Electron beam irradiation improves the nutritional profile of dried and sliced wild Boletus edulis Bull
Conference Paper
Overview
Overview
abstract
Boletus edulis Bull. is a seasonal mushroom with high perishability (shelf-life: 1-3 days at room
temperature) [1]. Drying is a widely used postharvest technology, which overcomes those
problems. Nevertheless, after slicing, mushrooms need special care to keep their quality [2]. A
possible treatment is applying ionizing radiation.
Herein, the effects of electron beam irradiation (2, 6 and 10 kGy) on nutritional parameters were
analyzed in wild B. edulis dried and sliced samples (Bragança, Northeast of Portugal, 2013).
Irradiation was performed at Gamma Pak Sterilizasyon – Turkey. The nutritional parameters
were determined throughout the storage time (0, 6 and 12 months) according to official
procedures. The results were compared considering the mean value of each storage time (ST),
including all electron beam irradiation (EB) doses, and also the mean value of each dose, with
all ST included, allowing verifying the effect of each factor independently. Despite the detected
significance in the interaction among ST and EB for all assayed factors, some defined
conclusions were obtained: fat, protein and ash contents gave maximal contents in samples
irradiated with 10 kGy, while the lowest values were detected in non-irradiated samples.
Regarding the effect of ST, these same parameters presented minimal values in samples stored
during 12 months. The variation in carbohydrates, which was calculated by difference, was
precisely the opposite of the previously described. The variation in energy was less pronounced
for both effects. Overall, irradiation treatment, particularly the 10 kGy dose, tended to improve
the nutritional profile of sliced-dried B. edulis samples.
