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'Chalcones' in keywords
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1995 (1)
1974 (1)
1Author    JochenB. Erlin, +., Peter Kiss, D. Ieter, M. Üller-Enoch, D. Ieter Gierse, W. Olfgang Barz, B. Oris JanistynRequires cookie*
 Title    Über den Abbau von Chalkonen und Isoflavonen in pflanzlichen Zellsuspensionskulturen Degradation of Chalcones and Isoflavones in P lant Cell Suspension Cultures  
 Abstract    Cell suspension culture of Phaseolus aureus, Glycine max and Pisum sativum have been used to determine the extent of chalcone and isoflavone catabolism. The A-rings of calcones and isoflavones with both resorcinol and phloroglucinol pattern of sub­ stitution have unequivocally been shown to be degraded as measured by carbon dioxide production The earlier described catabolic pathway of chalcones with the B-ring liberated as a substituted benzoic acid has been verified using another chalcone. With the use of various u C-labelled isoflavones it could be demonstrated that essentially all carbon atoms are introduced into catabolic reactions. Incorporation of 4',7-dihydroxyisoflavone (daidzein) into insoluble polymeric material has been shown to proceed via the 3',4',7-trihydroxyisoflavone. 3'-Hydroxylation and subsequent polymeri­ sation of the orf/io-dihydroxy compound can completely be inhibited by using anaerobic conditions which favour glucoside formation instead. 4'-0-Methylgroups in isoflavones prevent the phenolase catalzyed 3'-hydroxylation and thus the incorporation of isoflavones into polymeric structures. 6,7-Dihydroxy substituted insoflavones when fed to cell cultures are not polymerized by phenolase but are rather converted to glycosides. 
  Reference    (Z. Naturforsch. 29c, 374 [1974]; eingegangen am 1. April 1974) 
  Published    1974 
  Keywords    Chalcones, Isoflavones, Catabolism, Plant Cell Cultures 
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 TEI-XML for    default:Reihe_C/29/ZNC-1974-29c-0374.pdf 
 Identifier    ZNC-1974-29c-0374 
 Volume    29 
2Author    C.La Casa, M.J Martin Calero, C. Alarcon De La Lastra, V. Motilva, M. J. Ayuso, C., Martin Cordero, A. Lopez VergaraRequires cookie*
 Title    Role of Mucus Secretion and Sulfhydryl Groups in Gastroprotection Mediated by a Flavonoid Fraction of Bidens aurea  
 Abstract    The aerial parts of Bidens aurea (Aiton) Sherff have been used in folk medicine as an antiulcer agent. The efficacy of an ether extract to prevent gastric mucosal damage produced by several necrotic agents was studied in rats. The best efficiency was against lesions induced by 30% NaCl with a significant decrease of damage at all doses tested (250, 125 and 62.5 mg kg'1). In contrast, only the highest dose (250 mg kg"1) was effective on gastric erosions in­ duced by 0.6 n HC1. This effect could not be related with the mucus gel production only since the groups treated with of absolute ethanol or 30% NaCl before and then received 250 mg kg"1 of the ether extract increased significantly the am ount of gastric mucus and its glycoprotein content. However, the ether extract of Bidens aurea enhanced the production of mucosal non-protein SH groups at all doses assayed after treatm ent with absolute ethanol and 0.6 n HC1. With NaCl-induced gastric injury, also the highest dose (250 mg k g 1) pro­ duced an increase of this param eter. The results suggest that a slight augmentation of the mucus gel concentration and the increase of non-protein sulfhydryl compounds, could con­ tribute to the functional protection mechanism mediated by a flavonoid fraction of B.aurea in these experimental models. 
  Reference    Z. Naturforsch. 50c, 854—861 (1995); received June 1/August 15 1995 
  Published    1995 
  Keywords    Cytoprotection, Bidens aurea, Sulfhydryl Groups, Aurones, Chalcones 
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 TEI-XML for    default:Reihe_C/50/ZNC-1995-50c-0854.pdf 
 Identifier    ZNC-1995-50c-0854 
 Volume    50