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'Mössbauer spectroscopy' in keywords Facet   Publication Year 2000  [X]
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1Author    M. I. Oshtrakh, O. B. Milder, V. A. Semionkin, A. L. Berkovsky, M. A. Azhigirova, E. P. VyazovaRequires cookie*
 Title    Variation of Quadrupole Splitting in Modified Oxyhemoglobin: A Mössbauer Effect Study  
 Abstract    Human adult hemoglobin modified by both pyridoxal-5'-phosphate and glutaraldehyde in the oxy-form was studied by Mössbauer spectroscopy. Mössbauer spectra were measured at 87 and 295 K (hemoglobin in lyophilized form) and at 87 K (hemoglobin in frozen solution). The values of the quadrupole splitting for modified oxyhemoglobin were found to be lower then those of oxyhemoglobin without modifications in lyophilized form and frozen solution, respectively. The Mössbauer spectra of modified oxyhemoglobin were also analyzed in terms of the heme iron inequivalence in a-and /3-subunits of the tetramer. Differences of the tendencies of temperature dependencies of quadrupole splitting for modified and non-modified oxyhemoglobin in lyophilized form were shown. 
  Reference    Z. Naturforsch. 55a, 193—198 (2000); received September 11 1999 
  Published    2000 
  Keywords    Hemoglobin, Mössbauer Spectroscopy, Quadrupole Spitting 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0193.pdf 
 Identifier    ZNA-2000-55a-0193 
 Volume    55 
2Author    M. I. Oshtrakh, V. A. Semionkin, O. B. Milder, A. B. Livshits, A. A. KozlovRequires cookie*
 Title    Quadrupole Splitting and Paramagnetic Iron Core Structure in Iron-Dextran Complexes: A Mössbauer Effect Study  
 Abstract    The pharmaceutical^ important iron-dextran complexes (ferritin models) were studied by Mössbauer spectroscopy in frozen solution at 87 K and in lyophilized form at 297 and 87 K. The quadrupole splittings of the lyophilized forms of iron-dextran complexes measured at 297 and 87 K were slightly different. The quadrupole splittings of several complexes in lyophilized form and frozen solutions measured at 87 K were also different. Slight differences in the quadrupole split-ting were found for various iron-dextran complexes. Mössbauer spectra of iron-dextran complexes were better fitted using two quadrupole split doublets. Slight differences in the corresponding quadrupole splittings and doublet ratios were observed for various complexes. 
  Reference    Z. Naturforsch. 55a, 186—192 (2000); received September 11 1999 
  Published    2000 
  Keywords    Iron-dextran Complexes, Mössbauer Spectroscopy, Paramagnetic Iron Core, Quadrupole Splitting 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0186.pdf 
 Identifier    ZNA-2000-55a-0186 
 Volume    55