Kvasny Prumysl, 1975 (vol. 21), issue 9
Evaluating the quality of malt by applying the method used for the determination of proline in wort.Peer-reviewed article
M. NENTWICHOVÁ, M. TRKAN
Kvasny Prum. 1975; 21(9): 193-195 | DOI: 10.18832/kp1975024 
The authors have analyses 24 samples of malt prepared in a malting micro-plant to study the relation between the percentage of proline nitrogen in malt and its enzymic activity. By applying mathematic and statistic methods to the results of their analyses the authors derive a conclusion, that the amount of the proline nitrogen characterizes the activity of cytolytic and proteolytic enzymes and that the proline nitrogen to total nitrogen ration reflects the activity of amylolytic enzymes. Proline nitrogen permits therefore to evaluate the enzymic activity and, consequently, the quality of malt. The published results must be taken as preliminary ones...
An open yeast propagator installed in the Strakonice Brewery.Peer-reviewed article
J. ŠAVEL
Kvasny Prum. 1975; 21(9): 196-198 | DOI: 10.18832/kp1975025
The article deals with the experience on a new yeast propagator unit of an open type which has been installed in the fermenting room of the Strakonice brewery. The propagator consists of a small tank of 2 hl capacity, from which the fermenting wort is pumped into a big tank fabricated of stainless steel and containing 5 hl of wort. In the appropriate stage of fermentation more cold, standard wort is added to bring its amount in tank to 30 hl. The results so far achieved are very good. The described system supplies with yeast the brewery producing 160 000 hl of beer per annum. Fresh yeast starter was required only four times. Both microbiologic...
Assessing the efficiency of various defoamers.Peer-reviewed article
L. ADÁMEK, F. ŠTROS
Kvasny Prum. 1975; 21(9): 205-208 | DOI: 10.18832/kp1975026
To assess the efficiency of various defoamers used in aerobic cultivation of microorganisms a fermentation test can be recommended for its simplicity. It consists essentially of cultivation under standard conditions of microorganisms lasting 6 hours and of automatic metering of defoamer. The defoaming activity is expressed as an efficiency coefficient, i.e. as a ratio of specific consumption of pure oleic to the consumption of the given defoamer. It indicates, how many times the defoamer in question is more efficient than oleic acid. The relative character of the ration ensures good reproducibility of tests. The authors present efficiency coeffficients...