| fluorescein isothiocyanate | <chemical> A fluorescent chemical derived from fluorescein which is used to label proteins. (25 Jun 1999) |
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| 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) |
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| allyl isothiocyanate | CH2==CH-CH2-NCS; volatile mustard CH-allylisosulfocyanate; isothiocyanic allyl ester;obtained from Brassica nigra or produced synthetically; a vesicant, used in 10% solution in 50% alcohol as a counterirritant in neuralgia. Gives mustard its characteristics flavor and aroma. See: mustard oil. Synonym: volatile mustard oil. (05 Mar 2000) |
| isothiocyanate | The radical of isothiocyanic acid, -N==C==S. (05 Mar 2000) |
| fluorescein | <chemical> Fluorophore commonly used in microscopy. Fluorescein di acetate can be used as a vital stain or can be conjugated to proteins (particularly antibodies) using isothiocyanate. Excitation is at 365nm and the emitted light is green yellow (450-490nm). The emission spectrum is pH sensitive and fluorescein can therefore be used to measure pH in intracellular compartments. (18 Nov 1997) |
| fluorescein angiography | <procedure> The process of taking X-rays of blood vessels that have been injected with a special dye. The dye allows to person viewing the X-ray to see the blood vessels. (13 Nov 1997) |
| fluorescein-conjugated antibody | Refers to an antibody that has joined with a fluorescein molecule. (09 Oct 1997) |
| fluorescein eye examination | A special test that allows the examiner to detect cornea abrasions or corneal foreign bodies. An orange dye (fluorescein) is placed into the eye and the eye is illuminated with a cobalt blue light (black light). This serves to highlight any irregularities in the corneal surface. (27 Sep 1997) |
| fluorescein instillation test | A test for patency of the lacrimal system; fluorescein instilled in the conjunctival sac can be recovered from the inferior nasal meatus. Synonym: Jones' test. (05 Mar 2000) |
| 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) |
| 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) |
| 3-O-methyl-fluorescein phosphatase | <enzyme> Used for assay of na-k-atpase in intact tissues Registry number: EC 3.6.1.- Synonym: 3-o-methylfluorescein phosphatase (26 Jun 1999) |