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. 2007 Mar 20;5(4):e92. doi: 10.1371/journal.pbio.0050092

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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(H₂O)_n + γ-IR, radiolysis of water exposed to ionizing radiation [15]: H₂O→ HO^• + H⁺ + e⁻ (IR-induced solvated electron); Primary radiolytic reaction [15]: 2 HO^•→ H₂O₂; IR-induced superoxide [15]: O₂ + e⁻ → O₂ ^•−; Fenton reaction [15]: Fe(II) + H₂O₂ → Fe(III) + HO^• + OH⁻ (hydroxide ion); Haber-Weiss reaction [15]: Fe(III) + HO₂ ^• → Fe(II) + O₂ + H⁺ and 2 Fe(III) + H₂O₂ → 2 Fe(II) + O₂ + 2 H⁺; Mn oxidation [13]: Mn(II) + O₂ ^•− + 2 H⁺→ Mn(III) + H₂O₂; Mn reduction [13]: 2 Mn(III) + H₂O₂ → 2 Mn(II) + O₂ + 2 H⁺. Under IR, Fe(II,III) redox cycling is predicted to generate HO^• and O₂ ^•−, whereas Mn(II,III) redox cycling is predicted to favor O₂ ^•− scavenging without HO^• production.