|
|
Vliv odrůdy ječmene a technologie výroby sladiny na výtěžnost lihu při výrobě whisky
Šubrtová, Sára
This thesis briefly deals with the raw materials used to make whisky, malt, malting and whisky and its production. A significant part of the thesis also analyses certain influences that affect the yield of alcohol in the production of whisky. The aim of this thesis was to examine the effect of different varieties of barley and technologies of wort production on the yield of alcohol in whisky production. A total of 18 different distillate samples were produced, tested and compared. The samples differed in the used barley variety, type of malt and technology of wort production. The used barley varieties were Maltz, Radegast and Valerie. The samples were malted in a micro-malting plant for Pilsner and diastatic malt. The production technology of wort was carried out in three different ways, under different time conditions. The whole production of samples and determinations were conducted in three repetitions. For all samples, the density was pycnometrically determined and the ethanol concentration and alcohol yield was set. The obtained results were evaluated, statistically processed, compared with each other in each category and discussed. According to the results, the highest alcohol yield among all samples was identified by the sample produced from the Maltz barley and Pilsner malt by using a long technology of wort production. The lowest yield was observed in the sample produced from Radegast barley, Pilsner malt and by using a medium long technology of wort production. The results of this thesis showed that Maltz barley and diastatic malt were the most suitable for whisky production in terms of alcohol yield. Further, in terms of wort production technology, the short wort production technology was found to be the most suitable.
|
|
|
Změna řezných parametrů a jejich vliv na granulometrické složení při broušení materiálu ThermoWood
Vráblík, Michal
The diploma thesis is focused on wood dust arising from grinding three different materials. It is a native pine and two stages of heat-treated pine wood. The work examines the effects of sliding speed, belt grain size and type of material on wood dust formation. The following parameters were selected: vf = 3; 6; 9; 12 m/min, grain size 60 and 80. The results were extended by the results of the bachelor’s thesis, where an abrasive belt with a grain size of 100 was used. The experiment was performed on a wide belt grinder Buldog 7. The dust generated during grinding was subjected to particle size analysis using a sieve analysis on a vibrating sieve machine. A set of sieves with mesh sizes 1000, 500, 250 and 100 µm ending in the bottom was used. Microscopic analysis of the fine dust was performed on a digital microscope, from which the necessary data were obtained by image analysis. This was evaluated using the Weibull model and statistical analysis. The obtained results showed the effect of thermal modification, influence of sliding speed and sanding belt grit on the formation of abrasive dust. Thermally modified materials produce more fine dust than native wood. Regarding the sliding speeds it was found that as the sliding speed decreases, the fine dust content increases. Studying the effects of the grain size of the sanding belts showed that increasing grain size leads to more fine dust being formed. Evaluation of the microscopic analysis based on Weibull's model showed that the highest probability density of fine particles is below 5 µm grain sizes for all materials. The material reached the highest values for all three types of grains material LunaThermo -D.
|
|
|
Vliv odlišné meziřádkové vzdálenosti na výnos kukuřice na zrno a siláž
Tichý, Marek
In this thesis „The impact of a different row spacing on a corn yield used for grain and for silage“data from a two-year field field experiment from 2020 and 2021 are processed, which show the effect of row spacing on the final yield of both silage and grain. The experiment was focused on four variants of narrow rows with a row spacing of 0.375 m with sowings of 80, 85, 95 and 105 thousand grains, compared to the usual one with a row spacing of 0.75 m with a sowing rate of 80 thousand grains. The results of the experiment show that the grain yield was higher with narrow-row technology, especially with the sowing of 105,000 grains. It is also applied that the grain yield increases with increasing sowing. The yield of silage was the highest in both years for maize grown in 0.375 m rows with sowings of 95 thousand and 105 thousand grains. The impact of the row spacing on other parameters such as plant height, silage content and grain moisture was also assessed.
|
|
|
Aplikace metody stabilních izotopů při studiu působení stresových podmínek u obilnin
Pernicová, Natálie
The aim of the thesis was to determine whether and how the values of stable isotope ratios δ13C (13C/12C) and δ15N (15N/14N) change in selected varieties of winter wheat, winter rye, spring rye and spring triticale. It was shown that δ13C and δ15N isotope ratios in harvested grains differ in individual species and varieties. It was found that even short-term impacts of stress conditions: drought, temperature, vapour pressure deficit (VPD) and CO2, concentration during plant development have an effect on the final isotopic composition of the grain. Drought conditions led to the expected increase in δ13C only in winter rye. However, winter wheat was more sensitive to the increase in VPD. Drought (rye, triticale) led to a decrease in δ15N ratio, but high temperature (wheat) increased it. As expected, elevated CO2 concentration (wheat) reduced δ13C ratio, but not under drought or high VPD conditions. Changes in both δ13C and δ15N isotope ratios further suggest that C and N metabolisms have been altered under investigated stress conditions.
