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2001 (1)
1999 (1)
1Author    Halil Oturak, Adnan Sağlam, Semiha BahçeliRequires cookie*
 Title    /-Modulation in ID NMR l H Spectrum of Taurine and Aspartate Using Spin-Echo Technique  
 Abstract    This study reports on a theoretical calculation of Hahn's spin-echo experiment in case of a model A 2 Bt spin system with a strongly coupling character and gives the experimental results of one-dimen-sion n H high-resolution NMR spectra of taurine and aspartate. The calculated amplitudes of the spin-echoes for two different proton groups of taurine are given. Using results of our calculations for tau-rine, the computer simulations of /-modulation are implemented. It is shown that the agreement be-tween the experimental and simulated spectra is good. 
  Reference    Z. Naturforsch. 54a, 305—310 (1999); received February 24 1999 
  Published    1999 
  Keywords    NMR, Amino Acids, A 2 B 2 System, /-modulation 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0305.pdf 
 Identifier    ZNA-1999-54a-0305 
 Volume    54 
2Author    P. K. Bhatia, B. S. BhadauriaRequires cookie*
 Title    Effect of Low-Frequency Modulation on Thermal Convection Instability  
 Abstract    The stability of a horizontal layer of fluid heated from below is examined when, in addition to a steady temperature difference between the horizontal walls of the layer a time-dependent low-frequency per­ turbation is applied to the wall temperatures. An asymptotic solution is obtained which describes the be­ haviour of infinitesimal disturbances to this configuration. Possible stability criteria are analyzed and the results are compared with the known experimental as well as numerical results. 
  Reference    Z. Naturforsch. 56a, 509 (2001); received February 26 2001 
  Published    2001 
  Keywords    Thermal Convection, Modulation, Rayleigh Number, Instability 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0509.pdf 
 Identifier    ZNA-2001-56a-0509 
 Volume    56