Category: F
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Ferrous sulfate
A dietary supplement used to treat iron deficiencies and iron deficiency anemia. Ferrous sulfate (Feosol, Fero- Folic, ViTelle, Irospan, Vi-Daylin) contains the iron needed for the formation and function of red blood cells that carry oxygen through the bloodstream. Ferrous sulfate is available without a prescription, but it should not be used for long periods…
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Feldenkrais method
A form of “body education” that teaches efficient and coordinated use of the body. The goal of the Feldenkrais method is to reduce stress on joints, increase flexibility, and expand the range of motion. The method was invented by an Israeli nuclear physicist following his own knee injury when he developed a way to restore…
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Famciclovir
An antiviral drug used to treat herpes zoster (shingles). Famciclovir (Famvir) is sometimes used to treat genital herpes. Famciclovir works by interfering with the reproduction of DNA in the herpesvirus, but it has less effect on DNA in uninfected body cells. An antiviral drug used to treat herpes simplex and herpes zoster. Within the realm…
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False memory
A memory that distorts an actual experience or that is a fictional creation of the imagination. In some cases, false memory involves errors in remembering details of events. Dreams can be confused with reality and later recalled as if they were actual events. False memories may also arise from prodding or leading impressionable individuals, particularly…
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Facial spasm
An involuntary, repetitive, spasmodic movement of the facial muscles. The most common facial spasms are eye blinking or squinting, twitching around the mouth, and wrinkling of the nose. While their cause remains unknown, facial spasms usually increase in severity during stressful periods. Facial spasms most often occur in childhood, but some persist in adulthood. Facial…
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Flesh eating bacteria
The common name for a severe but rare destructive infection of the skin and underlying tissues that rapidly advances into shock. Known medically as necrotizing fasciitis, it can cause death if left untreated.
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Fricke dosimeter
A chemical radiation dosimeter that uses the change of concentration of ferric ions in a solution subject to irradiation to quantify the amount of dose delivered to the sample.
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Free-air chamber
A device used as a primary standard for calibrating x-ray exposure. They are used in national calibration laboratories throughout the world.
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Fourier transform imaging
Imaging techniques in which at least one dimension is phase encoded by applying variable gradient pulses along that dimension before “reading out” the NMR signal with a gradient magnetic field perpendicular to the variable gradient. The Fourier transform is then used to reconstruct an image from the set of encoded NMR signals.
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Fourier transform
A mathematical procedure that separates out the frequency components of a signal from its amplitudes as a function of time, or vice versa.