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. Author manuscript; available in PMC: 2007 Apr 5.
Published in final edited form as: Radiat Res. 2006 Jul;166(1 Pt 1):1–8. doi: 10.1667/RR3585.1

TABLE 1.

Parameters Gbase(fr), Gsugar(fr), kbase and ksugar Obtained by Fitting to the Two-Component Model, the Dose–Response Curve for pUC18 Plasmid Film Samples at Various Γ (mol water/mol nucleotide)a

pUC18 plasmids Gbase(fr) (μ mol/J) Gsugar(fr) (μ mol/J) kbase (kGy −1) ksugar (kGy−1) G(∑fr) (μmol/J) Gbase(fr)/G(∑ fr) G(∑fr)/Ginitial(fr)
at Γ ~2.5 0.253 (0.008) 0.032 (0.0004) 0.033 (0.001) 0.0004 (0.00003) 0.285 (0.006) 0.89 (0.047) 0.24 (0.01)
at Γ ~11.5 0.416 (0.008) 0.053 (0.0004) 0.034 (0.001) 0.0006 (0.00003) 0.469 (0.008) 0.89 (0.032) 0.40 (0.01)
at Γ ~22.5 0.560 (0.008) 0.061 (0.0004) 0.046 (0.001) 0.0007 (0.00003) 0.621 (0.01) 0.90 (0.019) 0.53 (0.01)
a

The standard error for each parameter as reported by the nonlinear least-squares fitting procedure is included in parentheses. From previous work (36), the relative error in G(∑fr) is seen to vary from ±5% to ±15%. It is assumed that in the absence of geminate ion recombination and cross combination reactions, the initial yield of radicals is Ginitial(fr) ~ 1.18 μmol/J (56).