Celldensitiesweremeasuredat525nmafterdiluting
cellsfrom0.05to0.5opticaldensity(OD).AnODof1.0
wasequivalentto 0.21mgdryweightofcells/ml. Ethanol wasseparated by gas chromatography (Jeries,
1982).Sugarsandotherfermentationbyproductswere
determinedbyhighperformanceliquidchromatography
(HPLC) (Verhaar andKuster,1981).Theamountsof
hexosesandpentosesin the woodhydrolyzatesamples,
such asglucose, galactose,mannose,andxylose, were
determinedbyHPLCandexpressedastotalfermentable
sugars. Theamountofarabinosequanti®edin thewood
hydrolyzate wasexpressedseparately