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Articles 1 - 25 of 25
Full-Text Articles in Physical Sciences and Mathematics
Medicaments In Preventing Iodine Deficiency, And Their Chemical Composition, I. R. Asqarov Doctor Of Chemical Sciences, Professor, A. S. Xojiqulov Teacher
Medicaments In Preventing Iodine Deficiency, And Their Chemical Composition, I. R. Asqarov Doctor Of Chemical Sciences, Professor, A. S. Xojiqulov Teacher
Scientific journal of the Fergana State University
The article discusses the causes of iodine deficiency, the state of the spread of iodine deficiency in the world and in the Republic of Uzbekistan, synthetic and natural remedies used for its treatment are described from the information given in writing supplements, used as the “Alcoman” medicinal product, as well as methods for making tincture from it and its use.
Synthesis Of The Betulinic Acid, Sh. Sh. Turg‘Unboyev Base Doctoral Student, A. X. Xaitbayev Doctor Of Chemical Sciences, Associate Professor
Synthesis Of The Betulinic Acid, Sh. Sh. Turg‘Unboyev Base Doctoral Student, A. X. Xaitbayev Doctor Of Chemical Sciences, Associate Professor
Scientific journal of the Fergana State University
Today, one of the most important tasks for the further development of the pharmaceutical industry is medicines obtained from local raw materials. This article describes the production of betulin from the bark of the Betula pendula tree growing in the territory of Uzbekistan, the synthesis of various derivatives based on it, and the study of the structure of substances by physical methods. Based on these studies, medicines will be created from local raw materials.
Beer Classification And Certification Based On Chemical Composition, D. T. Xasanova Doctor Of Philosophy In Chemical Sciences (Phd), I. R. Asqarov Doctor Of Chemical Sciences, Professor
Beer Classification And Certification Based On Chemical Composition, D. T. Xasanova Doctor Of Philosophy In Chemical Sciences (Phd), I. R. Asqarov Doctor Of Chemical Sciences, Professor
Scientific journal of the Fergana State University
The article analyzes the physical-chemical indicators that determine the commodity status characteristic of beer products, gives criteria for differentiating existing product codes and assigning product codes to the new types of products, as well as the features of applying new express analysis methods.
Sorption Of Copper (Ii), Nickel (Ii) And Cobalt (Ii) Ions Into The Ionite Modified By Polyphinylchloride And Polyethylene Polyamine, Kh Ismoilova, D Bekchanov, Sh Khasanov, M Baltaeva
Sorption Of Copper (Ii), Nickel (Ii) And Cobalt (Ii) Ions Into The Ionite Modified By Polyphinylchloride And Polyethylene Polyamine, Kh Ismoilova, D Bekchanov, Sh Khasanov, M Baltaeva
Scientific journal of the Fergana State University
IPolyphinylchloride was modified by polyethylene polyamine, and the ionites were studied in static conditions by the artificial solution of copper (II), nickel (II) and cobalt (II) ions. In static conditions, factors affecting the sorption process, such as time, temperature and concentration dependence were investigated. The results of the inquiry process were studied by IR analysis
Copolymerization Of Methylacrylate And Acrylic Acid, N Y. Bozorov, V. O. Kudishkin
Copolymerization Of Methylacrylate And Acrylic Acid, N Y. Bozorov, V. O. Kudishkin
Scientific journal of the Fergana State University
Linear copolymers of methylacrylate and acrylic acid with different content of monomer units have been synthesized by classical radical copolymerization in dioxane solution and in the block. The composition of copolymers was determined. The relative activities of the monomers calculated by the methods of Fineman - Ross and Kelen -Tudos. It is shown that the activity of acrylic acid can vary depending on the medium in which copolymerization is carried out.
Defining The Antioxsidants Quantity In Certification Of The Chicken Meat, B. N. Sattarova, I. R. Asqarov, Sh. X. Abdulloev
Defining The Antioxsidants Quantity In Certification Of The Chicken Meat, B. N. Sattarova, I. R. Asqarov, Sh. X. Abdulloev
Scientific journal of the Fergana State University
The article presents an analysis of the results obtained by chromatography-mass-spectrometric studies to determine the mass fractions of certain antioxidants in chicken meat, the excessive amount of which seriously threatens human health. The advantages of this method in the certification of meat products are substantiated. It has been established that the content of alpha-tocopherol in chicken meat imported from some foreign countries is several times higher than that produced in local poultry farms.
