Kvasny Prumysl, 2012 (vol. 58), issue 9
Barley varieties registered in the Slovak Republic in 2012.Peer-reviewed article
Vratislav PSOTA, Lenka SACHAMBULA, Marián SVORAD, Štefan DRÁB
Kvasny Prum. 2012; 58(9): 250-255 | DOI: 10.18832/kp2012023 
During 2009-2011, the spring barley malting varieties IS Carmenta, IS Castor, Despina, SU Flipper, Jazz, Laudis, Signum, and Zhana were assessed in the CCTIA Bratislava and RIBM Brno. Malting quality of all the varieties studied got near the standard varieties Nitran and Xanadu. Nearly all the studied varieties had extract content higher or at the comparable level as the standard variety Nitran, and four varieties exceeded also the standard variety Xanadu with the value of extract 83.6 %. The values of amylolytic and cytolytic modification were in new varieties at a good to optimal levels. The level of proteolytic modification was also higher. The...
Year prognoses of the alpha acid contents in Czech hops.Peer-reviewed article
Karel KROFTA, Alexandr MIKYŠKA, Jana TICHÁ
Kvasny Prum. 2012; 58(9): 256-263 | DOI: 10.18832/kp2012024
A content of alpha acids which is from brewing and commercial point of view, the most important quality parameter of hops, is subjected to distinctive year-to-year fluctuations. It is therefore requires well-timed and reliable information about quality of current crop harvest. Introduced system of alpha acids content evaluation in Czech hops consists of pre-harvest and harvest prognoses and detailed examination of true values. Assessment system is differentiated according to varieties and hop growing regions. This study summarizes the results of year prognoses of alpha acid contents in Czech hops for more than last 15 years. Predicted values compares...
Abrasive wear of steel materials in fermentation industry.Peer-reviewed article
Jiří VOTAVA
Kvasny Prum. 2012; 58(9): 264-268 | DOI: 10.18832/kp2012025
Machine equipment in fermentation industry suffers from the mechanical wear of mobile elements and from the corrosion degradation. Especially concerned are lines for filling kegs and bottles and labelling machines. Thus the effort of technical designers is to replace classic steels by corrosion-proof materials. The aim of this paper is to compare corrosion resistance of standard used steel C45E with the anticorrosion steel X20Cr13 and X5CrNi 18-10. Tests were carried out on samples which were heat treated according to the producer's recommendations. Samples which were non heat treated serve as measurement standards. Abrasive wear was tested using the...