Salicylaldehyde be prepared from the corresponding phenol by the Duff reaction, or by treatment with paraformaldehyde in the presence of magnesium chloride and a base. Salicylaldehyde was identified as a characteristic aroma component of buckwheat. It is also one of the components of castoreum, the exudate from the castor sacs of the mature North American beaver ("Castor canadensis") and the European beaver ("Castor fiber"), used in perfumery. Furthermore, salicylaldehyde occurs in the larval defensive secretions of several leaf beetle species that belong the subtribe Chrysomelina. An example for a leaf beetle species that produces salicylaldehyde is the red poplar leaf beetle
The Inner or Deep Part of an Animal or Plant Structure The Inner or Deep Part of an Animal or Plant Structure The Inner or Deep Part of an Animal or Plant Structure is an official DVD released by Björk on August 31, 2004. It is a 45-minute film about the making of the "Medúlla" album. The DVD features clips of the studio performances by Dokaka, Shlomo, Rahzel and Mike Patton that formed the beats for many of the songs on the album. It was originally issued as a bonus feature on the multichannel DVD-A of 'Medulla' and then later reissued by itself as a separate disc. The title of the