Abstract
The isomerization of D-glucose in mixed ethanol-water was studied at various reaction temperatures (40–70 °C), employing glucose isomerase fromStreptomyces phaeochromogenes andClostridium thermohydrosulfuricum, respectively. The thermophilicClostridium enzyme was considerably, more stable towards the combination of organic cosolvent and increased temperature and with this enzyme a 55% yield of fructose from glucose was obtained at relatively low concentration of ethanol (40 %).
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