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Survival curves: N/N0 ratio as a function of absorbed γ-ray dose (Gy) of E. coli bacteria (AB1157) in aqueous solution saturated with N2O (pH ~7.4) in the presence of: A: buffer; B: 2.72×10−4 mol/l HBC; C: 1×10−4 mol/l PRG + 2.72×10−4 mol/l HBC; and D: 1×10−4 mol/l PRG + 1×10−4 mol/l 17βE2 + 6.7×10−4 mol/l HBC.
Inset: ΔD37 values (Gy), calculated from the corresponding survival curves.
