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Musk deer of Tibet in an 1835 illustration. Musk is a class of aromatic substances commonly used as base notes in perfumery.They include glandular secretions from animals such as the musk deer, numerous plants emitting similar fragrances, and artificial substances with similar odors.
Odor intensity can be expressed using an odor intensity scale, which is a verbal description of an odor sensation to which a numerical value is assigned. [31] Odor intensity can be divided into the following categories according to intensity: 0 – no odor 1 – very weak (odor threshold) 2 – weak 3 – distinct 4 – strong 5 – very strong
It has tiny hairs on the surface. The base of the stem is disc-shaped or somewhat bulbous, measuring 1–2.5 mm wide. The thin gills are free from attachment to the stem, or are adnexed (narrowly attached) to a slight collar encircling the stem. Initially white then grayish in color, they are somewhat crowded, with 17–32 full-length gills and ...
The primary olfactory cortex is in the inferior part of the temporal lobe of the brain. [1] It involves the anterior olfactory nucleus, [2] the piriform cortex, [2] the olfactory tubercle, [2] part of the amygdala, [2] part of the entorhinal cortex, [2] [3] and the periamygdaloid cortex.
Unpalatability, broadly understood, can be created in a variety of ways. Some insects such as the ladybird or tiger moth contain bitter-tasting chemicals, [14] while the skunk produces a noxious odor, and the poison glands of the poison dart frog, the sting of a velvet ant or neurotoxin in a black widow spider make
Floral scent, or flower scent, is composed of all the volatile organic compounds (VOCs), or aroma compounds, emitted by floral tissue (e.g. flower petals).Other names for floral scent include, aroma, fragrance, floral odour or perfume.
Acrolein (systematic name: propenal) is the simplest unsaturated aldehyde.It is a colorless liquid with a foul and acrid aroma. The smell of burnt fat (as when cooking oil is heated to its smoke point) is caused by glycerol in the burning fat breaking down into acrolein.
The individual may report that the odor comes from: the nose and/or mouth, i.e. halitosis (bad breath); the anus; the genitals; the skin generally; or specifically the groin, armpits or feet. The source(s) of the supposed odor may also change over time. [1] There are also some who are unsure of the exact origin of the odor. [1]