51 research outputs found
Unsteady rise of a bubble in a viscous fluid at small Reynolds numbers
A bubble rising from the state of rest in a viscous incompressible fluid is considered. A formula for the Basset force acting on the bubble in a viscous fluid is obtained, which differs by a multiplier from the Basset force for a solid particle. The problem of unsteady rise of a bubble is solved analytically. The bubble rise is also studied experimentally and the experimental data are compared with the theoretical results
Dynamics of bubble rising at small Reynolds numbers
Results of experimental study of a single spherical bubble rising in the non-stationary regime in a viscous liquid (with and without surfactant) at small Reynolds numbers Re<1 have been presented. Improved empirical correlations for drag coefficient of the bubble rising with and without surfactant in the stationary regime have been obtained. Influence of nonstationary effects on the dynamics of bubble rising has been analyzed
Effect of hydrophobization of airfield coatings on the consumption of deicing reagents2
The issue of reducing costs for the maintenance of airfield coatings is particularly important nowadays due to the increase in the intensity of domestic air transportation. A significant part of the costs of the operational maintenance of airfields is spent on the purchase of deicing reagents (DIR) used to protect airfield pavements from icing. There is a possibility to reduce the required amount DIR by using of hydrophobizing impregnations (HPI) for cement concrete airfield pavements. The assumption about possibility to reduce costs for DIR by using HPI was proven by laboratory tests on specimens of cement concrete slabs. In the course of laboratory tests the process of airfield pavement icing and de-icing was modeled. According to the results of experimental studies it was determined that the consumption of DIR for cement concrete slabs specimens treated with HPI was reduced by 35% compared to similar specimens without HPI treatment. For the economic evaluation of cost reduction for the purchase of DIRs, the costs of applied DIRs used at civil airfields of the Russian Federation were analyzed, taking into account their location in different climatic zones. The assessment has revealed that the cost savings for the purchase of DIRs can be up to 29.1 %
ΠΠ΅Π»ΠΊΠΎΠ²ΡΠΉ ΡΠΎΡΡΠ°Π² ΠΈ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΠΈ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ² ΠΏΡΠΈ ΡΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΈ ΠΏΠ΅ΡΠ΅Π½ΠΈ ΠΈ ΠΏΠΎΡΠΊΠΈ
Organ transplantation is an effective treatment for many end-stage diseases. However, reperfusion injury constitutes a major complication of transplantation, which is associated with microcirculatory disorders and aggregation of blood corpuscles. Red blood cells (RBC) play an essential role in maintaining hemodynamic and rheological properties of the blood. Moreover, the study of mechanisms of changes in RBC functional indices is an urgent task. The main indicator of RBC functioning is the stability of RBC