Preen gland

Preen gland wax of the graylag goose, Anser anser (2005)199... 

Soini, H.A., Schrock, S.E., Bruce, K.E., Wiesler, D., Ketterson, E.D. and Novotny, M.V. (2007) Seasonal variation in volatile compound profiles of preen gland secretions of the dark-eyed junco (Junco hyemalis). J. Chem. Ecol. 33, 183-198. 

Preen gland wax of graylag goose Anser anser Al(Zn) Br E. Negishi 127... 

A modification of the swelling apparatus was used to evaluate WPC, peanut protein, single cell protein (SCP), and chicken preen gland protein. Chicken protein exhibited the highest swelling values followed in decreasing order by peanut, SCP, and WPC products (15). 

Waxes also serve a diversity of other functions related to their water-repellent properties and their firm consistency. Certain skin glands of vertebrates secrete waxes to protect hair and skin and keep it pliable, lubricated, and waterproof. Birds, particularly waterfowl, secrete waxes from their preen glands to keep their feathers water-repellent. The shiny leaves of holly, rhododendrons, poison ivy, and many tropical plants are coated with a thick layer of waxes, which prevents excessive evaporation of water and protects against parasites. 

A group termed other esters includes a large variety of functionally diverse lipids. Wax esters are a typical example. The term wax is used commonly for esters of long-chain fatty acids with long-chain primary alcohols, but sometimes it is used for the entire mixture of lipids that contain waxes. Ester waxes are present in both plants and animals where they form the water-repellent surface coating (e.g., skin surface of animals and the leaf cuticle). Esters of normal alcohols with monobranched or multibranched fatty acids have been found in the preen glands of birds (2). Complex waxes (in which either the fatty acid or the alcohol component or both has a complex structure) have been isolated from some bacteria. Diesters... 

Downing, D.T. (1986). Preen gland and scent gland lipids. In... 

Kolattukudy, P.E., Rogers, L. Flurkey, W. (1985). Suppression of a thioesterase gene expression and the disappearance of short chain fatty acids in the preen gland of the Mallard duck during eclipse, the period following postnuptial molt. ]. Biol. Chem., 260, 10789-93. 

Similar polymethyl branched acids are dominant in the uropygial waxes produced by the preen gland of... 

The preen glands of birds, in addition, contain esters of normal alcohols with mono- or multi-branched fatty acids (Odham, 1967). 

Et ester [16177-05-2]. Occurs in preen gland of water birds. 

A main constit. of the preen gland wax of the common goose (Anser anser), also present in small amounts in the preen gland wax of other spp. [a] -16.4 , -26.6 . 

Me ester Present in preen gland waxes of ruddy shelduck (Tadorna ferruginea) and common shelduck (T. to-dorna). -32 . 

Me ester [2490-57-5]. Constit. of the preen gland waxes of the ruddy shelduck Tadorna ferruginea) and common shelduck T. tadorna). [a] —22.9°. 

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