The Effects of Water and a Protective Agent on Gamma-ray Induced Free Radicals in Mustard Seeds

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Abstract
Electron-spin-resonance experiments on irradiated seeds have shown that the radicals induced by gamma-radiation are very sensitive to the moisture content of the seeds. However, a x-band frequencies the dielectric effect of the water in the sample has limited such experiments to moisture-contents of about 12 per cent. By using an E.S.R. spectrometer of low microwave frequency the gamma-induced radicals in white-mustard seeds have been studied with moisture-contents of up to 70% by weight, and measurements made while gamma-irradiated was in progress. Both radical production and radical decay are studied in seed samples of various moisture-contents and in seeds treated with the protective agent AET.

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