| Title: | Molecular Insights into the Contribution of Specialty Barley Malts to the Aroma of Bottom-Fermented Lager Beers |
| Author(s): | Fechir M; Reglitz K; Mall V; Voigt J; Steinhaus M; |
| Address: | "Trier University of Applied Sciences, Schneidershof, 54293 Trier, Germany. Leibniz Institute for Food Systems Biology at the Technical University of Munich (Leibniz-LSB@TUM), Lise-Meitner-Strasse 34, 85354 Freising, Germany" |
| ISSN/ISBN: | 1520-5118 (Electronic) 0021-8561 (Linking) |
| Abstract: | "Specialty barley malts provide unique aroma characteristics to beer; however, the transfer of specialty malt odorants to beer has not yet been systematically studied. Therefore, three beers were brewed: (1) exclusively with kilned base barley malt, (2) with the addition of a caramel barley malt, and (3) with the addition of a roasted barley malt. Major odorants in the beers were identified by aroma extract dilution analysis followed by quantitation and calculation of odor activity values (OAVs). The caramel malt beer was characterized by outstandingly high OAVs for odorants such as (E)-beta-damascenone, 2-acetyl-1-pyrroline, methionol, 2-ethyl-3,5-dimethylpyrazine, and 4-hydroxy-2,5-dimethylfuran-3(2H)-one, whereas the highest OAV for 2-methoxyphenol was obtained in the roasted malt beer. Quantifying odorants in the malts revealed that the direct transfer from malt to beer played only a minor role in the amount of malt odorants in the beers, suggesting a substantial formation from precursors and/or a release of encapsulated odorants during brewing" |
| Keywords: | Beer/analysis Guaiacol *Hordeum Indicator Dilution Techniques Odorants/analysis *Volatile Organic Compounds/analysis Hordeum vulgare aroma extract dilution analysis (AEDA) odorant transfer specialty barley malt beer stable isotopically substituted odorant; |
| Notes: | "MedlineFechir, Michael Reglitz, Klaas Mall, Veronika Voigt, Jens Steinhaus, Martin eng 2021/07/16 J Agric Food Chem. 2021 Jul 28; 69(29):8190-8199. doi: 10.1021/acs.jafc.1c01846. Epub 2021 Jul 15" |
