Odorants mainly use two different routes for travel toward the olfactory epithelium, located orthonasally and retronasally.
The study applied a combined human-sensory and odorant-analytical method to identify the main
odorants in the sampled decorative wood-based panels.
The investigators used gas chromatography-olfactometry and aroma extract dilution analysis (AEDA) to screen the potent
odorants in the DSE-SAFE aroma extracts of the sauces.
Fresh and greenish
odorants such as (E)-2-hexanal and (Z)-3-hexanol are derived from lipid oxidation [5].
In addition, 4 bio-functional
odorants were selected, all of which elicited significant electroantennogram (EAG) responses in other Coleoptera species but had not been tested in A.
It has been sued by the state of California and Reuters reported that over 20 lawsuits have been filed by residents as people complained of headaches, nausea and respiratory irritation from the
odorants added to natural gas.
However, there is at present no research that characterizes the entire range of
odorants and their correlation to microclimate variables in these systems.
Odorants, flavor compounds, and pigments begin to close the book, with the final few chapters addressing antinutritional or toxic organics naturally occurring in some foods, food additives, and potential contaminants of concern.
The spatially distributed arrangement of aesthetasc sensilla in these animals provides an unusual opportunity to determine the extent to which fractional regions of the receptor array contribute to the central representation of
odorants. Furthermore, crayfish antennular flagella grow continuously throughout an animal's lifespan by adding annuli and sensilla at their base; this means that aesthetascs near the flagellum tip are the oldest, and in adult individuals a proportion of them, along with the distal annuli, are shed at each molt (Sandeman and Sandeman, 1996).
The researchers found that the almost unlimited variety of food smells is based on 230 key
odorants and each foodstuff has its own odor code comprised of a core group of between just 3 and 40 of the 230 key
odorants, in specific concentrations, so these small groups of odorous substances are what give all kinds of foodstuffs from pineapple to wine to roast meat their unmistakable aromas.
They're training a Springer Spaniel, German Shepherd Dog and Labrador Retriever to sniff out the disease--chiefly the presence of volatile organic compounds known as
odorants that undergo change early in the cancer's development.