Figure 9.

Survival rates and body weight changes in spontaneously cancer‐developing rasH2 mice. a) Mouse survival rates. All mice in the CNT group are alive at week 26. In the carbon black group, 1 animal died at week 22, and 9 of the 10 animals survived at week 26. In the solvent‐only group, all mice are alive at week 26. In the N‐methyl‐N‐nitrosourea (MNU) group, 1 animal died at weeks 13, 14, 17, and 22, and 6 of the 10 animals are alive at week 26. b) Changes in animal body weight. Body weight changes are similar among the CNT group, carbon black group, and solvent‐only group. Body weight began to decrease with time from week 12 in the MNU group. Adapted with permission.^{[ 128 ]}