membrane structure. The issue of RBC membrane modification in organ transplantation has not been studied so far. Objective: to study the protein composition of RBC membranes, their aggregation and electrokinetic parameters in liver and kidney recipients, as well as in related kidney and liver fragment donors before and after operation. Research materials. Blood of 12 kidney recipients and 5 related kidney donors, 8 liver recipients and 4 related liver fragment donors β 1β2 hours before surgery, 1 week, 1, 2, 7, 10, 12 months after surgery. The control group consisted of 8 healthy volunteers. Research methods. Protein separation was done by Laemmli electrophoresis. RBC electrophoretic mobility, which characterizes the electrokinetic properties of cells, was measured by microelectrophoresis. Aggregation was calculated microscopically by counting unaggregated RBCs. Obtained values were compared by Mann-Whitney U test. Results. Examination of the RBC membrane of kidney recipients revealed a significant decrease in the amount of Band 3 protein and glycophorin before and after transplantation. Band 3 protein levels reduced at 1 month, glycophorin reduced at 7 months after surgery, with a maximum decrease in these protein fractions by more than 50% by 7 days compared with control values. There was also a decrease in spectrin content for 2 months after surgery with a maximum decrease of 30% by 1 month. In liver recipients, analysis of RBC membrane proteins revealed a decrease in the amount of glycophorin before surgery and further decrease at 2 months of post-transplant period. The maximum decrease in this index was 72% by 7 days after surgery. In addition, there was a fall in spectrin and Band 3 protein levels at 1 month by more than 60% relative to the control values. In donors, there were changes in the protein fraction of RBC membranes in the long-term post-operative period: spectrin and Band 3 protein levels reduced by 2 times at month 2 in kidney donors, while glycophorin levels reduced by 2.3 times at month 1 after operation in liver donors. Similarly, both groups of donors had increased actin levels at month 1 after surgery. The revealed changes in protein levels in the protein phase of RBC membranes were combined with functional indices of RBCs. In kidney recipients, decreased RBC electrophoretic mobility and increased aggregation were detected at 2 months. In liver recipients, the changes in these indicators were at 1 month. A decrease in RBC electrophoretic mobility was detected in donors of both groups. Conclusion. Changes in RBC membrane electronegativity are associated with changes in glycophorin and Band 3 protein levels, whereas in RBC aggregation process in liver/kidney recipients, the structural and functional disorders in the interrelationships of such membrane proteins as spectrin, Band 3 protein, and glycophorin, are significant factors. Alteration of actin determines inhibition of RBC aggregation growth in donors.Π’ΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΡ ΠΎΡΠ³Π°Π½ΠΎΠ² ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Π»Π΅ΡΠ΅Π½ΠΈΡ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ² Ρ ΡΠ΅ΡΠΌΠΈΠ½Π°Π»ΡΠ½ΡΠΌΠΈ ΡΡΠ°Π΄ΠΈΡΠΌΠΈ ΡΡΠ΄Π° ΡΡΠΆΠ΅Π»ΡΡ
Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΠΉ. ΠΠ΄Π½Π°ΠΊΠΎ ΡΠ΅ΡΡΠ΅Π·Π½ΡΠΌ ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΠ΅ΠΌ ΠΏΡΠΈ ΡΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΈ ΡΠ²Π»ΡΡΡΡΡ ΡΠ΅ΠΏΠ΅ΡΡΡΠ·ΠΈΠΎΠ½Π½ΡΠ΅ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡ, ΠΊΠΎΡΠΎΡΡΠ΅ ΡΠ²ΡΠ·Π°Π½Ρ Ρ ΠΌΠΈΠΊΡΠΎΡΠΈΡΠΊΡΠ»ΡΡΠΎΡΠ½ΡΠΌΠΈ Π½Π°ΡΡΡΠ΅Π½ΠΈΡΠΌΠΈ ΠΈ Π°Π³ΡΠ΅Π³Π°ΡΠΈΠ΅ΠΉ ΡΠΎΡΠΌΠ΅Π½Π½ΡΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΠΊΡΠΎΠ²ΠΈ. ΠΡΠΈΡΡΠΎΡΠΈΡΡ ΠΈΠ³ΡΠ°ΡΡ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ ΡΠΎΠ»Ρ Π² ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠ°Π½ΠΈΠΈ Π³Π΅ΠΌΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΡΠ΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΊΡΠΎΠ²ΠΈ, ΠΈ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΈΡ
ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΡΠ²Π»ΡΠ΅ΡΡΡ Π°ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ Π·Π°Π΄Π°ΡΠ΅ΠΉ. ΠΡΠ½ΠΎΠ²Π½ΡΠΌ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΌ ΡΡΠ½ΠΊΡΠΈΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΡΠΈΡΡΠΎΡΠΈΡΠ° ΡΠ»ΡΠΆΠΈΡ ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΡ ΡΡΡΡΠΊΡΡΡΡ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Ρ. ΠΠΎΠΏΡΠΎΡ ΠΎ ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ ΡΡΠΈΡΡΠΎΡΠΈΡΠ°ΡΠ½ΠΎΠΉ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Ρ ΠΏΡΠΈ ΡΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΈ ΠΎΡΠ³Π°Π½ΠΎΠ² Π½Π° ΡΠ΅Π³ΠΎΠ΄Π½ΡΡΠ½ΠΈΠΉ Π΄Π΅Π½Ρ Π½Π΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½.Π¦Π΅Π»Ρ: ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π±Π΅Π»ΠΊΠΎΠ²ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° ΠΌΠ΅ΠΌΠ±ΡΠ°Π½ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ², ΠΈΡ
Π°Π³ΡΠ΅Π³Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΈ ΡΠ»Π΅ΠΊΡΡΠΎΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ Ρ ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠ΅ΡΠ΅Π½ΠΈ ΠΈ ΠΏΠΎΡΠΊΠΈ, Π° ΡΠ°ΠΊΠΆΠ΅ ΡΠΎΠ΄ΡΡΠ²Π΅Π½Π½ΡΡ
Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΠΏΠΎΡΠΊΠΈ ΠΈ ΡΡΠ°Π³ΠΌΠ΅Π½ΡΠ° ΠΏΠ΅ΡΠ΅Π½ΠΈ Π΄ΠΎ ΠΈ Π² Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ ΠΏΠΎΡΠ»Π΅ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠΈΠΎΠ΄Π°.ΠΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. ΠΡΠΎΠ²Ρ 12 ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠΎΡΠΊΠΈ, 5 ΡΠΎΠ΄ΡΡΠ²Π΅Π½Π½ΡΡ
Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΠΏΠΎΡΠΊΠΈ, 8 ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠ΅ΡΠ΅Π½ΠΈ ΠΈ 4 ΡΠΎΠ΄ΡΡΠ²Π΅Π½Π½ΡΡ
Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΡΡΠ°Π³ΠΌΠ΅Π½ΡΠ° ΠΏΠ΅ΡΠ΅Π½ΠΈ Π²ΠΎ Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ β Π·Π° 1β2 ΡΠ°ΡΠ° Π΄ΠΎ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ, ΡΠ΅ΡΠ΅Π· 1 Π½Π΅Π΄Π΅Π»Ρ, 1, 2, 7, 10, 12 ΠΌΠ΅ΡΡΡΠ΅Π² ΠΏΠΎΡΠ»Π΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ. ΠΡΡΠΏΠΏΡ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ ΡΠΎΡΡΠ°Π²ΠΈΠ»ΠΈ 8 Π·Π΄ΠΎΡΠΎΠ²ΡΡ
