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1982 (1)
1981 (1)
1Author    W. Francke, W. Reith, G. Bergström, J. TengöRequires cookie*
 Title    Pheromone Bouquet of the Mandibular Glands in Andrena haemorrhoa F. (Hym., Apoidea)  
 Abstract    The complex volatile secretion from the mandibular glands of Andrena haemorrhoa (Hym., Apoidea) has been analysed by GC/M S. It is composed primarily o f three groups of compounds: 1. Spiroacetals of five different systems: two l,6-dioxyspiro[4.4]nonanes, four l,6-dioxaspiro[4.5] decanes, two l,7-dioxaspiro[5.5]undecanes, one l,6-dioxaspiro[4.6]undecane and one 1,7-dioxa-spiro[5.6]dodecane. 2. Straight chain fatty acid derivatives: methyl ketones, primary and secondary alcohols, acetates and hydrocarbons. 3. Isoprenoids: geraniol and geranyl acetate. Mass spectral fragmentation patterns have been studied for several synthesized spiroacetals. 
  Reference    Z. Naturforsch. 36c, 928 (1981); received September 14/October 5 1981 
  Published    1981 
  Keywords    Andrena, Mandibular Glands, Pheromone, Spiroacetals 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0928.pdf 
 Identifier    ZNC-1981-36c-0928 
 Volume    36 
2Author    Gunnar Bergström, Jan Tengö, Wolfgang Reith, W. Ittko FranckeRequires cookie*
 Title    Multicomponent Mandibular Gland Secretions in Three Species of Andrena Bees (Hym., Apoidea)  
 Abstract    50 volatile constituents o f the mandibular gland secretions in males and females o f three species o f Andrena bees, A. wilkella (Chr.), A. ovatula (K .) and A. ocreata (K .), have been identified. The secretions are made up o f a series o f spiroacetals o f four different systems together with m ono-terpenes and unbranched acyclic compounds. Many o f the com ponents, particularly several o f the dominant ones, occur in both sexes o f all three species, so that the volatile secretions are qualita­ tively very similar. Females contain about 100 |ig per individuum , which is 3 -5 tim es the amount o f the males' secretions. Major spiroacetals are E,E-and Z ,E -2 ,8-dim ethyl-1,7-dioxa-spiro[5.5]undecane and E,E-and Z ,£-2-ethyl-7-m ethyl-l,6-dioxaspiro[4.5]undecane, while prom i­ nent monoterpenes are geraniol and citronellol. Straight chain hydrocarbons C 17, C19, C 21 and C23 occur in fairly large amounts, mostly with increasing concentrations. W ith respect to the quantita­ tive distribution o f components o f minor concentration, the bouquet o f A. wilkella is clearly dis­ tinguishable from A. ovatula and A. ocreata which from the m orphological and ethological point o f view are more closely related. Behaviour tests with A. w ilkella indicate high biological activity o f the main spiroacetal. 
  Reference    Z. Naturforsch. 37c, 1124 (1982); received May 6 1982 
  Published    1982 
  Keywords    Andrena, Mandibular Gland, Pheromone, Spiroacetals 
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 DEBUG INFO      
 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-1124.pdf 
 Identifier    ZNC-1982-37c-1124 
 Volume    37