Kvasny Prumysl, 1958 (vol. 4), issue 1
Significance of tanning matter in hops and new colorimetrical method of its determination.Peer-reviewed article
M. KOTRLÁ-HAPALOVÁ, J. SOUDEK
Kvasny Prum. 1958; 4(1): 3-6 | DOI: 10.18832/kp1958001 
During the continuous study of all valuable components of hops, the analytical methods for identifying of hop tannins were reviewed. It was detected that the De Clerck colorimetric method was the most suitable in terms of working techniques and achievable accuracy and requirements for the determination of all tanning components of hop. To make the serial determination more accurate and rapid without visual fatigue of an analyst, objective modification of this method, based on the principles of absolute colorimetry was worked out. (In Czech, English summary only).
A study of bouquet substances in Slovak wines.Peer-reviewed article
A. NAVARA
Kvasny Prum. 1958; 4(1): 14-17 | DOI: 10.18832/kp1958002
1. This study presents an experiment for the retention of bouquet substances during fermentation of grape cider with the aim to use these substances as flavoring additives for improving wines with lower aroma. 2. We tried to assess the quantity of esters in the individual sorts of Slovak wines and studied a relationship between volatile components of the individual sorts and their effect on the wine character during storage. 3. Based on splitting of wine esters, changes during technological processing of wine were studied chromatographically. It is suggested that chromatographic splitting may be used for a better evaluation of the individual wine...