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The comparison of the quantity of meaningful data to the irrelevant or incorrect data.

The use of silver, usually silver nitrate, as a reagent for producing contrast or coloration in tissue specimens.

determination of sperm count and motility in a sample taken from the cervical canal within an hour of intercourse

Tests or bioassays that measure the skin sensitization potential of various chemicals.

A quantitative form of intradermal testing for the relative allergenicity of a substance. It is used to determine the amount of an allergen that will…

Epicutaneous or intradermal application of a sensitizer for demonstration of either delayed or immediate hypersensitivity. Used in diagnosis of hyper…

A procedure that uses a SLIT LAMP to examine structures in the front of the EYE, such as the CONJUNCTIVA; CORNEA; IRIS; and AQUEOUS HUMOR.

An extraction method that separates analytes using a solid phase and a liquid phase. It is used for preparative sample cleanup before analysis by CHR…

A solventless sample preparation method, invented in 1989, that uses a fused silica fiber which is coated with a stationary phase. It is used for sam…

The application of high intensity ultrasound to liquids.

The graphic registration of the frequency and intensity of sounds, such as speech, infant crying, and animal vocalizations.

Procedures for collecting, preserving, and transporting of specimens sufficiently stable to provide accurate and precise results suitable for clinica…

Measurement of the intensity and quality of fluorescence.

Determination of the energy distribution of gamma rays emitted by nuclei. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electr…

A mass spectrometric technique that is used for the analysis of a wide range of biomolecules, such as glycoalkaloids, glycoproteins, polysaccharides,…

A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organ…

A mass-spectrometric technique that is used for microscopic chemical analysis. A beam of primary ions with an energy of 5-20 kiloelectronvolts (keV) …

The spectrometric analysis of fluorescent X-RAYS, i.e. X-rays emitted after bombarding matter with high energy particles such as PROTONS; ELECTRONS; …

The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum.

Spectrophotometric techniques by which the absorption or emmision spectra of radiation from atoms are produced and analyzed.

Spectrophotometry in the infrared region, usually for the purpose of chemical analysis through measurement of absorption spectra associated with rota…

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…