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The uropygial gland fats from the razorbill, guillemot (two varieties) and the black guillemot arc very complex mixtures of ester waxes. Among the wax acids n- octanoic acid dominates followed by homologous series of 2-, 4- and 6-monomethyl-, 2,6-, 2,8-, 2,10-, 4,6-, 4,8-, 4,10-, 4,12-dimethyl- and 2,4,8-, 2,6,10-, 2,6,12-, 4,6,10- and 4,8,12-trimethyl-substituted fatty acids. The alcoholic components consist of n-, 2-, 4-, 6-, 8- and 12-monomethyl- as well as 2,6-, 2,8-, 2,10-, 4,6-, 4,8-, 4,10- and 4,12-dimethyl - branched alkanols.

zeitschrift für naturforschung c

Zur Chemotaxonomie der Alkenvögel. Die Zusammensetzung der Bürzellipide des Tordalks (Alca torda), der Trottel- und Ringellume (Uria aalge) und der Gryllteiste (Cepphus grylle) / Chemotaxonomy of Alcidae. The Composition of the Uropygial Gland Fat from the Razorbill (Alca torda), Guillemot (Uria aalge) and the Blade Guillemot (Cepphus grylle)