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1984 (2)
1980 (1)
1Author    EckhardW. Ollenw Eber, K. Arin, M. AnnRequires cookie*
 Title    Flavonoid Aglycones in the L eaf Resin o f Som e Cistus Species  
 Abstract    Members o f the genus Cistus excrete a leaf resin that consists mainly o f terpenoids. This resin also contains methylated flavonoids as aglycones. Rare methyl deri­ vatives o f myricetin have been isolated from C. monspeli-ensis, along with uncommon methyl derivatives o f quer-cetin. Further flavonoids encountered in the leaf resin o f this and six further species are methyl derivatives o f kaempferol and quercetin, som e o f apigenin and in one species also o f luteolin. The results indicate that there might exist species-specific flavonoid patterns. 
  Reference    Z. Naturforsch. 39c, 303 (1984); received Decem ber 2 1983 
  Published    1984 
  Keywords    Cistus, Cistaceae, Leaf Resin, Methyl Flavonoids, Aglycones 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0303_n.pdf 
 Identifier    ZNC-1984-39c-0303_n 
 Volume    39 
2Author    Dieter Strack, Peter Proksch, Paul-G Erhard GülzRequires cookie*
 Title    Reversed Phase High Performance Liquid Chromatography of Essential Oils  
 Abstract    A reversed phase high performance liquid chromatographic procedure for the separation of essential oils is described. Applying water-acetonitrile elution systems on octyl and octadecyl-silane-bonded silica, complex mixtures o f sequiterpenes and oxygenated volatile constituents can be resolved, comparably to the quality o f gas chromatographic analysis. Photometrical detection at different wavelengths can be an important parameter in optimizing the separation of essential oil constituents. The application o f the described method is demonstrated with naturally occurring mixtures of terpenes from leaves of Cistus ladanifer. 
  Reference    Z. Naturforsch. 35c, 675—681 (1980); received June 20 1980 
  Published    1980 
  Keywords    High Performance Liquid Chromatography (HPLC), Essential Oils, Terpenes, Terpenoids, Cistus, Cistaceae 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0675.pdf 
 Identifier    ZNC-1980-35c-0675 
 Volume    35 
3Author    PatrickK. Rollm Ann, C. Lau D Ia Eich, P. Au, L-G Erh Ard, G. Ü. LzRequires cookie*
 Title    Epicuticular Waxes of Seed Coats from Species of the Genus Cistus L. (Cistaceae)  
 Abstract    Epicuticular waxes were extracted with hexane from seed coats o f 16 species from the genus Cistus (Cistaceae) in amounts corresponding to an average o f 0.07% per dry weight. All cuticular waxes obtained from the various Cistus species consisted o f hydrocarbons, wax esters, triterpenol esters, aldehydes, primary alcohols and free fatty acids. These com pounds were present as homologues in changing patterns. In addition two unidentified acids and two unknown alcohols were found. Epicuticular waxes from seed coats differed qualitatively and quantitatively from those o f Cistus leaves and petals and confirmed the existence o f organ sp ecific com positions o f epicuticular waxes. The wax com ponents secreted in this com position result in a cover which in scanning electron microscopic pictures resembles a sm ooth layer o f solidified fluid lacking any crystalline structure. 
  Reference    Z. Naturforsch. 39c, 521 (1984); received February 6 1984 
  Published    1984 
  Keywords    Cistus, Epicuticular Waxes, Seed Coats, Fluid Surface Layer, Scanning Electron M icroscopy 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0521.pdf 
 Identifier    ZNC-1984-39c-0521 
 Volume    39