| DFA | direct fluorescent antibody; discriminant function analysis; dorsiflexion assistance |
|---|---|
| DAT | delayed-action tablet; dementia Alzheimer's type; dental aptitude test; diacetylthiamine; diet as to... |
| DC | daily census; data communication; data conversion; decrease; deep compartment; Dental Corps; deoxych... |
| LAI assay | Leukocyte Adherence Inhibition assay |
| ERA | electrical response activity; electroencephalic response audiometry; Electroshock Research Associati... |
| fluorescent antibody titre | An indirect method of measuring the concentration of an antibody in serum through the detection of fluorescent light emitted in a chemical reaction. (27 Sep 1997) |
|---|---|
| fluorescent antinuclear antibody test | FANA test, a test for antinuclear antibody components; used, in particular, for the diagnosis of collagen-vascular diseases. (05 Mar 2000) |
| fluorescent dyes | Dyes that emit light when exposed to light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags. They are used as markers in biochemistry and immunology. (12 Dec 1998) |
| fluorescent in situ hybridization | See FISH. (12 Dec 1998) |
| fluorescent label | A molecule which fluoresces and can be attached to a probe molecule that does not fluoresce. (09 Oct 1997) |
| fluorescent microscope | <instrument> A microscope equipped to examine material that fluoresces under ultraviolet (UV) light. (12 Dec 1998) |
| fluorescent screen | A screen coated with fluorescent crystals such as the calcium tungstate used in the fluoroscope. (05 Mar 2000) |
| fluorescent stain | <technique> A stain or staining procedure using a fluorescent dye or substance that will combine selectively with certain tissue components and that will then fluoresce upon irradiation with ultraviolet or violet-blue light. (05 Mar 2000) |
| fluorescent treponemal antibody-absorption test | <investigation> A sensitive and specific serologic test for syphilis. It is more specific than the VDRL assay. The patient's serum is diluted to remove non-specific antibodies and then mixed on a glass slide with Nichol's strain of Treponema pallidum. If antibodies are present in the patient's serum they bind to the antigen and the bound antibodies are detected with fluoresceinated antihuman gamma-globulin antibody. Synonym: FTA-ABS test. (12 Sep2002) |
| non-direct transmission | <epidemiology> A mode of transmission that differs in some mysterious way from indirect transmission. (05 Dec 1998) |
| direct | 1. Straight, in a straight line. 2. Performed immediately and without the intervention of subsidiary means. Origin: L. Directus (18 Nov 1997) |
| direct acrylic restoration | A direct resin restoration of autopolymerizing acrylic. (05 Mar 2000) |
| direct agglutination | A general term for techniques which use the agglutination (macroscopic clumping) of particulate reagents as an indicator of the presence of an antigen-antibody reaction. Examples (haemagglutination, latex agglutination and coagglutination) follow. (05 Mar 2000) |
| direct B-cell | Lymphocytes responding to a small range of antigens by antibody production without any requirement for T-cells. The antigens include flagellin and pokeweed mitogen. (18 Nov 1997) |
| direct bilirubin | Conjugated bilirubin = Direct bilirubin. Bilirubin that has been chemically attached to a glucuronide in the liver. The bilirubin that is excreted into the bile by the liver and stored in the gallbladder or transferred to the duodenum. Normal direct bilirubin is 0 to 0.3 mg/dl. Greater than normal values can be seen in bile duct obstruction, cirrhosis, Crigler-Najjar syndrome, Dubin-Johnson syndrome and hepatitis. (27 Sep 1997) |