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Master's Thesis
Author of thesis: Bc. Radka Dohnalová
Acad. year: 2025/2026
Supervisor: prof. RNDr. Ivana Márová, CSc.
Reviewer: prof. Ing. Adriána Kovalčík, Ph.D.
This diploma thesis focuses on the development of novel gluten-free cereal products enriched with probiotic and postbiotic components, with the aim of creating functional foods with potential health benefits for consumers. The theoretical part of the thesis summarizes the issues surrounding gluten-free cereals and the possibilities for their nutritional enrichment. It further focuses on the characterization of probiotics, prebiotics, and postbiotics, their interactions, and their importance for human health. Attention is also given to the use of microalgae and yeast as sources of bioactive compounds and their synergistic effects with lactic acid bacteria. In the experimental part, suitable cereal matrices and microbial biomass for the preparation of functional products were selected and characterized. Methods for determining basic nutritional and active components were optimized. The work included the cultivation of lactic acid bacteria of the genera Lactobacillus and Bifidobacterium on selected substrates and the evaluation of their growth and metabolic activity. It was found that the strain Lactobacillus plantarum exhibited higher cell viability in a buckwheat matrix, making it a suitable candidate to produce probiotic cereal products. In contrast, the Bifidobacterium bifidum strain proved to be more suitable for the preparation of postbiotic ingredients, particularly in combination with quinoa flakes, where higher lactic acid production and more pronounced changes in the lipid profile were observed. The addition of microalgae (Chlorella, Spirulina) and yeast of the genus Rhodotorula to the cereal base led to changes in the fatty acid profile. Based on the results obtained, model cereal products were prepared, and their safety and sensory properties were evaluated. The results show that by appropriately combining the cereal matrix, microbial biomass, and fermentation process, the nutritional and functional properties of the resulting products can be specifically influenced, creating foods with the potential for use as functional gluten-free products.
Pseudocereals, buckwheat, quinoa, microalgae, yeast, probiotics, lactic acid bacteria, prebiotics, genus Bifidobacterium, genus Lactobacillus, chlorella, spirulina, postbiotics, functional foods
Date of defence
01.06.2026
Result of the defence
Defended (thesis was successfully defended)
Grading
A
Process of defence
1. Studentka seznámila členy komise s náplní a cílem diplomové práce. 2. Byly přečteny posudky na diplomovou práci. 3. Studentka akceptovala všechny připomínky oponentky a na všechny otázky odpověděla v plné šíři. Diskuse: doc. Ing. Pavel Diviš, Ph.D. Vyskytuje se něco podobného již dnešní době na trhu? Na jaký typ spotřebitelů to cílí? Jak jsou tyto výrobky běžně balené? Bývá to prodáváno samostatně nebo je to součástí například jogurtů? Je možné to balit i do kapslí? doc. Ing. Eva Vítová, Ph.D. V jaké formě byly Vaše produkty? Jednalo se o kaši? Jak bylo provedeno senzorické hodnocení? Jakou to mělo konzistenci? Chutnala jste Vámi připraven výrobky? Studentka odpověděla na všechny doplňující otázky členů komise, které byly v průběhu diskuse k dané problematice vzneseny. V diskusi studentka prokázala výbornou orientaci v dané problematice. Po diskusi následovalo hodnocení závěrečné práce. Diplomantka prokázala nejen výborné odborné znalosti, ale i schopnost samostatné prezentace dosažených výsledků.
Language of thesis
Czech
Faculty
Fakulta chemická
Department
Institute of Food Science and Biotechnology
Study programme
Chemistry of Natural Products (NPCP_CHPL)
Composition of Committee
prof. RNDr. Ivana Márová, CSc. (předseda) prof. Ing. Stanislav Obruča, Ph.D. (místopředseda) doc. Ing. Pavel Diviš, Ph.D. (člen) prof. Ing. Adriána Kovalčík, Ph.D. (člen) doc. Ing. Eva Vítová, Ph.D. (člen) prof. RNDr. Iva Burešová, Ph.D. (člen)
Supervisor’s reportprof. RNDr. Ivana Márová, CSc.
Grade proposed by supervisor: A
Reviewer’s reportprof. Ing. Adriána Kovalčík, Ph.D.
Grade proposed by reviewer: A
Responsibility: Mgr. et Mgr. Hana Odstrčilová