Kvasny Prumysl, 1986 (vol. 32), issue 7-8
Production of non-alcoholic beer with increased level of vitamin B1.Peer-reviewed article
V. ČERNOHORSKÝ, J. CUŘÍN, J. VERNEROVÁ
Kvasny Prum. 1986; 32(7-8): 145-147 | DOI: 10.18832/kp1986036 
The ability of the special strain of brewing yeast of Saccharmomyces uvarum E 29/7 to ferment substrate under the preservation of the increased level of vitamin B1 was utilized. Experiments were performed in a production of non-alcoholic Pito beer on pilot-plant scale and industrial scale. The beverage resulting from the production on pilot-plant scale contains 260 mg of vitamin B1 per 1 litre in comparison to the standard sample having only 40 mg per litre. From experiments performed on an industrial scale the levels of vitamin B1 in samples were 180 mg.l-1 and in the standard sample of 30 mg.l-1,...
Reliability of some mechanical, physiological and microbiological determinations.Peer-reviewed article
P. ČEJKA
Kvasny Prum. 1986; 32(7-8): 147-152 | DOI: 10.18832/kp1986037
The problem of a low reliability of some mechanical, physiological and microbiological determinations are discussed in the article. The table of the reliability intervals for the determined character with the 95% probability of the certainty is described. The usage of this table is demonstrated on practical examples.(In Czech, English summary only)
Factors affecting the values colour of congress wort and colour after boiling.Peer-reviewed article
H. VRTĚLOVÁ, M. MACHALOVÁ
Kvasny Prum. 1986; 32(7-8): 152-155 | DOI: 10.18832/kp1986038
The colour formation is dependent on many conditions. The most significant effect has a harvest and a growing area of barley. The significant effect also has the barley variety and the technology used for its processing. The final result need not always be successful; e. g. the crop of 1982 was exceptional and unfavourable with respect to the colour formation.(In Czech, English summary only)
Measurement of beer foaming.Peer-reviewed article
J. ŠAVEL, M. PROKOPOVÁ
Kvasny Prum. 1986; 32(7-8): 156-158 | DOI: 10.18832/kp1986039
The foaming power of four beer kinds using the outflow from a special funnel or the ultrasound was tested. Both the methods allow to froth the same beer quantity (105 ml) in a cylindrical vessel with the diameter of55 mmand the height of130 mm. The foaming power of beers was evaluated according to the time of a partial decomposition of the foam. The time includes the beginning phase of a foam decomposition as well as a flow of beer down that is in a good agreement with the judgment of a consumer before his drinking. The foaming power of beers was measured by a photoelectric device that enables the measurement of he time of the partial foam decomposition...
Brewing in Barma.Peer-reviewed article
J. ŠROGL, A. NEZBEDA
Kvasny Prum. 1986; 32(7-8): 158-161 | DOI: 10.18832/kp1986040
The equipment for the brewery Mandalayin Barma was supplied by foreign trade union of Technoexport. This equipment resulted in the twice increased beer production in Barma (i. e. about 7000 m3annually). The apparatures were constructed in Works of Victorious February in Hradec Králové. The following apparatures were supplied; the equipments for fermenting cellar, stock cellar, washing and keg racking, pure yeast culture plant, plate filtration, refrigeration, carbon dioxide collection and laboratory equipment.(In Czech, English summary only)
Mohnopumps in brewing.Peer-reviewed article
H. BAUERFEIND
Kvasny Prum. 1986; 32(7-8): 161-164 | DOI: 10.18832/kp1986041
The Mohnopumps were significantly wide-spread in the industry of Federal Republic of Germany during last 30 years. The author discussed the peculiarities of a construction and a function of these pumps that permit their versatile utilization for a variety of substrates, operation conditions and pumping possibilities. The experencies from a successful application of mohnopumps in breweries for a transport of wort, hopped wort, rough sediments, spent grains, wet grist, yeasts and beer are summarized in the second part of the article. These pumps are very suitable for an automatic dosage of yeasts into the stream of hopped wort, mixing, transport and...
