shows the solid residue yields
(S.R.) and the total organic carbon (TOC) yields in aqueous phase.
The pronounced effect oftemperature on converting xylose to lactic
acid was obvious: the lactic acid yield consistently increased with
the increase of temperature. However, the lactic acid yields varied
little at temperatures above 200 ◦C, although the maximum lactic
acid yield was achieved at 240 ◦C. In contrast, as shown in