Mssbauer study of Се2Fe17 compound in different magnetic states

Mssbauer spectra of two samples of the Ce2Fe17 compound have been analyzed and hyperfine parameters, compared. The samples were subjected to different preparation techniques and display different magnetic properties. It is established that to well fit the Mssbauer spectra of these samples, an appropriate model should be used that takes into account an additional subspectrum differing in hyperfine parameters from the subspectra employed in conventional models. It is shown that in the ferromagnetic state, the samples contain local regions with an antiferromagnetic order, the volume fraction of which, being different for two samples, increases on approaching the temperature of ferro-to-antiferromagnet transition

MELATONIN ATTENUATES THE STRESS-INDUCED DISORDERS IN PARODONTIUM AND LIVER

The results of investigation illustrate the lipid peroxidation activation in different tissues under the stress influence. The obtained results convince the different resistance of animals to stress. The decrease of free and bound oxyprolin content, as well as glycosaminoglycans, which are the main components of connective tissue of gingiva, after prolonged stress has been established. Stress causes the development of structural and functional disorders in the liver tissue. Melatonin is effective to inhibit the stress-induced changes in liver and parodontium. The higher efficiency of melatonin at the dose 1,0 mg/kg over 0,2 mg/kg was established. The obtained results open the prospects of the using of melatonin and its artificial analogues for pharmacological treatment of stress-induced disorders in parodontium and liver

Mssbauer study of Се2Fe17 compound in different magnetic states

Mssbauer spectra of two samples of the Ce2Fe17 compound have been analyzed and hyperfine parameters, compared. The samples were subjected to different preparation techniques and display different magnetic properties. It is established that to well fit the Mssbauer spectra of these samples, an appropriate model should be used that takes into account an additional subspectrum differing in hyperfine parameters from the subspectra employed in conventional models. It is shown that in the ferromagnetic state, the samples contain local regions with an antiferromagnetic order, the volume fraction of which, being different for two samples, increases on approaching the temperature of ferro-to-antiferromagnet transition