Results 11 to 20 of about 4,224 (203)
BIOSYNTHESIS OF THE HOP RESINS [PDF]
Journal of the Institute of Brewing, 1961 Sodium acetate labelled with radioactive carbon in the carboxyl group was injected into a hop bine and the radioactive humuione was isolated. From a study of the distribution of the radioactivity within the humuione molecule, it is concluded that this substance arises as a result of the head-to-tail condensation of acetate units.
G A Howard, G A Howard M Sc
exaly +2 more sources
Antimicrobial Activity of Hop Resins
Journal of Food Protection, 1994 The antimicrobial activity of hop resins against Streptococcus salivarius , Staphylococcus aureus (two strains), Bacillus megaterium , Escherichia coli B, and Bacillus subtilis was investigated. However, resistance development was carried out on Streptococcus salivarius , Staphylococcus aureus (two strains), and Bacillus megaterium . The two hop resins
Gerhard J, Haas, Raffi, Barsoumian
exaly +3 more sources
ANTIBACTERIAL ACTIVITY OF HOP BITTER RESINS DERIVED FROM RECOVERED HOPPED WORT [PDF]
Journal of the Institute of Brewing, 1993 The growth of a thermophilic Bacillus sp. (isolated from mash vessels) in sweet wort was significantly inhibited by the addition of recovered hopped wort (centrate). Addition of 2% (v/v) centrate to cultures reduced the specific growth rate (μ) by 98% and growth was completely inhibited at 5% (v/v) level.
N. A. Smith, P. Smith
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THE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY OF HOP RESINS [PDF]
Journal of the Institute of Brewing, 1978 Hop resins are eluted from a specially developed weak anion exchange bonded phase silica using citric acid, methanol, water, mixtures as eluent. Fresh and deteriorated hops and isomerized extracts have been examined. The ratio of the humulone congeners in different hop varieties and the conversion of α-acid to iso-α-acid during the hop boil have been ...
G. E. Otter, L. Taylor
exaly +2 more sources
HOP RESINS AND BEER FLAVOUR IV. OBSERVATIONS CONCERNING HARD RESIN [PDF]
Journal of the Institute of Brewing, 1965 Various autoxidation products of hop resins are described and compared with hard resin fractions. Changes in the resin contents of stored hops and the potential importance of certain hard resin components in the analysis of hops and beer are discussed.
P R Ashurst
exaly +2 more sources
EVALUATION OF HOPS: NEW APPROACH TO THE DETAILED ANALYSIS OF HOP RESINS [PDF]
Journal of the Institute of Brewing, 1956 Gas-liquid partition chromatography of the mixture of fatty acids obtained by oxidizing the α-soft resin of hops constitutes a rapid and accurate method for the determination of the cohumulone, humulone and adhumulone contents of the resin. The proportions of the corresponding colupulone, lupulone and adlupulone in the “β-acids” may be determined ...
G. A. Howard, A. R. Tatchell
+6 more sources
Evaluation of fine aroma Saaz Shine hop variety
Kvasný průmysl, 2022 The Saaz Shine variety was registered in 2019. It was tested in two areas, Chrášťany (no irrigation) and Stekník (with irrigation), between 2017 and 2021. An average hop yield in Stekník is 2.62 t/ha and in Chrášťany it is 2.54 t/ha.
Vladimír Nesvadba +2 more
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Evaluation of Czech hop varieties (Humulus lupulus L.) in a dry area without irrigation
Kvasný průmysl, 2023 Since 2017, a field experiment has been conducted in a dry area with 11 Czech hop varieties. The highest yields were achieved by the Uran variety (2.83 t/ha) and Saaz Shine variety (2.76 t/ha), which also exhibited the lowest yield variability, at 11.17%
Vladimír Nesvadba +3 more
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Agronomy, 2021 This study aims to do a morphological and biochemical characterization of selected wild hop populations from the Banja Luka region, as plant material with potential value for introduction into plant selection.
Danijela Kondić +5 more
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Fermentation, 2021 The aim of the study was to assess the yield of cones and the quality of six hop varieties (“Iunga”, “Lubelski”, “Sybilla”, “Magnum”, “Lomik”, “Marynka”) in terms of their suitability for beer production, under the conditions of the Małopolska Vistula ...
Barbara Sawicka +6 more
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