Table 1.

Stimuli presented during electroscutumography (ESG) experiments. Butyric acid (BTA) stimulus was first applied to the stimulus cartridge, followed by the application of the VOC at a given concentration.

Treatment	Concentration BTA	Concentration VOC †
control	0 *	0 *
0	100 μg/μL	0 *
100	100 μg/μL	100 μg/μL
500	100 μg/μL	500 μg/μL
1000	100 μg/μL	1000 μg/μL

* hexane; ^† PEA, geraniol, β-citronellol, or citral.