Kvasny Prumysl, 1985 (vol. 31), issue 6
Polish experiences from production of malt extract using ethanol.Peer-reviewed article
L. DUBIELOWA, T. GOLEBIEWSKI
Kvasny Prum. 1985; 31(6): 121-123 | DOI: 10.18832/kp1985020 
The method for a production of extract of malt extract using ethanol was developed in Research Institute of Fermentation Industry. This malt extract was used in a range of 30 to 50 % instead of malt during eight years in industry. The Council of Brewery Industry Association gave an agreement with a build up of the new plant for malt extract production. The described method of the extraction of malt can initiated the production of isomerized extracts. The extract produced by the help of ethanol both in nonisomerized and isomerized forms should be beyond and hygienic objection. The production of malt extract using ethanol was accepted in other European...
The KEGs - means to improved halting and higher quality of draft beer.Peer-reviewed article
P. NOVÝ, A. KRATOCHVÍLE
Kvasny Prum. 1985; 31(6): 124-129 | DOI: 10.18832/kp1985021
The KEG is a progressive cylindrical transport container for beer. These KEGs are produced from aluminium alloys or stanless steel. Some types of kegs are partially or completedy sheathed with scorched rubber or polyurethane. The article described basic construction types of kegs including their fittings and draft head. An automatic line for a complete handing with the KEGs including their main parts as well as a peripheral equipment and an example of keg's washing is discussed, further a procedure of the keg handling together with its preparation for the filling is described. At the end the main advantages of the usage of KEGs are summarized.(In...
Stability and determination of sweetener USAL in beer and wine.Peer-reviewed article
M. PRUDEL, E. DAVÍDKOVÁ, V. PEŘINA, K. PRŮ©A, J. DAVÍDEK
Kvasny Prum. 1985; 31(6): 129-132 | DOI: 10.18832/kp1985022
The method for the determination od Usal (Aspartame hydrochloride; L-aspartyl-L-phenylalanine methylester hydrochloride) was modified for the analysis of low sweetener concentrations in beer and wine. The original procedure for Usal determination in foods based on Usal separation on a strong cation exchanged in citrate buffer by means of a simplified aminoacid analyzer was applied without any preliminary sample concentration. The modification comprise lager injections applied (3 ml instead the former 0.2 ml), a longer column (250 ´ 7 mm), higher pH of elution buffer (pH 4.55) and higher working temperature of column (74 °C). The sensitivity limit of...
Investigation of the growth curves in L-Lysin fermentation by the strain of Brevibacterium flavum.Peer-reviewed article
M. HU©«ÁK, M. MÔCIK, M. BUČKO, A. HANO, P. KREMPA
Kvasny Prum. 1985; 31(6): 132-135 | DOI: 10.18832/kp1985023
The method for the measurement of the biomass growth in the fermentation of L-Lysin, principle of which is based on the measurement of bacterial suspension turbidity, was worked out. The method is quick and comparable with the classical methods for the measurement of microorganisms growth. The experimental values were corrected by a method of the logistic curve on computer. The growth curves obtained by the 1 % and 10 % v/v of inoculum as well as those ones with various kinds of the inoculating medium were compared.(In Slovak, English summary only)
Biochemical properties and genetic specification if enzyme systems for maltose utilization in yeasts.Peer-reviewed article
J. ©UBÍK, M. OBERNAUEROVÁ
Kvasny Prum. 1985; 31(6): 135-138 | DOI: 10.18832/kp1985024
A brief review of biochemical properties and genetic specification of enzyme systems that are responsible for a transport and hydrolyzes of maltose in yeasts is made. A control of the maltose-permease system by induction, catabolite repression and catabolite inactivation as well as control of a-glukosidase by induction and glucose repression is described. A discussion of the genetic MAL system and the isolation and cloning of the structural gene for maltase is made. A genetic and physical analysis of defined MAL strains and a possible evolutional origin of the individual MAL genes is described.(In Slovak, English summary only)