This diploma thesis evaluates the ability of a monoterpene S-carvone (main component of caraway oil) to inhibit the sprouting of stored potatoes intended for further processing into a food products. Then it evaluates the influence of carvone's special treatment on selected qualitative parameters of potato chips.
For this experiment, two concentrations of carvone were selected (8 and 32 microliters per liter), applied altogether 4-times on stored potatoes within 3-week intervals. For this application a modified chromatograph was used to ensure a uniform dispersion of the compound. Special treatment was being done for a period of 10 minutes, while each variant of this treatment had 3 repetitions. After each treatment the inhibition effect of carvone on the growth of sprouts was evaluated. Also, there was an evaluation of the content of reducing sugars using the Luff-Schoorl method. Potato chips were repeatedly produced from the treated potatoes. Instrumental measuring of the texture of these potato chips was done on a testing device Instron. Potato chips were also a subject to a sensory evaluation to find out the degree of influence on organoleptic properties.
On the basis of the results, the inhibition effect had been confirmed only in the treatment by carvone with a concentration 32 microliters per liter. The variant of treatment by 8 microliters per liter provided the same results as the control variant. Content of reducing sugars in a tuber had not been influenced by a treatment by S-carvone. During the instrumental measuring of textural properties, a significant difference between control and variants treatment by carvone had been confirmed only after the second and fourth treatment. These chips had shown higher maximal strength needed for crunching of potato chip in comparison with the control. On the basis of the sensory profile of potato chips, no organoleptic properties had been influenced even after the fourth treatment with carvone of stored potatoes. Essential oils and its active substances represent a suitable substitution for used synthetic substances, because there had been recognized no negative effect of carvone on the qualitative parameters.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:257640 |
| Date | January 2016 |
| Creators | Gildainová, Dana |
| Contributors | Klouček, Pavel, Fraňková, Adéla |
| Publisher | Česká zemědělská univerzita v Praze |
| 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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