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'Beta vulgaris' in keywords
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2001 (2)
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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    M. Arbeth, Christ, JostH. Arr, Hansruedi FelixRequires cookie*
 Title    Transport of Polyamines in Sugar Beet Seedlings  
 Abstract    The high levels of polyamines generally found in cotyledons of seedlings might be exported to hypocotyls and radicles. l4C-Labelled putrescine applied to a sugar beet seedling through a cotyledon was found in small amounts as putrescine in the hypocotyl or radicle within a few minutes. Significant amounts of the labelled putrescine, however, were metabolized rapidly to compounds which could not be extracted into the organic phase on dansylation. 
  Reference    Z. Naturforsch. 44c, 59 (1989); received August 1. 1988 
  Published    1989 
  Keywords    Beta vulgaris, Cotyledon Hypocotyl, Metabolism Putrescine Radicle 
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 TEI-XML for    default:Reihe_C/44/ZNC-1989-44c-0059.pdf 
 Identifier    ZNC-1989-44c-0059 
 Volume    44 
3Author    Tytti Kujala, Karel Klika, Vladimir Ovcharenko, Jyrki Loponen, Maarit Vienola, Kalevi PihlajaRequires cookie*
 Title    5,5',6,6'-Tetrahydroxy-3,3'-biindoIyl from Beetroot {Beta vulgaris) Peel Extract  
 Abstract    Fax: + 3 5 8 2 -3 3 3 6700. E-mail: tytti.kujala@utu.fi A compound of unusual structure was isolated extract and identified as 5,5',6,6'-tetrahydroxy-3,3' N M R and MS studies. 
  Reference    Z. Naturforsch. 56c, 714 (2001); received May 2/M ay 31 2001 
  Published    2001 
  Keywords    Beta vulgaris, Beetroot, Nitrogen Heterocycles, Biindolyls 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0714.pdf 
 Identifier    ZNC-2001-56c-0714 
 Volume    56 
4Author    Chandra Surendra, Subash Sabat3, Prasanna Padhyeb, MohantycRequires cookie*
 Title    Inhibitory Effects of Synthetic Lanthanum-Crown Ether at the Reducing Side of Photosystem II  
 Abstract    Inhibitory effects of lanthanum-crown [La-(Pic)3 (15-crown-6) 3H2OJ.was investigated on the 0 2 evolution activity of photsystem II particles. Lanthanum (La)-crown inhibited the electron flow at the reducing side of PS II complex. Short duration (1 -2 min) treatment of PS II membranes with trypsin partly developed resistance to La-crown inhibition. However, longer proteolytic treatment (>2 min) appeared to expose newer site(s) for La-crown inhibi­ tion. The inhibitory constant (K,) for La-crown was nearly 0.17 | j ,m . This inhibitory capacity is about 4 to 5 times less than the potent PS II inhibitor diuron which also binds at the acceptor side of PS II. The number of binding sites for La-crown was found to be 1 per 20 chlorophyll molecules. The Hill plot analysis showed the presence of three distinct straight lines suggesting that the compound acts at least at three sites. Furthermore, from the slope value (Hill coefficient) it is suggested that two of these sites provide minimum of two binding domains for the inhibitor. 
  Reference    Z. Naturforsch. 53c, 49 (1998); received June 16/September 29 1997 
  Published    1998 
  Keywords    Beta vulgaris, Electron Transport Inhibition, Lanthanum Crown, Photosystem II Particles 
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 TEI-XML for    default:Reihe_C/53/ZNC-1998-53c-0049.pdf 
 Identifier    ZNC-1998-53c-0049 
 Volume    53