Record Display for the EPA National Library Catalog


Main Title Pathologic Changes Induced by Coal-Fired Fly Ash in Hamster Tracheal Grafts.
Author Schiff, L. J. ; Graham, J. A. ;
CORP Author IIT Research Inst., Chicago, IL. Life Sciences Research Div.;Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA-R-807354; EPA/600/J-84/381;
Stock Number PB87-115648
Additional Subjects Fly ash ; Toxicology ; Respiratory system ; Hamsters ; Laboratory animals ; Power plants ; Reprints ; Air pollution effects(Animals)
Library Call Number Additional Info Location Last
NTIS  PB87-115648 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
The toxicity of fly ash from a coal-fired power plant for respiratory tract epithelium was studied in heterotropic tracheal grafts. Hamster tracheal grafts were continuously exposed to beeswax-cholesterol pellets containing 100, 1000 and 5000 micrograms fly ash and evaluated at 1, 2, 4 and 14-15 months of exposure. Histopathologic effects and the autoradiographic pattern of (3H)thymidine incorporation were determined. In all concentrations of fly ash, an early mild submucosal inflammatory response was seen. Morphologic response of the tracheal epithelium was characterized by hyperplasia followed by squamous metaplasia and atrophic lesions. Although a rare papillomatous structure with cellular atypia was seen in grafts receiving 1000 micrograms fly ash, no carcinomas appeared during the 15 month observation period. Varying degrees of submucosal toxicity were also observed during the time period. Autoradiographic studies showed a significant increase in (3H)thymidine incorporation in grafts receiving fly ash treatment.