A system for the long‐term continuous exposure of laboratory animals to mixtures of air pollutants1

摘要: Abstract A facility has been developed for the continuous chronic exposure of large numbers animals to various levels air pollution mixtures. It consists four environmental rooms which are self‐contained, each constituting a chamber. The suitable housing almost any species laboratory animals. main handler conditions and cleans outside is distributed hallway. Air flow, temperature humidity precisely controlled independently in room. Actual involves trace substances impractical reproduce entirely. For present, mixture being used, consisting submicron sulfate aerosol major gaseous pollutants proportions similar those urban atmospheres. introduced into three at pre‐determined levels; low (typical average pollution), high (alert or episodic levels) exaggerated (or emergency levels...