Kvasny Prumysl, 1983 (vol. 29), issue 12
Problems of pesticides. III. Pesticides in brewing.Peer-reviewed article
B. ©PINAR, V. KELLNER, J. ČULÍK
Kvasny Prum. 1983; 29(12): 265-267 | DOI: 10.18832/kp1983049 
A contamination of brewing process with pesticides is discussed. A review of pesticide agents applied to brewing raw-materials are described. Beer, as the final product, contains very low concentrations of pesticides (in ppb). Concentrations of these residues in the initial raw materials are much higher.(In Czech, English summary only)
Cleaning and sterilization in breweries from the standpoint of CIP method. Part III. Sterilization - sterilizing agents.Peer-reviewed article
P. «OPKA
Kvasny Prum. 1983; 29(12): 268-272 | DOI: 10.18832/kp1983050
The article is focused in the theory of sterilization. The effect of principle factors, such as are temperature, pH and concentration of agent used, on the final effect are described. Further, a list of principle sterilizing agents with their actions, spectra of efficiency, principal properties and possible applications of their own and also in combination with the other cleaning and sterilizing procedure are discussed.(In Czech, English summary only)
Diacetyl in Slovak beers.Peer-reviewed article
M. ONDRÍ©EKOVÁ
Kvasny Prum. 1983; 29(12): 273-275 | DOI: 10.18832/kp1983051
A theory of the origin of diketons in beer during the principal fermentation is described in the article. Also their harmful effect on the taste of beer is mentioned. Further, methods for the determination of diacetyl and the results obtained from the analyses of Slovak beers are described. The head-space technique used for the determination of diacetyl has the following advantages: a simple preparation of the sample, a rapidity of the analysis proper and an elimination of the possibility to determine also precursors.(In Slovak, English summary only)
Lignocellulosic materials - potential raw-material for fermentation industry.Peer-reviewed article
B. ©PAČEK, J. UHER, N. SLAVÍKOVÁ
Kvasny Prum. 1983; 29(12): 276-278 | DOI: 10.18832/kp1983052
The article is concerned with problems of the contemporary distillery with respect to the utilization of lignocellulosic materials as a raw-material for alcohol industry. The pretreatment of raw-material, hydrolysis proper (especially the enzyme hydrolysis) and further problems are discussed.(In Czech, English summary only)
Biosynthesis of L-lysine from paper hydrolysate with Corynebacterium glutamicum and Brevibacterium sp..Peer-reviewed article
J. PELECHOVÁ, R. SEIFERT, F. SMÉKAL
Kvasny Prum. 1983; 29(12): 279-282 | DOI: 10.18832/kp1983053
Production strains Corynebacterium glutamicum and Brevibacterium sp. are able to growth and synthetize L-lysine in the fermentation medium with the paper hydrolyzate as the source of monosaccharides. The paper hydrolyzate can be prepared by the enzyme or chemical hydrolysis. With respect to the present technologies, paper hydrolyzates have a relatively low content of monosaccharides. Therefore, the production of L-lysine was only 10-12 g . l-1 of the fermentation broth. The production of 20-24 g of L-lysine per litre of the medium was achieved in the media proper paper hydrolyzate was supplement with saccharose that permitted...