Kvasny Prumysl, 2006 (vol. 52), issue 4
Supercritical Fluid Extraction - New progressive method in brewing analytics. Part I. - Theoretical principles of supercritical fluid extraction and examples of its use.Peer-reviewed article
Jiří ČULÍK, Tomáš HORÁK, Pavel ČEJKA, Marie JURKOVÁ, Vladimír KELLNER, Pavel KARÁSEK, Eva VOSTRÁ
Kvasny Prum. 2006; 52(4): 106-110 | DOI: 10.18832/kp2006009 
Supercritical fluid extraction (SFE) of liquid samples can be considered a new prospective method, which has not yet been utilized in the field of beer analysis. In the article, basic principles of supercritical fluid extraction are explained and a brief literary outline of its applications in related branches is given. Another article will follow this introductory part and it will focus on the use of SFE to determine sensory active substances in beer.Supercritical fluid extraction (SFE) of liquid samples can be considered a new prospective method, which has not yet been utilized in the field of beer analysis. In the article, basic principles of supercritical...
Analytical Methods for Determination of Polyphenols in Sweet Wort, Wort and Beer.Peer-reviewed article
Markéta DVOŘÁKOVÁ, Pavel DOSTÁLEK, Petr HULÍN
Kvasny Prum. 2006; 52(4): 111-114 | DOI: 10.18832/kp2006010
This article describes the ways of analytical determination of polyphenols in brewing. The methods for this determination are divided into two groups, analytical methods for group determination and determination of individual polyphenols. The group methods are for the determination of anthocyanogens, tanoids and flavonoids. For the determination of individuals polyphenols is the most widespread method HPLC (reverse phase) with different types of detection. Less widespread method is GC with MS detection, from point of view analyte derivatization.This article describes the ways of analytical determination of polyphenols in brewing. The methods for this...
Non sustainable development. Difficulties with definitions of sustainability.Not peer-reviewed article
Lubomír NÁTR
Kvasny Prum. 2006; 52(4): 115-116 | DOI: 10.18832/kp2006011
Current "definitions" of sustainability cannot be considered serious definitions. They only represent a broad concept of a noble idea. In these "definitions" several terms are not sufficiently identified. For example, how can we define sustainability without considering the population of a country, the rate of population increase, whether it is rich or poor, and its resources. Generally only the "present generation" is considered. There are no specifications about the future needs of our successors. And the proclamation of the preservation of natural ecosystem services is totally absurd when so many changes continuously modify nature. The idea, often...