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Gamma-irradiation as a method of microbiological control, and its impact on the oxidative labile lipid component of Cannabis sativa and Helianthus annus

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Abstract

The effect of irradiation (0–20 kGy) on hemp and sunflower seeds was assessed, with specific reference to the oxidatively labile lipid component (unsaturated fatty acids and tocochromanols). Total protein, lipid, and solids content of the seeds did not vary with irradiation dose. Lipid hydroperoxide concentration increased significantly in the sunflower seeds (48 mmol kg−1 lipid) and a significant increase in volatile secondary oxidation products was measured in both seeds (e.g. hexanal, heptanal, 1-penten-3-ol) with increasing irradiation dose. Irradiation at 5 kGy sterilised the seeds of all microbial contamination and irradiation doses of 20 kGy prevented germination. A loss of the antioxidant tocopherol was shown with increasing irradiation doses, although this was selective for specific tocopherol isoforms (α-tocopherol, β-tocopherol and γ-tocopherol).

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Authors and Affiliations

  1. Division of Food Sciences, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Nr. Loughborough, Leicestershire, LE12 5RD, UK

    Ian D. Fisk, Konstantinos Gkatzionis, Mita Lad, Christine E. R. Dodd & David A. Gray

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  1. Ian D. Fisk
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  2. Konstantinos Gkatzionis
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  3. Mita Lad
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  4. Christine E. R. Dodd
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  5. David A. Gray
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Correspondence to David A. Gray.

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Fisk, I.D., Gkatzionis, K., Lad, M. et al. Gamma-irradiation as a method of microbiological control, and its impact on the oxidative labile lipid component of Cannabis sativa and Helianthus annus . Eur Food Res Technol 228, 613–621 (2009). https://doi.org/10.1007/s00217-008-0970-3

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  • DOI: https://doi.org/10.1007/s00217-008-0970-3

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