Kvasny Prumysl, 2013 (vol. 59), issue 7-8
The dependence of malt quality on the variety and year.Peer-reviewed article
Štefan DRÁB, Vratislav PSOTA, Helena FRANČÁKOVÁ, Lenka SACHAMBULA, Jiří HARTMANN, Marián TOKÁR
Kvasny Prum. 2013; 59(7-8): 181-189 | DOI: 10.18832/kp2013018 
Eleven spring barley varieties from harvest years 2009, 2010 and 2011 were studied. Eight basic technological parameters of malt for the determination of malting quality of barley were assessed: content of nitrogenous substances in barley, malt extract, relative extract at 45 °C, Kolbach index, diastatic power, apparent attenuation, friability and β-glucan content in sweet wort. Results of the statistical analysis showed that the variety, year and locality significantly affected the studied parameters and contributed to a variability of the individual parameters from 6.61 % to 60.12 %. The highest effect of the genetic material was recorded in...
VITAL - The Czech hop hybrid variety - Part II.Peer-reviewed article
Karel KROFTA, Alexandr MIKYŠKA, Josef PATZAK, Martin SLABÝ, Vladimír NESVADBA, Pavel ČEJKA
Kvasny Prum. 2013; 59(7-8): 190-197 | DOI: 10.18832/kp2013019
In the last few years brewing tests with hop products of the Vital variety (hop pellets T90 and a CO2-extract) were carried out at different levels: from a pilot scale trial to a full scale trial. From the experimental beers produced no negative effects such as changes in the character of bitterness, colour, foaming power, off-flavour or foreign odours were found. The best results were achieved when combined hopping with Czech aromatic varieties Saaz, Sladek and Harmonie were used. The most promising hop product is the CO2-extract because it is possible to utilize spent hops after the extraction for non-brewing applications. The Vital variety with...
Advantages and disadvantages of substitution of helium as carrier gas in gas chromatography by hydrogen. Part II. - Retention time and selectivity.Peer-reviewed article
Tomáš HORÁK, Jiří ČULÍK, Karel ŠTĚRBA, Jana OLŠOVSKÁ
Kvasny Prum. 2013; 59(7-8): 198-202 | DOI: 10.18832/kp2013020
Gas chromatography often uses helium, hydrogen, and nitrogen as carrier gases. The most common carrier gas is helium since it provides good separations, is inert, and is safe to use. In recent years, the availability of helium has decreased and its cost has increased significantly. So, it is necessary to choose a suitable substitution. This article is focused on the chromatographic parameters such as retention time and selectivity after switching to the use of hydrogen or nitrogen.Gas chromatography often uses helium, hydrogen, and nitrogen as carrier gases. The most common carrier gas is helium since it provides good separations, is inert, and is...
Acidification power (AP) test and similar methods for assessment and prediction of fermentation activity of industrial microorganisms.Peer-reviewed article
Karel SIGLER
Kvasny Prum. 2013; 59(7-8): 204-208 | DOI: 10.18832/kp2013021
A brief survey is given of the methods for determining the vitality and fermentation vigor of microorganisms (yeast, bacteria) used in brewing, baking and milk processing industries, with special reference to methods based on proton and/or ion relationships between the cells and the environment. Most of these methods are based on proton extrusion rate (acidification power) under different conditions and cellular traits connected with it, such as intracellular pH.(In English)
Bohemian Breweries Limited - Goldmine or Trap? Part III: New rivals and the bankruptcy.Peer-reviewed article
Libor HRUŠKA
Kvasny Prum. 2013; 59(7-8): 209-212 | DOI: 10.18832/kp2013022
The paper aims to describe the history of the British joint-stock company Bohemian Breweries Limited, which owned three breweries in Prague in the turbulent period of the late 19th century. The last part of the three-part paper describes the foundation of the new rival companies in the Prague suburbs, which, among other things, led to the bankruptcy of the company.(In Czech, English summary only)