41. :Ligand ( in this case : odorant ) binding to Kd constant; high affinity means good fit ). 42. Repeated exposure to an odorant leads to enhanced olfactory sensitivity and decreased detection thresholds for a number of different odorants. 43. It is a synthetic woody odorant and is used as a fragrance ingredient in perfumes, laundry products and cosmetics. 44. The community of Eight Mile, Alabama had a spill of the natural gas odorant within their community in 2008. 45. An odorant is recognized by more than one type of receptor and thus odorants are recognized by a combination of receptors. 46. It is important to identify whether the distortion applies to an inhaled odorant or if an odor exists without the stimulus. 47. As in natural gas, an odorant can be added to hydrogen sources to enable leaks to be detected by smell. 48. Odorants, which are mostly small lipophilic molecules, enter the mucus flow and reach the odorant receptors on sensory neurons. 49. "A sniff straightens the nasal cavity so the odorant hits straight to the olfactory mucosa, " he said. 50. The gas is pressurized by compressor stations and is odorless unless mixed with a mercaptan odorant where required by a regulating authority.
