Kvasny Prumysl, 2010 (vol. 56), issue 7-8
Impact of hop raw material type on antioxidant behaviour of beer.Peer-reviewed article
Alexandr MIKYŠKA, Danuša HAŠKOVÁ, Tomáš HORÁK, Marie JURKOVÁ
Kvasny Prum. 2010; 56(7-8): 294-302 | DOI: 10.18832/kp2010035 
Trial all malt decoction brews (200 L) of 12% pale lager beer were hopped by a series of five hops from fine aroma variety (Saaz hops) to high-alpha variety and CO2 hop extract. Antioxidant properties were assessed by three methods, RC-DCPI, ESR-DPPH a ESR-T150 (lag time). Sensorial stability was assessed after heat ageing and three months' storage. The amount of hop antioxidants, polyphenols and free phenol compounds supplied by hopping strongly dropped from the aroma to the high-alpha variety. An important factor is the bitter acids/polyphenols ratio in hops. Beer hopped by Saaz hops contained 60 % more total polyphenols and 80 % more free phenolics,...
Determination of some disinfection byproducts in brewing water and beer.Peer-reviewed article
Jiří ČULÍK, Tomáš HORÁK, Vladimír KELLNER, Marie JURKOVÁ, Pavel ČEJKA, Danuša HAŠKOVÁ, Josef DVOŘÁK
Kvasny Prum. 2010; 56(7-8): 303-305 | DOI: 10.18832/kp2010036
Disinfection of the technological equipment during beer production is necessary. Trihalomethanes and haloacetic acids are the most frequent chlorinated byproducts of disinfection. We developed an efficient method for the determination of chloroacetic acid, bromoacetic acid and iodoacetic acid in brewing water and in beer. Solid phase extraction (SPE) was used for the sample clean-up, several SPE columns being tested. The compounds of interest were determined after methylation by capillary gas chromatographic analysis coupled with electron capture detector. A method of internal standard was used for quantitative determination. This procedure is suitable...
Karvina brewery history.Peer-reviewed article
Milan STAREC
Kvasny Prum. 2010; 56(7-8): 306-312 | DOI: 10.18832/kp2010037
The first written record of the town of Karviná is from 1305 and the history of the estate was closely connected with the local Karvínský of Karviná and Laryš dynasties (later Larisch and Larisch-Mönnich). The first written mention of the manor brewery is from the 16th century. The original brewery was located next to the old Karviná castle and its yearly beer output reached 850 hl. The boom in coal mining was accompanied by a fast increase in beer production, with which the original brewery could not cope. A new brewery, built in 1860, belonged to the most modern brewery establishments. The yearly beer output at the beginning of the 60 s of the 19th...