Π΄ΠΎΠ±ΡΠΎΠ²ΠΎΠ»ΡΡΠ΅Π².ΠΠ΅ΡΠΎΠ΄Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. Π Π°Π·Π΄Π΅Π»Π΅Π½ΠΈΠ΅ Π±Π΅Π»ΠΊΠΎΠ² ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΎΡΠΎΡΠ΅Π·Π° ΠΏΠΎ ΠΡΠΌΠΌΠ»ΠΈ. ΠΠ»Π΅ΠΊΡΡΠΎΡΠΎΡΠ΅ΡΠΈΡΠ΅ΡΠΊΡΡ ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½ΠΎΡΡΡ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ², Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΡΡΡΡ ΡΠ»Π΅ΠΊΡΡΠΎΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΊΠ»Π΅ΡΠΎΠΊ, ΠΈΠ·ΠΌΠ΅ΡΡΠ»ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΌΠΈΠΊΡΠΎΡΠ»Π΅ΠΊΡΡΠΎΡΠΎΡΠ΅Π·Π°. ΠΠ³ΡΠ΅Π³Π°ΡΠΈΡ ΡΠ°ΡΡΡΠΈΡΡΠ²Π°Π»ΠΈ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΈ, ΠΏΡΡΠ΅ΠΌ ΠΏΠΎΠ΄ΡΡΠ΅ΡΠ° Π½Π΅Π°Π³ΡΠ΅Π³ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ². Π‘ΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
Π²Π΅Π»ΠΈΡΠΈΠ½ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈ ΠΏΠΎ U-ΠΊΡΠΈΡΠ΅ΡΠΈΡ ΠΠ°Π½Π½Π°βΠ£ΠΈΡΠ½ΠΈ.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Ρ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ² ΠΊΡΠΎΠ²ΠΈ ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠΎΡΠΊΠΈ Π²ΡΡΠ²ΠΈΠ»ΠΎ Π·Π½Π°ΡΠΈΠΌΠΎΠ΅ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° Π±Π΅Π»ΠΊΠ° ΠΏΠΎΠ»ΠΎΡΡ 3 ΠΈ Π³Π»ΠΈΠΊΠΎΡΠΎΡΠΈΠ½Π° Π΄ΠΎ ΠΈ ΠΏΠΎΡΠ»Π΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΈ. Π£ΡΠΎΠ²Π΅Π½Ρ Π±Π΅Π»ΠΊΠ° ΠΏΠΎΠ»ΠΎΡΡ 3 Π±ΡΠ» ΡΠ½ΠΈΠΆΠ΅Π½ Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 1 ΠΌΠ΅ΡΡΡΠ°, Π³Π»ΠΈΠΊΠΎΡΠΎΡΠΈΠ½Π° β Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 7 ΠΌΠ΅ΡΡΡΠ΅Π² ΠΏΠΎΡΠ»Π΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ Ρ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΡΠΌ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ΠΌ Π΄Π°Π½Π½ΡΡ
ΡΡΠ°ΠΊΡΠΈΠΉ Π±Π΅Π»ΠΊΠΎΠ² Π±ΠΎΠ»Π΅Π΅ ΡΠ΅ΠΌ Π½Π° 50% ΠΊ 7-ΠΌ ΡΡΡΠΊΠ°ΠΌ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ. Π’Π°ΠΊΠΆΠ΅ ΡΠ΅Π³ΠΈΡΡΡΠΈΡΠΎΠ²Π°Π»ΠΎΡΡ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ ΡΠΏΠ΅ΠΊΡΡΠΈΠ½Π° Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 2 ΠΌΠ΅ΡΡΡΠ΅Π² ΠΏΠΎΡΠ»Π΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ Ρ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΡΠΌ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ΠΌ Π½Π° 30% ΠΊ 1 ΠΌΠ΅ΡΡΡΡ. Π£ ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠ΅ΡΠ΅Π½ΠΈ Π°Π½Π°Π»ΠΈΠ· Π±Π΅Π»ΠΊΠΎΠ² ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Ρ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ² Π²ΡΡΠ²ΠΈΠ» ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° Π³Π»ΠΈΠΊΠΎΡΠΎΡΠΈΠ½Π° Π΄ΠΎ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ ΠΈ Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠ΅Π΅ Π΅Π³ΠΎ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 2 ΠΌΠ΅ΡΡΡΠ΅Π² ΠΏΠΎΡΡΡΡΠ°ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠΈΠΎΠ΄Π°. ΠΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ΅ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Ρ β Π½Π° 72% β Π±ΡΠ»ΠΎ ΠΎΡΠΌΠ΅ΡΠ΅Π½ΠΎ ΠΊ 7-ΠΌ ΡΡΡΠΊΠ°ΠΌ ΠΏΠΎΡΠ»Π΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ. ΠΡΠΎΠΌΠ΅ ΡΠΎΠ³ΠΎ, Π½Π°Π±Π»ΡΠ΄Π°Π»ΠΎΡΡ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° ΡΠΏΠ΅ΠΊΡΡΠΈΠ½Π° ΠΈ Π±Π΅Π»ΠΊΠ° ΠΏΠΎΠ»ΠΎΡΡ 3 Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 1 ΠΌΠ΅ΡΡΡΠ° Π±ΠΎΠ»Π΅Π΅ ΡΠ΅ΠΌ Π½Π° 60% ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ. Π£ Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π² Π±Π΅Π»ΠΊΠΎΠ²ΠΎΠΉ ΡΡΠ°ΠΊΡΠΈΠΈ ΡΡΠΈΡΡΠΎΡΠΈΡΠ°ΡΠ½ΡΡ