|
|
| |
|
|
Granular Synthesis in Music Production
Pečinka, Pavel ; Glembek, Ondřej (referee) ; Černocký, Jan (advisor)
Cílem této práce je navrhnout a vytvořit aplikaci pro granulární syntézu, využitelnou v hudbení produkci. Aplikace je implementována jako VST3 zásuvný modul s využitím frameworku JUCE a programovacího jazyka C++ a je schopná propojení s programy typu Digital Audio workstation, zkráceně DAW, což jsou programy sloužící jako centrální bod pro hudební producenty, kde mohou mimo jiné vytvářet nové zvuky, provádět mixování skladeb a vytvářet zvukové nahrávky. Tento zásuvný modul je navržen jako sampler a je schopen nahrát zvukový soubor obsahující audio data, která dále využívá pro další zpracování a následné přehrávání. Z vyhodnocení uživatelského testování vyplývá, že je tato aplikace použitelná pro hudební produkci jako nástroj pro granulární syntézu.
|
|
|
Influence of carbon dioxide elevated concentration on wheat flour quality
Drahovzalová, Kateřina ; Márová, Ivana (referee) ; Hrstka, Miroslav (advisor)
This thesis studied the influence of elevated carbon dioxide concentration on the properties of ears, grain and flour in two varieties of wheat (Triticum aestivum). The Vánek and Septima varieties were grown in special greenhouses, both in normal atmosphere with carbon dioxide concentration (AC = 385 ?mol?mol-1), and at elevated carbon dioxide concentration (EC = 700 ?mol?mol-1). Quantitative analysis of grain (the content of crude protein, starch, moisture and hardness of grain) was carried out using NIR, gluten content (gluten index) was determined after washing with water and gluten quality was expressed as falling number. Total crude protein content was determined according to Kjeldahl, total amino acids and amino acids content by ion exchange chromatography. Variety Vánek showed significantly larger size of the spikes, more grains and higher grain weight, when it was cultivated in the atmosphere of elevated CO2 concentration. For variety Septima, the size of AC and EC ear variants was comparable, but the ears of corn grown in the EC had a significantly greater number of grains and greater weight. Vánek variety grown in elevated CO2 concentration had lower weight of 100 grains, Septima variety grown in elevated CO2 concentration had greater weight of 100 grains. The varieties Vánek and Septima grown at elevated CO2 concentration showed significantly lower content of crude protein (28.4%) and gluten index (by 34.6%). In comparison with the AC variant, EC also showed lower overall content of crude protein and amino acids.
|
|
|
Recovery and recrystallization of austenitic steel 08Cr18Ni10T
Čech, Jan ; Gregor, Martin (referee) ; Foret, Rudolf (advisor)
This thesis deals with influences of graded deformations, temperatures and holding times on the grains and subgrains size in steel 08Cr18Ni10T. In literary part of the thesis there are described static and dynamic annealing treatments, then also austenitic stainless steels and some selected types of their processing. In experimental part there is studied grain size on differently deformed samples annealed in temperature range 1050–1200 °C for 10, 50 and 100 minutes. Analysis of present structures units was perform by EBSD. Except of that, there were realized chemical analysis of selected inclusions and also hardness test were realised. Achieved measurement shown, that grain size of chosen steel is depended on all 3 variable values.
|
|
|
Project of grain silo
Pilař, Vlastimil ; Malach, František (referee) ; Malášek, Jiří (advisor)
The goal of the Master thesis is to design a grain container. The thesis involves a possible method of grain storage depending on the quality and condition of the grain and also the ways of filling and emptying the container with all the problems that might occur. The thesis deals for example with a possibility of occurrence of vault and with it associated change of state of stress, or with the pressure surges in the container. The thesis involves an analysis of an appropriate construction solution, a design of the main dimensions of the container and a test calculation of the container ´s strength.
|
|
|
Methods to increase the visibility of the original austenite grain boundaries in steels
Gamanov, Štěpán ; Klakurková, Lenka (referee) ; Juliš, Martin (advisor)
This thesis deals with methods of revealing prior austenite grains in steels. The objective was to describe and demonstrate these basic methods on samples. The theoretical part deals with the importance of austenite grain and its size, with description of base methods of revealing austenite grains, and with methods of determination of grain size. The practical part consists of pictures and commentary of samples wich were made with some of the base methods described in the theoretical part. Conclusion consists of comparison of our and external results and also expanding commentary on individual methods.
|
guest ::
