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Process of using a rotating machine to generate centrifugal force to separate substances of different densities, remove moisture, or simulate gravita…

Separation of particles according to density by employing a gradient of varying densities. At equilibrium each particle settles in the gradient at a …

A technique used to separate particles according to their densities in a continuous density gradient. The sample is usually mixed with a solution of …

Centrifugation using a rotating chamber of large capacity in which to separate cell organelles by density-gradient centrifugation. (From McGraw-Hill …

Cerebrospinal fluid pleocytosis used as a ClinicalGraph target concept for lab_medicine / lab_finding.

Separation of a mixture in successive stages, each stage removing from the mixture some proportion of one of the substances, for example by different…

The formation of a solid in a solution as a result of a chemical reaction or the aggregation of soluble substances into complexes large enough to fal…

Methodologies used for the isolation, identification, detection, and quantitation of chemical substances.

The use of statistical and mathematical methods to analyze chemical observations and phenomena, such as epidemiological analysis of spectroscopically…

A method for diagnosis of fetal diseases by sampling the cells of the placental chorionic villi for DNA analysis, presence of bacteria, concentration…

Techniques used to separate mixtures of substances based on differences in the relative affinities of the substances for mobile and stationary phases…

A chromatographic technique that utilizes the ability of biological molecules, often ANTIBODIES, to bind to certain ligands specifically and reversib…

A method of gel filtration chromatography using agarose, the non-ionic component of agar, for the separation of compounds with molecular weights up t…

A type of ion exchange chromatography using diethylaminoethyl cellulose (DEAE-CELLULOSE) as a positively charged resin. (From McGraw-Hill Dictionary …

Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types a…

Chromatography on non-ionic gels without regard to the mechanism of solute discrimination.

Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.

Separation technique in which the stationary phase consists of ion exchange resins. The resins contain loosely held small ions that easily exchange p…

Chromatographic techniques in which the mobile phase is a liquid.

A hybrid separation technique combining both chromatographic and electrophoretic separation principles. While the method was invented to separate neu…

An analytical technique for resolution of a chemical mixture into its component compounds. Compounds are separated on an adsorbent paper (stationary …

A chromatography technique in which the stationary phase is composed of a non-polar substance with a polar mobile phase, in contrast to normal-phase …

A CHROMATOGRAPHY method using supercritical fluid, usually carbon dioxide under very high pressure (around 73 atmospheres or 1070 psi at room tempera…

Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (Mc…

Staining of bands, or chromosome segments, allowing the precise identification of individual chromosomes or parts of chromosomes. Applications includ…

A technique for visualizing CHROMOSOME ABERRATIONS using fluorescently labeled DNA probes which are hybridized to chromosomal DNA. Multiple fluorochr…

A change from planar to elliptic polarization when an initially plane-polarized light wave traverses an optically active medium. (McGraw-Hill Diction…

Organic chemistry methodology that mimics the modular nature of various biosynthetic processes. It uses highly reliable and selective reactions desig…

Laboratory tests demonstrating the presence of physiologically significant substances in the blood, urine, tissue, and body fluids with application t…

Analyses for a specific enzyme activity, or of the level of a specific enzyme that is used to assess health and disease risk, for early detection of …