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
Pith and substance circumscribed. Cases relating to Pith and Substance.- Citation in the matter of M/s. Sky Gourmet Catering Private Limited V/s Tax Authorities (Commercial Tax and Service Tax) in the matter of Writ Appeal No. 671 to 726 of 2011 (T-Res) decided on 18th day of April, 2011 by Hon'ble High Court of Karnataka at Bangalore may also be seen. Pith and substance Pith and substance is a legal doctrine in Canadian constitutional interpretation used to determine under which head of power a given piece of legislation falls. The doctrine is primarily used when a law is challenged on the basis that