Hard Magnetic Properties and the Features of Nanostructure of High-Temperature Sm-Co-Fe-Cu-Zr Magnet with Abnormal Temperature Dependence of Coercivity.

This paper presents methods and approaches that can be used for production of Sm-Co-Fe-Cu-Zr permanent magnets with working temperatures of up to 550 °C. It is shown that the content of Sm, Cu, and Fe significantly affects the coercivity () value at high operating temperatures. A decrease in the content of Fe, which replaces Co, and an increase in the content of Sm in Sm-Co-Fe-Cu-Zr alloys lead to a decrease in value at room temperature, but significantly increase at temperatures of about 500 °C.

[Invasion of microorganisms in bronchial mucosa of liquidators of the Chernobyl accident consequences].

Bronchial bioptates of 97 liquidators of the Chernobyl accident consequences with chronic bronchitis and 23 patients of control nosological group as well as sputum (174 persons) and BAL (22 persons) of liquidators with chronic obstructive lung disease (COLD) were studied to define pathogenic role of automicroflora in the development of lung diseases. Such methods as electron microscopy, immunohistochemistry and microbiology were used. The revealed invasion of microorganisms occurred against the background of pathology of superficial bronchial epithelium with a decrease of HLA-DR and CD23 lymphocytes and increase of CD1c lymphocytes in lamina propria of bronchial mucosa of the liquidators.