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1Author    F. A. Tom Ás-Barberán, F. Ferreres, F. Tom Ás-Lorente, A. OrtizRequires cookie*
 Title    Flavonoids from Apis mellifera Beeswax  
 Abstract    The flavonoids present in beeswax produced in "La Alcarria" region were analyzed by HPLC. Pinocembrin, pinobanksin, pinobanksin 3-acetate, chrysin, galangin and techtochry-sin were detected as the main flavonoid constituents. This is the first detailed report on the flavonoids o f beeswax. These substances are already present when wax scales are secreted by bees. The same flavonoid com pounds were generally present in honey, propolis and Populus nigra bud exudates collected in the same geographical region. These results indicate that bees­ wax flavonoids originate from those o f honey and/or propolis, and suggest that analysis o f beeswax flavonoids could be used as an adjunct in the detection o f beeswax adulterations. 
  Reference    Z. Naturforsch. 48c, 68—7 (1993); received N ovem ber 19 1992/January 1 1993 
  Published    1993 
  Keywords    Beeswax, Apis mellifera, Flavonoids, H oney, Propolis, Botanical Origin, Characterization 
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 TEI-XML for    default:Reihe_C/48/ZNC-1993-48c-0068.pdf 
 Identifier    ZNC-1993-48c-0068 
 Volume    48 
2Author    Heinz Rembold, Christian Czoppelt, GireeshK. SharmaRequires cookie*
 Title    Precocene II is no Anti-Juvenile Hormone in the Honey Bee, Apis mellifera  
 Abstract    The effect o f precocene II on development o f the honey bee, Apis mellifera, was studied in vitro. One-to two-day-old worker larvae (body weight 0.5 — 1.0 mg) were removed from the colonies, reared on royal jelly-yeast extract, and after 24 h were topically applied with different amounts (5 -75 |ig/larva) of precocene II. Toxicity was observed only with precocene doses o f 50 (ag/larva and more. The larval weight-gains declined with the increase o f doses. The acetone-treated control had better survival and weight-gain as compared to the no-treatment control. The larval and pu­ pal periods in the treated larvae remained unchanged as compared to the controls. The possibility of precocene acting as an antifeedant is discussed. 
  Reference    Z. Naturforsch. 34c, 1261—1263 (1979); received July 31 1979 
  Published    1979 
  Keywords    Precocene II, Anti-Juvenile Hormone, Honey Bee, Apis mellifera, Anti-Feedant 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-1261.pdf 
 Identifier    ZNC-1979-34c-1261 
 Volume    34 
3Author    Eckhard Wollenweber3, StephenL. BuchmannbRequires cookie*
 Title    Feral Honey Bees in the Sonoran Desert: Propolis Sources other than Poplars (Populus spp.)  
 Abstract    In Central Europe and other temperate regions the lipophilic bee hive product propolis normally originates from the bud exudate of poplar trees that is collected by the bees. Based on bee observations, various other sources have been discussed in particular for tropical regions, but in only few cases the origin has been proved by analytical methods. We have analyzed propolis samples from managed honey-bees as well as from feral bee colonies in the Sonoran Desert. Propolis collected in hives out of flight reach of poplars contained flavonoid aglycones and other phenolics that point to specific plants as the source of propolis in this area, namely Ambrosia deltoidea and Encelia farinosa. 
  Reference    Z. Naturforsch. 52c, 530—535 (1997); received April 25 1997 
  Published    1997 
  Keywords    Apis mellifera, Feral Bees, Sonoran Desert, Propolis, Plant Source, Ambrosia, Encelia, Resinous Exudates 
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 TEI-XML for    default:Reihe_C/52/ZNC-1997-52c-0530.pdf 
 Identifier    ZNC-1997-52c-0530 
 Volume    52