Use of ESR for the detection of irradiated dates (Phoenix dactylifera L.).
One variety (Aple) of Libyan dry dates (Phoenix dactylifera L.) was irradiated in a 60Co source to absorbed doses of 0.8, 1.0, 1.5 and 2.0 kGy. Unirradiated date stone contains a radical with a single line g = 2.0045, feature A. Irradiation to a dose of 2.0 kGy (the recommended dose for fruits in U.K.) induces the formation of additional radicals with signals g = 1.9895 and 2.0159, feature C. The single line having g = 2.0045 decays in both unirradiated and irradiated samples whereas the additional signals g = 1.9895 and 2.0159 remain almost unchanged over a period of time 15 months stored at room temperature and 4 degrees C.
Ghelawi
M A
MA
University of Salford, U.K.
Moore
J S
JS
Dodd
N J
NJ
D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005514:Food Irradiation; D005609:Free Radicals / Q000032:analysis / Q000528:radiation effects; D005638:Fruit / Q000737:chemistry / Q000528:radiation effects*; D011874:Radiometry / Q000379:methods*; D012639:Seeds / Q000737:chemistry / Q000528:radiation effects; D013696:Temperature; D013997:Time Factors
D005609:Free Radicals