Dufour\u27s Gland and its Role in Secretion of Nest Cell Lining in Bees of the Genus Colletes (Hymenoptera: Colletidae)

The liquid secretion of the Dufour\u27s gland in mated females comprises a mixture of macrocyclic lactones, straight chain mono-and dicarboxylic acids, together with trace amounts of di- and trihydroxy monocarboxylic acids and a series of n-alkanes. Polymerization of the liquid to form the membranous nest cell lining, which also contains alanine and glutamic acid as major constituents, may be mediated by an enzyme from the thoracic salivary gland and voided via the mouth. The composition and structure of the cell linings are similar to those of Wigglesworth\u27s cuticulin

New car security guidance Home Office policy

SIGLEAvailable from British Library Document Supply Centre-DSC:7072.79695(24/98) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

New car security guidance Home Office policy

SIGLEAvailable from British Library Document Supply Centre-DSC:7072.79695(24/98) / BLDSC - British Library Document Supply CentreGBUnited Kingdo