Experiences from American brewing (part II).Peer-reviewed article
P. FERKL
Kvasny Prum. 1986; 32(7-8): 165-167 | DOI: 10.18832/kp1986042
This part of the article describing special characteristics of beer production in theUnited States of Americais focused on the fermentation of concentrated worts, on the fermentation and maturing in one vessels, on the afterfermentation processes and on high gravity brewing. A special attention is devoted to the characteristics of the production of "light beer".(In Czech, English summary only)
Breweries and malt-houses in Japan.Peer-reviewed article
J. MLEJNEK
Kvasny Prum. 1986; 32(7-8): 167-169 | DOI: 10.18832/kp1986043
According to the annual beer production quantity Japanis on the 5th place in the world. The brewing companies Kirin,Sapporo, Asahi and Suntory endeavour to keep the high quality and the uniform flavour of their beers of the same brand regardless to the producing brewery. The most famous beer is the nonpasteurized pale beer of pilsner type in the form of the so called "draft".Japan malt-houses and especially breweries use the most modern technology, the majority of brewing houses is controlled by computers and the new breweries are equipped with cylindrical conical-bottom tanks. The great attention is devoted to the automation of the raking...
Possibilities to stimulate alcoholic fermentation of grape must by yeast cell wall preparation.Peer-reviewed article
E. MINÁRIK, Z. KUNOVÁ, O. JUNGOVÁ, Z. ŠILHÁROVÁ
Kvasny Prum. 1986; 32(7-8): 169-173 | DOI: 10.18832/kp1986044
Yeast cell wall preparations show stimulating activity on the course of alcoholic fermentation of grape must. A more rapid fermentation start and a more profound sugar fermentation may be achieved. This is evident first of all under unfavorable fermentation conditions (high sugar concentration of the must, presence of fermentation inhibitors). Though the stimulating effect of yeast wall preparation compared with the activator B. cinerea is more gentle, it represents a new effective means applicable in winery practice.(In Slovak, English summary only)
Problems with wine sulphuring.Peer-reviewed article
K. PRŮŠA, M. ZAJÍČEK, P. VAJČNER
Kvasny Prum. 1986; 32(7-8): 174-175 | DOI: 10.18832/kp1986045
The additions of polycar AT, thiamine and hydrogel of bentonite into the fermenting grape must and their effect on the quantity of free and total sulphur dioxide were tested. Polyclar AT permits to decrease the whole dosage of sulphuring without any oxidative changes of vine. The effect of hydrogel of bentonite on the SO2 level was not determined. The additions of thiamine increased the level of free SO2 that resulted in a lower dosage of sulphuring. The fermentation with the pure culture AS had no effect on the SO2 level.(In Czech, English summary only)
Utilization of distillery wastes in a production of fodder yeasts from ethanol.Peer-reviewed article
L. ADAMÉK, M. RUT, F. ŠTROS, J. UHER
Kvasny Prum. 1986; 32(7-8): 176-178 | DOI: 10.18832/kp1986046
The results of batch cultivations showed that distillery wastes (the first and last reactions) can be used as a carbon source for the synthesis of yeast biomass from ethanol. No inhibitory effect of compounds contaminating ethanol on a growth of yeast populations was observed during experiments. Also the biomass quality was not changed. The biomass yield and the biomass composition were the same using the waste fractions of ethanol and synthetic ethanol, resp. Therefore, the waste fractions of ethanol distillation can be used as a substitute for synthetic ethanol.(In Czech, English summary only)
The rationalization of the fermentation process for the production of penicillin.Peer-reviewed article
V. MATELOVÁ
Kvasny Prum. 1986; 32(7-8): 178-180 | DOI: 10.18832/kp1986047
The fermentation method has been developed the principle of which consists in multiple partial replacements of the fermentation broth in course of the fermentation process. This method joint with the optimalization of the time fixed for the broth exchange and the optimum concentration of the nutrients in the medium added and of its volume being replaced, resulted in successful increase of the penicillin output both in absolute values and in time dependence, as well as in the total yields of the antibiotic.(In Czech, English summary only)
L-lysine biosynthesis with chlor-resistant mutants of Corynebacterium sp..Peer-reviewed article
F. SMÉKAL, J. PLACHÝ, S. ULBERT, M. BÁRTA
Kvasny Prum. 1986; 32(7-8): 180-181 | DOI: 10.18832/kp1986048
The mutant strains of Corynebacterium sp. with the resistance to S-amino-ethyl-L-cysteine and chlorlysine accumulate L-lysine in the quantity of 40 to 50 g . l-1 during 96 h of the cultivation with the conversion between 42 and 48 % when the cultivation medium has the optimum C:N ratio.(In Czech, English summary only)
Preparation of L-threonine by mutants of Corynebacterium.Peer-reviewed article
J. PLACHÝ
Kvasny Prum. 1986; 32(7-8): 182-183 | DOI: 10.18832/kp1986049
From a-amino-b-hydroxyvaleric acid resistant mutants of Corynebacterium producing threonine there was selected the mutants Corynebacterium sp. 9366-AHV/21, capable of accumulating 7,5 g.l-1 L-threonine in a sacharose - corn-steep medium after 4 days of cultivation in flasks.(In Czech, English summary only)
Effect of PO2 on growth and physiological characteristics of Candida utilis in multistage tower fermentor.Peer-reviewed article
J. PÁCA
Kvasny Prum. 1986; 32(7-8): 183-189 | DOI: 10.18832/kp1986050
The effect of increasing the partial pressure of oxygen in aeration gas on growth and physiological activity of the yeast Candida utilis in a multistage tower fermentor was studied. The measurements were made at steady states of continuous culture for single values of dilution rate, temperature and pH in all stages of the fermentor and with one given ethanol concentration in the growth medium feed. The partial pressure of oxygen in the gas phase was changed in the range from 21 to 39 kPa. The results revealed the existence of the upper critical value of the partial pressure of oxygen in the gas phase. It was demonstrated what the upper critical...
