title: Shared retronasal identifications of vapor-phase 18-carbon fatty acids.
abstract: The long-chain 18-carbon fatty acids linoleic, oleic, and stearic acids, retronasally in vapor phase, are discriminated from blanks and each other. However, ability to linguistically identify them was unknown. To explore this, a Focus Group and then Check-All-That-Apply measures gave 9 identifiers for the 3 fatty acids plus phenylethyl alcohol (PEA) and geraniol. Next, participants selected 1 of the 9 identifiers from a computer-based display. It was found that the modal identification for linoleic acid was 23% "Rubbery" (next 18% "Oily" and "New Plastic"), oleic acid was 21% Oily (next 19% Rubbery), and stearic acid was 43% Rubbery (next 22% New Plastic), but linoleic acid received ~40% food-related identifiers. Geraniol was 96% "Lemon," and PEA was 67% "Flowers." Identifications for fatty acids differed significantly (P ≤ 0.05) from those for geraniol for most participants (86%) and from those for PEA for 59% of participants. Stearic acid identifications differed significantly from those for linoleic and oleic acids for 32% of participants. However, identification for linoleic acid differed significantly from those for oleic acid for only 14% of participants. Overall, retronasal vapor-phase stearic acid was identified differently from other 18-carbon fatty acids by a substantial minority of participants, but linoleic and oleic acids were not, suggesting that these 2 vapor-phase 18-carbon fatty acids can be identified retronasally as a group but not separately.
authors: Weill Cornell Medical College, College of Medicine, Doha, Qatar.
authors: Tariq
authors: T
authors: Chukir
authors: Richard B
authors: RB
authors: Darlington
authors: Bruce P
authors: BP
authors: Halpern
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D019787:Linoleic Acid / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009666:Nose / Q000502:physiology*; D019301:Oleic Acid / Q000378:metabolism*; D012903:Smell; D013229:Stearic Acids / Q000378:metabolism*; D014835:Volatilization; D055815:Young Adult
chemical_list: D013229:Stearic Acids; D019301:Oleic Acid; D019787:Linoleic Acid