Interactions of quantum dots with donor blood erythrocytes in vitro.

The effects of quantum dots CdSe/ZnS-mercaptopropionic acid, (CdSe/CdZnS)ZnS-polyT, and CdSeCdSZnS/polyT/SiO2-NH2 on human erythrocytes were studied. The nanomaterials reduced signifi cantly the erythrocyte sedimentation rate and modified the erythrocyte membrane resistance to induced (acid and hypo-osmotic) hemolysis. Evaluation of the erythrocyte morphology by atomic force microscopy in the control and after exposure to quantum dots showed significant differences in erythrocyte size and changes in their morphology as a result of exposure to the nanomaterials.

[Dentin surface morphology changes after applying pastes with calcium hydroxyapatite or nanohydroxyapatite].

This study presents the results of an experimental use of pastes with hydroxyapatite and with nanohydroxyapatite to compare the effect of occlusion of dentinal tubules. When performing work we estimated the morphological changes of the dentin surface using scanning electron and atomic force microscopy. The detailed assessment of dentin structural features under significant amplification it was possible to identify differences in plugging dentin tubules by different kinds of pastes.

[Comparative morphofunctional description of planar rafts and caveolae].

Recently, redefining of the role of the membrane lipids and the formation of a new look at the morphology, organization and functioning of membranes occurred due to the study of specific membrane clusters--rafts. The present review summarizes the current data concerning the morphology, the biophysical and biochemical properties of rafts, describes the structure, form and basic functional microdomains marking proteins.

[Ultramicroscopic evaluation of teeth enamel de- and remineralization].

The paper presents the results of scanning electronic microscopy evaluation of teeth enamel surface. The method allows studying objects at huge magnification and without preliminary preparation. Research was conducted in vitro on extracted teeth.

[Use of monoclonal antibodies to tumor necrosis factor (remicade) in rheumatoid arthritis: preliminary results].

Aim: To study effectiveness and tolerance of monoclonal antibodies to tumor necrosis factor (the drug remicade) in patients with rheumatoid arthritis (RA).

Material And Methods: Remicade treatment results are considered for 25 RA patients receiving methotrexate the activity of which was inadequate for these patients. Remicade was infused intravenously in a dose 200 mg 4 times for 22 weeks.