Ethanol yield [Y_p/s^et (g/g)], xylitol yield [Y_p/s^xy (g/g)], ethanol productivity [Qp (g/L•h)], fermentation efficiency [η (%)], D-xylose consumption (%), cell concentration (g/L), ethanol concentration (g/L) and xylitol concentration (g/L) in D-xylose culture medium assays.

1<p>D-xylose consumption (%) – percentage of initial D-xylose consumed.</p>2<p>Y_p/s^et (g/g) – ethanol yield: correlation between ethanol (ΔP_ethanol) produced and D-xylose (ΔS_xylose) consumed.</p>3<p>Qp (g/L•h) – ethanol productivity: ratio of ethanol concentration (g/L) and fermentation time (h).</p>4<p>η (%) – fermentation efficiency: percentage of the maximum theoretical ethanol yield (0.51 g ethanol/g D-xylose).</p>5<p>Y_p/s^xy (g/g) – xylitol yield: correlation between xylitol (ΔP_xylitol) produced and D-xylose (ΔS_xylose) consumed.</p>6<p>Time when the maximum ethanol production (g/L) value was attained or time of the end of the fermentation experiment.