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Možnosti využití kořenících směsí a aromat v pekárenství a těstárenské výrobě
Skácelová, Andrea
My master thesis: The Possibilities of spice blends and flavors in baked goods and pasta production deals with the use of spice mixtures in an unusual way. In this thesis, spices are described in great thought and detail, then focuses on the description of baked goods and pasta production. The practical part of this paper is created and tested from recipes for bread production using various mixtures of spices and tested by sensory and instrumental analysis. Additionally, the pastas were prepared with mixtures of spices, sensory assessment, and laboratory analysis. The results were summarized in tables and graphs, and evaluated by available statistical methods.
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Vůně a chuť vína
Tesařová, Marika
The Bachelor's project describes the general nature of vine, wine production technology, methods of wine judging, and the related legislation. The project's main part describes the formation of aromatic substances and wine aroma groups. Each group is represented by the aromatic substances accounting for the group aroma as well as by the specific variety wines each with a suitable dish. The general rule is that white variety wines should be combined with white meat – poultry, veal and fish while red wines are recommended for red meat such as beef, venison. In addition to the primary factors such as soil, variety properties, climate, the overall wine aroma may also be influenced by the technological procedures used in wine production.
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Kerblík - jeho biologická charakteristika a možnosti celoročního pěstování
TŘÍLETÁ, Jana
Chervil is an important plant not only like the green herb but also for its health effects. The research also deals with other species of chervil, therefore these, which grows in the wild in the Czech Republic, are mentioned marginally. The aim of this thesis was to verify the possibility of cultivation of chervil in the Czech Republic during all year and to describe its biological properties. The conditions for the growing of chervil and their influence on growth rate and yield were assessed in a small-plot trial, established in 2018 in Náměšť nad Oslavou. Sowing was carried out gradually in 7 terms (from April to September). The growth, the time of emergency, the number of emerged plants, the occurrence of weeds, diseases and pests, the length of vegetation, the height of plants, and the yield of leaves were evaluated: Protein, fiber, mineral (Ca, Cu, Fe, Mg, Mn, F, K, Na, Zn) content was determined in the chervil stalks. The smell and taste of chervil were evaluated sensory. Kitchen use of chervil has been verified on several meals. We can recommend also chervil growing indoors. The sowing in August reached the yield of 2.1 kg/ha and the plant height was 35 cm on the 45-th day of vegetation in field conditions. Intercropping of chervil with radishes can be recommended. For culinary use, we can recommend chervil instead of parsley or in the mixture of fines herbes with chives, parsley and tarragon.
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Srovnání terpenických látek v bobulích a víně vybraných muškátových odrůd
Rubešová, Hana
The target of the thesis was to study all of the available literary sources concerning the aromatic substances, focusing on terpene compounds and characterize the selected must muscat variety. In the experimental part was established the content of free and bound terpene compounds for these varieties both in the must and also in the wine made subsequently. The results obtained were processed and evaluated. There was selected six muscad varieties to study (Aromína, Cvětočnyj, Gőcseji zamatos, Irsai Oliver, Lena, Moravian Muscat) from vineyards of the horticultural fakulty in Lednice na Moravě. First there were established basic analytical values in the must (pH, sugar content, acidity) and then the content of the residual sugar and alcohol in the subsequently made wine. The terpene compounds in the must berries and wine were laid down by the extraction of an organic solvent and this modified extract was then used for GC-MS analysis. The most of all (free and bound) terpene compounds in the must (berries) showed Lena variety, followed by the Moravian muscat. Least of these substances contained the variety Cvětočnyj. The highest value from terpene compounds represented traditionally linalool (most in Moravian Muscat), geraniol (Lena), alpha-terpineol (Lena). Most of the terpene compounds in wine showed variety of Moravian muscat, followed by a variety of Cvětočnyj and Lena. Least of these substances contained the variety Aromína. The highest values were measured for linalool, 2,6-dimethyl-3,7-octadien-2,6-diol and alpha-terpineol were all found in the Moravian muscat. Overall, in the must (berries) were measured much higher concentrations of the terpene compounds than in wine. On average, most of these substances in the must and the wine showed Lena and Moravian muscat varieties. They can be therefore rocognized as the most aromatic varieties of these six selected ones.
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The portable device for aroma detecting in food industry
Beneš, David ; Jankovský, Jaroslav (referee) ; Adámek, Martin (advisor)
This work deals with the construction of a simple cheap portable device that allows the measurement and recognition of aromas in food industry using semiconductor gas sensors with the ability to share measurement data to a remote server. The device is controlled by Arduino development platform, enriched by two modules. Work shortly apprises readers with aroma monitoring in food industry and development board Arduino which contains ATMega series microcontroller and with module for network communication. This work also includes a measurement sample and review using the proposed circuit.
