and the strainconsumed the previously accumulated into the growth mediumethanol toward the formation of new cell material. On the otherhand, in all trials, glucose was consumed within 52 h after inocula-tion with relatively comparable consumption rates (Fig. 3b), sincevirtually the microbial metabolism was directed toward the accu-mulation of ethanol into the culture medium in spite of the fact thatoxygen (in shake-flask and aerated batch-bioreactor trials) existedinto the medium (this is the so-called “Crabtree” or “glucose”effect – see: Ratledge, 1991). Moreover, comparing non-aeratedand aerated bioreactor trials, it was seen that ethanol productionslightly increased by means of EtOHmaxvalues in the trial under no