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Determination of the spectra of ultraviolet absorption by specific molecules in gases or liquids, for example Cl2, SO2, NO2, CS2, ozone, mercury vapo…

A technique for analysis of the chemical composition of molecules. A substance is bombarded with monochromatic ELECTRONS. Some of the electrons passi…

A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically deriv…

A spectroscopic technique which uses the Mossbauer effect (inelastic scattering of gamma radiation resulting from interaction with heavy nuclei) to m…

The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of S…

Analysis of the intensity of Raman scattering of monochromatic light as a function of frequency of the scattered light.

Tests of accuracy in pronouncing speech sounds, e.g., Iowa Pressure Articulation Test, Deep Test of Articulation, Templin-Darley Tests of Articulatio…

Tests of the ability to hear and understand speech as determined by scoring the number of words in a word list repeated correctly.

A test to determine the lowest sound intensity level at which fifty percent or more of the spondaic test words (words of two syllables having equal s…

A count of SPERM in the ejaculum, expressed as number per milliliter.

Movement characteristics of SPERMATOZOA in a fresh specimen. It is measured as the percentage of sperms that are moving, and as the percentage of spe…

A technique for detecting short-lived reactive FREE RADICALS in biological systems by providing a nitrone or nitrose compound for an addition reactio…

The marking of biological material with a dye or other reagent for the purpose of identifying and quantitating components of tissues, cells or their …

In vivo method of screening investigative anticancer drugs and biologic response modifiers for individual cancer patients. Fresh tumor tissue is impl…

Detection of drugs that have been abused, overused, or misused, including legal and illegal drugs. Urine screening is the usual method of detection.

Methods of studying differential GENE EXPRESSION of especially low-abundance, tissue-specific gene transcripts.

A biosensing technique in which biomolecules capable of binding to specific analytes or ligands are first immobilized on one side of a metallic film.…

The continuous, long-term suppression of VIRAL LOAD, generally to undetectable levels, as the result of treatment with ANTIVIRAL AGENTS.

A technique used to isolate specific interacting partners of MACROMOLECULAR COMPLEXES that have been assembled with a tagged component (bait) that in…

A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass anal…

Spectrum analysis of absorbed or emitted TERAHERTZ RADIATION.

Technique whereby the weight of a sample can be followed over a period of time while its temperature is being changed (usually increased at a constan…

Clotting time of PLASMA mixed with a THROMBIN solution. It is a measure of the conversion of FIBRINOGEN to FIBRIN, which is prolonged by AFIBRINOGENE…

A standard and widely accepted diagnostic test used to identify patients who have a vasodepressive and/or cardioinhibitory response as a cause of syn…

The simultaneous analysis of multiple samples of TISSUES or CELLS from BIOPSY or in vitro culture that have been arranged in an array format on slide…

A technique for maintaining or growing TISSUE in vitro, usually by DIFFUSION, perifusion, or PERFUSION. The tissue is cultured directly after removal…

The technique of placing cells or tissue in a supporting medium so that thin sections can be cut using a microtome. The medium can be paraffin wax (P…

Generating tissue in vitro for clinical applications, such as replacing wounded tissues or impaired organs. The use of TISSUE SCAFFOLDING enables the…

The technique of using FIXATIVES in the preparation of cytologic, histologic, or pathologic specimens for the purpose of maintaining the existing for…

The process by which a tissue or aggregate of cells is kept alive outside of the organism from which it was derived (i.e., kept from decay by means o…