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Storage - The magnetic particles incorporated in the binder to form the magnetic layer on a magnetic tape. Iron oxide, chromium dioxide, barium ferrite, and metal particulate are various examples of magnetic pigment used in commercial tapes. The term pigment is a carry over of terminology from paint and coating technology - the magnetic coating on a tape is analogous to a coat of paint in which the magnetic particle is the paint pigment.
Council on Library and Information Resources - Cite This Source - This Definition - Browse Related Terms: Coercivity, lubricant, Magnetic pigment, Magnetic remanence, Magnetic retentivity, Sticky shed, Sticky tape, Tape baking, Tape noise, Vinegar syndrome
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Storage - The strength of the magnetic field that remains in a tape or magnetic particle after it is (1) exposed to a strong, external magnetic field and (2) the external field is removed. The property of a tape that determines its ability to record and store a magnetic signal. Mr is the common abbreviation for magnetic remanence. Magnetic remanence, Mr, and magnetic retentivity, Br, both refer to the ability of the tape to retain a magnetic field; however the latter is expressed in units of magnetic flux density.
Council on Library and Information Resources - Cite This Source - This Definition - Browse Related Terms: Coercivity, lubricant, Magnetic particles, Magnetic pigment, Magnetic retentivity, Sticky shed, Sticky tape, Tape baking, Tape noise, Vinegar syndrome
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Cancer - (mag-NEH-tik REH-zuh-nunts IH-muh-jing) A procedure in which radio waves and a powerful magnet linked to a computer are used to create detailed pictures of areas inside the body. These pictures can show the difference between normal and diseased tissue. Magnetic resonance imaging makes better images of organs and soft tissue than other scanning techniques, such as computed tomography (CT) or x-ray. Magnetic resonance imaging is especially useful for imaging the brain, the spine, the soft tissue of joints, and the inside of bones. Also called MRI, NMRI, and nuclear magnetic resonance imaging.
National Cancer Institute - Cite This Source - This Definition - Browse Related Terms: gadopentetate dimeglumine, Gd-DTPA, Magnevist, MRI, NMRI, nuclear magnetic resonance imaging
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Cancer - (mag-NEH-tik REH-zoh-nants SPEK-troh-SKAH-pik IH-muh-jing) A noninvasive imaging method that provides information about cellular activity (metabolic information). It is used along with magnetic resonance imaging (MRI) which provides information about the shape and size of the tumor (spatial information). Also called 1H-nuclear magnetic resonance spectroscopic imaging, MRSI, and proton magnetic resonance spectroscopic imaging.
National Cancer Institute - Cite This Source - This Definition - Browse Related Terms: 1H-nuclear magnetic resonance spectroscopic imaging, ferumoxtran-10, functional magnetic resonance imaging, gadolinium, magnetic resonance perfusion imaging, MRSI, perfusion magnetic resonance imaging, proton magnetic resonance spectroscopic imaging, radiology
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Cancer - A tiny bead made from particles of iron and carbon that can be attached to an anticancer drug. A magnet applied from outside the body then can direct the drug to the tumor site. This can keep a larger dose of the drug at the tumor site for a longer period of time, and help protect healthy tissue from the side effects of chemotherapy.
National Cancer Institute - Cite This Source - This Definition - Browse Related Terms: cumulative dose, defibrotide, dose, dose-dependent, dose-limiting, dose-rate, dosimetrist, fractionation, HDR, high-dose radiation, physical dependence, radiation physicist, schedule
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Weather - In solar-terrestrial terms, solar magnetograms are a graphic representation of solar magnetic field strengths and polarity
NOAA National Weather Service - Cite This Source - This Definition - Browse Related Terms: Emerging Flux Region (EFR), Filament, Interplanetary Magnetic Field, MEGG, Neutral Line, PDMT, Plage, Sector Boundary, Sferic, Solar Wind
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Telecommunications - The combined effect of the Earth's magnetic field and atmospheric ionization, whereby a linearly polarized wave entering the ionosphere is split into two components called the ordinary wave and the extraordinary wave. Note: The component waves follow different paths, experience different attenuations, have different phase velocities, and, in general, are elliptically polarized in opposite senses.
ATIS - Cite This Source - This Definition - Browse Related Terms: electromagnetic wave (EMW), Faraday effect, field strength, magnetic circuit, magnetic drum, magnetic tape, wavefront
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Weather - In solar-terrestrial terms, the boundary layer between the solar wind and the magnetosphere.
NOAA National Weather Service - Cite This Source - This Definition - Browse Related Terms: Active Region (AR), AP Index, Bartel's Rotation Number, Central Meridian Passage (CMP), Continuum Storm (CTM), Differential Rotation, Granulation, High-Speed Stream, insolation, Plage Corridor, Plagenil, Solar Coordinates, Solar Cycle, Solar Maximum, Solar Minimum, Solar Sector Boundary (SSB), SPOTNIL, Syzygy
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Weather - In solar-terrestrial terms, the magnetic cavity surrounding the earth, carved out of the passing solar wind by virtue of the geomagnetic field, which prevents, or at least impedes, the direct entry of the solar wind plasma into the cavity
NOAA National Weather Service - Cite This Source - This Definition - Browse Related Terms: Conjugate Points, Crochet, Geomagnetic Elements, Geomagnetic Field, Geomagnetic Storm, Gradual Commencement, H-component of the Geomagnetic Field, Magnetic Bay, NWD, Sudden Commencement (SC), Sudden Impulse (SI+ or SI-)