure, which produces ...
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Ionizing radiation has sufficient energy to break chemical bonds and produce charged ions in living tissue. These changes may cause cell death, but breaks of both strands of a DNA molecule that do not kill a cell may be a precursor of cancer. Excluding medical exposures, natural radiation accounts for most human exposure, which produces ...
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Radiation and Radiation Disorders
2019With current technologies, radiation doses associated with exploration and habitation missions to the Moon and Mars may well exceed the limits currently defined for LEO operations. Assessment of the radiation protection needed during interplanetary and remote planetary missions should include consideration of several key technologies, such as ...
Fathi Karouia +3 more
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Ionizing radiation and radiation protection
2017Ionizing radiation has been revolutionizing the diagnostic process in medicine. However, its use is not without risk, necessitating protection of patients and staff from potential harm. The amount of radiation patients receive continues to rise, mainly due to the use of high-dose examination techniques such as computed tomography and image-guided ...
Peter Howells, Jeannette Kathrin Kraft
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1980
This chapter examines the interaction of various radiations with matter beginning at the atomic level and finally at the macroscopic level. Incident electrons, beta particles and heavy ions are stopped primarily by the orbital electrons through Coulombic interactions. Additionally, electrons and betas can produce bremsstrahlung. Heavy charged particles
Raymond L. Murray, Keith E. Holbert
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This chapter examines the interaction of various radiations with matter beginning at the atomic level and finally at the macroscopic level. Incident electrons, beta particles and heavy ions are stopped primarily by the orbital electrons through Coulombic interactions. Additionally, electrons and betas can produce bremsstrahlung. Heavy charged particles
Raymond L. Murray, Keith E. Holbert
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Radiation Physics and Radiation Safety
2015Abstract One of the fundamental quests of nuclear cardiology is the search for elements with appropriate chemical properties for use in radiopharmaceuticals, which have radioactive isotopes that produce photons well suited for imaging, and deliver only a small radiation dose to the patient.
Paul H. Murphy, James R. Galt
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Radiation Protection Dosimetry, 2011
When this paper was about to go to press, the International Commission on Radiological Protection released a statement recommending a change in the threshold dose for the eye lens and dose limits for eye for occupationally exposed persons. It is clear that the earlier published threshold for radiation cataract is no longer valid.
Rehani, Madan M. +3 more
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When this paper was about to go to press, the International Commission on Radiological Protection released a statement recommending a change in the threshold dose for the eye lens and dose limits for eye for occupationally exposed persons. It is clear that the earlier published threshold for radiation cataract is no longer valid.
Rehani, Madan M. +3 more
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Continuous radiation — Scattered radiation
1970A The continuous radiation from an X-ray tube is scattered by the sample, diffracted by the analyzing crystal and measured by the detector.
J. L. de Vries, Ron Jenkins
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Nature, 1960
A discussion is presented of the view that whole-body irradiation of an animal can, in certain circumstances, speed up natural aging. In survival studies of chronically irradiated CBA mice, kept under certain conditions so that external disturbing factors were minimized, mean life shortening of a group of mice is roughly proportional to the mean ...
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A discussion is presented of the view that whole-body irradiation of an animal can, in certain circumstances, speed up natural aging. In survival studies of chronically irradiated CBA mice, kept under certain conditions so that external disturbing factors were minimized, mean life shortening of a group of mice is roughly proportional to the mean ...
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Selective Plasmonic Enhancement of Electric- and Magnetic-Dipole Radiations of Er Ions.
Nano letters (Print), 2016Lanthanoid series are unique in atomic elements. One reason is because they have 4f electronic states forbidding electric-dipole (ED) transitions in vacuum and another reason is because they are very useful in current-day optical technologies such as ...
Bongseok Choi +4 more
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Radiology, 1954
The field of radiation dosimetry involves a close relationship between units and instrumentation that is similar to the proverbial chicken and egg relationship, in which it is difficult to state unequivocally which came first. This duality has had a profound influence on the historical development of the field. It also justifies the presentation of the
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The field of radiation dosimetry involves a close relationship between units and instrumentation that is similar to the proverbial chicken and egg relationship, in which it is difficult to state unequivocally which came first. This duality has had a profound influence on the historical development of the field. It also justifies the presentation of the
openaire +4 more sources