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Definition of Congo red in English: Congo rednoun mass nounA red-brown azo dye which becomes blue in acidic conditions, used as a chemical indicator and as a stain in histology. Example sentencesExamples - Potassium permanganate incubation caused loss of reactivity with Congo red.
- All eyes studied that had characteristics of amyloid accumulation by hematoxylin-eosin staining were also stained with Congo red.
- The presence of amyloid confirmed histologically by either Congo red or sulfonated Alcian blue stains or by electron microscopy was seen in 8 muscles.
- The chemicals used in making Congo red and the other aniline dyes were primarily derived from the coal-tar waste products of the coal gas and steel industries in Germany's Ruhr Valley.
- The term amyloid refers to proteinaceous, eosinophilic, amorphous material that when stained with Congo red produces a characteristic green birefringence under polarized light.
Definition of Congo red in US English: Congo rednoun A red-brown azo dye which becomes blue in acidic conditions, used as a chemical indicator and as a stain in histology. Example sentencesExamples - The chemicals used in making Congo red and the other aniline dyes were primarily derived from the coal-tar waste products of the coal gas and steel industries in Germany's Ruhr Valley.
- Potassium permanganate incubation caused loss of reactivity with Congo red.
- All eyes studied that had characteristics of amyloid accumulation by hematoxylin-eosin staining were also stained with Congo red.
- The presence of amyloid confirmed histologically by either Congo red or sulfonated Alcian blue stains or by electron microscopy was seen in 8 muscles.
- The term amyloid refers to proteinaceous, eosinophilic, amorphous material that when stained with Congo red produces a characteristic green birefringence under polarized light.
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