Abstract
Tightly bottled samples of grape juice pressed out of cv ‘Merlot’ were irradiated at an industrial plant with 0, 500, 1000 and 2500 krad. The samples were stored at room temperature and analyzed after eight months. Irradiation, even at the higher doses was unable to eradicate completely the yeast population and some fermentation took place. Surprisingly after such long lag of time, fermentation was not equal in all the treatments, but the amount of alcohol appeared to be inversely propotional to the dose. Sugars followed, though less markedly, a complementary trend: they were more abundant in the samples irradiated with higher doses. Furthermore a peculiar taste of honey developed into the juice with irradiation and was more marked at higher doses.
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