Preparation of Fructose from Jerusalem Artichoke

Comparative experiments were made of three methods in preparation of fructose from the tuberous roots of Jerusalem artichoke (Helianthus tuberosus L., ) i.e. acid saccharification method, utilizing inulase in the tuberous root itself and another in using substances containing inulase.As a result, a new strain, Fusarium roseum Series, was isolated from Helianthus tuber that possessed the properties of saccharifying the tuber. Its properties were determined. This substance is easily isolated in a pure form and, its saccharification ratio being 97.19%, it converts to fructose virtually all inulin contained in the tuberous root. Application of this substance to the infusion extract of Helianthus tuber gives the best fructose syrup. From this syrup can be obtained 3.1% pure fructose, m.p. 92°, which was determined by the Fehling solution and Seliwanaw reactions and the formation of osazon by methylphenyl-hydrazine.