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
Shadow and Substance Shadow and Substance "Shadow and Substance "is an award-winning four-act play written in 1937 by Paul Vincent Carroll. In 1938 it won the New York Drama Critics' Circle award for best foreign play. First published by Samuel French in 1944. Set in Ireland, the play has a cast of six men and four women. According to George Jean Nathan "deals with the Catholic Church in Ireland. Its theme lies in the ramifications of faith as practiced by the Church's various constituents…faith that, for all its sincerity, has drifted from its deepest moorings, and the manner in which a true, steadfast,