Ksenija Rutnik (Author), Miha Ocvirk (Author), Iztok Jože Košir (Author)

Abstract

The stability of alpha-acids, beta-acids and hop storage index (HSI) values under different conditions (aerobic/anaerobic, 4 °C/room temperature) was studied in a two-year trial. Six different varieties (Celeia, Aurora, Bobek, Styrian Gold, Savinjski Golding and Styrian Wolf) were used in the form of cones and pellets. Alpha- and beta-acids were determined by HPLC and HSI by spectrophotometry. Anaerobic conditions at 4 °C were best for alpha-acids, beta-acids and HSI values; however, 10–35% of the alpha-acids were still lost after two years. The decline was greater (63–99%) under aerobic conditions and at room temperature. Alpha-/beta-acid ratios increased in hop cones and decreased in hop pellets, whereas HSI values increased in all storage conditions. Overall, the performance was better for pellets than for hop cones. Storage conditions, storage form and hop variety had significant effects on the stability of hop resins.

Keywords

alfa-kisline;beta-kisline;indeks staranja hmelja;stabilnost;Humulus lupulus;hmelj;skladiščenje;alpha-acids;beta-acids;hop storage index;stability;hop storage;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 633.791
COBISS: 142465283 Link will open in a new window
ISSN: 2223-7747
Views: 19
Downloads: 4
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: alfa-kisline;beta-kisline;indeks staranja hmelja;stabilnost;Humulus lupulus;hmelj;skladiščenje;
Type (COBISS): Article
Pages: str. 1-16
Volume: ǂVol. ǂ12
Issue: ǂno. ǂ4, art. 936
Chronology: 2023
DOI: 10.3390/plants12040936
ID: 23376128