chromogen

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chromogen

 [kro´mo-jen]
any substance, itself without color, giving origin to a coloring matter.

chro·mo·gen

(krō'mō-jen),
1. A substance, itself without definite color, which may be transformed into a pigment; denoting especially benzene and its homologues toluene, xylene, quinone, naphthalene, and anthracene, from which the aniline dyes are manufactured.
2. A microorganism that produces pigment.
3. A compound, containing a chromophore, which is colorless if that chromophore is removed.

chromogen

/chro·mo·gen/ (kro´mah-jen) any substance giving origin to a coloring matter.

chromogen

(krō′mə-jən)
n.
1. Chemistry A substance capable of conversion into a pigment or dye.
2. Biology A strongly pigmented or pigment-generating organelle, organ, or microorganism.

chro′mo·gen′ic (-jĕn′ĭk) adj.

chromogen

[krō′mōjən]
a substance that absorbs light, producing color.

chromogen

Chromagen A chemical or compound that reacts to produce a colored end-product, used to detect the presence of a substance of interest; chromogens are critical detectors in immunoenzymatic reactions. See Porter-Silber chromagen.

chro·mo·gen

(krō'mō-jen)
1. A substance, itself without definite color, which may be transformed into a pigment.
2. A microorganism that produces pigment.

chromogen

any substance giving origin to a coloring matter.
References in periodicals archive ?
By IR spectroscopy of the organic extract used we could determine the chromogen IV, probably 6-bromo-2 methylsulfonylindoxylsulfate, as a substance responsible for the free radical scavenging activity.
We could determine by IR spectroscopy the chromogen IV, described by Fouquet (1970) as 6-bromo-2 methylsulfonylindoxylsulfate, as a substance responsible the for the free radical scavenging activity.
The complex is then visualized with a hydrogen peroxide substrate and 3, 3'-diaminobenzidine tetrahydrochloride (DAB) chromogen, which produces a dark brown precipitate, readily detected by light microscopy.
A linear calibration was verified for the two chromogens for iron concentrations of 0.
The HIC of 66 patients with chronic liver disease was determined using the two chromogens.
Comparison of the two methods by Passing-Bablok analysis showed that results obtained with the two chromogens were correlated.
A colorimetric method using bathophenanthroline sulfonate as chromogen was recommended in 1978 by the International Committee for Standardization in Hematology (ICSH) for determination of serum iron (4,5).
Isolation and quantification of the MDA-TBA adduct by HPLC reportedly largely eliminates the interfering chromogens [19,201.
Importantly, all chromatograms indicated only two chromogens, the red, which always corresponded to the red MDA-TBA adduct irrespective of mobile phase [8,20,21,23,301, and the yellow reactive substance, which coeluted with a peak previously ascribed to an endogenous yellow TBA marker [30].
Examination of the majority of illustrative chromatograms generated from HPLC separation on Cl8 columns of the MDA-TBA adduct [8, 21, 23, 30-32] indicates a remarkable absence of those additional peaks that would be expected if HPLC separated the chromophore of interest from other interfering chromogens.
Chromogen X-Gal detects the presence of [beta]-galactosidase activity in coliforms (including E.