biostudies-literatureRutnik KSlovenian Research Agency936https://www.ebi.ac.uk/biostudies/studies/S-EPMC9960943biostudies-literatureUnknown12(4)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 Plants (Basel, Switzerland)The Stability of Hop (<i>Humulus lupulus</i> L.) Resins during Long-Period Storage.PMC9960943603-1/2019-15Z4-2655P1-0242Rutnik KOcvirk MKosir IJfalseThe Stability of Hop (<i>Humulus lupulus</i> L.) Resins during Long-Period Storage.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 2023-01-01T00:00:00Z2023 Feb2025-04-26T08:24:23.623Z2025-04-06T12:43:56.823ZS-EPMC99609433684028310.3390/plants12040936