In addition to ethanol, several other alcohols
may be found in beer and related products, and may
contribute significantly to flavor. The higher alcohols
identified in pito were 3-methylbutanol, geraniol
and guaiacol. 3-methylbutanol was present in only
48-hour single culture fermentations. Guaiacol was absent in 48 hours of both yeast type fermentation,
while geraniol was present in all samples. Alcohols
achieve maximum concentrations in fermenting wort
at a time roughly coincident with the point at which
free amino nitrogen falls to a minimum (Briggs et al.,
2004). The composition of the wort, in particular the
amino nitrogen content, yeast strain and fermentation
temperature affect the production of higher alcohols
in the beer