| Autor: |
Alexandr Mikyška, Marie Jurková |
| Jazyk: |
Czech<br />English |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Kvasný průmysl, Vol 65, Iss 6, Pp 178–185-178–185 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2570-8619 |
| DOI: |
10.18832/kp2019.65.178 |
| Popis: |
Many studies have confirmed hops (Humulus lupulus L.) as the source of a number of physiologically active polyphenols, important for both brewing and potentially pharmaceutical purposes. The three-year screening of polyphenols and 23 free phenolics profile (HPLC/coulometric detection) showed a significant association of polyphenols and free phenolics with DPPH antioxidant potential and the genetically determined specificity of free phenolics composition in hops. Varieties of American origin have a different profile compared to European varieties. For the first time, the free phenolics hydroxycoumarins were detected in hops. The DPPH strongly correlated with total polyphenols and flavanoids (n = 95, r = 0.92, 0.93 respectively) and correlated negatively with alpha acids (n = 95, r = -0.73). The polyphenols and the DPPH decrease with increasing alpha acids both among varieties and within one variety. These findings can serve as a useful tool for hop selection in brewing or pharmaceutical production. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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