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Hodnocení agrokomodity ječmen jarní z hlediska využití na trhu
Spousta, Jakub
Bachelor thesis on the topic of "Evaluation of an agrocommodity barley in terms of its usage in the market", describes significance of barely growing in the Czech Republic. In the first part of the work there is a brief literary overview of malting barley, types of malting barley, evaluation of cropped seed and significance of the crop from a perspective of malting and brewing. Furthermore in the work there is an insight into comparison of development of market price of malting barley, a production and export and both floricultural and economic contribution of production of this crop and growing profitability.
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Determination of zearalenone in malting barley
Wawroszová, Simona ; Čumová,, Martina (referee) ; Běláková, Sylvie (advisor)
This bachelor thesis deals with monitoring of zearalenone content in malting barley using immunochemical method ELISA and consequently method of liquid chromatography with mass spectrometry (LC-MS/MS). Theoretical part describes the brewing raw materials and important toxinogenic filamentous fungi. Special attention was drawn to selected fusarium mycotoxins (fumonisins, trichothecenes, zearalenone). It also describes some methods for determination of mycotoxins. Experimental section describes analyze 90 samples of malting barley of different varieties using method ELISA. In 19 samples zearalenone concentration was higher than limit of quantification. The highest level of zearalenone concentration (39,2 g•kg-1) contained barley, variety Wintmalt, where corn was used as a fore-crop. The samples were subsequently analyzed by LC-MS/MS. Zearalenone concentration was higher than limit of quantification only in four samples, namely in samples of Blaník, Malz and Wintmalt varieties of barley. Furthermore, the samples of intermediate products of malting process were analyzed by LC-MS/MS. No sample showed level of zearalenone higher than limit of quantification.
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Changeof phenolic acids content during malting of spring barley
Štýblová, Romana ; Janoušková, Eva (referee) ; Běláková, Sylvie (advisor)
This bachelor thesis deals with detection of chosen phenolic acids (sinapic acid, caffeic acid, ferulic acid, syringic acid, p – hydroxybenzoic acid, vanillic acid and p – coumaric acid) in the malting barley and monitoring of their changes during making a malt in real enviroment of floor malt house. Tehoretical part describes individual phenolic acids, their presentation in raw material for making of malt and methods for determination . There is described technology of making a malt. The nine samples was taken in experimental part. There were a malting barley, intermediate products of malting, malt and rootlets. Phenolic acids were extracted by alkaline and acid hydrolysis. This samples were detected by Ultra high – performance liquid chromatography using of UV detection (UPLC/PDA).
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Varietal quality of malting barley
KADLECOVÁ, Helena
By purchasing malting barley the quality is evaluated according to standards, techniques, laboratory methods and qualitative indicators, which are set by norm. Evaluation of quality of barleycorn as a material for producing malt is used for setting the price, observing changes of the quality during storing etc. There were evaluated qualitative indicators of 13 sorts of malting barley, which were bought by company ZZN Pelhřimov between 2010-2014 from farmers, agricaltural cooperatives and companies and also self-employed farmers from the region Vysočina. These sorts were represented by different number of samples in connection with bought-up amount and number of supplies of each sort. Weighted averages were counted from results. Average figures of results of analysis were compared with the national average. Research institute of brewer´s and orchardist a.s. in Brno deals with monitoring of quality of malting barley in the Czech Republic and it evaluates annually ca. 500 harvest samples which were received by producers from all regions in the Czech Republic. The quality of malting barley showed a big variability in all parameters across all types and also in particular years. Malting quality is influenced by many factors especially by course of weather in each particular year. Limiting parameter of quality by purchasing malting barley was N- substances content in barleycorn. Germination capacity seems to be the most stable from all parameters. Lower figures of germination capacity were found only by winter types in connection with longer period of ripening after harvest.
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Vliv odrůd ječmene na úroveň technologických znaků
Podsedková, Eva
Abstrakt I'm introducing the presentation which evaluates the effect of species, location and annuality to the basic technological characteristics of malting barley ( crude protein content in grain of barley, wort extract content , relative extract at 45 ° C , diastatic power , final attenuation , friabilitity , the content of beta - glucans in wort and wort viscosity ) . The kind of species affected more than 50 % and more of the friability and beta-glucans ,and more than 40 % relative diastatic power of the extract at 45 ° C and the attainable degree of fermentation. Extract in the wort was affected by species only from 22%. The location affected mostly a crude protein content (26 %). The content of the extract in the wort was significantly influenced by annuality (42 %). The known relationships between the relative extract at 45 ° C and Kolbach's number, friability and content of beta - glucan in wort , crude protein extract and wort, were confirmed again . Also, very strong correlations were found between characters showing the cytolytic and proteolytic modification.
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The quality of barley for food and feeding
KADLECOVÁ, Helena
By the purchasing of malting barley and fodder barley from collective farms, companies, smaller enterprises and also independently farming farmers the quality is evaluated by indicators which are determined by valid standards. A range of factors participating in resulting grain quality. The quality criterions and laboratory methods were created in order to specify the quality of barley in the company laboratory ZZN Pelhřimov. Average values of the results of analysis of malting barley in years 2008 - 2012 were compared wiht the national average which its yearly evaluated by ČÚPS in Brno. In addition to the genetical base the malting quality is mostly influenced by the sequence weather in individual years.
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The quality of raw materials for beer production
SOUČEK, Martin
The subject of the thesis "The quality of raw materials for beer production" is a quality brewing ingredients - barley malt, malt, hops, water and brewer's yeast. Individual ingredients are generally characterized. The main part of the thesis deals with the assessment of quality of raw materials according to various criteria such as the genetic basis, agroecological factors, and technological requirements. The paper also discusses the methods of measurement quality.
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