KARAKTERIZACIJA ETERIČNEGA OLJA SORTE HMELJA BOBEK.

Hop is perennial dioecious plant classified in the family Cannabinaceae. Because of the bitterness, hop aroma and antimicrobic effect influencing its time stability it is important for brewing industry. Components of hop essential oil tend to provide fruity, floral, citrus, herbal and spicy/woody odours. In our work the quantity and composition of a particular essential oil fractions as a function of distillation time were determined. Selected samples in the research were those of Slovenian hop variety Bobek, harvest 2011. Based on the compostition and aroma of whole oils and its fractions, variety Bobek was estimated as high quality. For the essential oil of Bobek we found out that it has a pleasant sweet, herbal odour. Most pleasant smell of fractions was at 60 minutes of distillation - it was fresh, herbal and sweet. [ABSTRACT FROM AUTHOR]

Hmelj je trajna dvodomna rastlina iz družine konopljevk. Za proizvodnjo piva je pomemben zaradi svoje grenčice, arome in antimikrobnega učinka, ki vpliva tudi na obstojnost piva. Spojine eteričnega olja hmelja vplivajo na aromo piva v smislu sadne, cvetlične, citrusne, zeliščne in tipično hmeljne note. V raziskavi smo določali količino in sestavo posameznih frakcij eteričnega olja v odvisnosti od časa destilacije. Za vzorec smo izbrali slovensko sorto hmelja Bobek, letnik 2011. Glede na sestavo in aromo celotnega olja ter njegovih frakcij smo sorto Bobek ocenili kot zelo kvalitetno. Za eterično olje Bobka smo ugotovili, da ima prijetno sladek, zeliščni vonj. Najprijetnejši vonj med frakcijami je bil po 60 minutah destilacije - ta je bil svež, zeliščni in sladkast. [ABSTRACT FROM AUTHOR]