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Pralinky a variabilita jejich výroby
Pešák, Michal
In a first part of the bachelor's thesis is a research of literature concerning history of chocolate itself, legislative requirements, differentiating of a cocoa tree on particular breeds and processing of cocoa beans. In addition to that are mentioned technological steps of creating chocolate matter, its most common defects. The conclusion is dedicated to dessert candies – pralines. Within a practical part were created pralines with three different surface adjustments and three different fillings. As fillings were used peppermint, a passion fruit and salty caramel. Surface adjustments were done by food colours. Created pralines were silver-plated and marbled and compared with pralines with no surface adjustments. A sensory analysis was undertook and from results of sensory questionaries was created a sensory profile for each kind including statistical evaluation. Products were evaluated positively by evaluators, all were characterized by very good quality and execution, therefore no statistically great differences were noticed.
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Změna kvality jemného pečiva vlivem přídavku vlákniny
Šindelářová, Monika
The aim of the thesis The effect of addition of fiber on the quality pastry was to determine the effect of the addition of wheat fiber on the quality of fried pastry. There were fried 8 kinds of donuts with 0, 1, 3, 6, 9, 12, 15, 18 % of wheat fiber (WF 600). The quality assessment donuts included the sensory evaluation, the measurement of the volume donuts, of the firmness, of the crust colour and the crumb colour and the determination of the total content of fat of donuts. The firmness of donuts increased with the increasing the content of wheat fiber. The crust colour and the crumb colour of donuts with wheat fiber were lighter than donuts without wheat fiber. Wheat fiber had the positive effect on the absoprtion of the frying fat because the total content of fat of donuts decreased with the increasing the content of wheat fiber. The addition of up to 3 % of wheat fiber had positive effect on the volume, the appearance, the aroma and the flavour of donuts.
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Možnosti skladování a zpracování jedlých květů
Piechová, Sandra
Diploma thesis is focused on the storage and processing of edible flowers. Was stored 10 kinds of edible flowers in cold storage at 5°C and it was carried out in two ways: flowers in boxes packed in foil and using a partial vacuum. Statistical analysis of data was evaluated vacuum storage as more appropriate. Top storable species were flowers Tagetes and Calendula officinalis. As unsuitable for storage were evaluated flowers of Hemerocalis and Hosta lindheimeri. Selected edible flowers were then processed on floral vinegar, oil, butter and freeze-dried flowers. Based on sensory analysis have flower oils and vinegars same opportunity to succeed in the market. For freeze-dried flowers in parameter market application evaluators prefer flowers of Rosa and Malva sylvestris.
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Quality evaluation of gluten-free products with a focus on pastries
HANUŠOVÁ, Adéla
The topic of this diploma thesis is to design a gluten - free mixture made of natu-rally gluten - free types of flour, which will meet the technological and sensory properties of gluten - free pastery. To improve the structure, the milk thistle mol-dings were added to the dough. Pressings should improve nutritional value. The literature section defines the characteristics of bakery products, gluten - free bakery products and raw materials for these products. Following part is dedica-ted to the concept of gluten, its function in dough and related diseases. The conc-lusion of the literature search is devoted to the description of sensory analysis and the enriching component, milk thistle. The practical part deals with the experiment itself, which includes experimental testing and proposed suitable recipe, baking preparation and subsequent sensory evaluation. The determination of the specific volume of pastery was chosen as ano-ther evaluation parameter. The color of the bark and crumb was also measured for the resulting products. In the final part chemical determination of the nutritional benefit of milk thistle components was peformed. .
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VÝVOJ NOVÝCH RYBÍCH PRODUKTŮ PRO PŘEDŠKOLNÍ DĚTI
KALICOVOVÁ, Veronika
The aim of the diploma thesis was to develop newly innovative fish products. The intention is to increase fish consumption through new developed innovative fish products and proposed recipes. Fish supply healthy polyunsaturated fatty acids (PUFAs) and highly unsaturated fatty acids (HUFAs) to the human body, including eicosapentaenoic (EPA) and docosahexaenoic acid (DHA), which are essential for the proper development of the human organism. 11 new products and 13 new recipes were developed, which were subsequently sensory evaluated by the main target group of consumers. Preschool children were chosen as the target group of consumers, because their consuming habits are established in this life period. The new fish products have met all legislative standards and limits of food safety. Nine products were positively evaluated by the target group. Five products were selected for further analyses (fish balls, fish burgers, fish ham, fish mistura, fish sausages). The issue was theoretically studied according to worldwide research studies. In practice, the project was implemented with coordinated comprehensive cooperation with nutritionists, fish product technologists, but also with preschool facility employees, children and their families. The output of this work are new fish products which are available on the market. Fish products were made from the muscle of African catfish (Clarias gariepinus). The market offer of nutritionally high-quality foods which have a positive impact on human health has been increased. At the same, time several recipes from the African catfish (Clarias gariepinus), the common carp (Cyprinus carpio) and the rainbow trout (Oncorhynchus mykiss) have been proposed as a guide for easy preparation of healthy dishes.
