It also relates to experimental methods for validating {TAIL ~ such pseudoscents}, and defines {HEAD ~ the compositions} of some pseudoscents simulants 
It also relates to experimental methods for validating { TAIL ~ such pseudoscents } , and defines { HEAD ~ the compositions } of some pseudoscents simulants
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH