Kvasny Prumysl, 2010 (vol. 56), issue 1
The content of hop prenylflavonoids in czech and foreign beers.Peer-reviewed article
Karel KROFTA
Kvasny Prum. 2010; 56(1): 2-9 | DOI: 10.18832/kp2010001 
The content of isoxanthohumol (IX) in most of Czech and foreign beer brands did not exceed the limit of 2000 g.l-1. The concentration of xanthohumol (XN) was up to 100 g.l-1. The largest quantities of prenylflavonoids in all beers investigated were found in Czech dark 12 % lager (2522 g.l-1 IX and 505 g.l-1 XN). On average less prenylflavonoids were found in draught and alcohol-free beer brands due to the lower hopping rate and the higher proportion of CO2-extracts. Choosing a hop variety with a higher XN/-acids ratio can influence the level of IX in the beer. The amount of prenylflavonoids in beers increases if Sladek and Saazer are used for...
Quality of malting barley crop 2009 in the Czech Republic.Peer-reviewed article
Ivo HARTMAN, Josef PROKEŠ, Alena HELÁNOVÁ
Kvasny Prum. 2010; 56(1): 10-17 | DOI: 10.18832/kp2010002
The study evaluates quality of malting barley from harvest 2009 in the Czech Republic. It maps significant factors (weather conditions, occurrence of diseases and pests, varietal composition, barley yield) affecting the final quality of malting barley. Based on the evaluation of barley and malt produced under the laboratory conditions, it is possible to state that barleys from harvest 2009 indicate an average malting year.The study evaluates quality of malting barley from harvest 2009 in the Czech Republic. It maps significant factors (weather conditions, occurrence of diseases and pests, varietal composition, barley yield) affecting the final quality...
Analysis of polyphenols in brewing raw materials by PSE (Pressurized Solvent Extraction) - and by HPLC method with CoulArray detection.Peer-reviewed article
Marie JURKOVÁ, Vladimír KELLNER, Jiří ČULÍK, Tomáš HORÁK, Pavel ČEJKA, Pavel KARÁSEK
Kvasny Prum. 2010; 56(1): 18-23 | DOI: 10.18832/kp2010003
The modern extraction technique PSE (Pressurized Solvent Extraction) - pressure solvent extraction coupled with HPLC with high sensitive electrochemical detector CoulArray - presents the progress in the analytics of polyphenols in brewer's raw materials. It could be simulated extraction processes malting and hop boiling by method PSE by force of "markers" which are extracted in both extraction procedures practically equally. The PSE method is better to estimation of entire content of polyphenols in malt and hops. The variability of extraction process enables to find the optimal extraction conditions for maximal yields. The most efficient temperature...
Brewery Radvanice.Peer-reviewed article
Milan STAREC
Kvasny Prum. 2010; 56(1): 24-27 | DOI: 10.18832/kp2010004
The brewery in Radvanice was established by Josef Neumann in 1858. In 1871 cellars and fermenting cellar with iceboxes were built, subsequently the brewery was reconstructed to a steam-driven facility. In 1887-1888 the malting floor was extended and a modern malthouse with a large two-floor kiln was built. The first known output in 1871 was 8 658 hl and gradually it was increased to approximately 25 000 hl at the beginning of the 1890s. In 1901 the malthouse was equipped with modern barley and malt cleaning machinery. In 1908 the brewery was bought by a Vienna workers' union named the "First Moravian-Silesian Workers' Brewery Skaret and comp. in Radvanice"....