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Methods used to measure the relative activity of a specific enzyme or its concentration in solution. Typically an enzyme substrate is added to a buff…

An immunoenzyme test for the presence of drugs and other substances in urine and blood. The test uses enzyme linked antibodies that react only with t…

The extent to which an enzyme retains its structural conformation or its activity when subjected to storage, isolation, and purification or various o…

An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound t…

A method of detection of the number of cells in a sample secreting a specific molecule. With this method, a population of cells are plated over top o…

The formation of clumps of RED BLOOD CELLS under low or non-flow conditions, resulting from the attraction forces between the red blood cells. The ce…

The number of RED BLOOD CELLS per unit volume in a sample of venous BLOOD.

ERYTHROCYTE size and HEMOGLOBIN content or concentration, usually derived from ERYTHROCYTE COUNT; BLOOD hemoglobin concentration; and HEMATOCRIT. The…

Estimated fluid sequestration is a dynamic severity parameter used in acute pancreatitis criteria.

Methods for recognizing the state of ESTRUS.

Occurrence or induction of ESTRUS in all of the females in a group at the same time, applies only to non-primate mammals with ESTROUS CYCLE.

Pleural-fluid biochemical profile consistent with an exudate.

Methods for assessing the patency of the fallopian tubes.

Fasting plasma glucose is a laboratory parameter used in diabetes mellitus diagnostic criteria.

Fecal leukocytes used as a ClinicalGraph target concept for investigation / lab_finding.

A measurement of the time needed for FIBRINOLYSIS to occur.

A urine test for formiminoglutamic acid, an intermediate metabolite in L-histidine catabolism in the conversion of L-histidine to L-glutamic acid. It…

A process of separating particulate matter from a fluid, such as air or a liquid, by passing the fluid carrier through a medium that will not pass th…

Pyrolysis of organic compounds at the temperature of a hydrogen-air flame to produce ionic intermediates which can be collected and the resulting ion…

The aggregation of suspended solids into larger clumps.

Precipitin tests which occur over a narrow range of antigen-antibody ratio, due chiefly to peculiarities of the antibody (precipitin). (From Stedman,…

The analysis of a chemical substance by inserting a sample into a carrier stream of reagent using a sample injection valve that propels the sample do…

Measurement of the polarization of fluorescent light from solutions or microscopic specimens. It is used to provide information concerning molecular …

Fluoroimmunoassay where detection of the hapten-antibody reaction is based on measurement of the increased polarization of fluorescence-labeled hapte…

Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an …

A form of fluorescent antibody technique utilizing a fluorochrome conjugated to an antibody, which is added directly to a tissue or cell suspension f…

A form of fluorescent antibody technique commonly used to detect serum antibodies and immune complexes in tissues and microorganisms in specimens fro…

Serologic assay that detects antibodies to Treponema pallidum, the etiologic agent of syphilis. After diluting the patient's serum to remove non-spec…