The typical fermentation volatiles identified (Table 3) were therefore
formed mainly from the metabolism of yeast. However, many of
the identified fermentation compounds have also been identified
from sourdough (Hansen & Hansen, 1994, 1996) thus questioning if
the compounds presented in Table 3 were formed from the metabolism
of LAB or yeast. Hansen and Hansen (1994) concluded that a
higher number of fermentation compounds were produced during
sourdough fermentation when yeast was added to the sourdough.
Furthermore, the authors found a higher concentration of fermentation
compounds when yeast was added to the sourdough. It is therefore assumed
that the majority of the fermentation compounds identified in
the bread samples in this research work (Table 3) were produced mainly
from the metabolism of yeast.