Kvasny Prumysl, 1987 (vol. 33), issue 5
Modern procedures of hop boiling. I. Theory of boiling process, changes of classical boiling vessel.Peer-reviewed article
P. «OPKA, S. PROCHÁZKA, B. KOCAR, J. TOM©ÍK
Kvasny Prum. 1987; 33(5): 130-134 | DOI: 10.18832/kp1987024 
In the first part of the article f modern procedures of hop boiling, the physico-chemical changes that occur during atmospheric and pressure hop boiling are discussed. Further, the possible saving of energy with the classical boiling vessel combined with the condenser for vapour is described.(In Czech, English summary only)
Factors affecting beer foaming.Peer-reviewed article
I. HLAVÁČEK, P. PRŮCHA, J. ©ROGL
Kvasny Prum. 1987; 33(5): 134-137 | DOI: 10.18832/kp1987025
The relative molecular weights of proteins were determined by gel chromatography. Three beer fractions obtained from the foam breaking during a determination of the foam breaking during a determination of the foam stability by Ross and Clark method were analyzed using the above mentioned method. Significant differences in the protein level were obtained from these fractions. The increased protein concentration with the relative molecular weights from 35 000 to 70 000, with the maximum about 50 000, were found in the mot stable fraction of the foam. Also isohumulone concentration in these fractions was 3 to 4 times higher in comparison...
Experiences with technology of wine-making for export.Peer-reviewed article
G. BUJDO©
Kvasny Prum. 1987; 33(5): 138-141 | DOI: 10.18832/kp1987026
A brief review of practical knowledges obtained in the Wine-Making-Plant in Nitra-Luľianky from the production of natural wines for export and during the stabilization of old and heavy wines is mentioned. The demands for the grapes are described in the introduction. Further, characteristics of physico-chemical methods of the stabilization - using heat, refrigeration and membrane filtration - are described. The high significance of the sulphurization regardless to the physical stabilization was proved. At the end, the effect of biopolymers on the formation of the sediments or the lower clearity of wine resulting from a longer storage are evaluated.(In...
Vinegar production from the standpoint of bioengineering calculations. II. Distribution problems.Peer-reviewed article
J. HRONČEK
Kvasny Prum. 1987; 33(5): 141-143 | DOI: 10.18832/kp1987027
Author recommends the use of the linear programming method for the instance of the vinegar distribution from the vinegarplant to the large-scale storage. The method including its effectiveness and economical yields is described.(In Slovak, English summary only)
Perspectives of ergosterol production from industrial yeasts.Peer-reviewed article
B. BĚHALOVÁ, Č NOVOTNÝ, F. MACHEK, J. PÁSKOVÁ, B. ©PAČEK
Kvasny Prum. 1987; 33(5): 143-146 | DOI: 10.18832/kp1987028
Synthesis of yeast ergosterol can be increased both by selection of suitable strains and by interference with fermentation technology. The later approach may cause an excessively high synthesis of ergosterol intermediates hampering its isolation. The ability to produce increased amounts of ergosterol was determined in Saccharomyces cerevisiae strains A22 and D7, the high production both biomass and ergostrol in strain D7 was tested also on an industrial scale. The best producers of ergostrol are selected strains of baker's yeast; the content of ergostrol in these strains exceeds several times that of hybrid baker's...
Bioreactors. IV. Pneumatically agitated reactors with irregular liquid flow pattern.Peer-reviewed article
J. PÁCA
Kvasny Prum. 1987; 33(5): 146-148 | DOI: 10.18832/kp1987029
A conical bottom reactor, reactors with air spagers in he form for a perforated tube system, bubble columns and multistage tower reactors are described in the article. The principle, the maximum vessel volume and possible application are discussed with each type of the reactor.(In Czech, English summary only)
Biotechnology information demands for research department, institute and branch.Peer-reviewed article
R. BURE©
Kvasny Prum. 1987; 33(5): 148-150 | DOI: 10.18832/kp1987030
The article briefly discusses three different type of scientific and technical information according to the content and the way of processing. First, information for R and D within research teams. Second, information for decision making on the level R and D institutes. And third, information needed for strategic planning and development of trends in the specific field (biotechnology).(In Czech, English summary only)