ΠΌΠ΅ΠΌΠ±ΡΠ°Π½ ΡΠ΅Π³ΠΈΡΡΡΠΈΡΠΎΠ²Π°Π»ΠΈΡΡ Π² ΠΎΡΠ΄Π°Π»Π΅Π½Π½ΡΠΉ ΠΏΠ΅ΡΠΈΠΎΠ΄ ΠΏΠΎΡΠ»Π΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ: Ρ Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΠΏΠΎΡΠΊΠΈ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ Π² 2 ΡΠ°Π·Π° ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° ΡΠΏΠ΅ΠΊΡΡΠΈΠ½Π° ΠΈ Π±Π΅Π»ΠΊΠ° ΠΏΠΎΠ»ΠΎΡΡ 3 ΠΎΡΠΌΠ΅ΡΠ°Π»ΠΎΡΡ Π½Π° 2-ΠΉ ΠΌΠ΅ΡΡΡ, Ρ Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΠΏΠ΅ΡΠ΅Π½ΠΈ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ Π³Π»ΠΈΠΊΠΎΡΠΎΡΠΈΠ½Π° Π² 2,3 ΡΠ°Π·Π° β ΠΊ 1-ΠΌΡ ΠΌΠ΅ΡΡΡΡ ΠΏΠΎΡΠ»Π΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ. Π’Π°ΠΊΠΆΠ΅ Π² ΠΎΠ±Π΅ΠΈΡ
Π³ΡΡΠΏΠΏΠ°Ρ
Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΡΠ΅Π³ΠΈΡΡΡΠΈΡΠΎΠ²Π°Π»ΡΡ ΡΠΎΡΡ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π°ΠΊΡΠΈΠ½Π° ΠΊ 1-ΠΌΡ ΠΌΠ΅ΡΡΡΡ ΠΏΠΎΡΠ»Π΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ. ΠΡΡΠ²Π»Π΅Π½Π½ΡΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° Π±Π΅Π»ΠΊΠΎΠ² Π² Π±Π΅Π»ΠΊΠΎΠ²ΠΎΠΉ ΡΠ°Π·Π΅ ΡΡΠΈΡΡΠΎΡΠΈΡΠ°ΡΠ½ΡΡ
ΠΌΠ΅ΠΌΠ±ΡΠ°Π½ ΡΠΎΡΠ΅ΡΠ°Π»ΠΈΡΡ Ρ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠΌΠΈ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΡΠΌΠΈ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ². Π£ ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠΎΡΠΊΠΈ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ ΠΠ€ΠΠ ΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ Π°Π³ΡΠ΅Π³Π°ΡΠΈΠΈ Π½Π°Π±Π»ΡΠ΄Π°Π»ΠΎΡΡ Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 2 ΠΌΠ΅ΡΡΡΠ΅Π², Ρ ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠ΅ΡΠ΅Π½ΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π΄Π°Π½Π½ΡΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ Π·Π°ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½Ρ Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ 1 ΠΌΠ΅ΡΡΡΠ°. Π£ Π΄ΠΎΠ½ΠΎΡΠΎΠ² ΠΎΠ±Π΅ΠΈΡ
Π³ΡΡΠΏΠΏ Π±ΡΠ»ΠΎ Π²ΡΡΠ²Π»Π΅Π½ΠΎ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ ΠΠ€ΠΠ.ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. Π‘ΠΎΠ²ΠΎΠΊΡΠΏΠ½ΠΎΡΡΡ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ² ΠΏΠΎΠΊΠ°Π·Π°Π»Π°, ΡΡΠΎ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠ»Π΅ΠΊΡΡΠΎΠΎΡΡΠΈΡΠ°ΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ² ΡΠΎΠΏΡΡΠΆΠ΅Π½ΠΎ Ρ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Π³Π»ΠΈΠΊΠΎΡΠΎΡΠΈΠ½Π° ΠΈ Π±Π΅Π»ΠΊΠ° ΠΏΠΎΠ»ΠΎΡΡ 3, ΡΠΎΠ³Π΄Π° ΠΊΠ°ΠΊ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ Π°Π³ΡΠ΅Π³Π°ΡΠΈΠΈ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ² Ρ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ² ΠΏΠΎΡΠ»Π΅ ΡΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΈ ΠΏΠ΅ΡΠ΅Π½ΠΈ/ΠΏΠΎΡΠΊΠΈ Π·Π½Π°ΡΠΈΠΌΡΠΌΠΈ ΡΠ°ΠΊΡΠΎΡΠ°ΠΌΠΈ ΡΠ²Π»ΡΡΡΡΡ ΡΡΡΡΠΊΡΡΡΠ½ΠΎ-ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ Π²Π·Π°ΠΈΠΌΠΎΡΠ²ΡΠ·Π΅ΠΉ ΡΠ°ΠΊΠΈΡ
ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Π½ΡΡ
