Nodes

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,…

Technique using an instrument system for making, processing, and displaying one or more measurements on individual cells obtained from a cell suspens…

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…

A method used to study the lateral movement of MEMBRANE PROTEINS and LIPIDS. A small area of a cell membrane is bleached by laser light and the amoun…

A type of FLUORESCENCE SPECTROSCOPY using two FLUORESCENT DYES with overlapping emission and absorption spectra, which is used to indicate proximity …

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…

The use of fluorescence spectrometry to obtain quantitative results for the FLUORESCENT ANTIBODY TECHNIQUE. One advantage over the other methods (e.g…

An analytical method for detecting and measuring FLUORESCENCE in compounds or targets such as cells, proteins, or nucleotides, or targets previously …

Measurement and evaluation of the components of substances to be taken as FOOD.

Test to measure the levels of NITRIC OXIDE (an ENDOTHELIUM-DEPENDENT RELAXING FACTOR) in the exhaled air. FeNO test is used to determine levels of in…

A method which uses specific precipitation reactions to separate or collect substances from a solution.

Separation of molecules and particles by a simultaneous action of carrier liquid flow and focusing field forces (electrical, sedimentation, or therma…

Method of tissue preparation in which the tissue specimen is frozen and then dehydrated at low temperature in a high vacuum. This method is also used…

A replica technique in which cells are frozen to a very low temperature and cracked with a knife blade to expose the interior surfaces of the cells o…

Preparation for electron microscopy of minute replicas of exposed surfaces of the cell which have been ruptured in the frozen state. The specimen is …

A modification of the freeze-drying method in which the ice within the frozen tissue is replaced by alcohol or other solvent at a very low temperatur…

Thinly cut sections of frozen tissue specimens prepared with a cryostat or freezing microtome.

A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compound…

Gastric analysis for determination of free acid or total acid.

Medical procedure involving the emptying of contents in the stomach through the use of a tube inserted through the nose or mouth. It is performed to …

The techniques involved in creating and inserting synthetic selfish genetic elements called gene drives. Gene drives carry a payload gene and are des…

Genetic engineering or molecular biology techniques that involve DNA REPAIR mechanisms for incorporating site-specific modifications into a cell's ge…

The determination of the pattern of genes expressed at the level of GENETIC TRANSCRIPTION, under specific circumstances or in a specific cell.