| fluorescein sodium | A dye used for diagnosis of certain ocular diseases, differentiation or delineation of organ parts in surgery, and determination of circulation time. Synonym: resorcinolphthalein sodium, uranin. (05 Mar 2000) |
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| fluorescein string test | A string test used to determine location of a bleeding intestinal lesion in which fluorescein is given intravenously to determine gastrointestinal haemorrhage; if the string fluoresces after removal, it has been contaminated by blood that has appeared since injection of the fluorescein; used to determine location of bleeding lesion. (05 Mar 2000) |
| fluorescein-5-isothiocyanate | <chemical> 3',6'-dihydroxy-5-isothiocyanatospiro(isobenzofuran-1(3h),9'-(9h)xanthen)-3-one. Fluorescent probe capable of being conjugated to tissue and proteins. It is used as a label in fluorescent antibody staining procedures as well as protein- and amino acid-binding techniques. Pharmacological action: fluorescent dyes. Chemical name: Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dihydroxy-5-isothiocyanato- (12 Dec 1998) |
| fluorescein-conjugated antibody | Refers to an antibody that has joined with a fluorescein molecule. (09 Oct 1997) |
| fluoresceins | <chemical> A family of spiro(isobenzofuran-1(3h),9'-(9h)xanthen)-3-one derivatives. These are used as dyes, as indicators for various metals, and as fluorescent labels in immunoassays. Pharmacological action: fluorescent dyes. (12 Dec 1998) |
| fluorescence | <chemistry, physics> The emission of one or more photons by a molecule or atom activated by the absorption of a quantum of electro magnetic radiation. Typically the emission, that is of longer wavelength than the excitatory radiation, occurs within 10exp 8 seconds: phosphorescence is a phenomenon with a longer or much longer delay in re radiation. Note that rays, X-rays, UV, visible light and IR radiations may all stimulate fluorescence. (25 Jun 1999) |
| fluorescence energy transfer | <technique> Transfer of energy from one fluorochrome to another. The emission wavelength of the fluorochrome excited by the incident light must approximately match the excitation wavelength of the second fluorochrome. If light at the second emission wavelength is detected, it implies that the two fluorochromes were physically within a few nanometres. Used as a technique to probe protein or cell interactions. (25 Jun 1999) |
| fluorescence immunoassay | <technique> A sensitive technique which uses fluorescein, a fluorescent molecule, to measure the antigen or antibody concentration in a solution. (09 Oct 1997) |
| fluorescence in situ hybridization | <molecular biology, technique> A type of in situ hybridization in which target sequences are stained with fluorescent dye so their location and size can be determined using fluorescence microscopy. This staining is sufficiently distinct that the hybridization signal can be seen both in metaphase spreads and in interphase nuclei. Acronym: FISH (25 Jun 1999) |
| fluorescence microscope | <instrument, microscopy> A microscope illuminated by ultraviolet or blue light so that the object may re-radiate light of longer wavelengths. To protect the eyes, a W-absorbing filter should be provided if not built into the fluorescence microscope. (05 Aug 1998) |
| fluorescence microscopy | <procedure> Any type of microscopy in which intrinsic or applied reagents are visualised. Intrinsic fluorescence is often referred to as auto fluorescence. The applied reagents typically include fluorescently labelled proteins that are reactive with sites in the specimen. In particular, fluorescently labelled antibodies are widely used to detect particular antigens in biological specimens. (18 Nov 1997) |
| fluorescence plus Giemsa stain | <technique> A stain used to demonstrate sister chromatid exchange; cells are grown in 5-bromodeoxyuridine, followed by chromosome preparation, staining in Hoechst 33258, exposure to light, and staining in Giemsa; chromosomes exhibit a "harlequin" appearance. (05 Mar 2000) |
| fluorescence polarisation immunoassay | A technique which takes advantage of the increased polarisation (non-random propagation of emission) of fluorescent light emissions when a fluorescent labelled antigen is bound by reagent antibody. The higher the concentration of unlabelled patient antigen present in the test mixture, the less bound fluorescent antigen is present and, consequently, the lower the polarisation of the fluorescent light emission. Standard calibration yields quantitative results. (05 Mar 2000) |
| fluorescence polarization | Measurement of the polarization of fluorescent light from solutions or microscopic specimens. It is used to provide information concerning molecular size, shape, and conformation, molecular anisotropy, electronic energy transfer, molecular interaction, including dye and coenzyme binding, and the antigen-antibody reaction. (12 Dec 1998) |
| fluorescence polarization immunoassay | Fluoroimmunoassay where detection of the hapten-antibody reaction is based on measurement of the increased polarization of fluorescence-labelled hapten when it is combined with antibody. The assay is very useful for the measurement of small haptenic antigens such as drugs at low concentrations. (12 Dec 1998) |
Synonyms :
Synonyms :
Synonyms : Anisotropies, Fluorescence, Fluorescence Anisotropies, Fluorescence Polarizations, Polarizations, Fluorescence
Synonyms : Fluorescence Polarization Immunoassays, Fluoroimmunoassay, Polarization, Fluoroimmunoassays, Polarization, Immunoassays, Fluorescence Polarization, Polarization Fluoroimmunoassays, Polarization Immunoassay, Fluorescence
Synonyms : FRAP (Fluorescence Recovery After Photobleaching), FRAPs (Fluorescence Recovery After Photobleaching)
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| fluor- |
fluorite: a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine
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| fluorescein |
a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)
Ãâó: wordnet.princeton.edu/perl/webwn
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| fluoridate |
subject to fluoridation; treat with fluoride; "fluoridized water"; "fluoridize the teeth of children"
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| fluoridization |
fluoridation: the addition of a fluoride to the water supply (to prevent dental decay)
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| fluorescence |
light emitted during absorption of radiation of some other (invisible) wavelength
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| fluor | lamp consisting of a tube coated on the inside with a fluorescent material |
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| fluor | subject to fluoridation |
| fluor | the addition of a fluoride to the water supply (to prevent dental decay) |
| fluor | a salt of hydrofluoric acid |
| fluor | the addition of a fluoride to the water supply (to prevent dental decay) |
| fluor | subject to fluoridation |
| fluor | the addition of a fluoride to the water supply (to prevent dental decay) |
| fluor | subject to fluoridation |
| fluor | a nonmetallic univalent element belonging to the halogens |
| fluor | a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light |
| fluor | an acid of fluorine and boron |
| fluor | a salt of fluoroboric acid |
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