Kvasny Prumysl, 1994 (vol. 40), issue 11
Measuring of the activity of brewing yeast..Peer-reviewed article
J. ŠAVEL, M. PROKOPOVÁ
Kvasny Prum. 1994; 40(11): 325-329 | DOI: 10.18832/kp1994021 
Options for rapid assessment of the brewing yeast activity under operational conditions are discussed. The activity of brewing yeast was evaluated in compliance with carbon dioxide quantity, released from a mixture of 20 to 80% yeast's sediment in 12% hopped wort. Carbon dioxide drop was measured by loss in weight by using of electronic flowmeter and pressure gauge. By means of photometric deflocculation test were measured changes of the yeast suspension in clear hopped wort, after their centrifugation and following dispersion by escaping carbon dioxide.(In Czech, English summary only)
The occurence of specified heavy metals in hops.Peer-reviewed article
K. KROFTA, F. FRANTÍK, V. KELLNER
Kvasny Prum. 1994; 40(11): 329-333 | DOI: 10.18832/kp1994022
Problems in connection with the occurence of some significant metal elements in hops and hop products are discussed. The occurence of heavy metals from the viewpoint of their distribution into various parts of the plant is considered, taking in account a cultivation area. Comparison is made with respect to metals' contents in soil and country of origin. Fundamental knowledge relating to metals' concentration changes during production of hop extracts and pellets are summarized. A brief survey of the problems involved as seen from the aspects of their significance for the brewing industry.(In Czech, English summary only)