Porter-Silber reaction

Porter-Silber reaction
the reaction of the dihydroxyacetone side chain of certain 17-hydroxycorticosteroids (Porter-Silber chromogens) with phenylhydrazine in acid, which produces a yellow color; an index of adrenocortical function now largely supplanted by immunoassay techniques.

Medical dictionary. 2011.

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  • Porter-Silber chromogen — a 17 hydroxycorticosteroid with a dihydroxyacetone side chain; these react positively in the Porter Silber reaction …   Medical dictionary

  • Porter-Silber chromogens reaction — Por·ter Sil·ber chromogens, reaction (porґtər silґbər) [Curt Culwell Porter, American biochemist, 20th century; Robert Howard Silber, American biochemist, 20th century] see under chromogen and reaction …   Medical dictionary

  • Porter — Curt C., U.S. biochemist, *1914. See P. Silber chromogens, under chromogen, P. Silber reaction, P. Silber chromogens test. Thomas C., British scientist, 1860–1933. See Ferry P. law. William H., Irish surgeon, 1790–1861. See P. fascia …   Medical dictionary

  • Silber — Robert H., U.S. biochemist, *1915. See Porter S. chromogens, under chromogen, Porter S. reaction, Porter S. chromogens test …   Medical dictionary

  • reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …   Medical dictionary

  • test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

  • 17-hydroxycorticosteroid — 17 hy·droxy·cor·ti·co·ste·roid .sev ən tēn hī .dräk sē .kȯrt i kō sti(ə)r .ȯidalso ste(ə)r n any of several adrenocorticosteroids (as cortisol) with an OH group and an HOCH2CO group attached to carbon 17 of the fused ring structure of the… …   Medical dictionary

  • chromogen — 1. A substance, itself without definite color, that may be transformed into a pigment; denoting especially benzene and its homologs toluene, xylene, quinone, naphthalene, and anthracene, from which the aniline dyes are manufactured. 2. A …   Medical dictionary

  • literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …   Universalium

  • Radiation chemistry — is a subdivision of nuclear chemistry which is the study of the chemical effects of radiation on matter; this is very different from radiochemistry as no radioactivity needs to be present in the material which is being chemically changed by the… …   Wikipedia

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