Kvasny Prumysl, 2006 (vol. 52), issue 5
Supercritical fluid extraction - new progressive method in brewing analytics. Part II. - The options of utilizing supercritical fluid extraction to analyze sensory active substances in beer.Peer-reviewed article
Jiří ČULÍK, Tomáš HORÁK, Pavel ČEJKA, Marie JURKOVÁ, Vladimír KELLNER, Pavel KARÁSEK, Eva VARAĎOVÁ-OSTRÁ
Kvasny Prum. 2006; 52(5): 142-147 | DOI: 10.18832/kp2006012 
Supercritical fluid extraction (SFE) of liquid samples can, despite certain problems, be considered a new prospective method, which, after further perfecting it, could establish itself in the field of analysis of trace amounts of sensory active substances in beer. In the article, the first results of extracting sensory substances from beer (alcohols, fatty acids and their esters) are presented. The method is gentle and environmentally friendly, it does not affect the analyzed material and uses a limited amount of organic solvents. Therefore, it corresponds with the modern trends in analytic chemistry and meets the demands of protecting the environment....
Physical characters of barley caryopses and grains of malt.Peer-reviewed article
Vratislav PSOTA, Karel VEJRAŽKA
Kvasny Prum. 2006; 52(5): 148-150 | DOI: 10.18832/kp2006013
The presented study is devoted to the significance of physical characters of barley caryopses and grains of malt for their utilization in the prediction of technological quality. In the study, older and new, subjective and objective methods of the assessment of physical characters of caryopses or malt are described. Needed instrumentation is also mentioned. In the first part of the study, physical methods used for the assessment of barley caryopses and grains of malt are summed up, attention is paid mainly to mechanical characters. The other part is focused on the study of the effect of the structure and chemical composition of a barley caryopsis or...
Non sustainable development. Consequences of the Changes of Global Carbon Cycle.Not peer-reviewed article
Lubomír NÁTR
Kvasny Prum. 2006; 52(5): 153-154 | DOI: 10.18832/kp2006014
The concepts of sustainability declare the necessity to preserve the Earth to next generations in an unchanged state. However, mankind irreversibly depleted a considerable part of usable fossil fuels. Due to their combustion as well as due to the changes of the continent surface the global carbon cycle receives more than 6 billion tons of carbon annually. About half of this carbon in the form of CO2 remains in the atmosphere increasing thus its CO2 concentration from about 280 ppm lasting for many thousands year to the present 380 ppm. This anthropogenic CO2 concentration increase induces changes in the radiation balance...