Comparison of quality parameters of Czech and foreign hop varieties
| Autor: | K. Krofta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Plant, Soil and Environment, Vol 49, Iss 6, Pp 261-268 (2003) |
| Druh dokumentu: | article |
| ISSN: | 1214-1178 1805-9368 |
| DOI: | 10.17221/4123-PSE |
| Popis: | Market varieties of hops are classified to several groups according to their use in the brewing industry - aroma, bitter (dual-purpose), high-alpha ones. Saaz and other genetically related varieties form a separate group among the aromatic hops. The group called fine aroma hops has a low content of a-bitter acids (3-4% w/w), its content of b-bitter acids is in the range of 4-7% w/w and cohumulone ratio in the interval of 23-26% rel. The composition of hop oils is characterised by the content of b-farnesene in the range of 15-20% rel. and trans-a-bergamotene at the amount of ca. 1% rel. Most market varieties of hops are of hybrid origin. It holds true about the Czech varieties Sládek, Bor, Premiant and Agnus. The content of a-bitter acids in bitter varieties is in the range of 7-10% w/w while the content of a-bitter acids in high-alpha hops is higher than 10% w/w. |
| Databáze: | Directory of Open Access Journals |
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