All findings were interpreted as adaptive and non-adverse. Therefore, no adverse effects were observed in any of the endpoints, including the group exposed to the highest concentration. Under the conditions of this study, a NOAEC (no observed adverse effect concentration) of 24 mg/m3 was determined. Diniobium pentaoxide is thus considered a newly discovered nuisance dust.
Bruer et al. (Tue,) studied this question.