[Total endoprosthetic hip replacement in patients with protrusive acetabulum bottom defect].

Total endoprosthetic hip replacement was performed in 39 patients with femoral head protrusion. The necessity of acetabulum defect infilling is proved. For the purpose of it the ground allobone transplant was impacted using the originally constructed impactor.

[Inward rectifier potassium current in the frog embryonic skeletal myocytes].

Pharmacological and kinetic properties of the inward rectifier potassium current Iir the frog embryonic skeletal myocytes were found to be identical to those of adult frog skeletal muscle fibres. The data obtained suggest that the Iir plays the main role in maintaining the myocytes resting membrane potential (RMP) when chloride conductance is insignificant. Changes of the integral conductance Gir and the RMP values correlated with the T-system development.

[Structural differentiation of dissociated skeletal embryonal myocytes of frog under conditions of cell culture].

The development of membrane structures, providing E-C coupling, and the contractile apparatus organization were investigated in frog skeletal myocytes cultured for 1 to 10 days in conditions preventing both myocyte division and fusion. Ruthenium red was used to determine the membranous structures being in contact with the extracellular environment. The marked membrane structures (vesicles and short tubules) appeared to be near the cell membrane on the first days of culturing.