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Impact of space-relevant radiation (SR) on blood oxygenation. Arterial blood oxygen saturation was measured in 26-mo-old mice, at 23.5 mo (730 days) postexposure to gamma (1, 2, 3 Gy), proton (1, 2, 3 Gy), 56Fe (0.1, 0.2, 0.4, 1 Gy), and 28Si (0.1, 0.2, 0.4, 1 Gy) radiation via a mouse-adapted pulse oximeter. Mean ± SE; median of N = 10/group. ANOVA *P < 0.05 vs. control (CTL) (Dunnett's multiple-comparison tests).
