Assertion: toluene's metabolite | /r/AtLocation | low levels
Facets:
value: in rat urine
type: LOCATION
value: very
type: DEGREE
Source sentences:
text: Phenolic metabolites ( o ‐cresol and p ‐cresol) were first found at very low levels (0.04–0.11 % and 0.4–1 % ) in rat urine (Bakke and Scheline 1970 ) and later in human urine as well ( o ‐cresol up to 0.2 % )