Kvasny Prumysl, 1983 (vol. 29), issue 1
Treatment of yeast suspension by acetic acid for a suppression of bacterial contamination in baker's yeast.Peer-reviewed article
J. FABIÁN, J. PÁSKOVÁ
Kvasny Prum. 1983; 29(1): 4-7 | DOI: 10.18832/kp1983001 
The effect of acetic acid on coliform bacteria contamination baker's yeast was studied. The addition of about 0.4 % of acetic acid into a contaminated yeast suspension resulted in the optimum pH of 3.9-4.1. The acetic acid addition did not substantially affect leavening power and keeping quality of baker's yeast not even after the exposure lasting several days. Using this procedure the number of contaminated bacteria was significantly decreased in a short time interval. The bacteria growing in colonies and producing hydrogen sulphide (H2S bacteria) on agar with natrium desoxycholate which can indicate a presence of some facultative pathogens...
Application of isotachophoresis for distinction of acids in wine.Peer-reviewed article
K. PRŮŠA, O. SMEJKAL
Kvasny Prum. 1983; 29(1): 7-9 | DOI: 10.18832/kp1983002
The article contains results of the determination of organic acids by isotachometric analysis in the modification by Polanský and Farkaš in samples of South-Moravia wines from a region Bzenec, Velké Pavlovice, Mikulov, and Znojmo. The wines from peripheral regions have lower content of tartaric acid. The wines from a bad year 1980 also had a lower content of tartaric acid but on the other had they had a high content of malic and lactic acids. The authors consider isotachophoretic analysis very suitable for a quick identification and determination of organic acid contents in wine. An application of this method would make possible the desired interferences...
Testing of some possibilities of direct microbiological utilization of phytomass.Peer-reviewed article
D. LONGAUEROVÁ, D. HAĽAMA
Kvasny Prum. 1983; 29(1): 10-12 | DOI: 10.18832/kp1983003
Enrichment cultures of anaerobic cellulolytic bacteria were cultivated on corn cobs and wooden chips. Mesophilic cultures (37 °C) were kept in suspension of these materials in phosphate buffer (pH 6,8), thermophilic (60 °C) ones in suspension with material medium. The production of volatile fatty acids was optimalized by Rosenbrock's method. The water phase after anaerobic fermentation is a suitable cultivation medium for SCP production by Candida tropicalis.(In Slovak, English summary only)