Kvasny Prumysl, 1978 (vol. 24), issue 3
Study of the application of barley as brewing adjunct for production of 10 % light beer.Peer-reviewed article
V. Ch. BAČVAROV, J. MO©TEK
Kvasny Prum. 1978; 24(3): 49-54 | DOI: 10.18832/kp1978008 
The complex appraisal of results of physico-chemical and sensorical analysis of the worts and beers from 1/4 pilot plant 10 % light brews has revealed that the single decoction process (lasting 194 min) can replace a two-mash process (lasting 265 min). Czech normally modified and over-modified malts were suitable for 30 % barley treatment without application of microbial enzymes. No exprecive changes in physico-chemical and sensorical proprietes of beers have been observed.(In Czech, English summary only)
To the determination of higher alcohols in beer.Peer-reviewed article
J. VOBORSKÝ, M. KAHLER
Kvasny Prum. 1978; 24(3): 54-58 | DOI: 10.18832/kp1978009
Two colorimetric determination methods are compared with a chromatographic one. Colorimetric methods fail to provide a full information about the contents of higher alcohols present in beer, since colour reaction reveal only the following compounds: 2-methylpropanol-1, 3-methylbutanol-1, 2-methylbutanol-1 and partly also butanol. Other alcohols, important for the sensoric point of view do not react with PDMABA. The De Clerck method is better than the Pfenninger one, since its results differ only slightly from the total amount of the mentioned alcohols determined by means of gas chromatography. The Pfenninger method gives for higher alcohols figures...
Ways in which food industry can use yeast cultivated in synthetic ethanol medium. Part II. Reducing concentration of nucleic acids in yeast.Peer-reviewed article
M. RUT, F. ©TROS, P. HLADEČEK
Kvasny Prum. 1978; 24(3): 58-67 | DOI: 10.18832/kp1978010
A chemical process without desintegration of yeast cell walls for removal of nucleic acids, is recommended, as one permitting application on an industrial scale. Conditions of acid-thermal treatment of yeast (i.e. acidity, duration and temperature of operation) and ammonia extraction (i.e. concentration of ammonia and duration of process) were thoroughly studied. For practically full removal of nucleic acids the following process was proposed: yeast suspension (10 - 13 gof yeast dry matter/100 ml) is treated by acid (0.3 MH3PO4, 30 minutes, 80 - 90 °C) and then by ammonia (4 % NH3, 1 hour, room temperature). Residual...
The microbial production of the L-lysine based on ethanol and acetic acid.Peer-reviewed article
P. PILÁT
Kvasny Prum. 1978; 24(3): 67-70 | DOI: 10.18832/kp1978011
Similarly as in the case of the production of microbial proteins (SCP), the efforts to employ the petrochemical raw materials penetrate even to fermentation production of amino acids. The synthetic ethanol and acetic acid, belong besides hydrocarbons, to the most promising substrates. The results comparable to sacharidic sources have been reached already as for the L-Lysine biosynthesis by means of new production microorganisms and technological processes.(In Czech, English summary only)