Catechol one of the main natural phenols in argan oil and is a component of castoreum, a substance from the castor gland of beavers, used in perfumery. It is also found in "Agaricus bisporus". Catechol moieties are also found widely within the natural world. Arthropod cuticle consists of chitin linked by a catechol moiety to protein. The cuticle may be strengthened by cross-linking (tanning and sclerotization), in particular, in insects, and of course by biomineralization. Catechols such as DHSA are produced through the metabolism of cholesterol by bacteria such as "Mycobacterium tuberculosis". Urushiols are naturally existing organic compounds that have the
Nobel Prize in Physiology or Medicine this year's prize 'for Physiology or Medicine' to three men who had until recently been regarded as 'mere animal watchers'". Laureates have been awarded the Nobel Prize in a wide range of fields that relate to physiology or medicine. , eight Prizes have been awarded for contributions in the field of signal transduction through G proteins and second messengers. 13 have been awarded for contributions in the field of neurobiology and 13 have been awarded for contributions in Intermediary metabolism. The 100 Nobel Prizes in Physiology or Medicine have been awarded to 195 individuals through 2009. Twelve women have received