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1Author    H. Betting, M. StockhausenRequires cookie*
 Title    Dielectric Relaxation Study of Some Solutions Containing /3-Cyclodextrin and Dimethylsulfoxide  
 Abstract    Dielectric spectra have been measured up to 72 GHz at 20°C for solutions of /3-cyclodextrin (CD) in the following solvents over the whole solubility range of CD: dimethylsulfoxide (DMSO), DMSO/ I,4-dioxane mixture (2:1 molar ratio), DMSO/water mixtures (2:1 and 1:2). The spectra are analyzed into a sum of Debye type spectral components. These are likely to be caused by different physical pro-cesses. The discussion shows (i) that there is a preferential CD-DMSO interaction, by far exceeding the CD-water interaction, and (») that, concerning CD-DMSO, a loose interaction can be distinguished from the formation of an inclusion complex. 
  Reference    Z. Naturforsch. 54a, 382—386 (1999); received April 19 1999 
  Published    1999 
  Keywords    Association, Dielectric Spectroscopy, Liquids 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0382.pdf 
 Identifier    ZNA-1999-54a-0382 
 Volume    54 
2Author    S. A. Markarian, M. StockhausenRequires cookie*
 Title    Dielectric Relaxation of Diethylsulfoxide  
 Abstract    The dielectric loss spectrum of the title substance has been measured in its pure liquid state between 10 MHz and 72 GHz at 20°C. In comparison to the Debye function, it is slightly broadened towards the high frequency side. The maximum cor-responds to a relaxation time of 51 ps. In view of the molecu-lar size and viscosity, this is relatively long and thus indicative of associative intermolecular effects as in the case of the homol-ogous compound dimethylsulfoxide. 
  Reference    Z. Naturforsch. 55a, 667—668 (2000); received April 25 2000 
  Published    2000 
  Keywords    Association, Dielectric Relaxation, Liquids 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0667_n.pdf 
 Identifier    ZNA-2000-55a-0667_n 
 Volume    55 
3Author    S. A. Markarian, A. S. Galstian, M. Stockhausen3Requires cookie*
 Title    A Dielectric Relaxation Study of Diethylsulfoxide/ Tetrachloromethane Binary Mixtures  
 Abstract    The dielectric spectra o f diethylsulfoxide (DESO)/tetrachloromethane mixtures have been measured from 0.5 to 72 GHz at 20 °C. On the basis of the relation between the relaxation time and the DESO concentration a complex formation between DESO and tetrachloromethane is suggested. 
  Reference    Z. Naturforsch. 56a, 785—7 (2001); received September 27 2001 
  Published    2001 
  Keywords    Association, Dielectric Spectroscopy, Liquids 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0785.pdf 
 Identifier    ZNA-2001-56a-0785 
 Volume    56 
4Author    Reinhard Schmidt, Hans-Dieter BrauerRequires cookie*
 Title    Über das Assoziationsverhalten des Schlenkschen Kohlenwasserstoffs About the Association of S c h 1 e n k's Hydrocarbon  
  Reference    (Z. Naturforsch. 27b, 1363—1370 [1972]; eingegangen am 14. April/18. August 1972) 
  Published    1972 
  Keywords    ESR, association, Schlenks hydrocarbon 
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 TEI-XML for    default:Reihe_B/27/ZNB-1972-27b-1363.pdf 
 Identifier    ZNB-1972-27b-1363 
 Volume    27 
5Author    M. KumakuraRequires cookie*
 Title    Association of an Antibody-Conjugated Enzyme with Synthetic Polymers Dissolved in Organic Solvents  
 Abstract    A n antibody of a tumor marker (a-fetoprotein) conju­ gated with peroxidase was dispersed in organic solvents including synthetic polymers, and the interaction o f the antibody with the polymers was investigated. It was found that the antibody-conjugated enzyme is associated with the polymers dissolved in hydrophobic organic sol­ vents. The association correlated with the polym eriza­ tion degree, concentration, and nature of the polymers. 
  Reference    Z. Naturforsch. 49c, 891—8 (1994); received January 10/August 15 1994 
  Published    1994 
  Keywords    Antibody, Enzyme, Association, Polymer, Solvent 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0891_n.pdf 
 Identifier    ZNC-1994-49c-0891_n 
 Volume    49 
6Author    M. Wichmann, M. StockhausenRequires cookie*
 Abstract    Relaxation spectra have been measured at 20°C for mono-, di-and triethanolamine in the pure liquid state and in a 0.6 mole fraction mixture with 1,4-dioxane. The general resemblance to the dielectric behaviour of alcohols and aminoalcohols shows that relaxation is governed by association effects. In this regard, several features point to significantly differing behaviour of the mono compound in comparison with both di-and triethanol­ amine. 
  Reference    Z. Naturforsch. 56a, 603—604 (2001); received June 18 2001 
  Published    2001 
  Keywords    Association, Dielectric Spectroscopy, Hydrogen Bonding, Liquids 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0603_n.pdf 
 Identifier    ZNA-2001-56a-0603_n 
 Volume    56 
7Author    Stefan Zabori, Rainer Rudolph, Rainer JaenickeRequires cookie*
 Title    Folding and Association of Triose Phosphate Isomerase from Rabbit Muscle  
 Abstract    The enzymatic activity and quaternary structure o f rabbit muscle triose phosphate isomerase remains unchanged in the concentration range from 2 ng/m l to 2 ng/m l. In this concentration range the enzyme can be reactivated after dissociation and denaturation in 6.5 m guanidine hydrochloride. Removal of the denaturant by dilution and separation o f inactive wrong aggregates (5-20%) lead back to active dimers, indistinguishable from the native enzyme as far as enzymatic and physicochemical properties are concerned. Based on the long term stability o f the enzyme, the reactivation kinetics were analyzed at low concentrations and 0 °C, conditions where the association of inactive monomers to active dim ers is predom inant in the process of reactivation. The concentration dependence of the rate of reactivation and the kinetic profiles could be described by a consecutive first-order folding and second-order association reaction scheme with the rate constants k ^ = 1.9 x 10~2 s-1 and kbi = 3 x 105 m _1 • s~\ This implies that the folded monomers o f triose phosphate isomerase, which are interm ediate states during reconstitution, cannot possess appreciable enzymatic 
  Reference    Z. Naturforsch. 35c, 999—1004 (1980); received A ugust 7 1980 
  Published    1980 
  Keywords    Association, Folding, Reconstitution, Triose Phosphate Isomerase 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0999.pdf 
 Identifier    ZNC-1980-35c-0999 
 Volume    35 
8Author    H. TassoRequires cookie*
 Title    O n the Integrability of an Attracting System of N onlinear O scillators  
 Abstract    The problem o f the integrability o f a peculiar system of nonlinear oscillators is considered. W hile the case o f two oscillators is integrable, the case o f many is open. The Lax pair method is not applicable to such a system. 
  Reference    Z. Naturforsch. 42a, 1237—1238 (1987); received May 15 1987 
  Published    1987 
  Keywords    Association, G arching bei München, Federal Republic o f G erm any 
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 TEI-XML for    default:Reihe_A/42/ZNA-1987-42a-1237_n.pdf 
 Identifier    ZNA-1987-42a-1237_n 
 Volume    42