Added chemicals Average population (n=3), CFU/carrier Exposure condition (kGy) 2 5 Not added (Control) 1.54×105 2.41×102 CaCO3 1.45×105 2.53×102 0.2% Calcium lactate 1.72×105 3.09×102 0.5% Soluble starch 1.46×105 2.51×102 0.15% Activated charcoal 1.42×105 2.63×102 L-alanine at 100 μg/ml 1.78×105 3.12×102 D-alanine at 100 μg/ml 1.80×105 2.93×102 0.1% Panvitan powder 1.52×105 2.33×102 0.1% Amino acids mixture 1.80×105 2.82×102 0.5% Sodium pyruvate 1.48×105 2.34×102 0.5% Glucose 1.72×105 2.98×102 Initial population was 1.4×106 CFU/carrier

Table 10: Recovery effect of several sorts of chemicals on SCDA culture medium from N company by using B. megaterium spore.