Lung inflammation and lack of genotoxicity in the comet and micronucleus assays of industrial multiwalled carbon nanotubes Graphistrength © C100 after a 90-day nose-only inhalation exposure of rats

Table 7 Lung weights of male and female rats 24 h and 90 days after a 90-day exposure to Graphistrength^© C100

Mean ± sd	0 mg/m³	0.05 mg/m³	0.25 mg/m³	5.0 mg/m³
MALE
24 h post exposure
Absolute weight (g)	1.50 ± 0.06	1.48 ± 0.14	1.63 ± 0.13	2.21 ± 0.29**
% body weight	0.38 ± 0.03	0.39 ± 0.02	0.41 ± 0.02	0.57 ± 0.05**
90 days post exposure
Absolute weight (g)	1.49 ± 0.08	1.58 ± 0.16	1.56 ± 0.07	2.42 ± 0.30**
% body weight	0.30 ± 0.02	0.32 ± 0.02	0.31 ± 0.03	0.46 ± 0.05**
FEMALE
24 h post exposure
Absolute weight (g)	1.19 ± 0.10	1.05 ± 0.07*	1.26 ± 0.09	1.73 ± 0.18**
% body weight	0.48 ± 0.04	0.46 ± 0.03	0.51 ± 0.04	0.72 ± 0.04**
90 days post exposure
Absolute weight (g)	1.18 ± 0.14	1.20 ± 0.09	1.27 ± 0.14	1.73 ± 0.12**
% body weight	0.38 ± 0.04	0.42 ± 0.03	0.44 ± 0.05**	0.64 ± 0.06**