Antioxidants/therapeutic use; Gene Expression/drug effects; Hypoxia/genetics; Lung Injury/genetics; Metalloporphyrins/therapeutic use; Radiation Injuries/genetics; Radiation-Protective Agents/therapeutic use; Animals; Antioxidants/pharmacology; Drug Administration Schedule; Female; Gene Expression/radiation effects; Gene Expression Profiling; Genes, Regulator; Hypoxia/drug therapy; Hypoxia/metabolism; Hypoxia/prevention & control; Lung/drug effects; Lung/metabolism; Lung/radiation effects; Lung Injury/drug therapy; Lung Injury/metabolism; Lung Injury/prevention & control; Metalloporphyrins/pharmacology; Mice; Mice, Inbred C57BL; Oligonucleotide Array Sequence Analysis; Oxidation-Reduction; Oxidative Stress/drug effects; Radiation Injuries/drug therapy; Radiation Injuries/metabolism; Radiation Injuries/prevention & control; Radiation-Protective Agents/pharmacology; Signal Transduction; Time Factors