Materials Science

Subjects of research: alkaloids harminc and hannaline, Zn(II), Mn(II), Co(II), Cu(II), Re(IV), Mo(VI), V(V), Co(III), Cr(III), Fe(III), Ni(II).
Purpose of work: To synthesize and research new coordination compounds of d-mctals with biologically active carboline alkaloids. To determine the conditions of complex formation of carbolinc alkaloids with d-mctals and their biological activity.
Methods of research: chemical, physicochemical, physical.
The results obtained and their novelty: For the first time a number of complexes of harmaline, harminc and its fluorine derivative were synthesized. Their properties were determined by means of electronic, IR-, PMR-spectroscopics, elementary and dcrivatographic analyses. With the help of quantum-chemical methods PM3 the energetic characteristics, bond lengths, valence angles of free ligands and their ion forms were calculated. Based on the orbital and charge control the most possible centers of localization of coordination bonds were determined. For the first time crystal structures of two novel harmaline complexes were deciphered. Phytotoxic and biological activities of synthesized compounds were determined.
Scientific and practical value: Developed conditions and methods of synthesis of complex compounds can be used as the bases for practical purpose oriented syntheses of similar coordination compounds along with prediction of properties and structure of coordination compounds of d-mctals with alkaloid derivatives. The results of quantum-chemical analysis of ligands and for the first time obtained by means of X-ray analysis crystal characteristics of novel coordination compounds can be used as reference information.
Determined biological activity of synthesized coordination compounds denotes to their possible use for development of substances with anti-cancer activity.
Degree of embed and economical efficiency: Obtained experimental data have been used in educational process at the department of inorganic and analytical chemistry of National University of Uzbekistan.
Application field: inorganic chemistry, coordination chemistry, agriculture, medicine.

The aim of the research work is the development of scientific foundations for the development and controlling of automated technological equipment on aerodynamic action for increasing production efficiency.
Scientific novelty of the research work Calculation and design of automated technological equipment for the aerodynamic action of finishing and hardening processing of cylindrical parts and developing of fundamentally new devices for loading flat products, transferring aggressive media, transporting small piece products and installing rivets into a hole with a vertical and horizontal axis..

The aim of research work is to evaluate and enhance the structural and seismic safety of private residential buildings built from low-strength materials.
Scientific novelty of the research work is as following stages:
a methodology has been developed for the calculation of residential buildings erected from low-strength materials in order to ensure their structural and seismic safety;
an experimental-theoretical approach to the determination of physico-mcchanical and deformative characteristics of the material for the laying of bearing walls has been developed;
the effect of longitudinal forces on stresses in bent elements of a wooden frame in houses as "Sinch" is justified;
improved calculation of normal stresses in the bent elements of the wooden frame of buildings such as "Sinch", taking into consideration of decreasing on the basic stooping moment from longitudinal forces;
the nature of development of plastic deformation along wood fibers of wooden frame as "Sinch" type houses elements is substantiated depending on the level of the applied load and the number of load cycles;an experimental approach to the establishment of dynamic characteristics of natural oscillations of houses which made of low-strength materials with the use of a power-plant-vibrating table directed action, simulating seismic action.

The aim of the research work is to develop the optimal chemical composition and heat treatment regimes for high-chromium white cast irons and hard-alloy coatings.
The scientific novelty of the research work: the optimal composition of high-chromium white cast iron was calculated for the sum of C + Si + Mn + Cr + Ni elements, which provides the formation of the structure and properties required for heat treatment;
the harmful effect of sulfur has been determined to reduce the wear resistance of high-chromium alloys;
the mechanism of structure formation is developed at drawing on working surfaces of details of carbide coatings by casting on gasified models;
the phase heredity of the parameters of the fine structure of the metal base of high-chromium cast irons and alloys during phase recrystallization during the final thermal treatment is determined;
experimental conditions for the existence of an extreme temperature of heating of a high-chromium alloy are developed, when after cooling of the alloy in its metallic base a structure with a very high dislocation density is formed. With repeated phase recrystallization, the dislocation data is inherited;
the use of the heredity effect of the fine structure during double phase recrystallization is revealed, which increases the wear resistance of the alloy by 33-35% and it becomes higher than that of the imported alloy, and for wear-resistant coatings - by 80-82%.

Permanent development of ceramics technologies is a necessary condition for the continuous improvement of many branches of industry. Each type of ceramic product demand a specific technology and has an optimal field of application.