Valentin Spiridonov

  • Citations Per Year
Learn More
From the roots ofOnonis arvensis L. a new isoflavone has been isolated with mp 213–214° C which has been called onogenin. On the basis of the results of a study of its UV, IR, NMR, and mass spectra, the structure of 7-hydroxy-6-methoxy-3′,4′-methylenedioxyisoflavanone is proposed for onogenin.
Application of a potassium ion sensor based on an ion sensitive field effect transistor (ISFET) for ion control of a dialysis solution in an artificial kidney and in blood plasma of patients treated by hemodialysis is presented. Sensors and their long-term stability were characterised in constant contact with test solutions. Test results are compared to(More)
Effects of acetate and bicarbonate dialysates on tolerance to dialysis have been examined in 30 patients with chronic renal failure (CRF). Symptomatic homeostatic impairment (nausea, vomiting, headache) and cardiovascular instability (tachycardia, arrhythmia, dyspnea) were less common (p less than 0.05) in bicarbonate dialysis. The cardiovascular symptoms(More)
The paper presents the finite element code LOGOS for high performance computing developed in Russian Federal Nuclear Center VNIIEF. Among other, its functionality intended to numerical analysis of quasi-static strength problems. The description of main procedures and algorithms that allow accounting both physical and geometrical non-linear effects and(More)
This paper describes the finite volume code for aerodynamic problems computer modeling. The base of the technique is explicit difference Godunov-Kolgan-Rodionov scheme. Development and testing results of calculation algorithms for 2D planar flows are described. Solutions of different problems are given and the efficiency of the developed technique is being(More)
The inflorescences of Helichrysum arenarium, family Compositae, are used as a medicinal material for the production of various pharmaceutical preparations t inctures, decoctions, extracts, and purified total preparations [1-3]. According to pharmacological tests in the pharmacology laboratory of the Khar ' kov Chemical and Pharmaceutical Scientific-Research(More)