Changes of lipids during the yeast biomass fractionation.Peer-reviewed article
V. ŠILINGER, F. MACEK, S. ČIŽINSKÁ
Kvasny Prum. 1986; 32(7-8): 190-191 | DOI: 10.18832/kp1986051
A ratio between phosphatidylcholin and lysophosphatidylcholin in the yeast Saccharomyces is compared, both after the disintegration and after the disintegration followed by the reduction of the nucleic acids content. In the consideration of this there is proposed a way of the lowering of the phospholipidic lysoderivates content in the extract of lipids, which may be applied in the course of a technological process of the complex utilization of the yeast cell.(In Czech, English summary only)
Regulation of synthesis of exocellular proteases with bacilli.Peer-reviewed article
J. CHALOUPKA, J. PAZLAROVÁ, M. DVOŘÁKOVÁ, H. KUČEROVÁ, M. STRNADOVÁ, L. VÁCHOVÁ, J. VOTRUBA
Kvasny Prum. 1986; 32(7-8): 191-194 | DOI: 10.18832/kp1986052
Regulation of the formation of exocellular proteases in Bacillus subtilis and B. megaterium was compared. Whereas in the first case depends on sporulation only, in the second one proceeds during growth as well as during sporulation. Mechanism of the control of proteinase synthesis in both physiological stages is different. The enzyme synthesis during sporulation depends on the developmental process. The formation of the protease is suppressed by temperature in both cases.(In Czech, English summary only)
Level and composition of sterols of various strains of Saccharomyces cerevisiae.Peer-reviewed article
B. BĚHALOVÁ, Č NOVOTNÝ, J. ZAJÍČEK, J. PÁSKOVÁ, J. LATINÁK, M. KOŽENÝ
Kvasny Prum. 1986; 32(7-8): 194-196 | DOI: 10.18832/kp1986053
In the strain-complex of Saccharomyces cerevisiae the ability of increased ergosterol production was tested. The contents of ergosterol, D 5,7sterols and total sterols changed itself in relation to used strain and cultivation conditions. The best producents are A22 and KBD, attaining cca 2 % ergosterol in dry matter on molasses medium with corn steep. The relation of ergosterol and 24/28/dehydroergosterol on the synthetic Olson-Johnson medium had in the comparison the fermentation on molasses medium with corn steep a twice value.(In Czech, English summary only)
Strain E. coli ML 30 with increased production of amylomaltase.Peer-reviewed article
E. STEJSKALOVÁ, E. PAVLASOVÁ, B. SIKYTA
Kvasny Prum. 1986; 32(7-8): 196-198 | DOI: 10.18832/kp1986054
Strain with increased production of amylomaltase was prepared from a low productive strain in the chemostat under specific selection conditions (by changing the limitation of culture growth by maltose).(In Czech, English summary only)
Isolation of lasalocid and the improvement of a strain of Streptomyces lasaliensis.Peer-reviewed article
N. STEINEROVÁ, H. LIPAVSKÁ, J. CUDLÍN, Z. VANĚK
Kvasny Prum. 1986; 32(7-8): 198-199 | DOI: 10.18832/kp1986055
Streptomyces lasaliensis produces besides other substance the olihoether coccidiostatic lasalocid. Mutants producing only lasalocid and mutants producing only quinomycin A were obtained both by natural selection and selection after mutagenic treatment. Isolation, purification and analytical determination of both compounds were worked out.(In Czech, English summary only)