This diploma thesis deals with the optimization of jelly candies production, application of herbal extract to produced candies, and subsequent characterization of produced samples in terms of volatile (aromatic) substances, total phenolic substances, antioxidant aktivity, and sensory quality. Optimization parameters – the amount of gelatin and the addition of citric acid, were selected based on the sensory analysis. Additions of 7,5 % gelatin and 2 % acid were proven to be optimal. The sources for the production of herbal extracts were the plants Aronia melanocarpa and Echinacea purpurea, which are known for their high content of bioactive substances. The further sensory analysis determined the optimal amount of extract added to jelly candies samples – in the case of chokeberry it was 4 % and in the case of echinacea it was 1 % of the extract. In the sample with chokeberry extract of optimal composition, ie 7,5 % gelatin, 2 % citric acid, and 4 % extract, 46 volatile substances were determined, of which nonanal (12,17 %) and thymol (8,70 %) were the most represented, the total polyphenol content was 472.88 ± 8.02 gGAEg-1 of the sample and the antioxidant activity was determined to be 828.99 ± 17.74 gTEACg-1 of the sample. The sample with echinacea extract of optimal composition, ie 7,5 % gelatin, 2 % citric acid and, 1 % extract, contained 56 volatile substances, the most represented being nonanal (12,08 %), thymol (6,19 %), and decanal (5,52 %). The total polyphenols in this sample were determined to be 291.09 ± 10.17 gGAEg-1 of the sample and its antioxidant activity was determined to be 850.91 ± 30.29 gTEACg-1 of the sample. Samples with the addition of chokeberry extract, which gave the confectionery a fruity, slightly sour taste and a pink to dark purple color, were considered more pleasant/acceptable; samples with echinacea had an herbal aroma and taste and orange color.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:449759 |
| Date | January 2021 |
| Creators | Rychetský, Matěj |
| Contributors | Saláková, Alena, Vítová, Eva |
| Publisher | Vysoké učení technické v Brně. Fakulta chemická |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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