Effect of nanodisperse powders on the spreading and crystallization of a metal drop on a porous substrate.

The influence of modifying nanopowders on the spreading and crystallization of a nickel droplet on a porous steel substrate is analyzed. For this purpose, a model has been developed for the spreading of a drop of liquid metal after its high-speed collision with a heated porous substrate. Due to the high impact velocity, the process of metal crystallization is considered after the complete spreading of the drop using the model of heterogeneous nucleation and macroscopic growth of the solid phase, taking into account the size and capillary effects. The influence of the impact velocity and substrate porosity on the thickness and diameter of the formed splat, the penetration depth, and the volume of liquid that penetrated the substrate has been studied. The numerical study of heterogeneous crystallization of a metal drop has made it possible to evaluate the influence of the modifying nanoparticle parameters, the impact velocity, and substrate porosity on the heterogeneous nucleation and on the resulting splat macrostructure.

[The placing of a distal splenorenal anastomosis in liver cirrhosis patients]. / Nalozhenie distal'nogo splenorenal'nogo anastomoza u bol'nykh s tsirrozom pecheni.

The results of treatment of 79 patients with hepatic cirrhosis and different manifestations of portal hypertension, who had a distal splenorenal anastomosis been created, were studied. The features of hepatic failure after the operation were noted in 37 (46.8%) patients. Of them; 18 died. Within a five-year period, 56.4% of the patients are alive. The lifetime was the shortest in patients with ascites which developed after bleeding from the esophageal and gastric varices. The authors stress the importance of the development of criteria for evaluation of risk factors and efficacy of the operation.

[The surgical treatment of chronic hepatitis and liver cirrhosis at the compensation stage]. / Khirurgicheskoe lechenie khronicheskogo gepatita i tsirroza pecheni v stadii kompensatsii.

The authors have analysed the results of operative treatment of 120 patients with chronic hepatitis and liver cirrhosis at the stage of compensation. Periarterial nervectomy of the common hepatic artery was performed in 30 patients, extraperitonealization of the right hepatic lobe with laser irradiation--in 42, periarterial nervectomy of the common hepatic artery with extraperitonealization of the right hepatic lobe and laser irradiation--in 48. The results of periarterial nervectomy of the common hepatic artery with extraperitonealization of the right hepatic lobe and use of laser irradiation were the best.