A method for selecting drugs that affect the rheological properties of the blood in vitro

For the selection of compounds affecting the hemorrheologic status a method for reproducing disorders of blood rheologic properties in vitro was developed. It consists in 60-min incubation of blood at 42 degrees C. The hemorrheologic effect of quercetin under such conditions was studied and a dependence of the effect of quercetin on blood viscosity and red cell aggregation on the drug concentration was revealed.     

Corrosion-fatigue endurance of 09G2S steel with an allowance made for cathodic protection

Translated from Fiziko-Khimicheskaya Mekhanika Matrialov, Vol. 25, No. 3, pp. 101–102, May–June, 1989.     

Metabolic control and metabolic capacity: two aspects of creatine kinase functioning in the cells

In this short review, the merits and limits of three theoretical concepts explaining the functional role of the creatine kinase system in muscle and brain cells are analysed. In addition to the usual concept of an energy buffer system and the recently proposed metabolic capacity theory (Sweeney, H.L. (1994) Med. Sci. Sports Exerc. 26, 30-36), it is proposed that coupled creatine kinase systems are involved in effective metabolic regulation of energy fluxes and oxidative phosphorylation, beside their energy transfer function. This aspect of the system is considered on the basis of metabolic control analysis. It is shown by using the results of mathematical modelling that, due to amplification of ADP fluxes from the cytoplasm by the mechanism of metabolic channelling, coupled mitochondrial creatine kinase may exert a flux control coefficient significantly exceeding 1.     

Reoperations of the extrahepatic bile ducts

The results of reoperations on the extrahepatic bile ducts in 82 patient s performed, mainly, for undetected and uncorrigated changes in the extrahepatic bile ducts caused by diagnostic, tactical and technical errors made during the first operation are presented.     

An Apparatus for Measuring the Electric Conductivity and Thermal EMF of Semiconductors and Their Melts

An apparatus for investigating the thermoelectric characteristics of semiconductors and chemically corrosive semiconductor melts inclined to evaporation and decomposition in a wide temperature range of 300–1300 K is developed and constructed. In contrast to the devices used earlier for this purpose, the electric conductivity and thermal emf are measured in hermetically sealed autoclaves, which, after being evacuated to a pressure of 1.33 × 10^–2 Pa, are filled with spectrally pure argon for preventing the oxidation, evaporation, or decomposition of the substance under study. The errors of the electric-conductivity and thermal-emf measurements at 1000 K do not exceed 4 and 6%, respectively.     

Modification of tribological properties of polyarylate by supercritical fluid impregnation of copper(II) hexafluoroacetylacetonate

Polyarylate has been used as a model polymer to study its tribological property alteration during impregnation of copper(II) hexafluoroacetylacetonate in a supercritical carbon dioxide environment followed by thermal decomposition of the copper compound in air. The initial, impregnated and thermally treated polymer samples were tested by various tribological techniques to compare their wear resistance, friction coefficient f_k and surface microhardness H. SEM, EDX and ESCA have been applied to determine surface and internal domain morphology, profiles of copper complex concentration, its types and influence on the tribological properties of the samples. Dramatic surface layer modification and significant enhancement of its wear resistance (more than 400%) due to this process have been observed and discussed. This revised version was published online in June 2006 with corrections to the Cover Date.