Augustin-Pierre Dubrunfaut (;

Lille Lille (, ; ; ; ; ) is a city in the northern part of France, within French Flanders. Positioned along the Deûle river, near France's border with Belgium, it is the capital of the Hauts-de-France Regions of France, region, the Prefectures in F ...

, 1 September 1797 –

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

, 7 October 1881) was a French chemist. Mutarotation was discovered by Dubrunfaut in 1844, when he noticed that the specific rotation of aqueous sugar solution changes with time. In the same paper, he also identified that the inversion of sucrose in the presence of brewer's yeast (''Saccharomyces cerevisiae'') was not a consequence of fermentation. The organic

fructose Fructose (), or fruit sugar, is a Ketose, ketonic monosaccharide, simple sugar found in many plants, where it is often bonded to glucose to form the disaccharide sucrose. It is one of the three dietary monosaccharides, along with glucose and gal ...

molecule was subsequently discovered by Dubrunfaut in 1847. He also discovered

maltose } Maltose ( or ), also known as maltobiose or malt sugar, is a disaccharide formed from two units of glucose joined with an α(1→4) bond. In the isomer isomaltose, the two glucose molecules are joined with an α(1→6) bond. Maltose is the tw ...

, although this discovery was not widely accepted until it was confirmed in 1872 by Cornelius O'Sullivan.

Works

* ''Art de fabriquer le sucre de betteraves, contenant 1. la description des meilleures méthodes usitées pour la culture et la conservation de cette racine''openlibrary.org
/ref> * ''Traité complet de l'art de la distillation'' Paris: Bachelier, 1824

References

19th-century French chemists 1797 births 1881 deaths {{France-chemist-stub fr.wikipedia.org Augustin-Pierre Dubrunfaut