Assertion: acetaldehyde | /r/HasSubevent | significant growth retardation
Facets:
Source sentences:
text: Intermittent exposure to concentrations up to 3000 ppm (six-hour time-weighted average = 1050 mg/m3) acetaldehyde for 1.5 hours, in addition to the initial exposure to 500 ppm (900 mg/m3) acetaldehyde for six hours per day, resulted in significant growth retardation, slight irritation and a further reduction of the phagocytic index, while there was no change in the severity of the histopathological changes observed in the nasal epithelium, compared with rats exposed only to 500 ppm (900 mg/m3) acetaldehyde for six hours per day