Schardinger reaction

Schar·din·ger re·ac·tion

(shar'ding-ĕr),
the reduction of methylene blue to methylene white by formaldehyde is rapidly catalyzed by fresh milk but not by boiled milk, the catalyzing agent being xanthine oxidase (Schardinger enzyme); an example of oxidation in the absence of O2 with an organic hydrogen acceptor (the dye).

Schardinger,

Franz, Austrian scientist, 1853-1920.
Schardinger dextrins - the result of action of Bacillus macerans on starch.
Schardinger enzyme - a flavoprotein containing molybdenum. Synonym(s): xanthine oxidase
Schardinger reaction - an example of oxidation in the absence of O2 with an organic hydrogen acceptor.