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- Title
EPR characterization of the gamma irradiation effect on antiradical activity and free radicals generation of dried rosehip (Rosa canina L.) seeds.
- Authors
Mladenova, Ralitsa B.; Aleksieva, Katerina; Taneva, Sabina; Sabotinov, Ognian; Teneva, Desislava
- Abstract
Rosehip seeds (RS) are rich in important dietary antioxidants such as polyphenolic substances, vitamins and carotenoids. In the present study dried RS samples were exposed to gamma-irradiation at doses of 10 and 25 kGy. Free radicals, induced in seeds by ionizing rays and their time stability were investigated. Electron Paramagnetic Resonance (EPR) study revealed that carbon-centered radicals from the cellulose are generated in the samples irradiated by both doses, in addition spectrum, attributed to starch free radicals was observed at 25 kGy irradiated seeds. The EPR signals were reduced significantly for 120 days after treatment. The effect of irradiation on antiradical activity of rosehip defatted seed extracts was evaluated using the stable free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH). The results show that free radical scavenging activity increased in irradiated rosehip seeds samples with approximately 19% compared to that of untreated seeds. For evaluation of antiradical activity of the sample extracts before and after irradiation the IC50 as well as Trolox Equivalent Antioxidant Capacity (TEAC) value were calculated.
- Subjects
FREE radicals; ELECTRON paramagnetic resonance; IRRADIATION; CAROTENOIDS; SEEDS; RADICALS (Chemistry); OXIDANT status
- Publication
Journal of Food Measurement & Characterization, 2024, Vol 18, Issue 1, p529
- ISSN
2193-4126
- Publication type
Article
- DOI
10.1007/s11694-023-02196-w