Solution Of Cancerogen Asbestos Problems In Obtaining Harmless Fibre Products, M. A. Axmadaliev, I. R. Asqarov
Solution Of Cancerogen Asbestos Problems In Obtaining Harmless Fibre Products, M. A. Axmadaliev, I. R. Asqarov
Scientific journal of the Fergana State University
The article presents the ways of obtaining ecologic harmless composite materials based on mineral fibers in the replacement of asbestos containing goods
Copolymerization Of Methylacrylate And Acrylic Acid, N Y. Bozorov, V. O. Kudishkin
Copolymerization Of Methylacrylate And Acrylic Acid, N Y. Bozorov, V. O. Kudishkin
Scientific journal of the Fergana State University
Linear copolymers of methylacrylate and acrylic acid with different content of monomer units have been synthesized by classical radical copolymerization in dioxane solution and in the block. The composition of copolymers was determined. The relative activities of the monomers calculated by the methods of Fineman - Ross and Kelen -Tudos. It is shown that the activity of acrylic acid can vary depending on the medium in which copolymerization is carried out.
Sorption Of Copper (Ii), Nickel (Ii) And Cobalt (Ii) Ions Into The Ionite Modified By Polyphinylchloride And Polyethylene Polyamine, Kh Ismoilova, D Bekchanov, Sh Khasanov, M Baltaeva
Sorption Of Copper (Ii), Nickel (Ii) And Cobalt (Ii) Ions Into The Ionite Modified By Polyphinylchloride And Polyethylene Polyamine, Kh Ismoilova, D Bekchanov, Sh Khasanov, M Baltaeva
Scientific journal of the Fergana State University
IPolyphinylchloride was modified by polyethylene polyamine, and the ionites were studied in static conditions by the artificial solution of copper (II), nickel (II) and cobalt (II) ions. In static conditions, factors affecting the sorption process, such as time, temperature and concentration dependence were investigated. The results of the inquiry process were studied by IR analysis
Defining The Antioxsidants Quantity In Certification Of The Chicken Meat, B. N. Sattarova, I. R. Asqarov, Sh. X. Abdulloev
Defining The Antioxsidants Quantity In Certification Of The Chicken Meat, B. N. Sattarova, I. R. Asqarov, Sh. X. Abdulloev
Scientific journal of the Fergana State University
The article presents an analysis of the results obtained by chromatography-mass-spectrometric studies to determine the mass fractions of certain antioxidants in chicken meat, the excessive amount of which seriously threatens human health. The advantages of this method in the certification of meat products are substantiated. It has been established that the content of alpha-tocopherol in chicken meat imported from some foreign countries is several times higher than that produced in local poultry farms.
Solution Of Cancerogen Asbestos Problems In Obtaining Harmless Fibre Products, M. A. Axmadaliev, I. R. Asqarov
Solution Of Cancerogen Asbestos Problems In Obtaining Harmless Fibre Products, M. A. Axmadaliev, I. R. Asqarov
Scientific journal of the Fergana State University
The article presents the ways of obtaining ecologic harmless composite materials based on mineral fibers in the replacement of asbestos containing goods
Swelling Kinetics Of Cationite Ku-2x4 In Solutions Of Different Concentrations Of Hydrochloric Acid, Kh.T. Trobov, N.B. Ferapontov, M.G. Tokmachov, G.Kh. Tursunova
Swelling Kinetics Of Cationite Ku-2x4 In Solutions Of Different Concentrations Of Hydrochloric Acid, Kh.T. Trobov, N.B. Ferapontov, M.G. Tokmachov, G.Kh. Tursunova
Scientific Journal of Samarkand University
From the position of the heterophase model of the structure of polymer gels, the kinetics of swelling of the cation exchanger KU-2x4 in HCl solutions of different concentrations was investigated. It is proved that the swelling proceeds according to the kinetic equations of the first-order reaction.
