The smell component of flavor is composed of volatile compounds detected by receptors in the upper regions of the nose. (journals.lww.com)
Cats are just more sensitive to volatile compounds in general, and that includes essential oils. (dogsnaturallymagazine.com)
Different individuals release different volatile compounds — words — into the air, which combine into what scientists call a «signature» — the equivalent of a sentence. (discovermagazine.com)