Assertion: cristobalite | /r/HasAspect | characteristic
Facets:
Source sentences:
text: The above results support the idea that quartz and cristobalite in the fine (respirable) fraction of aerosols have the characteristics of physically accumulating substances: (1) they are infinitely persistent; (2) they are accumulated via inhalation in the lung tissues and not just deposited in the airways of organisms; (3) they may not be easily excreted resulting in an accumulation in organisms over time and in long biological half-lives; (4) tissue concentrations increase with increasing exposure in air; and (5) higher levels in tissues lead eventually to toxic effects in a dose-dependent manner.