Changes in hop (Humulus lupulus L.) oil content and composition during long-term storage under different conditions

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

Hop essential oil, in addition to alpha-acids, is one of the most valuable parameters for brewers, since it is responsible for beer aroma. The hop oil content and hop oil chemical composition deliver various aromas to beer. During storage, the hop chemical composition undergoes many physical and chemical changes that impact its quality. The main purpose of our study was to evaluate the changes occurring in hop oil content and its chemical composition during two years of storage under four different conditions (anaerobic, aerobic, cold room (4 °C), and room temperature) in the form of cones and pellets, supplied by local suppliers in Slovenia. Hop oil content and composition were determined by steam distillation and GC-FID. The greatest decrease in hop essential oil content occurred when the hops were stored under aerobic conditions and at room temperature. Monitoring of eight hop oil compounds under various conditions revealed different behaviors of the changes. The best storage conditions were anaerobic at low temperatures. Oxygen resistance was lower for pellets than for hop cones, whereas high temperature was more devastating for hop cones. In addition to the storage conditions, the hop variety and form were important factors regulating the extent of changes in hop oil content and chemical composition.

• Jezik: Angleški jezik
• Ključne besede: hops, storage stability, essential oils, hop oil composition
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 20 str.
• Številčenje: Vol. 11, iss. 19, art. 3089
• PID: 20.500.12556/RUL-155484
• UDK: 633.791
• ISSN pri članku: 2304-8158
• DOI: 10.3390/foods11193089
• COBISS.SI-ID: 128588291
• Datum objave v RUL: 04.04.2024

Gradivo je del revije

• Naslov: Foods
• Skrajšan naslov: Foods
• Založnik: MDPI
• ISSN: 2304-8158
• COBISS.SI-ID: 512252472

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: hmelj, skladiščenje, eterična olja, sestava

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: 603-1/2019-15

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: Z4-2655
• Naslov: Proučevanje vplivov staranja hmelja na lastnosti piva