Kvasny Prumysl, 1980 (vol. 26), issue 1
Effects of microbial contaminants upon the durability of beer.Peer-reviewed article
O. BENDOVÁ, V. KURZOVÁ
Kvasny Prum. 1980; 26(1): 3-5 | DOI: 10.18832/kp1980001 
The article deals with the results of tests which have been carried out to study quantitative relation between the presence of harmful microbial contaminants and durability of beer. Yeast, lactobacilli and pediococci isolated from beer have been used in experiments and their propagation rates in 10° and 12° beer compared. Similar tests have been carried out with strains kept in the collection of Research Institute of Brewing and Malting Industries inPrague.(In Czech, English summary only)
Azeotropic liberation of spirit components of the first distillation fraction in the rectification process. Chromatographic analysis of the first distillation fractions of spirit made of molasses.Peer-reviewed article
I. AUGUZSTYNOWICZ
Kvasny Prum. 1980; 26(1): 5-10 | DOI: 10.18832/kp1980002
By applying his own analytic method the author has identified in the first fraction of distillation process of molasses spirit 13 components with different boiling points ranging from 20,2 to 109,5 °C. Separation of these components in the rectification process is possible only under specific conditions, i. e. if the distillation of the first part is azeotropic and takes place at temperatures below the boiling point of ethanol and if the second part contains components boiling at higher temperatures and forming two- three- and four-component azeotropic mixtures boiling at temperature lower than that of the ethanol + water azeotrope. In the course of...
Effects of polluting foreign matters present in synthetic ethanol upon its assimilation by Candida utility yeast.Peer-reviewed article
J. PELECHOVÁ, J. ROSÁK, J. UHER, V. KRUMPHANZL
Kvasny Prum. 1980; 26(1): 10-16 | DOI: 10.18832/kp1980003
Crude synthetic ethanol contains some foreign matters which are harmful in applications, where ethanol is to be used as a source of carbon necessary for the growth of microorganisms. The authors have studied in the first line effects of contaminants which are frequently present in high concentrations. Though the results of fermentation tests fully confirm negative effects contaminants have upon the yields of yeast mass, it is extremely improbable that the concentration may be as high as to retard fermentation process or in an extreme case to stop it. This holds true both to batch and continuous cultivation in crude synthetic ethanol without returning...
Development and manufacture of fermenters in ZVÚ Works at Hradec Králové.Peer-reviewed article
J. JAROMĚŘSKÝ, M. KHOL
Kvasny Prum. 1980; 26(1): 17-20 | DOI: 10.18832/kp1980004
The article deals with the design, manufacture and further development of fermenters in ZVÚ Works Nat. Corp. at Hradec Králové. The Works have been making fermenters for more than 15 years and their designers and engineers have acquired a comprehensive experience covering not only the design and construction of fermenters, but also their operation, since they always assist in putting new units into service. New types of fermenters which are at present being developed in the Works and will serve for processing fodder proteins, are the result of a close cooperation with Research Institute of Chemical Engineering inBrno. The Institute is responsible for...