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The interaction of two or more substrates or ligands with the same binding site. The displacement of one by the other is used in quantitative and sel…

A method of measuring the effects of a biologically active substance using an intermediate in vivo or in vitro tissue or cell model under controlled …

A material transfer technique used for assembling biological material or cells into a prescribed organization to create functional structures such as…

Removal and pathologic examination of specimens from the living body.

Using fine needles (finer than 22-gauge) to remove tissue or fluid specimens from the living body for examination in the pathology laboratory and for…

The use of needles usually larger than 14-gauge to remove tissue samples large enough to retain cellular architecture for pathology examination.

Removal and examination of tissue obtained through a transdermal needle inserted into the specific region, organ, or tissue being analyzed.

Incorporation of biotinyl groups into molecules.

A reaction characterized by a violet color upon the addition of copper sulfate to all compounds with two amide or peptide bonds linked directly or th…

Duration of blood flow after skin puncture. This test is used as a measure of capillary and platelet function.

The number of LEUKOCYTES and ERYTHROCYTES per unit volume in a sample of venous BLOOD. A complete blood count (CBC) also includes measurement of the …

An examination of chemicals in the blood.

Laboratory tests for evaluating the individual's clotting mechanism.

Test to determine the presence of blood infection (e.g. SEPSIS; BACTEREMIA).

Self evaluation of whole blood glucose levels outside the clinical laboratory. A digital or battery-operated reflectance meter may be used. It has wi…

Testing erythrocytes to determine presence or absence of blood-group antigens, testing of serum to determine the presence or absence of antibodies to…

Measurement of rate of settling of ERYTHROCYTES in blood.

The taking of a blood sample to determine its character as a whole, to identify levels of its component cells, chemicals, gases, or other constituent…

The urea concentration of the blood stated in terms of nitrogen content. Serum (plasma) urea nitrogen is approximately 12% higher than blood urea nit…

Blood urea nitrogen is a renal and metabolic laboratory parameter used in severity criteria and dehydration or renal assessment.

A method that is derived from western blotting (BLOTTING, WESTERN) and is used to detect protein-protein interactions. The blotted proteins are probe…

Detection of RNA that has been electrophoretically separated and immobilized by blotting on nitrocellulose or other type of paper or nylon membrane f…

A method (first developed by E.M. Southern) for detection of DNA that has been electrophoretically separated and immobilized by blotting on nitrocell…

A method that is used to detect DNA-protein interactions. Proteins are separated by electrophoresis and blotted onto a nitrocellulose membrane simila…

Identification of proteins or peptides that have been electrophoretically separated by blot transferring from the electrophoresis gel to strips of ni…

The total amount of a chemical, metal or radioactive substance present at any time after absorption in the body of man or animal.

A molecular probe technique that utilizes branched DNA (bDNA) as a means to amplify the hybridization signal. One end of the bDNA molecule is designe…

Any tests done on exhaled air.

Washing out of the lungs with saline or mucolytic agents for diagnostic or therapeutic purposes. It is very useful in the diagnosis of diffuse pulmon…

Washing liquid obtained from irrigation of the lung, including the BRONCHI and the PULMONARY ALVEOLI. It is generally used to assess biochemical, inf…