Study Textural, Physico-Chemical And Sorption Characteristics Of Activated Coal Prepared From Walnut, A.N. Mukhamadiyev, Sh.M. Sayitqulov, N.K. Mukhamadiyev
Study Textural, Physico-Chemical And Sorption Characteristics Of Activated Coal Prepared From Walnut, A.N. Mukhamadiyev, Sh.M. Sayitqulov, N.K. Mukhamadiyev
Scientific Journal of Samarkand University
In this paperbased on electron microscopic study of the samples of activated carbon obtained from walnut shells is shown that their structures have a developed porous surface. According to the results of semi-quantitative elemental analysis of the adsorbents investigated by the method of energy dispersive X-ray spectroscopy (EDAX), it was found that the adsorbent based on the walnut shells has the highest carbon content (92.3%). The activated carbon has the following characteristics: the moisture content is 6.9%, the total pore volume on water is 0.69 cm 3 /g, the pH of the aqueous extract is 6.9, the bulk density is …
Useful And Harmful Propeties Of Natural And Synthetic Food Additive, B. Sattorova, I. Asqarov,, A. Joraev,, K. Kirgizov.
Useful And Harmful Propeties Of Natural And Synthetic Food Additive, B. Sattorova, I. Asqarov,, A. Joraev,, K. Kirgizov.
Scientific journal of the Fergana State University
The article discusses the useful and harmful properties of natural and synthetic food additives.
Obtaining Of Adsorbents From Fruit Seeds And Studying Their Physicochemical Properties, G’ Ochilov, G. Tursunova, R, Qarabaeva,, A Ibrohimov
Obtaining Of Adsorbents From Fruit Seeds And Studying Their Physicochemical Properties, G’ Ochilov, G. Tursunova, R, Qarabaeva,, A Ibrohimov
Scientific journal of the Fergana State University
The physicochemical properties of adsorbents obtained by thermal processing of stone fruit wastes were investigated. The possibility of their use for the purification of waste water from heavy metal ions in experiments with simulated waste water containing copper ions has been studied.
Useful And Harmful Propeties Of Natural And Synthetic Food Additive, B. Sattorova, I. Asqarov,, A. Joraev,, K. Kirgizov.
Useful And Harmful Propeties Of Natural And Synthetic Food Additive, B. Sattorova, I. Asqarov,, A. Joraev,, K. Kirgizov.
Scientific journal of the Fergana State University
The article discusses the useful and harmful properties of natural and synthetic food additives.
Obtaining Of Adsorbents From Fruit Seeds And Studying Their Physicochemical Properties, G’ Ochilov, G. Tursunova, R, Qarabaeva,, A Ibrohimov
Obtaining Of Adsorbents From Fruit Seeds And Studying Their Physicochemical Properties, G’ Ochilov, G. Tursunova, R, Qarabaeva,, A Ibrohimov
Scientific journal of the Fergana State University
The physicochemical properties of adsorbents obtained by thermal processing of stone fruit wastes were investigated. The possibility of their use for the purification of waste water from heavy metal ions in experiments with simulated waste water containing copper ions has been studied.
Study Of The Process Of Production Of Liquid Nitrogenfertilizers, A M. Reymov
Study Of The Process Of Production Of Liquid Nitrogenfertilizers, A M. Reymov
Karakalpak Scientific Journal
The dependence of the changes in physico-chemical and rheological properties of solutions of the composition in systems [11,82%NH4CI +1,65% (NH4) 2SO4+6,76%К2S04+79,77%H2O]-CO(NH2)2 and [11,82%NH4CI+1,65%(NH4)2SO4+6,76%K2S04+ 79,77%H2O]-NH4NO3. On the basis of the studied diagrams "composition-properties" the optimal ratio of the components of the mother solution: nitrogen-containing fertilizers is 60:40 and 50:50, respectively, with the addition of urea and ammonium nitrate
The Method Of Analyses Of Juices And Fruits, Which Produced In Uzbekistan, A. Ibragimov, Yu Isaev, O. Yigitaliyeva,, A. Ibrohimov.
