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Hodnocení kvality bezlepkových potravin se zaměřením na pečivo
OSINKOVÁ, Radka
This dissertation addresses the issue of shelf life and low nutritional value of gluten-free bread. Its aim was to determine the effect of certain additives on increase of the nutritional value and on extension of the shelf life of gluten-free bread. The first section of the thesis is devoted to the theoretical part, offering a general overview of properties of gluten, diseases associated with disorders of gluten digestion and the issue of gluten-free bread. It concludes with a description of a method of sensory analysis and possibility of compiling a questionnaire. The second section of the thesis is focused on the practical part which is developed on the basis of performing a baking experiment using enriching additives - hemp flour and mash. The bread samples are subjected to texture analysis by means of a texture analyser. The experimental part includes a questionnaire survey. The achieved results are processed and graphically represented. On the grounds of the acquired results, it is possible to label the chosen additives - hemp flour and mash as enriching ingredients positively affecting the nutritional value and shelf life of gluten-free bread. The results of the questionnaire survey show that the respondents are interested in the quality of the bakery products consumed; this is especially true for coeliac sufferers and people with other disorders of gluten digestion.
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Hodnocení bezlepkového chleba s přídavkem vlákniny
Pernicová, Helena
The aim of the thesis “Evaluation of gluten-free bread with added fiber” was to devise recipes for the preparation of gluten free bread. At the building of the Department of Food Technology at Mendel University in Brno 10 samples of bread with 3 %, 6 % and 9 % of added apple fiber, flaxseed fiber and poppy seed fiber were made. The bakery experiment was evaluated, the strength using TIRA-test was determined 24 h and 48 h after baking and the sensory analysis was performed, while evaluating the sensory panel of celiacs and those without dietary restriction. The most acceptable was the gluten-free bread sample with the addition of 3 % of flaxseed fiber. A statistically significant difference was found among the assessment of the groups of evaluators with and without celiac disease in the parameters of the crumb porosity, the color of the crust and the overall impression of gluten-free bread.
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Quality assessment of gluten-free foods with a focus on pastries
ZIMMELOVÁ, Helena
The topic of this thesis is the production of gluten-free bread from naturally gluten-free flour, which will be enriched with suitable additives that will increase antioxidant activity and naturally effect on the structure of the pastry, so it will meet the sensory requirements of final consumers. The literary part define, which proteins can be found in cereals, what does the gluten means, its function in the pastry and which diseases can cause. In connection with these diseases, a gluten-free diet for improving the patient's health and suitable foodstuff are briefly described. The literary part is concluded with the theory of sensory evaluation. The practical part deals with the production of naturally gluten-free breads enriched with ingredients from kitchen onions (Allium cepa L.) and subsequent sensory evaluation of this bread. Selected statistical procedures were used to obtain, processed and evaluated data. Antioxidant activity was also monitored and evaluated. By using texture-meter was find out, what effect has additives on aging of gluten-free bread.
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Směsí pro výrobu bezlepkového chleba s přídavkem vlákniny
Suráková, Lenka
The aim of the thesis was to suggest mixtures for making of gluten-free bread with the addition fiber. Within the baker's experiment 18 recipes were suggested. Rolls were baked with two types of hydroxypropylmethylcellulose (HPMC) containing wheat fiber WF 200 and WF 600 and oat fiber HF 600 in an amount of 2 %, 5 % and 7 %. Quality assessment rolls included sensory evaluation, hardness measurements using TIRA TEST, measurement volume rolls, baking and calculate the loss ratio numbers. The results of the evaluation were statistically and graphically presented. The most suitable recipe was evaluated the recipe with a sample of 2 % wheat fibers with a fiber length of 600 micron using HPMC type E and sample was 7 % wheat fibers having a fiber length of 200 micron using HPMC type K. These samples were demonstrably evaluated as the best sensory evaluation (p < 0,05).
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Quality evaluation of gluten-free food, concretely gluten-free pastries
MARKO, Tomáš
This diploma thesis deals with theme "Quality evaluation of gluten-free food, concretely gluten-free pastries". Theoretical part is concerned about coeliac disease in general, their symptoms, forms and diagnostic. There is described basic principal of coeliac disease and approachable gluten-free food. Then the basics of sensory analyse are described. Practical part is focused on finding suitable gluten-free flour and baking samples of bread based on recipe with care about improving nutritional value. Baked bread samples, made from commixture of gluten-free flour with enrichment of different amount of flaxseed, were evaluated with suitable methods of sensory analysis. This analyse shows which sample is the most preferred and based on those information it is proposed to enlarge offer in gluten-free pastry.
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