Open Access. Powered by Scholars. Published by Universities.®

Education Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 31 - 60 of 287

Full-Text Articles in Education

Socio-Political, Spiritual And Moral Views Of Zainiddin Vasifi, Ravshanbek Jalilovich Mahmudov, Temur Bobir Ogli Abdullaev Mar 2021

Socio-Political, Spiritual And Moral Views Of Zainiddin Vasifi, Ravshanbek Jalilovich Mahmudov, Temur Bobir Ogli Abdullaev

Bulletin of Gulistan State University

Zainiddin Abdujalil Vasifi, a young contemporary of Alisher Navoi, lived in the late 15thand early 16thcenturies. It is known from the sources that Zainiddin Vasifi wrote a number of works, but his work "Badoe ul-Wakoe" ("Rare Events") was translated from Persian and has come down to us. The thinker provides valuable information about the social and political life of Khorasan, the cultural life of Herat, Alisher Navoi, Hussein Vaz Kashifi, Fakhriddin Ali Safi, Hussein Boykaro. This work presents valuable information about the cultural life of the 16th century, the spiritual heritage of scientists, worldview, morality, human qualities of people of …


Developingstudents’Interest In National Values Through The Use Of Fine Arts Works In Teaching The History Of Uzbekistan, Sulaymon Amirkulovich Haydarov, Bahodir Xakimjonovich Xakimjonov Mar 2021

Developingstudents’Interest In National Values Through The Use Of Fine Arts Works In Teaching The History Of Uzbekistan, Sulaymon Amirkulovich Haydarov, Bahodir Xakimjonovich Xakimjonov

Bulletin of Gulistan State University

The visual arts used in history lessons have their own requirements, just like other history textbooks, and the process for fulfilling these requirements is different. The visual arts used in history lessons solve a number of problems. The bulk of the teaching of history is conducted in the form of lessons. That is, students receive the main content of educational materials in the classroom, that is, during the lesson. While the use of historical documents and art collections with historical themes in history lessons is illustrated through the teacher's speech, visual aids provide students with a vivid and clear picture …


Study Of The Thermal And Temperature Conditions Of Flat And Inclined Lands, Shavki Kulaganovich Niyozov, Abdurahmon Abdullaev, Rustam Ummatkulovich Elmurodov, Shahzod Xolmat O‘G‘Li O‘Tkirov Mar 2021

Study Of The Thermal And Temperature Conditions Of Flat And Inclined Lands, Shavki Kulaganovich Niyozov, Abdurahmon Abdullaev, Rustam Ummatkulovich Elmurodov, Shahzod Xolmat O‘G‘Li O‘Tkirov

Bulletin of Gulistan State University

Prior to sowing seeds of agricultural crops, awareness of the thermal, water, and light regimes of the land is of great importance. In this article, we studied the thermal and temperature conditions of flat and inclined lands through the heat transfer equations in the soil. At the same time, the temperature invariance at a certain depth from the soil surface was mainly obtained, on the basis of which a formula for calculating the soil temperature from the sediment was derived by the method of harmonic analysis. In addition, formulas for flat Land and temperature regimes of 10˚, 20˚, 30˚ slopes …


Features Of Liquid-Phase Epitaxy Of (Gaas)1-X(Znse)X Solid Solution From The Tin Solution-Melt, Amin Safarbaevich Saidov, Dadazhon Valikhanovich Saparov, Shukrullo Negmatovich Usmonov, Kurban Gulmuratovich Gaimnazarov, Mansurbek Kilichovich Sultanov Mar 2021

Features Of Liquid-Phase Epitaxy Of (Gaas)1-X(Znse)X Solid Solution From The Tin Solution-Melt, Amin Safarbaevich Saidov, Dadazhon Valikhanovich Saparov, Shukrullo Negmatovich Usmonov, Kurban Gulmuratovich Gaimnazarov, Mansurbek Kilichovich Sultanov

