"Red wine, unlike white, contains a highly-pigmented substance known as chromogen," explained Dr. Wolff.    From Wordnik.com.  [Health News from Medical News Today] Reference

Diaminobenzidine (DAB, Sigma) was used as a chromogen at 0.25 mg / ml in TBS with 0. 01\% H.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

(DAKO, Carpinteria, CA) with diaminobenzidine tetrahydrochloride (3,3′-diaminobenzidine) as the chromogen.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

This was followed by a 5-min incubation with the substrate-chromogen, 3,3′-diaminobenzidine (Vector SK-4100).    From Wordnik.com.  [PLoS Medicine: New Articles] Reference

Peroxidase activity was detected by using 3,3′ diaminobenzidine (DAB) as chromogen with hydrogen peroxide as substrate.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Diaminobenzidine (0. 05\%; Sigma) with nickel chloride (0. 04\%) was used as chromogen, with reactions sustained for 10 minutes at room temperature.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Finally, antibody binding was visualised using DAB as the chromogen and the sections mounted in Mowiol for observation under a Nikon 90i microscope.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

After three washes with TBS, the samples were incubated with streptavidin-biotin peroxidase (LSAB kit; Dako) for 10 min using diaminobenzidine tetrahydrochlorideas the chromogen.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Immunostaining was performed with the Lab Vision Autostainer (Lab Vision, Fremont, USA) using a biotin-streptavidin-peroxidase detection system with diaminobenzidine as a chromogen.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Double immunostainings with anti-LMP2/anti-Olig2 and with anti-PA28-α/anti-Olig2 were performed following the previous procedure but employing as second chromogen Perma\Blue AP chromogen (Diagnostic Biosystems, Pleasonton, CA, USA) for alkaline phosphatase.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

After washing, the HRP (horseradish peroxidase) conjugated polymer complex was visualized by incubation for ~5 min with AEC (3-amino-9-ethylcarbazole) substrate-chromogen; sections were then counterstained with hematoxylin for 30 seconds, washed and mounted.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

However much we may learn of chlorophyl, chromogen, and colour-cells – the pigments of nature that are made from earth and rain, air and sun, somewhere in the dark habitation of the roots and the airy galleries of the leaves – we do not know why the same ingredients should clothe one petal with flame and another with blue.    From Wordnik.com.  [The Spring of Joy: A Little Book of Healing] Reference