The phenolic content and antioxidant activity of the aqueous and hydroalcoholic extracts of hops and their pellets
作者： Dariusz Kowalczyk , Michał Świeca , Joanna Cichocka , Urszula Gawlik-Dziki
DOI: 10.1002/JIB.73
关键词:
摘要: The goal of this study was to investigate how three commonly used systems (water, 50% methanol and ethanol) affected the yields phenolic substances antioxidant capacity extracts prepared from hops (cv Magnum Marynka) their pellets (T90 T45). total (TPC) flavonoid contents (TFC), as well activity (ABTS+• scavenging, reducing power metal chelating activity) hydroalcoholic were found be significantly higher than those aqueous extracts. Extraction using ethanol produced highest yield flavonoids. In turn, aqueous–methanol a better source chlorogenic acid. No significant differences in terms TPC TFC between when water for extraction. Aqueous–ethanol T45 pellets, regardless hop variety, exhibited compared with T90 pellets. For extracts, such tendency not observed. revealed that cv Marynka had Magnum, which resulted potential. Hydroalcoholic type alcohol product, did differ activities. Copyright © 2013 Institute Brewing & Distilling
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