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'DNP' in keywords
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2000 (1)
1997 (1)
1Author    İsmail Sert, M. Maral Sünnetçioglu, Rıza Sungur, Gökçe BingölRequires cookie*
 Title    Dynamic Nuclear Polarization Studies of TANOL/water-glycerol Solutions  
 Abstract    Dynamic Nuclear Polarization (DNP) studies of TANOL/water-glycerol solutions were per-formed at 1.53 mT. The samples have either various water-glycerol ratios at constant concen-tration or various concentrations at a constant water-glycerol ratio. The low field EPR spectra were recorded, the DNP parameters(enhancement factors, coupling constant, leakage factor) were determined, electronic relaxation times were measured. Depending on the values obtained, the interactions between nuclei and electrons are discussed. 
  Reference    Z. Naturforsch. 55a, 682—686 (2000); received April 19 2000 
  Published    2000 
  Keywords    DNP, EPR, Relaxation, Nitroxides 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0682.pdf 
 Identifier    ZNA-2000-55a-0682 
 Volume    55 
2Author    N. Horasan, M. M. Sünnetçioğlu, R. Sungur, G. BingölRequires cookie*
 Title    A Weak Field EPR Study of TANOL in Water and Water-Oil Using Dynamic Nuclear Polarization  
 Abstract    Solutions of 4-hydroxy-TEMPO(TANOL) in water and water-soyabean oil were investigated in the concentration range 0.1 mM-10mM. Dynamic nuclear polarization (DNP) and electronic relaxation time T le measurements were performed at each well resolved hyperfine line. In the TANOL/water-soyabean oil solutions, the effect of the presence of soyabean oil was an increase in the measured relaxation rates and a decrease in the observed enhancements. In addition, the observed enhancements diminished in time. For all of the samples, the relaxation rates decreased as the frequency of the transition increased. 
  Reference    Z. Naturforsch. 52a, 485—489 (1997); received January 29 1997 
  Published    1997 
  Keywords    DNP, EPR, Nitroxides, Electronic relaxation times, Water-Oil 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0485.pdf 
 Identifier    ZNA-1997-52a-0485 
 Volume    52