The Method Of Analyses Of Juices And Fruits, Which Produced In Uzbekistan, A. Ibragimov, Yu Isaev, O. Yigitaliyeva,, A. Ibrohimov.
Scientific journal of the Fergana State University
The article presents and discusses the requirements of state standards of the Republic of Uzbekistan for fruit juices, as well as the results of determining the amount of ascorbic acid in various sorts of apples grown in the Fergana region.
The Synthesis Of Glytsirizin Acid With Components Of Urea Syclization, Yu. Isayev, S. Rustamov, I. Asqarov, N Tu’Laqov
The Synthesis Of Glytsirizin Acid With Components Of Urea Syclization, Yu. Isayev, S. Rustamov, I. Asqarov, N Tu’Laqov
Scientific journal of the Fergana State University
The article presents the work on the synthesis of a complex compound of glycyrrhizin acid and urea, as well as some physicochemical parameters of the compounds are obtained
Development Of Technology Of Potassium Percarbonate Production, N Erkaeva
Development Of Technology Of Potassium Percarbonate Production, N Erkaeva
Karakalpak Scientific Journal
In this paper, the results of a study on the production of potassium percarbonate are obtained. It has been established that the interaction of potassium carbonate and hydrogen peroxide produces potassium percarb onate in the form of К2СОЗ • 3H202, which exhibits individual properties. A flow chart for the production of potassium percarbonate has been developed.
Volume Diagram System Na+, K+, 1/2 Mg2+//1/2 S042-, Cl--H20 At 0°C, A Erkaev
Volume Diagram System Na+, K+, 1/2 Mg2+//1/2 S042-, Cl--H20 At 0°C, A Erkaev
Karakalpak Scientific Journal
Based on the findings of theoretical and experimental studies of first constructed volume diagram of phase equilibria 2Na+, 2K+, Mg2+ \\ SO42-' 2Сl- H20 at 0°C. The boundaries of the contact areas of the crystallization of salts. Established nine crystallization fields and lines of intersection, five of invariant (Pn), foteen monovariant (snx) and foteen divariant (Enx) nodal points
Models Of Chromatographic Retention Of Isoquinoline Derivatives, I.Kh. Ruziev, N.K. Muhamadiyev
Models Of Chromatographic Retention Of Isoquinoline Derivatives, I.Kh. Ruziev, N.K. Muhamadiyev
Scientific Journal of Samarkand University
The chromatographic retention derivatives of pyrimidinone and isoquinoline was studied under conditions of reversed-phase HPLC variant. The retention factors were determined for different eluent compositions (CH3CN, CH3OH, and H2O). The dependence of retention on the concentration of an organic modifier in the mobile phase was studied. The applicability of known retention models to the studied chromatographic systems has been established.
Effect Various Factors On The Alkylation Reaction Of 2-Amino 6-Methyl(Phenyl)Pyrimidine-4-Ones., K.A. Zahidov, Z.U. Samarov, J.J. Javharov, O.U. Urinov
Effect Various Factors On The Alkylation Reaction Of 2-Amino 6-Methyl(Phenyl)Pyrimidine-4-Ones., K.A. Zahidov, Z.U. Samarov, J.J. Javharov, O.U. Urinov
Scientific Journal of Samarkand University
Alkylation of polident anions of 2-amino 6-methyl(phenyl)pyrimidine-4-ones with “soft” (methyl iodide) and “hard” (methyltozilate) alkilation agents have been systematically studied. It was shown the nature of solvents influnce on reactivity and the direction of alkylation.
Dependence Physiological Activity Of The Nitraria Indol Alkaloids And Their Analogits On Chemical Structure, A. Ibragimov, A. Ibrohimov
Dependence Physiological Activity Of The Nitraria Indol Alkaloids And Their Analogits On Chemical Structure, A. Ibragimov, A. Ibrohimov
Scientific journal of the Fergana State University
Relationship between chemical structure and physiological activity of Nitraria indol alkaloids and their synthesized analogists are studied. As a basis of analysis the data on toxicology as well as on hypotensiv and spasmolitic activity is taken.