Kvasny Prumysl, 1978 (vol. 24), issue 1
Hop resins. Part II. Analytic methods applicable to isomerized hop extracts.Peer-reviewed article
J. KUBÍČEK, M. VANČURA
Kvasny Prum. 1978; 24(1): 3-6 | DOI: 10.18832/kp1978001 
New methods have recently been elaborated how - by using alkaline or catalytic process - to prepare on an industrial scale isomerized hop extracts from hop resins. Such extracts are used for the so-called cold hopping carried out in the finishing stages of the brewing process, i. e. during filtering or racking operations. One of the outstanding problems is now therefore reliable analytic determination of the properties of new extracts. The authors have compared four analytic methods using as samples a number of alkaline isomerates (after partial isomerization) and a Belgian preparation called Isopal. Advantages and disadvantages of the methods in question...
Some problems of industrial production of microbial proteins from petrochemical raw materials.Peer-reviewed article
F. ©TROS, M. ROSA
Kvasny Prum. 1978; 24(1): 6-9 | DOI: 10.18832/kp1978002
Development of industry producing microbial proteins by processing petrochemicals is far from being as rapid as was predicted and expected several years ago. InJapanthe production of yeast from isolated n-alkanes is prohibited because of objections of medical institutions. Similar situation is inItaly. Increasing prices of petrochemical raw materials and steadily rising capital investments into new works make in production less attractive and slow down its development in many countries. Quite different is the situation inUSSR, where there are at least three big works manufacturing yeast from isolated n-alkanes. Each of them has capacity exceeding 100 000...
Evaluating the quality of molasses processed by distilleries in 1974/75 and 1975/76 campaigns.Peer-reviewed article
J. LANGPAULOVÁ, A. JANDA
Kvasny Prum. 1978; 24(1): 9-15 | DOI: 10.18832/kp1978003
Samples of molasses covering two whole campaign periods in a number of big industrial distilleries inBohemiaandMoraviawere analyzed and evaluated applying several selected criteria. It has been found, that generally the percentage of volatile acids in analyzed samples exceeds average values. In roughly 50 % of samples are present nitrites in very small; practically trace concentrations, whereas the concentrations of nitrates are relatively high. Some samples of molasses processed by distilleries in 1974/75 contain high amounts of dextrorotatory compounds, especially of raffinose. Yields of alcohol fluctuated in 1974/75 campaign more markedly than in...
Active dry bakery yeast.Peer-reviewed article
E. PÍ©
Kvasny Prum. 1978; 24(1): 16-20 | DOI: 10.18832/kp1978004
The article deals generally with the properties of bakery yeast, its function in the dough rising process, requirements put to the quality of yeast and especially with technologic methods used to make active dry bakery yeast.(In Slovak, English summary only)