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The effect of selected demographic factors on sensory evaluation and acceptability of commercial milks
TOMÁŠKOVÁ, Denisa
The diploma thesis was focused on a sensory evaluation of selected types of milk (pasteurized and UHT; both as 3.5% and 1.5% of fat content) and their acceptability depending on demographic factors. The next aim was to evaluate a questionnaire survey concerning this commodity. For sensory evaluation, the method of a paired preference test for a pasteurized milk and UHT milk of the same fat content was used. Furthermore, a ranking method for all samples was used. All the participants of the survey were university students. A total of 61 evaluators (average age 24.4 ? 6.7) participated in the sensory analysis and 106 respondents (35 ? 16.9) in the questionnaire survey. Research of the sensory evaluation revealed that evaluators preferred UHT milk and that they liked milks higher in fat more. Questionnaire survey showed that the taste of milk was the most important criterion for decision, followed by quality and the content of fat. Advertisement played the smallest part in a milk selection.
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Sensory evaluation and acceptance of dairy products and analogues by milk fat substitution
DOUBRAVOVÁ, Kristýna
Sensory quality of milk products where milk fat was replaced with vegetable fat might have an influence on consumer preferences. The objective of the thesis was to evaluate sensory properties of milk products and products in case of which a part or the whole share of milk fat is replaced with the vegetable one and furthermore, to assess the preferences in case of the selected group of evaluators. For this reason, a sensory analysis of three product pairs was done (whipped cream spray, cheese, chocolate dessert), using a preferential test in which 30 evaluators participated, as well as a questionnaire survey dealing with frequency and preferences of these pro-ducts (n = 80 respondents). From the sensory evaluation, it resulted that the only plant analogue that had a better score in all of the evaluated sensory properties than the product, in case of which milk fat was not replaced, was whipped cream in spray. The questionnaire survey confirmed that the monitored group of respondents preferred the product where milk fat was not replaced with the vegetable one. The most consumed milk product was butter - respondents consumed it daily or 1-2× a week in 84% of cases. Out of the plant products, the older group of respondents preferred coconut drink/cream (24%) and the younger one preferred plant drinks (32%). The results of the thesis then might contribute to being informed better about how plant products are perceived by consumers.
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Využití netradičních druhů obilovin pro výrobu běžného pečiva
Siudová, Dominika
The aim of the thesis The usage of non-traditional cereals in baking production was to determine the influence of the addition of flours made from unusual kinds of cereals on the quality of baking products. The theoretical part deals with ingredients and the technologies used in bread production and the description, material composition, properties and usage of unconventional cereals such as sorghum, corn, rice and Job's tears. The practical part is focused on the production of baguettes with the addition of flour from these cereals. The quality of the final baguettes was assessed by measuring the volume, firmness of packed and unpacked product during the first and the second day of storage. In addition, the colour of bread was measured and the sensory quality was evaluated. The addition of 5,5 % of these flours into the product did not have a significant negative effect on bread volume, its firmness and sensory properties. Although bread gained interesting colour and its nutritional value has raised up.
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Interakce mezi minerálnimi prvky v dietě brojlerů a jeji vliv na vlastnosti svaloviny
Prokop, Jakub
Diploma thesis deals with influence of mineral elements level in the diet of broiler chickens. Primary observe their importance in meat production with high nutritional and sensory quality. In experiment we tried to modulate the performance of chickens by changing the level of zinc (24 g, 204 g), calcium (2 g, 15 g) and magnesium (1,5 g, 4,5 g) and test the influence on sensory attributes of breast and tight meat. After slaughter in the age of 36 days the meat was processed and frozen stored. In sensory analysis (after heat processing) color, texture, odour, presence of strange odour, tenderness, juiciness, taste and presence of strange taste was judge. We discovered that different level of zinc has negative influence on the odour of tight meat (85,50+-2,108; 77,03+-3,333). Higher level of calcium and magnesium for the breast meat had positive influence on the color (83,53+-2,663; 88,50+-1,731) and negative influence on odour (86,10+-2,428; 76,66+-3,341), chewiness (77,73+-4,157; 63,33+-4,607) and taste (71,83+-4,325; 57,75+-4,532). In the end we can conclude that addition of different levels on mineral elements can influence organoleptic properties of meat and its acceptance for the consumer. It is necessary to do more experiments in this subject in the future.
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Kvalita toustových chlebů ovlivněná vlákninou
Premusová, Klára
The main aim of the thesis The quality of toast breads affected by fibre was to suggest a recipe with addition of wheat fibre (WF 600), potato fibre (KF 200), apple fibre (AF 12) and combination of wheat fibre and psyllium (WF 600 + P 95) in amounts of 3 %, 6 % a 9 % and further to assess the effect of added fibre to the quality of bread. I have done a baking experiment, a sensory analysis, universal tensile and pressure test. I´ve defined a colour of crumb and calculated nutritive value. The results were processed in Statistica 12 and MS Excel programmes. The addiotion of 3 % of psyllium and wheat fibre and 3 % of potato fibre had the best effect on bread volume. The bread with addition of apple fibre was the darkest colour, while the bread with addition of wheat fibre was the lightest one. A sample with 9 % of psyllium and wheat fibre was the softest one. A control sample had the highest nutritive value and the bread with 9 % of psyllium and wheat fibre had the lowest one.
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