National Repository of Grey Literature 93 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Tractor trailer for transporting hop vines
Koláček, Lukáš ; Malášek, Jiří (referee) ; Kašpárek, Jaroslav (advisor)
This bachelor’s thesis deals with the design of a tractor trailer for transporting hop vines. The first part contains a research analysis of similar trailers and legislation. In the next part is analysed construction of the trailer, analytical calculations of dimensional and functional properties and chosing components. The last part consists of strength analysis critical points of the frame and chosen construction details with its evaluation. Partial drawing documentation is also included.
Bioflavouring of low alcoholic beer by dry hopping
Dušánek, Václav ; Mikulíková, Renata (referee) ; Pořízka, Jaromír (advisor)
This bachelor thesis deals with the influence of cold hopping of low-alcohol beers on analytical properties and sensory profile of beer. The effect of cold hopping was observed using the varieties Kazbek, Jazz, Mimosa and Uran. In the experimental part, the production process of low-alcohol beer using immobilized yeast is described. After the main fermentation, the low-alcohol beer was kegged into five cuvettes and after 20 days cold-hopped at a dose of 3 g/l with individual varieties. The effect of cold hopping with individual varieties on the organoleptic properties of the beer was observed. Bitterness was determined, with cold-hopped beers showing an increase between 17-24 % in bitterness. Furthermore, the ethanol content was determined by high-performance liquid chromatography at 2,14 % vol. A significant increase in all volatiles, in particular -myrcene and linalool, was found in the cold-hopped beers by gas chromatography with mass spectrometry. The sensory analysis showed that the cold hopping had a positive effect on the overall impression and masked the taste defects of the reference low-alcohol beer. The best hop evaluated for the use of the cold hopping method was the Kazbek variety. The Jazz and Mimosa varieties were also perceived relatively positively by the evaluators. On the other hand, the Uran variety achieved a worse overall impression than the reference beer.
Chmelové silice a možnosti jejich využití
Pokorná, Tereza
Hops is one of the basic raw materials for beer, but it can be used not only for beer very noteworthy are his healing abilities. Czech Saaz variety belongs to among the best hops in the world, whose quality is involved in both genetics and climate. In addition to the substances important to the taste and aroma of beer, it contains a number of other substances with health significance. The aim of this work was to determine the essential oil content in hop cones and pellets. Specify the content of selected components of essential oils and statistically evaluate differences in their content. In the literature to find healing effects of hops and hop possibility of using essential oils. The results show that a very significant effect was high variety on the total content of essential oils and essential oils into individual components (myrcene, caryophyllene, farnesene and humulene). The highest essential oil content was detected in samples of dried hop cones of Saaz hops variety recuperation forms (525 ul.100 g-1), while the lowest essential oil content was detected in samples of dried hop cones unrecuperation forms variety Saaz variety (295 ul.100 g-1) . Dried hop cones are demanding storage and dispensing. Hop pellets are most commonly used because they are easily dosed and stored.
Vývoj a rozmístění pěstování a produkce chmele ve světě
The bachelor thesis deals with the distribution of hops production and areas of hop fields according to the countries of the world and with the distribution of area of hop fields according to small districts of the Czech Republic. It also monitors the development of these distributions. In the introductory chapters of the thesis the hop literature and characteristics of hop as agricultural crop is given. Data for analyses comes from databases of the Food and Agriculture Organization - FAO (for countries) and the Czech land office (statistics for small districts), and they are transformed into resume tables, graphs and maps. In the long term, the largest hops producers in the world are the USA and Germany, with a considerable distance from the Czech Republic and China and, with a further distance from Poland and Slovenia. The number of hop countries is gradually decreasing and hops production is increasingly concentrated into the USA and Germany. The Czech Republic has the largest areas of hop fields in the Rakovník, Louny, Žatec and Podbořany small districts. The area of hop fields has decreased significantly in the Czech Republic.
Raw materials for beer production - history and present and their benefits for human health
NOHEJL, Vlastimil
This bachelor's thesis outlines the evolution of brewing from its outset to the present time. The aspects of production, processing, division, and composition of raw brewing materials are described in detail as well as the possibility of using alternative plant components to create non-traditional beers. The next chapter outlines the process of beer production with the emphasis on the individual technological operations and the importance of mashing temperatures. Since beer is a natural, nutritionally rich, fermented beverage, the final part of the thesis examines its health benefits.
Comparison of selected parameters of draft beers and lagers from breweries and microbrewery
The dissertation compares selected qualitative parameters beers on tap and lagers produced in large breweries and mini-breweries. The first part of the thesis briefly describes the basic raw materials for beer production. This is followed by a description of the production technology,which includes the production of malt and wort, fermentation and the finishing of beer. The practical part of the dissertation describes selected types of beer. Values obtained from a component analysis of beers are evaluated in tables and graphs. Individual beers are assessed mainly according to the alcohol content (% vol.). The difference between the microbrewery and large breweries was insignificant. The work includes sensory evaluation of selected samples. Taste, aroma, opacity, carbonation and bitterness of beers are assessed. The best rated beer in the sensory rating was Samson BOCK. From the mini-brewery Čtyrák 12 ° light premium lager beer was the best.
Pests and diseases of hop - factual information database and e-learning system
This work deals with making factual database for crop Humulus lupulus L. The information, contained in the database falls within the protection of plants and more specifically to the field phytopatological, entomological and phytosanitary. Literature research provides an overview of the issue and information technology. The database has been compiled in the years 2007 - 2009 and the idea is to create a system for diagnosis and effective source of information for plant protection. For the creation of databases and educational system have been used languages PHP, HTML and cascading style sheets to format the graphic. For the purposes of the database was used by the SQL language and relational version of MySQL. The system is a detailed description, bionomics and protection. The system also contains a considerable number of pictures. The results are presented as a guide for working with the system.

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