The results of the contamination check for the presence of gamma irradiation residues in all gamma irradiation-treated samples showed that there was no contamination of these samples over the entire study. The results matched those found in literature reports and demonstrated that gamma irradiation could be a safe and applicable technique (Caldwell & Spayd, 1989 and Eyck & Deseran, 2001).
Alcohol content did not show any change, so there were no effects on the alcohol content of rice wine by gamma irradiation (Table 1).