Formation of the fused system 5H,7H-pyrido[2,3-b:6,5-b′]diindole from 3-arylidene-2-ethoxyindolenines and hydrazine hydrate

Three 12-aryl-5H,7H-pyrido[2,3-b:6,5-b??]diindoles (Ar = Ph, 4-BrC₆H₄, and 4-MeOC₆H₄) were obtained from appropriate 3-arylidene-2-ethoxyindolenines and hydrazine hydrate.     

Use of galvanostatic coulometry in the analysis of arbidol drug

Arbidol is proved to easily and completely react with electrogenerated bromine in the ratio 2: 9; so procedures for the arbidol quantification in the neat substance and drugs are developed, the RSD value does not exceed 2%. A procedure for the coulometric determination of water in the arbidol substance using the Fisher method is proposed.     

Synthesis and biological activity of dialkylamino-substituted phosphine oxides

A series of dialkylamino-substituted phosphine oxides was synthesized and their physiological activity was studied.     

Intermolecular interactions of polymethacrylic acid with nonylphenoxypoly(ethoxy)ethanol in water solutions

On the basis of concentration pH dependences of binary solutions of anionic polyelectrolyte, polymethacrylic acid, and nonionic surfactant, nonylphenoxypoly(ethoxy)ethanol the role of hydrophobic interaction in the development of associative and aggregative processes was shown. It is established that the criterion of evaluation of the preferred contribution of hydrophobic interaction is the inflection point on the dependence of pH difference of the individual solutions of nonylphenoxypoly(ethoxy)ethanol and binary solutions of polymethacrylic acid and nonylphenoxypoly(ehoxy)ethanol on the logarithm of ratio of their concentrations.     

Synthesizing of silver nanoparticles by thermal implantation of its ions in ED-20 epoxy oligomer

Stable silver particles of 39 nm in diameter were synthesized by the thermal implantation of its ions in ED-20 epoxy oligomer.     

Pyrolysis of polystyrene in coal tar and ethylene tar pitches

Pyrolysis of polystyrene in the medium of coal tar pitch and of pitch prepared from ethylene production tar was performed in the temperature range 360–420°C at atmospheric pressure.     

Varying surface morfology of oxide-carbonate ores in the synthesis of an adsorbent catalyst

Investigation of the surface morphology of oxide-carbonate manganese ore and dolomite and also adsorbent catalyst samples synthesized on their basis showed that heat treatment of ores resulted in variation of their qualitative composition, surface state, and hardening their structure.