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- Boukhvalov, D. W., et al.
(author)
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Electronic structure of a Mn-12 molecular magnet : Theory and experiment
- 2007
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In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 75:1, s. 014419-
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Journal article (peer-reviewed)abstract
- We used site-selective and element-specific resonant inelastic x-ray scattering (RIXS) to study the electronic structure and the electron interaction effects in the molecular magnet [Mn12O12(CH3COO)(16)(H2O)(4)]center dot 2CH(3)COOH center dot 4H(2)O, and compared the experimental data with the results of local spin density approximation +U electron structure calculations which include the on-site Coulomb interactions. We found a good agreement between theory and experiment for the Coulomb repulsion parameter U = 4 eV. In particular, the p-d band separation of 1.8 eV has been found from the RIXS spectra, which is in accordance with the calculations. Similarly, the positions of the peaks in the XPS spectra agree with the calculated densities of p and d states. Using the results of the electronic structure calculations, we determined the intramolecular exchange parameters, and used them for diagonalization of the Mn-12 spin Hamiltonian. The calculated exchanges gave the correct ground state with the total spin S = 10.
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- Zhdanov, V. S., et al.
(author)
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Monitoring of aortic and coronary atherosclerosis in native and non-native males of Yakutsk over 40 years
- 2007
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In: Atherosclerosis. - : Elsevier BV. - 1879-1484 .- 0021-9150. ; 190:2, s. 338-342
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Journal article (peer-reviewed)abstract
- We have analyzed the development of aortic and coronary atherosclerosis over 40 years in native and non-native males of Yakutsk by comparing the data obtained in 1963-1965, 1985-1987 and 2001-2003. The research was carried out in compliance with the WHO program for the atherosclerosis epidemiology studies using autopsy material. Subjects (361 natives and 692 non-natives) included in the research died of external causes at the age of 20-59 years and had no history of chronic diseases, which was confirmed by post-mortem examination. The prevalence and the extent of raised atherosclerotic lesions (fibrous plaques, complicated lesions and calcinosis) in the aorta and coronary arteries were determined by visual planimetry after staining with Sudan IV. An accelerated development of aortic and coronary atherosclerosis was revealed in both populations throughout the entire period of 40 years with more severe manifestations in non-native males. The severity of atherosclerosis increased considerably in native and non-native males a.-ed over 40 years. The rate of the increase in the extent of raised atherosclerotic lesions tended to be greater in native than in non-native males.
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