Kvasny Prumysl, 2012 (vol. 58), issue 2
Non-volatile N-nitrosamines in brewing industry. Part II. - Study of the Effect of UV Irradiation on the ATNC and Some Representatives of N-nitrosoaminoacids in Beer.Peer-reviewed article
Jiří ČULÍK, Tomáš HORÁK, Pavel ČEJKA, Marie JURKOVÁ
Kvasny Prum. 2012; 58(2): 26-29 | DOI: 10.18832/kp2012004 
Contrary to volatile N-nitrosamines, about mechanism of decomposion of apparent total N-nitroso compounds and non-volatile nitrosamines e.g. N-nitrosoaminoacids in beer is known only a little. In the first part of this article are therefore given the basic information about their incidence, mechanism of arrising and method of estimation in beer and other foodstuff. The second part of this article is dedicated to the study of the efect of UV irradiation on the ATNC and their some components N-nitrosoaminoacids nitrososarkosine (NSAR), nitrosoproline (NPRO and the main representative of volatile N-nitrosamines N-nitrosodimethylamine (NDMA) in beer. The...
New trends in liquid chromatography and their utilization in analysis of beer and brewery raw materials. Part 1. Theoretical introduction.Peer-reviewed article
Jana OLŠOVSKÁ, Marie JURKOVÁ
Kvasny Prum. 2012; 58(2): 30-35 | DOI: 10.18832/kp2012005
In connection with increasing requirements on high throughput analyses in the laboratories the instrumental techniques undergo continuous improvement. This article is focused on the progress in the most widespread separation technique, the liquid chromatography. Its novel modification, Ultra High Performance Liquid Chromatography (UHPLC), uses the principle of separation on porous "sub-2 μm"particles. The advantages of UHPLC over the traditional HPLC are a nine-fold reduction of analysis time, double improvement of resolution, and triple improvement of sensitivity. It results not only in time saving but also in the cost of energy and organic solvents...
Hop Breeding in the Czech Republic.Peer-reviewed article
Vladimír NESVADBA, Zděnka POLONČÍKOVÁ, Alena HENYCHOVÁ
Kvasny Prum. 2012; 58(2): 36-39 | DOI: 10.18832/kp2012006
Hop breeding objectives in CR can be divided into aroma and bitter hops, both being resistant to stresses, dwarf varieties for cultivation in low trellis and varieties for pharmaceutical utilization. In 2008 we managed to release Vital and Kazbek. Varieties Saaz Late and Bohemie were registered in 2010. Recently we have bred some perspective genotypes with high contents of xanthohumol or desmethylxanthohumol (DMX). In January 2011, we were awarded funding for a new four years EUREKA Project, which is an inter-governmental network that supports the development for innovations across all sectors of industry within EU. It should help us to develop new...