Kvasny Prumysl, 2018 (vol. 64), issue 5

Effect of fungicidal treatment and storage condition on content of selected mycotoxins in barleyPeer-reviewed article

Pavel HORKY, Sylvie SKALICKOVA, Iva CASLAVOVA, Amanda J. DEERING, Pavel NEVRKLA, Petr SLAMA, Vaclav TROJAN, Jiri SKLADANKA

Kvasny Prum. 2018; 64(5): 212-216 | DOI: 10.18832/kp201827  

The aim of the study was to determine the effect of fungicidal treatment and storage on the occurrence of mycotoxins in barley (Hordeum vulgare L.). Barley was initially inoculated with Fusarium culmorum followed by the application of fungicides (prothioconazole and bixafen). A screening of 57 mycotoxins were performed using ultra-performance liquid chromatography in tandem with mass spectrometry. The fungicide treatment affected (P <0.05) the levels of zearalenone, β-zearalenol, arternariol and alternariol-methylether that were present. Levels of deoxynivalenol was highest in the second year of monitoring. 3-acetyl-deoxynivalenol was not affected...

Measurement of yeast concentration in rectangular and cylindrical cuvettePeer-reviewed article

Jan ŠAVEL, Petr KOŠIN, Adam BROŽ

Kvasny Prum. 2018; 64(5): 217-223 | DOI: 10.18832/kp201825  

Knowledge of yeast concentration is necessary for the pitching rate estimation. Centrifugation and turbidimetric method present rapid and easy methods for the determination of yeast concentration. There are many variants of such techniques to monitor laboratory fermentations even in test tube sizes. Procedures with and without sodium hydroxide solution were compared and evaluated. A simple calculation procedure is based on two parameters, which have to be determined for the local condition of each brewery. They cover yeast dry matter content of yeast sample and the yeast count related to 1 g completely dry yeast. It enables to calculate the probable...

A device monitoring turbidity and color changes of beverages directly in bottled samplesPeer-reviewed article

Petr GABRIEL, Karel SIGLER

Kvasny Prum. 2018; 64(5): 224-232 | DOI: 10.18832/kp201831  

Color and turbidity are important properties of fermented beverages, especially light and dark beers, white and red wines and spirits. The spectrum of absorption and scattering of light is a decisive and very important analytical parameter of the consumer's quality and health acceptability of the beverages. A large number of the above types of beverages are filled into transparent glass and plastic bottles that allow for optical measurements. The Colorturb prototype has been designed, developed and constructed to determine color changes and turbidity in commercial packaging. The device uses a red-green-blue (RGB) light-emitting diode as a light source...

Brewing microbiology - bacteria of the genera Bacillus, Brevibacillus and Paenibacillus and cultivation methods for their detection - part 2Peer-reviewed article

Martina BROŽOVÁ, Petra KUBIZNIAKOVÁ, Dagmar MATOULKOVÁ

Kvasny Prum. 2018; 64(5): 233-241 | DOI: 10.18832/kp201829  

This publication is a sequel to the study Microbiology of brewing - bacteria of the genera Bacillus, Brevibacillus and Paenibacillus and cultivation methods for their detection - part 1 (Brožová et al.: Kvasny Prum., 64(2): 50-57, 2018). We monitored the growth of 5 brewery significant strains of the genera Bacillus, Brevibacillus and Paenibacillus on solidified culture media. The publication contains photographic documentation of bacterial colonies and the use of culture media in the laboratory of brewing operations is discussed.

Brewing microbiology - bacteria of the genus ClostridiumPeer-reviewed article

Martina BROŽOVÁ, Petra KUBIZNIAKOVÁ, Dagmar MATOULKOVÁ

Kvasny Prum. 2018; 64(5): 242-247 | DOI: 10.18832/kp201830  

In most cases, the Clostridium species rank among the sporogenic obligate anaerobes, which are sensitive to bitter hop substances and acidic pH. Thus they rank among the less dangerous contaminants in brewing operations. Their increased incidence in breweries can be linked to the modernization of technologies, which reduces access to oxygen in individual production phases. The endospores of Clostridium bacteria were isolated, e.g., from the storage vessels for liquid malt substitutes (glucose, starch syrups). They are able to survive the conditions of mashing and wort boiling, but they can not germinate in the following phases of beer production. However,...

Fifty years of Hurbanovo malteryPeer-reviewed article

Tomáš KRAJČOVIČ

Kvasny Prum. 2018; 64(5): 248-257 | DOI: 10.18832/kp201826  

In April 2017 it was exactly half a century since construction work on malting plant was completed, and in October it was 50 years since the first tonnes of Hurbanovo malt had been produced. The maltery was then a part of the state-owned enterprise Západoslovenské pivovary a sladovne, Bratislava. Once everything was completed, the maltery consisted of 64 steeping tanks, 16 Wanderhaufen system lines and four double-floor kilns. The planned malt production capacity of 30,000 tonnes was already achieved in 1968. Organisational change in 1984 caused the creation of the separate state-owned enterprise Zlatý Bažant, Hurbanovo. After the new germination facility...

Brewery in Jablonné v Podještědí - historical developmentPeer-reviewed article

Miroslav KOLKA, Milan STAREC

Kvasny Prum. 2018; 64(5): 258-262 | DOI: 10.18832/kp201828  

The first written document on brewing beer in Jablonné v Podještědí, conducted by the brewing-law burghers dates back to 1399. After the Thirty Years´ War there were many disputes over the right to brew between the city and the suzerain. The original location of the brewery is unfortunately unknown. In 1864, the Jablonné brewers bought the burnt-out church of the Birth of the Virgin Mary and gradually adapted it to malting and brewing purposes. The adaptation of the sacral structure to the brewery is unique in the Central European region. The former church served as a brewery until the mid-1920s and was used for various purposes without major maintenance...

From other journalsNot peer-reviewed article

Alexandr Mikyška

Kvasny Prum. 2018; 64(5): 264-270