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. Author manuscript; available in PMC: 2007 Apr 5.
Published in final edited form as: J Phys Chem B. 2005 Sep 8;109(35):16967–16973. doi: 10.1021/jp0518409

Figure 5.

Figure 5

Corrected dose-response curve for free radical trapping by pUC18 plasmid film hydrated to Γ = 22 mol of water/nucleotide, fit to the two component model given in eq 1. X-irradiation and EPR were done at 4 K. R2 is the goodness of fit, and χ2 is the reduced χ2-value calculated by the nonlinear least-squares fitting routine used by ORIGIN. Inset: G(∑fr) = 0.62 ± 0.001 μmol/J was calculated from a fit to the initial linear response.