Analysis of 100-Year-Old Beer Originated from the Czech Republic

0474898 - MBÚ 2018 RIV US eng J - Článek v odborném periodiku
Olšovská, J. - Matoulková, D. - Dušek, M. - Felsberg, Jürgen - Jelínková, Markéta - Čejka, P. - Štěrba, K.
Analysis of 100-Year-Old Beer Originated from the Czech Republic.
Journal of Agricultural and Food Chemistry. Roč. 65, č. 16 (2017), s. 3342-3351. ISSN 0021-8561. E-ISSN 1520-5118
Institucionální podpora: RVO:61388971
Klíčová slova: beer aging * carbonyl compounds * transformation of isohumulones
Obor OECD: Microbiology
Impakt faktor: 3.412, rok: 2017

Three bottles of different beers were found in 2015 during a reconstruction of the brewery of the Raven Trading s.r.o. company in Zahlinice, Czech Republic. Thanks to good storage conditions, it was possible to analyze their original characteristics. All three bottles contained most probably lager type beer. One beer had sulfuric and fecal off-flavors, it was bright with the original extract of 10.3 degrees Plato. The second beer, with an original extract of 7.6 degrees Plato, was dark and very acidic, resembling Iambic. DNA analysis proved the presence of Dekkera bruxellensis, which corresponded to its chemical profile (total acidity, FAN, ethyl acetate, total esters). The third beer contained traces of carbon dioxide bubbles, was light brown and slightly bitter, with an original extract 10.4 degrees Plato. Because it obviously underwent a natural aging process, sweetness, honey, and fruity off-flavors were detected and transformation products of iso-alpha-acids were found.
Trvalý link: http://hdl.handle.net/11104/0271810