The irradiation process was accomplished by a Cobalt-60 irradiator, multipurpose commercial compact, located at the Institute of Nuclear Energy Research (IPEN), in the city of São Paulo, Brazil. A dose rate of 12 kGy·h−1 in static mode was used. Samples were packed side by side in coolers to minimize changes in temperature, during the process dosimeters were fixed in the front and back of the coolers. To ensure uniformity of irradiation, an inversion of 0°–180° was carried out. The treatments were zero (control), 1.5 and 3.0 kGy. These low doses were chosen in an attempt to eliminate/decrease microbial proliferation and cause less impact on the physicochemical characteristics and sensory acceptance as a goal at that moment.