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1995 (1)
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1Author    V. Ogler, F. Ranz, A. N. EugebauerRequires cookie*
 Title    H elm u t  
 Abstract    The striking similarities of the hypsochromic shifts of the longest wavelength absorption o b ­ served in the serie 1—3 and 4 —6 are rationalized by means o f sim ple molecular orbital theory. 
  Reference    Z. Naturforsch. 39b, 1790—1794 (1984); received May 10 1984 
  Published    1984 
  Keywords    Electronic Spectra, Betaines, Verdazyls 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1790.pdf 
 Identifier    ZNB-1984-39b-1790 
 Volume    39 
2Author    B. Rigitte, S. ChobertRequires cookie*
 Title    A Near-Infrared Spectroscopic Investigation of Water in Solutions with Proline, Glycinebetaine, Glycerol and Albumin  
 Abstract    The (v2 + v3) com bination band o f water has been investigated in aqueous solutions o f proline, glycinebetaine and glycerol and in a three component solution with each o f these substances and albumin. It is shown that the hydrogen bonding strength between the water protons and proline or betaine is higher than between water and glycerol. Betaine exhibits a higher affinity versus the oxygen o f water than does proline. The water binding capacity o f pure proline solutions is unchanged in a three-com ponent solu­ tion with albumin. Proline neither enhances nor reduces the solubility o f this highly soluble pro­ tein. In contrast, in a three-com ponent solution with betaine, the solubility o f both betaine and al­ bum in is reduced. It is assumed that these solute particles com pete for the sam e binding position on the water m olecule. Concentrated glycerol solutions with very low water concentrations dissolve a considerable am ount o f albumin, which points to the fact that the protein must be partly dis­ solved in glycerol itself. 
  Reference    Z. Naturforsch. 34c, 699—703 (1979); received February 2/M ay 29 1979 
  Published    1979 
  Keywords    Water, Protein, Proline, Betaine, Glycerol 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0699.pdf 
 Identifier    ZNC-1979-34c-0699 
 Volume    34 
3Author    FrankW. Heinemann, Helm Ut, Hartung, NadjaM. AierRequires cookie*
 Title    Kristall-und Molekülstruktur von 2-[3-(N,N-Diethylammonium)propylimino]-2-phenyl-dithioacetat Crystal and Molecular Structure of 2-[3-(N,N-Diethylammonium)propylimino]-2-phenyl-dithioacetate  
 Abstract    The title compound, formed by the reaction o f acetophenone with 3-diethylamino-1-propylamine and sulfur, crystallizes in the orthorhombic space group P 2 12 12 1 (Z = 4) with lattice constants a = 818.1(2) pm, b -1225.1(2) pm and c = 1622.4(4) pm. The characterization of the molecule as a zwitterion is established by the observed bond parameters. Both spec­ troscopic investigations and the results of the X-ray structure determination show that a hydrogen atom is bonded to the amino nitrogen rather than to the imino nitrogen. 
  Reference    (Z. Naturforsch. 50b, 81—8 [1995]; eingegangen am 9. August 1994) 
  Published    1995 
  Keywords    Dithioacetates, A cetophenone, Crystal Structure, Zwitterion, Betaine 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0081.pdf 
 Identifier    ZNB-1995-50b-0081 
 Volume    50