; - UNCLASSIFIED TABLE 4 Distribution of La!#° in the Tissues of Mice Following Inhalation and Gavage of a Dry Particle Aerosol Containing La!“°Cl, Tissue G.I, Tract and Contents 99) §.8 Skeleton 0.65 Resp, Tract and Lungs Liver (a) (6) ihr 1@) Head Time After Inhalation Exposure or Gavage br 24 hr Ga) I 100) I 87 - 58 3d G I 0.28 3.8 G 0.02 1.8 0.89 - 0.34 - 0.011 0.30 - - - 1.34 0.00001 0.71 0.58 - 0.44 - 0.13 0:004 - 0.10 0.003 0.12 0.004 I= Inhalation of La140C13 adsorbed on dry particles. G = Gavage administration of above particles. Activity of gastro-intestinal tract and contents is expressed as 100. All other values are expressed in percent of this activity. -12- B&B £E fk fF £ td FE 2b ek EE F eA ER hs EEE Ra UNCLASSIFIED