Nevertheless, despite the strong influence of experience, the physicochemical properties of odorants still played a prominent role in determining odor preferences, strengthening Khan et al.'s model [10].
To determine odor intensity by electronic nose firstly a collective index was generated using SVD based 2-norm method (e-nose index) proportional to the sensors response relative to reference gas, methyl mercaptan.
Recently, it has been established that this technique can be used to determine odor preferences in rodents [14].
One theory is that acquired odor semantic knowledge is one of the important factors that determines odor hedonic valence [1], [2], [3], [4].
An alternative view is that the olfactory system is predisposed to discriminate environmental olfactory stimuli on the basis of their physicochemical properties, and that this peripheral coding partly determines odor hedonic perception [5], [6], [7].
OBPs and the structurally-related pheromone binding proteins (PBPs) are the first proteins to interact with the odor and, by an inherent binding preference determined by their ligand pocket that is formed by six α-helices [9], may help determine odor responses.
Second, to determine odor preferences, females were allowed to investigate the scent marks with the males removed from the arena (females did not wear collars).
Authorities later determined the odor came from the back of the JetBlue plane, instead of the front.
Later, fire and bomb squad officials determined the odor was emanating from a generator inside the home, he said.
Alternatively, how much variation in behavioral responses is determined by odor receptor activity in addition to vapor pressure?
