Table 3.

Relationship between retro delay and odorant properties

Temporal parameter	VP (mmHg)	P(logKow)	Density	BP (°C)	Polar surface
Onset	Delay = 1.3VP + 94	Delay = −48.8P + 217	Delay = 130.5D − 7	Delay = −0.11BP + 123	Delay = 3.7PS + 38
	r2 = 0.03	r2 = 0.91	r2 = 0.06	r2 = 0.01	r2 = 0.65
	p = 0.37	p = 0.002	p = 0.32	p = 0.45	p = 0.03
t10	Delay = −1.88VP − 28	Delay = 22.2P − 97	Delay = 152D − 181	Delay = 0.52BP − 120	Delay = −0.60PS − 36
	r2 = 0.16	r2 = 0.44	r2 = 0.18	r2 = 0.25	r2 = 0.04
	p = 0.22	p = 0.08	p = 0.20	p = 0.15	p = 0.35
t50	Delay = 0.68VP − 12	Delay = 4.67P − 16	Delay = 89D − 84	Delay = 0.05BP + 13	Delay = 0.34PS − 12
	r2 = 0.06	r2 = 0.05	r2 = 0.17	r2 = 0.01	r2 = 0.04
	p = 0.32	p = 0.33	p = 0.21	p = 0.44	p = 0.36
t90	Delay = 3.69VP + 23	Delay = −22.6P + 112	Delay = −9.5D + 70	Delay = −0.54BP + 137	Delay = 1.52PS + 33
	r2 = 0.29	r2 = 0.21	r2 = 0.01	r2 = 0.13	r2 = 0.12
	p = 0.14	p = 0.18	p = 0.49	p = 0.24	p = 0.25
tpeak	Delay = 2.24VP + 137	Delay = −92.1P + 366	Delay = 62.3D + 106	Delay = −0.48BP + 228	Delay = 5.24PS + 62
	r2 = 0.03	r2 = 0.86	r2 = 0.01	r2 = 0.02	r2 = 0.35
	p = 0.38	p = 0.004	p = 0.46	p = 0.38	p = 0.11
Rise time	Delay = 8.3VP + 117	Delay = −81.7P + 387	Delay = −156.7D + 342	Delay = −1.51BP + 416	Delay = 4.7PS + 116
	r2 = 0.25	r2 = 0.48	r2 = 0.02	r2 = 0.18	r2 = 0.20
	p = 0.15	p = 0.06	p = 0.41	p = 0.20	p = 0.19

VP, Vapor pressure; BP, boiling point; D, density, PS, polar surface. Values in bold are statistically significant.