4. Conclusions
The result of this study indicate that gamma irradiation at
10 kGy could sterilize freeze-dried miyeokguk without deterioration
of the sensory quality of the food. In addition, gamma
irradiation at 10 kGy was sufficient to fulfill microbiological
requirements as space food. Following this study, the microbiological
and sensory qualities of freeze-dried and irradiated miyeokguk
was further tested during a 51-day space environment
simulation by IBMP. Freeze-dried miyeokguk was certified by IBMP
as space food usable in the Russian segment of the International
Space Station in 2010 (Fig. 2).