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The odor detection threshold is the lowest concentration of a certain odor compound that is perceivable by the human sense of smell. The threshold of a chemical compound is determined in part by its shape, polarity, partial charges, and molecular mass. The olfactory mechanisms responsible for a compound's different detection threshold is not ...
Triethylenetetramine (TETA and trien), also known as trientine when used medically, is an organic compound with the formula [CH 2 NHCH 2 CH 2 NH 2] 2.The pure free base is a colorless oily liquid, but, like many amines, older samples assume a yellowish color due to impurities resulting from air oxidation.
Equine drug testing is a form of drug testing applied to performance horses in regulated competition. Most common in racehorses, drug tests are also performed on horses in endurance riding and in international competition such as the Olympics and FEI-sanctioned competition.
The recognition odor threshold is usually a factor of two to five higher than the detection threshold. [22] The measurement of odor concentration is the most widespread method to quantify odors. It is standardized in CEN EN 13725:2003. [23] The method is based on dilution of an odor sample to the odor threshold. The numerical value of the odor ...
The by-products are dimethyl sulfide ((CH 3) 2 S), carbon monoxide (CO), carbon dioxide (CO 2) and—when triethylamine is used as base—triethylammonium chloride (Et 3 NHCl). Of the volatile by-products, dimethyl sulfide has a strong, pervasive odour and carbon monoxide is acutely toxic, so the reaction and the work-up needs to be performed ...
Oct-1-en-3-one has a strong metallic mushroom-like odor with an odor detection threshold of 0.03–1.12 μg/m 3 and it is the main compound responsible for the "smell of metal", followed by decanal (smell: orange skin, flowery) and nonanal (smell: tallowy, fruity). [3]
Denatonium, usually available as denatonium benzoate (under trade names such as Denatrol, BITTERANT-b, BITTER+PLUS, Bitrex, Bitrix, and Aversion) and as denatonium saccharinate (BITTERANT-s), is the most bitter chemical compound known, with bitterness thresholds of 0.05 ppm for the benzoate and 0.01 ppm for the saccharinate. [1]
Many horse management handbooks recommend grooming a horse daily, though for the average modern horse owner, this is not always possible. However, a horse should always be groomed before being ridden to avoid chafing and rubbing of dirt and other material, which can cause sores on the animal and also grind dirt into horse tack .