WOUSE 30 DAY SURVIVAL AFTER IC Gy 250 tep XRAY SVEN 'h 25 Ge FRACTIONS AT VARIOUS NTERVALS O0— |a ’ / : 37901 112480) \14/210) | _ —_ = - SON ae, tpga Be carrermi ee o . 2 => 4 a 12/130) i11/30) | i iti ot ‘se! 11/80) 4 i 1 8 12 i K _t + AaED i \ 20 24 (MTERWAL {fours} Figure 14. The percentage of wice surviving 30 days after exposure to 1000 rad_ to 24 hour intervals to RECOVERY OF CFU-S AFTER IRRADIATION th oo 1000 4 —_! a 4 2 NORMAL MICE 100 L : * 4000 r ia 7 + 250r x4 q 24h wo ¢ NORMAL MICE 1| 7 100r a 200r &300r | 4 | 1 | 1 2 i iL aL _t 4 4 6 8 Id 2 TIME AFTER iRRADIATION (DAYS) 14 ’ 3 The sequential changes in the 10-day CFU-S in control hon-irradiated mice, mice exposed to 100,200,300 or 1000 rad in 4 single dose and mice exposed to 100M rad given in increments of 2 3 rad at 24-hour intervals, -1l21- He xray ~ FaEe Netter tre Ene ee given in increments of 250 rad at 1 illustrate repair of lethal injury.