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Volatile profile of Edam type cheese
Balej, Marek ; Kovalčík, Adriána (oponent) ; Vítová, Eva (vedoucí práce)
This bachelor thesis is focused on specification volatile profile of eidam cheese types, which are natural semi hard cheeses with low heat curd. Subject of theoretical part is basic differentiation of cheeses, description of chemical composition and characteristic of eidam cheese types. After that, issue of their manufacturing process is processed and aroma active substances are described. In the last part of this section, the attention is focussed on specification method of solid phase microextraction connected with gas chromatography with mass spectrometry detection. Experimental part deals with HS-SPME-GC-MS method application on identification of volatile compounds in eidam cheese types. Samples of model cheese were manufactured at Tomas Bata University in Zlín with the use of various added microbial starter cultures and eidam type cheeses with various fat content bought on the market. A total of 64 compounds were identified in samples; of those 18 alcohols, 11 esters, 9 ketones, 7 aldehydes, 5 acids, 3 lactones, 2 terpene hydrocarbons, 2 terpene alcohols, 1 terpene ketone, 1 terpene aldehyde, 4 sulphurous compounds and 1 phenol. The differences were found among model cheese samples and market bought samples in the case of number and type of volatiles.
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Biodegradable seed carriers for large area regeneration of forests
Balej, Marek ; Kučera, František (oponent) ; Jančář, Josef (vedoucí práce)
This diploma thesis is focused on finding a suitable biodegradable polymer for the construction of mechanically activated forest seed carriers. The subject of the theoretical part of the work is a description of the investigated polymeric materials and characterization of the species composition of trees in domestic forests. Furthermore, the issue of technology to produce these seed carriers for the preparation of prototypes using 3D printing and for high-volume production through plastic injection moulding is elaborated. Finally, in this section, attention is paid to the difference between biodegradable and compostable plastics. The experimental part of the thesis deals with the application of the method of determining the complete aerobic biodegradability of the investigated materials in the soil, measuring the amount of carbon dioxide released and additional DSC, GPC and TGA analysis. It further investigates the saturation of the samples with carbon dioxide, their subsequent temperature-induced batch foaming and SEM analysis of the resulting structure. Finally, it focuses on the preparation of 3D printed prototypes of seed carriers and test specimens, on which the tests of their impact strength and tensile properties are performed. For more detailed analysis, two commercially available bioplastics, NonOilen® and ecoflex® were selected. The test of complete aerobic biodegradability of plastics in soil according to ISO 17556 proved that the biodegradation of NonOilen® and ecoflex® in the soil took place. This was subsequently substantiated by the results of the associated DSC, GPC and TGA analysis. Furthermore, in pressed samples from both materials, it was found by SEM observation that the method of CO2 saturation and subsequent batch, temperature-induced foaming is ineffective in obtaining a porous structure in the given materials. Finally, the impact strength and tensile properties of 3D printed prototypes for the investigated materials (NonOilen® and ecoflex®) were determined using 3D printed test specimens.
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Biodegradable seed carriers for large area regeneration of forests
Balej, Marek ; Kučera, František (oponent) ; Jančář, Josef (vedoucí práce)
This diploma thesis is focused on finding a suitable biodegradable polymer for the construction of mechanically activated forest seed carriers. The subject of the theoretical part of the work is a description of the investigated polymeric materials and characterization of the species composition of trees in domestic forests. Furthermore, the issue of technology to produce these seed carriers for the preparation of prototypes using 3D printing and for high-volume production through plastic injection moulding is elaborated. Finally, in this section, attention is paid to the difference between biodegradable and compostable plastics. The experimental part of the thesis deals with the application of the method of determining the complete aerobic biodegradability of the investigated materials in the soil, measuring the amount of carbon dioxide released and additional DSC, GPC and TGA analysis. It further investigates the saturation of the samples with carbon dioxide, their subsequent temperature-induced batch foaming and SEM analysis of the resulting structure. Finally, it focuses on the preparation of 3D printed prototypes of seed carriers and test specimens, on which the tests of their impact strength and tensile properties are performed. For more detailed analysis, two commercially available bioplastics, NonOilen® and ecoflex® were selected. The test of complete aerobic biodegradability of plastics in soil according to ISO 17556 proved that the biodegradation of NonOilen® and ecoflex® in the soil took place. This was subsequently substantiated by the results of the associated DSC, GPC and TGA analysis. Furthermore, in pressed samples from both materials, it was found by SEM observation that the method of CO2 saturation and subsequent batch, temperature-induced foaming is ineffective in obtaining a porous structure in the given materials. Finally, the impact strength and tensile properties of 3D printed prototypes for the investigated materials (NonOilen® and ecoflex®) were determined using 3D printed test specimens.
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Volatile profile of Edam type cheese
Balej, Marek ; Kovalčík, Adriána (oponent) ; Vítová, Eva (vedoucí práce)
This bachelor thesis is focused on specification volatile profile of eidam cheese types, which are natural semi hard cheeses with low heat curd. Subject of theoretical part is basic differentiation of cheeses, description of chemical composition and characteristic of eidam cheese types. After that, issue of their manufacturing process is processed and aroma active substances are described. In the last part of this section, the attention is focussed on specification method of solid phase microextraction connected with gas chromatography with mass spectrometry detection. Experimental part deals with HS-SPME-GC-MS method application on identification of volatile compounds in eidam cheese types. Samples of model cheese were manufactured at Tomas Bata University in Zlín with the use of various added microbial starter cultures and eidam type cheeses with various fat content bought on the market. A total of 64 compounds were identified in samples; of those 18 alcohols, 11 esters, 9 ketones, 7 aldehydes, 5 acids, 3 lactones, 2 terpene hydrocarbons, 2 terpene alcohols, 1 terpene ketone, 1 terpene aldehyde, 4 sulphurous compounds and 1 phenol. The differences were found among model cheese samples and market bought samples in the case of number and type of volatiles.
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Sí´tové protokoly a sockety
BALEJ, Marek
Práce se bude zabývat síťovými protokoly a sockety a jejich využitím v programovacím jazyce C#. Bude se tedy zabývat programováním síťových aplikací na platformě .NET od firmy Microsoft a nástroji, které nám k tomu jazyk C# poskytuje. Budou popsány nástroje a metody programování síťových aplikací a ukáže vytvoření a popis ukázkových aplikací pracujících se sockety a aplikačními protokoly.
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