controlled air content crystalline silica controlled air crystalline silica content 2023-11-09T10:36:46Z CHEBI:30563 CHEBI:46727 MESH:D011791 MESH:D012822 This is any condition in which the main influencing factor is respirable crystalline silica, which is breathable silica dust. The level of crystalline silica in the air surrounding an organism or breathed by an organism is determined by environmental conditions, work conditions, or controlled as part of an experiment. XCO:0001099 air crystalline silica content controlled air FSD content controlled air fracking sand dust content controlled air fracking sand particle content experimental_condition_ontology respirable crystalline silica content slaulederkind