Abstract
The effect of 4 kGy ionisation irradiation, combined with ripening temperatures at 8°C and 16°C on the ripening of Cheddar cheese was investigated. Changes in cheeses were monitored by sensory, microbiological, and chemical analyses. Sensorically, no cheese was preferred above the other. At 16°C ripening, irradiation affected the bacterial groups, but not the psychrotrophs. The free fatty acid content of the cheeses was not affected by irradiation, but higher thiobarbituric acid-values were observed after ripening at 16°C, as well as higher water-soluble nitrogen/total nitrogen. Differences in proteolysis products were detected by urea-page and RP-HPLC.
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