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L-Arabinose Production from Diluted Sulfuric Acid Hydrolysis of Corn-fiber  

Lee, Hyung-Joo (Department of Molecular Science and Technology, Ajou University)
Lee, Won-Kyu (Department of Molecular Science and Technology, Ajou University)
Ryu, Yeon-Woo (Department of Molecular Science and Technology, Ajou University)
Publication Information
KSBB Journal / v.22, no.4, 2007 , pp. 201-206 More about this Journal
Abstract
The demand of L-arabinose has been increased recently because of its advantages including clinical effect. L-arabinose can be produced from dilute acid hydrolysis of agricultural wastes. In this study, optimum conditions of L-arabinose production using dilute acid hydrolysis of agricultural wastes and nutshells were determined. Among the tested various agricultural wastes and nutshells, corn fiber was selected as the best raw material for the production of arabinose. The highest arabinose production was achieved an acid hydrolysis of corn fiber for 1 h at 130$^{\circ}C$ with 0.4% sulfuric acid. Above optimal conditions, it was obtained 20.1 g/L glucose, 10.1 g/L xylose, 7.8 g/L arabinose and 1.8 g/L galactose from 90 g/L of corn fiber. For the purification of arabinose, it was carried out to remove all of sugars except arabinose by the Candida tropicalis cultivation of acid hydrolyzate and an organic contaminants such as pigments by the active carbon treatment of fermentation broth. Moreover, experiments were carried out to eliminate an ions by exchange chromatography. Finally, we obtained 3.1 g of partially purified L-arabinose powder with about 40% yield by evaporation and vacuum drying.
Keywords
L-arabinose; corn fiber; Candida tropicalis; xylose;
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