Kvasny Prumysl, 2015 (vol. 61), issue 2
Research and development in the RIBM - International project MUSE-Tech.Not peer-reviewed article
Research Institute of Brewing and Malting, Plc.
Kvasny Prum. 2015; 61(2): S1 
Research Institute of Brewing and Malting, Plc. (RIBM) entered the international field of European research as one of the partners in the project MUlti SEnsor Technology for management of food processes (acronym MUSE-Tech) The project no. 613665, which falls into the 7th EU frame program, call FP7-KBBE-2013-7- single-stage is solved by 12 partners from six EU countries (Spain, Great Britain, Finland, Holland, Italy, Czech Republic) (In Czech, English summary only).
Study of energy-saving wort boiling systems for Czech beer production.Peer-reviewed article
Alexandr MIKYŠKA, Martin SLABÝ
Kvasny Prum. 2015; 61(2): 26-33 | DOI: 10.18832/kp2015004
The effects of a low-pressure and dynamic low-pressure wort boiling systems on a brewing process economy and quality of the Czech beer were studied in a pilot scale trial brews (200 L) of pale lager beer, that had been prepared in agreement with Protected Geographical Indication Czech beer. The process parameters of brews were designed to make conversion of hop α-acids and thermal charge of wort in low-pressure and atmospheric wortboiling comparable. Despite the balance-reduced boiling time and equal iso-α-acids content in worts, low-pressure wort boiling systems showed increasing yield of iso-α-acids in beer in a series of atmospherics,...
The Occurrence of Ochratoxin A in Beers.Peer-reviewed article
Sylvie BĚLÁKOVÁ, Karolína BENEŠOVÁ, Renata MIKULÍKOVÁ, Zdeněk SVOBODA
Kvasny Prum. 2015; 61(2): 34-37 | DOI: 10.18832/kp2015005
In 2011-2014 the occurrence of ochratoxin A in beers from Czech retail network was studied. The beers included draught beers, lagers, special non-alcoholic beers and beer mixtures. Totally, 132 samples were analyzed. Ochratoxin A was detected in 81 % of the samples. Its concentration moved from 1.0-194.6 ng.l-1. Average ochratoxin A content in all samples in connection with the year of the occurrence was 14.2-39.9 ng.l-1. Ochratoxin A content was analyzed using the method of liquid chromatography with the fluorescent detection (UPLC/FLR).
Use of sensory analysis of beer in marketing.Peer-reviewed article
Pavel ČEJKA, Jana OLŠOVSKÁ
Kvasny Prum. 2015; 61(2): 38-45 | DOI: 10.18832/kp2015006
When developing new food products, or when trying to improve their existing competitive position in the market it is necessary to determine how consumers perceive their quality. That is the purpose of so-called consumer evaluation of product quality, one of its most important methods being sensory analysis. We review the basic survey of sensory tests suitable for evaluation of beer, i.e. acceptance testing, the method of verbal description, differential and preference tests. Practical examples are given, with detailed procedure and calculation. Also more complex procedures are mentioned which are suitable for marketing rating of products, such as QDA...
Analytical strategies for the determination of deoxynivalenol and its modified forms in beer: A mini review.Peer-reviewed article
Alexandra MALACHOVÁ, Elisabeth VARGA, Heidi Elisabeth SCHWARTZ-ZIMMERMANN, Franz BERTHILLER
Kvasny Prum. 2015; 61(2): 46-50 | DOI: 10.18832/kp2015007
The aim of this review is to provide a brief overview of analytical methods used for the determination of deoxynivalenol and its modified forms deoxynivalenol-3-β-D-glucoside, 3-acetyl-deoxynivalenol and 15-acetyl-deoxynivalenol in beer. The analytical methods discussed involve gas chromatography coupled with flame ionization detection, electron capture detection and mass spectrometry as well as liquid chromatography hyphenated to ultra-violet detection and mass spectrometry. Special attention was paid to sample preparation. Immunochemical methods such as enzyme-linked immunosorbent assays (ELISAs) which represent efficient tools for fast screening...
Antimicrobial nanomaterials in the food industry.Peer-reviewed article
Dagmar CHUDOBOVA, Kristyna CIHALOVA, Pavel KOPEL, Branislav RUTTKAY-NEDECKY, Marketa VACULOVICOVA, Rene KIZEK, Vojtech ADAM
Kvasny Prum. 2015; 61(2): 51-56 | DOI: 10.18832/kp2015008
Nanoparticles of metals interacting with cellular components and biomacromolecules including DNA and RNA alter cellular processes. Concerning the antimicrobial activity, the metal nanoparticles in nanomolar concentrations inhibit the growth of bacterial strains. Even though the general mechanism of metal nanoparticle action has not been fully understood yet, among current accepted schemes belong the damage of the microbial enzymes by the release of metal ions, the membrane integrity changes, penetration into the cytoplasm of bacteria and accumulation in the periplasmic space or the reactive oxygen species formation due to the effect of metal nanoparticles....