- 産業: Government
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United States Department of Health and Human Services, Radiation Emergency Medical Management
A brown to black mineral that has a distinctive luster. It consists mainly of uraninite (uo2), but also contains radium (ra). It is the main source of uranium (u) ore.
Industry:Medical devices
The sum of effective dose equivalent from external radiation and the committed effective dose equivalent from inhaled and ingested radioactive material. Quoted in units of rem.
Industry:Medical devices
The material spreading from a particular source and traveling through environmental media, such as air or ground water. For example, a plume could describe the dispersal of particles, gases, vapors, and aerosols in the atmosphere, or the movement of contamination through an aquifer (for example, dilution, mixing, or adsorption onto soil).
Industry:Medical devices
Pertaining to elements with atomic numbers higher than uranium (92). For example, plutonium (pu) and americium (am) are transuranics.
Industry:Medical devices
A heavy, man-made, radioactive metallic element. The most important isotope is pu-239, which has a half-life of 24,000 years. Pu-239 can be used in reactor fuel and is the primary isotope in weapons. One kilogram is equivalent to about 22 million kilowatt-hours of heat energy. The complete detonation of a kilogram of plutonium produces an explosion equal to about 20,000 tons of chemical explosive. All isotopes of plutonium are readily absorbed by the bones and can be lethal, depending on the dose and exposure time.
Industry:Medical devices
A radioactive isotope of the element hydrogen (chemical symbol h). See also deuterium.
Industry:Medical devices
A radioactive chemical element and a product of radium (ra) decay. Polonium is found in uranium (u) ores.
Industry:Medical devices
A nucleus that contains an uneven number of protons and neutrons and seeks to reach equilibrium between them through radioactive decay (i.e., the nucleus of a radioactive atom). See also stable nucleus.
Industry:Medical devices
Pt-gvhd occurs when donor lymphocytes in transfused blood attack recipient organs and tissues recognizing recipient hla and are not eliminated by host immunological defense.
Industry:Medical devices
A naturally occurring radioactive element whose principal isotopes are uranium-238 (u-238) and uranium-235 (u-235). Natural uranium is a hard, silvery-white, shiny metallic ore that contains a minute amount of uranium-234 (u-234).
Industry:Medical devices
