The Sugars of the Roots of Daucus carota

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Abstract
Carrot tissue was extracted with 80% boiling alcohol. The aqueous extract was cleared with basic lead acetate and disodium phosphate. Using the 2 reduction methods (the copper and ferricyanide) glucose, fructose, and sucrose were found and estimated in the clear extract. Maltose was entirely absent. Trials for fermenting various sugars with ordinary baker''s yeast were attempted. Glucose, fructose, and sucrose were completely fermented in less than three hours. Maltose was more resistant than the three mentioned sugars. It was almost equally rapidly fermented when a solution of Takadiastase was added to the yeast suspension. The pentoses, arabinose and xylose, were not attacked by the yeast used. The yeast technique was applied to carrot tissue extract for separating the non-fermentable reducing matter which was generally taken for reducing sugars.

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