Congo red


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Congo red

n.
A brownish-red powder, C32H22N6Na2O6S2, used in medicine and as a dye, indicator, and biological stain.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Congo red

n
(Elements & Compounds) a brownish-red soluble powder, used as a dye, a diagnostic indicator, a biological stain, and a chemical indicator. Formula: C32H22N6O6S2Na2
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

Con′go red′


n.
a water-soluble powder, C32H22O6N6S2Na2, used chiefly as a dye, biological stain, and chemical indicator.
[1880–85]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.congo red - a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
solution - a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
acid-base indicator - an indicator that changes color on going from acidic to basic solutions
azo dye - any dye containing one or more azo groups
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Most of these are phenotypic methods which include Congo red assay (CRA), Air liquid interface (ALI), tissue culture plate (TCP) method and Microtiter plate assay (MTPA).
Subsequently, Congo red and crystal violet dyes were applied; and it was observed under the polarized light that areas with amorphous matter accumulation rendered 'apple green reflections with Congo red (Figure 4).
Pathology returned as a benign polypoid mucosa containing deposits consistent with amyloid, but with negative Congo red staining for amyloidosis.
The presence of amyloid was confirmed by Congo red staining, showing apple-green birefringence under polarized light, as well as by a Thioflavin S stain under fluorescence microscopy, which was positive (Figure 3).
The culture media was then subjected to serial dilution up to 106 times and was spread on Congo Red agar media K[H.sub.2]P[O.sub.4] 0.5 g, MgS[O.sub.4] 0.25 g, CMC 20 g, agar 15 g, Congo-Red 0.2 g, and gelatin 2 g; distilled water 1 L and at pH 6.8- 7.2.
The microtitration plate method was optimized using computational fluid dynamics and compared with the Congo red assay.
This study proved selective adsorption of cationic methylene blue (MB) and anionic Congo red (CR) in PA / CFO nanocomposites [13].
Histopathology with Congo red showed positive green-apple birefringence under polarized light, consistent with amyloid deposition and a diagnosis of amyloidosis of the urinary bladder (Fig.
After staining with Congo red, the sample showed diffuse amyloid apple-green deposits when viewed under polarized light (Fig.