Investigation of radical locations in various sesame seeds by CW EPR and 9-GHz EPR imaging.
Free Radic Res
; 49(1): 1-6, 2015 Jan.
Article
in En
| MEDLINE
| ID: mdl-25241851
ABSTRACT
We investigated the location of radical in various sesame seeds using continuous-wave (CW) electron paramagnetic resonance (EPR) and 9-GHz EPR imaging. CW EPR detected persistent radicals (single line) for various sesame seeds. The EPR linewidth of black sesame seeds was narrower than that of the irradiated white sesame seeds. A very small signal was detected for the white sesame seeds. Two-dimensional (2D) imaging using a 9-GHz EPR imager showed that radical locations vary for various sesame seeds. The paramagnetic species in black sesame seeds were located on the seed coat (skin) and in the hilum region. The signal with the highest intensity was obtained from the hilum part. A very low-intensity image was observed for the white sesame seeds. In addition, the 2D imaging of the irradiated white sesame seeds showed that free radicals were located throughout the entire seed. For the first time, CW EPR and 9-GHz EPR imaging showed the exact location of radical species in various sesame seeds.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sesamum
/
Free Radicals
Language:
En
Journal:
Free Radic Res
Year:
2015
Document type:
Article