Modern analytical methods (optical and electron microscopy, X-ray microanalysis) were used to study the unique samples of sulfide ores from Norilsk ore field Mining Museum collections Saint Petersburg University. Samples containing rare minerals silver platinum-group metals (sobolevskite, urvantsevite, sperrylite, argentopentlandite, froodite, kotulskite, others) studied. The chemical compositi...

This work deals with the influence of gallium addition on constitution and formation phases in Al-rich corner Al–Mn system during casting. binary ternary Al–Mn–Ga alloys were cast into a copper mould cavity diameter 5 mm. The microstructures produced characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, backscatter diffraction diffraction. characterization reveale...

In this study, the effect of the acetone extract of Arctotis arctotoides (L.f.) O. Hoffm. (Asteraceae) on the growth and ultrastructure of some opportunistic fungi associated with HIV/AIDS was analyzed by means of scanning electron microscope (SEM). Remarkable morphological alterations in the fungal mycelia which were attributed to the loss of cell wall strength ranged from loss of turgidity an...

Carisolv method is a minimally invasive treatment of carious lesions which may improve patient collaboration and allow care of minimal dental cavities, especially in young people. The aim of this study was to compare H3PO4 and Carisolv in vitro treatments of human dentin applying microradiography, SEM examination and X-ray microanalysis to evaluate the capacity of these products to clean dentin...

The authors investigated the physical role of the airway epithelium in response to changes in the airway surface fluid's composition by superperfusing the lumen with nonisotonic solutions. Morphological studies and measurements of changes in ion content in the underlying connective tissue (CT) were carried out. The study used an experimental model of isolated rat trachea. The trachea was mounte...