Abstract

Invertase activity of irradiated and non-irradiated Mazafaty dates during four months storage time has been studied. There are large differences in invertase activity in different dates cultivars. The soft and good quality dates usually have higher activity compared to dry or semi-dry varieties. Irradiated dates with doses 1–5 kGy, which could be used for decontamination and disinfestations of dates with a dose rate of 1.87 Gy/s were used. The samples were stored in two temperatures of 5°C and 25°C for four months. The activity of invertase enzyme was analysed at different time intervals. Inactivation study of invertase (B-fructo furanosidase) activity showed that the invertase is sensitive to temperature, storage time and also inactivation of enzyme occurred in dose range of 10–50 kGy.

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