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Use of citrus fruits in the food industry
Havlíková, Michaela ; Hudečková, Helena (referee) ; Mikulíková, Renata (advisor)
The main objective of the thesis was to prepare marmalades, jellies, and dried slices of citrus fruits. Three types of citrus fruits: orange, grapefruit, and pomelo, were chosen for this thesis. The nutritional characteristics of the prepared products were determined including volatile matter content, dry matter content, pigment content, lipophilic content, and vitamin C content. The aforementioned products were also subjected to sensory analysis to assess their taste, aroma, texture, colour, and overall acceptability. The theoretical part describes the legislation dealing with citrus processing, marmalades, dried fruit and jelly confectionery. Further, the characteristics of the aforementioned food products and the characteristics of citrus fruits are also given. The theoretical part also deals with the theory of the methods used, i.e. sensory analysis, gas chromatography with mass spectrometry, and high-performance liquid chromatography. The experimental part describes the preparation of samples and the performance of individual determinations. In the sensory analysis, marmalades, jellies, and dried sheets were evaluated separately. The evaluators assessed their acceptability depending on the citrus used. The volatile substances were also determined by gas chromatography-mass spectrometry. The moisture and dry matter of the products were determined by drying and the pigments and lipophilic substances contained in the products were determined by high-performance liquid chromatography.
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Využití některých méňě pěstovaných ovocných druhů pro zpracování
Střihavková, Dana
The bachelor essay on "The use of less cultivated fruit species for processing" topic focuses on the processing three non?-traditional fruit species such as hawthorn, medlar and quince. A total of 11 products, produced from these fruit species, were evaluated by anonymous sensory evaluation by 15 respondents. The gustation was based on criteria such as taste, smell, appearance, consistency and overall impression. The best products were the hawthorn products, then the quince, and at least the medlar products. Less usual fruit species can undoubtedly be an interesting diversification of our diet, and due to the significant part of nutritionally valuable substances, they can enrich the assortment of products from commonly grown fruit species.
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Sekundární produkty révy vinné a vína
Cenková, Lenka
This Diploma thesis first deals with composition of the bunch of grapes and must. The following is a description of the selected consumable secondary products such as must, dealcoholized vine, jam, marmalade, jelly from must, vine jelly, grape seed oil, flour from grape seeds. Further describes other secondary products such as pomace (marcs) and vineyeard prunings and their usage and mentioned is also a significant waste resulting from the grape vine cultivation and vine production and its possible utilisation. In the practical part of the thesis there is performed the procedure of the production (conservation) of grape vine must and production of jelly from must from cultivars "Veltlínské zelené" and "Dornfelder". These 2 samples of jellies were then together with other 6 samples of similar products (5 of them vine products from other vineries, 1 product from different fruit - cherries) organoleptically evaluated and analytically measured in the laboratory. The results are processed into tables, charts, and statistically and verbally commented.
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