The results revealed that both sucrose concentration and yeast concentration affected themitigation of acrylamide during the fermentation. It was concluded that acrylamide reductionwas the result of its metabolic conversion by the yeast. Any increment in sucrose concentration enhances the activity of yeast cells, hence the degradation of acrylamide. Another
reason for the mitigation of acrylamide during fermentation could be the adsorption ofmolecules by the yeast cells. If acrylamidemitigation were a matter of adsorption, its reduction rate would be much higher when more yeast cells were added into the fermentation medium. Also previously, in several studies performed with different bacteria, it was
shown that acrylamidewas converted into acrylic acid by themetabolism of microorganisms. A strain of Rhodococcus erythropolis (Hirrlinger, Stolz & Knackmuss, 1996) could degrade acrylamide to acrylic acid and ammonia. Nawaz et al. (1994) described an isolate of Rhodococcus sp. that was highly specific in degrading acrylamide. It was stated that an aliphatic amidase (amidohydrolase, EC 3.5.1.4) is known to participate in the deamination of acrylamide to acrylic acid and ammonia in these microorganisms (Nawaz, Billedeau, & Cerniglia, 1998). Also a strain of Rhodopseudomonas palustris was shown to be capable of degrading acrylamide to acrylic acid and propionate (Wampler & Ensign, 2005). However, to the best of our knowledge, there is no study about the fate of acrylamide during S. cerevisiae fermentation.