Π±Π΅Π»ΠΊΠΎΠ², ΠΊΠ°ΠΊ ΡΠΏΠ΅ΠΊΡΡΠΈΠ½, Π±Π΅Π»ΠΎΠΊ ΠΏΠΎΠ»ΠΎΡΡ 3, Π³Π»ΠΈΠΊΠΎΡΠΎΡΠΈΠ½. ΠΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π°ΠΊΡΠΈΠ½Π° ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅Ρ ΡΠ΄Π΅ΡΠΆΠΈΠ²Π°Π½ΠΈΠ΅ ΡΠΎΡΡΠ° Π°Π³ΡΠ΅Π³Π°ΡΠΈΠΈ ΡΡΠΈΡΡΠΎΡΠΈΡΠΎΠ² Ρ Π΄ΠΎΠ½ΠΎΡΠΎΠ²
Β«Π‘ΠΠΠΠ ΠΠ ΠΠΠΠ ΠΠΠ«ΠΠΠΠΠ―Β» Π‘ΠΠΠΠΠΠΠΠ§ΠΠΠ ΠΠ Π’ΠΠ ΠΠΠ ΠΠΠ‘ΠΠ ΠΠ Π’ΠΠ’ΠΠΠΠ§ΠΠ‘ΠΠΠ Π’Π ΠΠΠ‘ΠΠΠΠΠ’ΠΠ¦ΠΠ ΠΠΠ§ΠΠΠ
Splenic artery steal syndrome is one of possible arterial complications after orthotopic liver transplantation. Material includes personal experience in diagnostics and treatment of this syndrome. In each case complication was opportunely suspected basing on laboratory and ultrasound data and proved by angiography. Successful treatment was performed using different variants of splenic artery embolization.Β ΠΠ΄Π½ΠΈΠΌ ΠΈΠ· Π²Π°ΡΠΈΠ°Π½ΡΠΎΠ² Π°ΡΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΠΉ ΠΏΠΎΡΠ»Π΅ ΠΎΡΡΠΎΡΠΎΠΏΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΈ ΠΏΠ΅ΡΠ΅Π½ΠΈ ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠΈΠ½Π΄ΡΠΎΠΌ ΠΎΠ±ΠΊΡΠ°Π΄ΡΠ²Π°Π½ΠΈΡ ΡΠ΅Π»Π΅Π·Π΅Π½ΠΎΡΠ½ΠΎΠΉ Π°ΡΡΠ΅ΡΠΈΠΈ. Π ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΡΠΉ ΠΎΠΏΡΡ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈ- ΠΊΠΈ ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΡ ΡΡΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ. Π ΠΊΠ°ΠΆΠ΄ΠΎΠΌ Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΠΈ ΡΠ΄Π°Π»ΠΎΡΡ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ ΡΠ²ΠΎΠ΅Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎ Π·Π°ΠΏΠΎΠ΄ΠΎΠ·ΡΠΈΡΡ ΠΏΠ°- ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠΈΠ½Π΄ΡΠΎΠΌ Π½Π° ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠΈ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΠΈ Π»Π°Π±ΠΎΡΠ°ΡΠΎΡΠ½ΡΡ
Π΄Π°Π½Π½ΡΡ
ΠΈ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠ΄ΠΈΡΡ Π΄ΠΈΠ°Π³Π½ΠΎΠ· ΠΏΡΠΈ Π°Π½Π³ΠΈΠΎΠ³ΡΠ°ΡΠΈΠΈ. Π£ΡΠΏΠ΅ΡΠ½Π°Ρ ΠΊΠΎΡΡΠ΅ΠΊΡΠΈΡ Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π° ΠΏΡΡΠ΅ΠΌ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
Π²Π°ΡΠΈΠ°Π½ΡΠΎΠ² ΡΠΌΠ±ΠΎΠ»ΠΈΠ·Π°ΡΠΈΠΈ ΡΠ΅Π»Π΅Π·Π΅Π½ΠΎΡ- Π½ΠΎΠΉ Π°ΡΡΠ΅ΡΠΈΠΈ.
Unsteady rise of a bubble in a viscous fluid at small Reynolds numbers
A bubble rising from the state of rest in a viscous incompressible fluid is considered. A formula for the Basset force acting on the bubble in a viscous fluid is obtained, which differs by a multiplier from the Basset force for a solid particle. The problem of unsteady rise of a bubble is solved analytically. The bubble rise is also studied experimentally and the experimental data are compared with the theoretical results
Dynamics of bubble rising at small Reynolds numbers
Results of experimental study of a single spherical bubble rising in the non-stationary regime in a viscous liquid (with and without surfactant) at small Reynolds numbers Re<1 have been presented. Improved empirical correlations for drag coefficient of the bubble rising with and without surfactant in the stationary regime have been obtained. Influence of nonstationary effects on the dynamics of bubble rising has been analyzed
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