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Senzorické odlišnosti odrůdových vín
Ficová, Michaela
This bachelor thesis deals with Sensoric differnces of wine varieties and was written during the academic year 2014/2015 at the Deparment of Post-Harvest Technology of Horticultural Products at the Faculty of Horticulture at the Mendel University in Brno. The purpose of the thesis was to describe the organoleptic properties of wines and substances that cause them. The thesis was focused primarily on following varieties; Rhein Riesling, Chardonnay, Sauvignon, Pinot Noir and Cabernet Sauvignon. Further it evaluated the organoleptic data of the wines. These data describes the complete score, profile of the structure and mightiness and the profile of its aroma.
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Characterisation of elderberry fruits
Christovová, Silvia ; Diviš, Pavel (referee) ; Vítová, Eva (advisor)
This master's thesis deals with the characterization of elderberry fruit (Sambucus nigra L.) with emphasis on the aroma active compounds (AAC) and vitamin C (ascorbic acid (AA), dehydroascorbic acid (DHA)). The theoretical part gives a brief outlook on the chemical composition and attributes of Sambucus berries, its healing properties and the means of processing. The rest of the theoretical part thoroughly examines the AAC and vitamin C. The suitable assessment methods are also discussed. The experimental part of the work consists of two main tasks. The first one was to assess the aroma profile of Sambucus berries using the HS-SPME-GC-FID. 18 samples were examined (the wild elderberry and 17 cultivated varieties). In total, 24 different volatile aroma active compounds were identified and quantified, 12 of which belonged to alcohols, 5 to aldehydes, 4 to esters, 1 to acids and 2 “other” compounds (linalool and -damascenone). The chemical composition of the individual samples was not uniform; no single sample contained all of the identified compounds. The second task was to assess the total vitamin C content (the sum of DHA and AA) using the HPLC. For the purpose of reducing DHA to AA three reducing agents were examined (DTT, TCEP and L-cysteine) at two different pH levels (7 and 4). TCEP at pH 4 turned out to be most efficient and was subsequently applied on the samples of 5 selected elderberry varieties. The measured vitamin C content was within the range of 5,1 – 13,0 mg per 100 g of fruit.
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Influence of producing technology on flavour of Edam cheese
Urbanová, Andrea ; Buňka, František (referee) ; Vítová, Eva (advisor)
This work deals with the problem of flavour of Edam cheeses, i.e. natural hard cheese with low heat curd. The samples came from dairy MILTRA B s. r. o. Městečko Trnávka. A number of aroma active substances contribute to flavour of cheese. From the chemical point of view they are volatile compounds, including alcohols, aldehydes, ketones, fatty acids, esters, lactones, terpenes etc. Their content increases during ripening by influence of proteolytic and lipolytic changes and creates aroma, which is characteristic for type of cheese. The development of these components was monitored in chosen Edam cheese (30 % fat in dry matter) by headspace-SPME/GC method. The fiber CARTM/PDMS 85 µm was used for extraction of aroma compounds. The samples were taken from cheesemilk up to technologically ripe cheese. In total 30 aromatic compounds were identified, their content increased during ripening. The first increase was observed after pressing and then especially in second part of ripening. For comparison Edam cheese samples were also sensorially evaluated during ripening. The ordinal scale and profile tests were used for evaluation of organoleptic properties (appearance, texture, taste, aroma). The sensory quality was improved during ripening, but significant changes were not observed with regard to fine taste and smell of Edam cheese given by globally low content of aroma active compounds.
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Aroma active compounds of several kinds of chocolate
Glouzarová, Markéta ; Vespalcová, Milena (referee) ; Vítová, Eva (advisor)
This diploma thesis is focused on the problem of volatile aroma active compounds in chocolate, directly connected with the formation of chocolate aroma. Organoleptic properties of chocolate (aroma and taste) are the most important for evaluating by consumers. In this work four types of plain chocolate: Figaro Sweet Passion 70 % cacao, Figaro plain chocolate, Figaro for cooking and KAUMY chocolate glaze were tested. SPME method (fiber CAR/PDMS 85µm) in conjunction with gas chromatography was chosen for their analysis. Solid phase micro-extraction (SPME) is simple, sensitive, reproducible, rapid and low-cost method for evaluation of key odorant compounds found in cocoa and chocolate products. Using SPME-GC method total 56 aromatic compounds: 14 acids, 9 aldehydes, 8 ketones, 17 alcohols, 7 esters and 1 nitrogen compound were identified and quantified. Taste and aroma are the most important for evaluating of chocolate by consumer. Taste and aroma should be aromatic, pleasant and after used raw material. The single organoleptic properties (appearance, colour, taste, aroma and texture) were observed by sensory analysis using scale and also aroma and taste profiles of samples were created. The assessors were students and staffs faculty of chemistry BUT. The high content of alcohols (methanol, ethanol, propanol, butan-2,3-diol) and fatty acids was found in all types of chocolate , these compounds are probably important components of chocolate aroma. Some detected aromatic compounds doesn´t contribute positively to typical chocolate aroma. Unpleasant odour of these compounds often influences total flavour of chocolate, which was also proved by sensory evaluating.
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