Chromogen


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Related to Chromogen: Auxochrome

chromogen

[′krō·mə‚jen]
(biochemistry)
A pigment precursor.
(microbiology)
A microorganism capable of producing color under suitable conditions.

Chromogen

 

according to the color theory devised by O. Witt, a substance containing chromophores—groups of atoms responsible for the coloration of various compounds. The term was also used to designate colorless substances found in animal and plant tissues that become pigments as a result of oxidation. V. I. Palladin proposed the term “respiratory chromogen” as part of his theory of plant respiration in reference to substances that become pigments through reversible oxidation. The equivalent Russian term is no longer used in the literature.

References in periodicals archive ?
After three more washes with HRP wash concentrate, the enzyme reaction was developed by adding tetramethylbenzene chromogen and incubating in the dark for 30 minutes at room temperature.
Aminoethylcarbazole was used as chromogen, and sections were counterstained with hematoxylin.
This additive is believed to assist the formation of the chromogen by in 2 ways: (i) the destruction of hydroxylamine produced during the hydrolysis of diacetyl monoxime to diacetyl, and (ii) catalysis of the reaction, allowing less acid to be used (Taylor and Vadgama 1992).
Staining was then visualized by using 3,3'-diaminobenzidine chromogen.
8% and specificity of 100% using a single chromogen for all 3 antibodies.
Determination of blood glucose using an oxidase-peroxidase system with a non-carcinogenic chromogen.
This dual chromogen medium enables the isolation of Salmonellae (including Salmonella typhi and S.
Determination of blood glucose using an oxidase peroxidase system with a non-carcinogenic chromogen.
The formaldehyde produced is measured spectrophotometrically with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (Purpald) as the chromogen (Wheeler et al.
The chromogen, 3-methyl-2benzothiazolinone hydrazone (MBTH, Sigma Aldrich) was added to the substrate.
The interference by reducing compounds such as ascorbic acid primarily consists of either competition with the chromogen in the peroxidase-catalyzed reaction of hydrogen peroxide or bleaching of the color being formed.
0 ml of working solution [containing one part of chromogen solution (ferrozine 40 mmol/L and sodium acetate 400 mmol/L) and four parts of buffer/reductant solution (Guanidine chloride 1.