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'Phenolics' in keywords Facet   Publication Year 2001  [X]
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2001[X]
1Author    Tytti Kujala, Jyrki Loponen, Kalevi PihlajaRequires cookie*
 Title    Betalains and Phenolics in Red Beetroot (Beta vulgaris) Peel Extracts: Extraction and Characterisation  
 Abstract    The extraction of red beetroot (Beta vulgaris) peel betalains and phenolics was compared with two extraction methods and solvents. The content of total phenolics in the extracts was determined according to a modification of the Folin-Ciocalteu method and expressed as gallic acid equivalents (G A E). The profiles of extracts were analysed by high-performance liquid chromatography (HPLC). The compounds of beetroot peel extracted with 80% aqueous methanol were characterised from separated fractions using HPLC-diode array detection (H PL C -D A D) and HPLC-electrospray ionisation-mass spectrometry (H PLC-ESI-M S) tech­ niques. The extraction methods and the choice of solvent affected noticeably the content of individual compounds in the extract. The betalains found in beetroot peel extract were vulgaxanthin I, vulgaxanthin II, indicaxanthin, betanin, prebetanin, isobetanin and neobe-tanin. A lso cyclodopa glucoside, /V-formylcyclodopa glucoside, glucoside of dihydroxyindol-carboxylic acid, betalamic acid, L-tryptophan, p-coumaric acid, ferulic acid and traces o f un­ identified flavonoids were detected. 
  Reference    Z. Naturforsch. 56c, 343 (2001); received January 9/February 12 2001 
  Published    2001 
  Keywords    Beta vulgaris, Betalains, Phenolics 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0343.pdf 
 Identifier    ZNC-2001-56c-0343 
 Volume    56 
2Author    Wanda Kisiel, Klaudia MichalskaRequires cookie*
 Title    Sesquiterpenoids and Phenolics from Crepis conyzifolia  
 Abstract    From the roots of Crepis conyzifolia, two new and two known guaianolides were isolated together with three known phenylpropanoids. Structures of the new compounds were estab­ lished as 8ß-hydroxy-4ß, 15-dihydrozaluzanin C and 4ß, 15, llß , 13-tetrahydrozaluzanin C-3-O-ß-glucopyranoside by spectral methods. The identity of 8 -epiisolippidiol and dentalactone was also discussed. 
  Reference    Z. Naturforsch. 56c, 961—964 (2001); received July 30/August 28 2001 
  Published    2001 
  Keywords    Crepis conyzifolia, Sesquiterpenoids, Phenolics 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0961.pdf 
 Identifier    ZNC-2001-56c-0961 
 Volume    56 
3Author    Z. NaturforschRequires cookie*
 Title    Phenolic Compounds of Propolis from Central Chilean Matorral  
 Abstract    Pinocembrin, acacetin, galanguin, izalpin, kaempferide, prenyletin and diarytheptane were isolated from propolis from Central Chile. 
  Reference    Z. Naturforsch. 56c, 273—2 (2001); received D ecem ber 6 2000/January 23 2001 
  Published    2001 
  Keywords    Propolis, Structure Elucidation, Plant Sources, Phenolics 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0273.pdf 
 Identifier    ZNC-2001-56c-0273 
 Volume    56