Authors:M. Oshtrakh, E. Kopelyan, and V. Semionkin
Structural modifications of human adult oxyhemoglobin in concentrated solution were studied by Mössbauer and positron life-time spectroscopies. The effects of non-sterile degradation and irradiation by -rays were compared by both techniques. It was found that positron annihilation parameters were sensitive to the structural modifications of hemoglobin molecules in solution and could be related with the conformational states of hemoglobin.
Authors:M. Oshtrakh, E. Kopelyan, V. Semionkin, A. Livshits, and A. Kozlov
The microstructural peculiarities of pharmaceutically important iron-dextran complexes were studied by Mössbauer and positron annihilation techniques. The results of Mössbauer spectroscopy showed variations of the iron cores in iron-dextran complexes containing different forms of FeOOH and different electronic and magnetic states of iron. The results of angular correlations of annihilation radiation and positron life-time spectroscopies showed microstructural variations of the dextran shell of the iron-dextran complexes.