Kvasny Prumysl, 2006 (vol. 52), issue 7-8
Evaluation of Antioxidant Properties of Hop and Hop Products.Peer-reviewed article
Alexandr MIKYŠKA, Karel KROFTA, Danuša HAŠKOVÁ
Kvasny Prum. 2006; 52(7-8): 214-225 | DOI: 10.18832/kp2006020 
Several techniques of sample preparation and assessment methods were tested for evaluation of antioxidant properties of hop and hop products. Hot water or methanol was used for extraction of antioxidants. The antioxidant activity was determined using the techniques based on the methods already published by Chapon (photometric determination with dipyridyl-ferric complex), Kaneda (determination with free radical DPPH) and Ushida (determination of the EPR-T150 value). The method according to Ushida is limitary usable due to small differences of reducing activities of individual samples. The method according to Chapon is basically usable but it is less...
Antioxidative Activity of Intermediate Products in Brewing.Peer-reviewed article
Radoslav SELECKÝ, Daniela ŠMOGROVIČOVÁ
Kvasny Prum. 2006; 52(7-8): 226-227 | DOI: 10.18832/kp2006021
By means of FRAP (Ferric Reducing Ability of Plasma) method, based on ferric tripyridyltriazine complex by the antioxidants from sample was measured the antioxidative activity of sweet wort (equivalent of 1.92 mmol reduced iron per liter), hopped wort (2.46 mmol.l-1), green beer (1.89 mmol.l-1) and beer after maturation (1.63 mmol.l-1). The antioxidative activity of some beers from market varied between 1.52-2.57 mmol.l-1 (in case of alcoholic beers) and 0,95-1.46 mmol.l-1 (non-alcoholic beers).By means of FRAP (Ferric Reducing Ability of Plasma) method, based on ferric tripyridyltriazine complex by the antioxidants from sample was measured the antioxidative...
Non sustainable development. Climate changes in the Czech republic.Not peer-reviewed article
Lubomír NÁTR
Kvasny Prum. 2006; 52(7-8): 228-229 | DOI: 10.18832/kp2006022
The climate in the Czech Republic could also be characterized by an increase in the daily mean temperatures. Several Czech reports illustrate not only the temperature rise bur also changes in other weather characteristics. For example the number of days with temperatures below zero degree Celsius during the spring period decreased during the last century. The extreme dry and hot summer 2003 with several heat waves has been declared as an event proving with statistical significance higher than 90 % the anthropogenic effect on climate change. (In Czech, English summary only)
Drought - present and future meteorological hazard.Not peer-reviewed article
Zdeněk ŽALUD, Miroslav TRNKA, Pavel KAPLER, Daniela SEMERÁDOVÁ, Martin DUBROVSKÝ
Kvasny Prum. 2006; 52(7-8): 230-234 | DOI: 10.18832/kp2006023
Drought belongs to the climate extremes, which influence many branches of human activities. Selected methods of drought description and their application are reviewed in this contribution. Palmer drought severity index (PDSI) and Palmer Z-index were modified to construct spatial drought climatology for individual regions (e.g. whole territory of Czech Republic). Newhall model was used for the estimation of the soil moisture regime. Based on plausible climate change scenarios, possible projections of future drought and soil moisture regime development are presented.(In Czech, English summary only)