Kvasny Prumysl, 1983 (vol. 29), issue 4
Determination of achievable attenuation of malt, hopped wort and beer by quick method.Peer-reviewed article
M. ČERNÝ
Kvasny Prum. 1983; 29(4): 73-75 | DOI: 10.18832/kp1983013 
An estimation of achievable attenuation according to the method of fermentation lasting 72 h was compared with a quick method according to EBC Analytic modified in the Development Center of Brewing in Prague- Braník. The results show that the quick method is fully comparable with that method lasting for 72 h. This method is suitable due to a low pretention and quick estimation for the use in industrial scale. The results obtained by both the methods have the error of ± 1 %. An advantage of the method is in a more quick estimation, a lower distortion of the results by autolysis and a lower sensitivity to fluctuations of the room temperature....
Contribution to problems with a storage of cereals with respect to brewing barley.Peer-reviewed article
F. DUDÁ©
Kvasny Prum. 1983; 29(4): 75-79 | DOI: 10.18832/kp1983014
Factors characterizing the manner of a storage, i. e. a respiration, moisture, temperature, air supply and physiological state are discussed. In the second part, the technique of a storage proper comprising a dry storage, a storage in freezing state and a storage under active aeration are compared, especially from the economical standpoint.(In Czech, English summary only)
Industrially significant genetic manipulations.Peer-reviewed article
V. JIRKŮ, G. BASAŘOVÁ
Kvasny Prum. 1983; 29(4): 80-83 | DOI: 10.18832/kp1983015
This survey article deals with these aspects of mutational and recombinational genetic that are of importance of creating and improving microbial strains utilized in the production of commercial metabolites and enzymes. Screening methods as well as the questions concerning strain stability and storage are not covered here.(In Czech, English summary only)
Air filtration for fermentation processes.Peer-reviewed article
P. ETTLER, L. RYCHLÍK, J. LANGER
Kvasny Prum. 1983; 29(4): 83-87 | DOI: 10.18832/kp1983016
The sterility of compressed air has a principal effect in the course of biosynthetic processes where enzymes, amino acids, antibiotics and hormones are produced. Following filter materials were tested: Aerotube CERG 03105, a sheet of glass microfibers FV and the material PC-S. The penetration of oil aerosol, polydispersed aerosol of crystalline NaCl and atmospheric air though the mentioned materials was studied. On a base of the results obtained of procedure for the air filtration suitable for fermentation processes was elaborated. When the inland material FV was used the classification of class V with the first degree of purity was achieved. This...
Development of fermenter with axial mixing and comparison of morphology of Aspergillus niger during cultivation in fermenters with axial and rotation impellers.Peer-reviewed article
L. CHLÁDEK, J. BUŘIČ, J. ©USTR, © BÁLINT, M. POVA®AJ, J. KOČAN
Kvasny Prum. 1983; 29(4): 87-92 | DOI: 10.18832/kp1983017
A development of the fermenter with a pulsed axial mixing of described. To evaluate the effect of shear stress on growth characteristics of filamentous microorganisms in batch culture parallel cultivations were carried out. First cultivation was carried out in a fermenter equipped with a rotation impeller, while in the second one culture the new axial pulsed mixing was used. Both the fermenters had the same parameters (geometry of the vessel, medium, inoculum, temperature etc.). The results showed that a structure of the mycelium obtained on these two fermenters was different. In a fermenter with the rotation impeller, compact pellets with a high density...