Abstract
Optimization of utilizable extract from raw materials is a high priority
in both potable and industrial alcohol production. In brewing, free amino
nitrogen (FAN) is a predictor of fermentation efficiency and, to maximize
its extraction from raw materials, it is important to identify the points in
the malting or brewing process where it is formed. In this study, 28 types
of two-row malted barley were examined before and after mashing, to
determine their amino acid and ammonia composition. Overall, 88% of
the total yeast utilizable nitrogen present in wort was a product of
endosperm degradation during malting barley germination. The
remaining 12% was formed during the mashing stage. Significantly,
methionine and aspartic acid, important nitrogen sources for healthy
fermentation, were found to be minor amino acids in the malted grain.
Consequently, mashing conditions should be optimized for the production
of these amino acids from endosperm degradation.
in both potable and industrial alcohol production. In brewing, free amino
nitrogen (FAN) is a predictor of fermentation efficiency and, to maximize
its extraction from raw materials, it is important to identify the points in
the malting or brewing process where it is formed. In this study, 28 types
of two-row malted barley were examined before and after mashing, to
determine their amino acid and ammonia composition. Overall, 88% of
the total yeast utilizable nitrogen present in wort was a product of
endosperm degradation during malting barley germination. The
remaining 12% was formed during the mashing stage. Significantly,
methionine and aspartic acid, important nitrogen sources for healthy
fermentation, were found to be minor amino acids in the malted grain.
Consequently, mashing conditions should be optimized for the production
of these amino acids from endosperm degradation.
| Original language | English |
|---|---|
| Pages (from-to) | 6-11 |
| Number of pages | 6 |
| Journal | Journal of the American Society of Brewing Chemists |
| Volume | 72 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Mar 2014 |
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Anne Elizabeth Hill
- School of Engineering & Physical Sciences - Professor
- School of Engineering & Physical Sciences, Institute of Biological Chemistry, Biophysics and Bioengineering - Professor
Person: Academic (Research & Teaching)