Bulletin of Gulistan State University

Layers of (GaAs)1-x(ZnSe)x (0  x  0.80) molecular substitution solid solutions with a smoothly (but not monotonically) varying composition on monocrystal GaAs (100) substrates were grown by liquid-phase epitaxy from a limited volume of a tin solution-melt. Based on the results of the solubility of GaAs, ZnSe in tin and the phase diagram of binary systems Ga-Sn, As-Sn, Zn-Sn and Sn-Se, it is shown that binary compounds in the tin solvent at temperatures of 650-750°C are below the melting point of the corresponding materials are found mainly in the form of GaAs and ZnSe molecules. Moreover, in the temperature …


Applications Of The Improper Integrals To The Physical Process, Husanboy Norjigitov, Iroda Dustnazarova Mar 2021

Applications Of The Improper Integrals To The Physical Process, Husanboy Norjigitov, Iroda Dustnazarova

Bulletin of Gulistan State University

Studying the magnetic field of current, Bio and Savar came to the conclusion that the force with which the current acts on the magnetic charge can be considered as equal to the forces, as if coming from individual infinitesimal current elements. In this paper, we study the physical applications of definite and improper integrals. It also provides an in-depth analysis of the famous Bio-Savard Laplace's law in physics. It was calculating that this is the power acting on the current through l long conductor and the gravitational attraction of the body. Various descriptive schemes were used to describe computational processes. …


Automodeled - Solution To The Problem Of Ground Water Dynamics In The Presence Of Nonlinear Evaporation, Kengash Jamuratov Mar 2021

Automodeled - Solution To The Problem Of Ground Water Dynamics In The Presence Of Nonlinear Evaporation, Kengash Jamuratov

Bulletin of Gulistan State University

The problem of determining the level of groundwater near reservoirs, taking into account evaporation from the surface of groundwater, is reduced to a boundary value problem with an unknown boundary for a parabolic equation. The condition for the problem (motion) to be self-similar is established. A problem with an unknown boundary is distinguished and investigated, which differs from the well-known problems of Stefan, Verigin, Florin. The problem under consideration describes the filtration process near new canals and reservoirs, taking into account evaporation, which is a nonlinear finite function of time and groundwater level. A separate method of linearization of the …


Problems Of Predicting The Success Of Plant Introduction In Uzbekustan Conditions, Igor Vladimirovich Belolipov, Khazratkul Kilichievich Karshibaev, Nodira Ziyodovna Arabova, Avaz Musaevich Islamov Mar 2021

Problems Of Predicting The Success Of Plant Introduction In Uzbekustan Conditions, Igor Vladimirovich Belolipov, Khazratkul Kilichievich Karshibaev, Nodira Ziyodovna Arabova, Avaz Musaevich Islamov

Bulletin of Gulistan State University

The article deals to bring theoretical and practical aspect of successful result introduction wild plants Uzbekistan flora. The authors, based on the results of long-term introduction studies of more than 700 species of indigenous flora in the conditions of the Botanical Garden and the Tashkent experimental site of the Institute of Botany of the Academy of Sciences of the Republic of Uzbekistan, established that ecological-introduction analysis is one of the main stages in proqnosis the successful of plant introduction. When studying plants using the ecological-introduction method, the main effort is directed to collecting the maximum amount of materials about the …


The Use Of Physiologically Active Substances In The Biosorption Of Iron (Iii) Ion, Ugilay Koxxorovna Abdurahmanova, Habibjon Hojiboboyevich Qushiyev, Muxriddin Shuxrat O’Gli Xudoynazarov, Sardor Abdujalil O’Gli Majidov Mar 2021

The Use Of Physiologically Active Substances In The Biosorption Of Iron (Iii) Ion, Ugilay Koxxorovna Abdurahmanova, Habibjon Hojiboboyevich Qushiyev, Muxriddin Shuxrat O’Gli Xudoynazarov, Sardor Abdujalil O’Gli Majidov

Bulletin of Gulistan State University

This article proposes a simple and rapid method for the spectrophotometric determination of iron (III) using a physiologically active compound - the mono ammonium salt of glycyrrhizic acid (MASGA). The spectral characteristics of the MASGK-Fe (III) complex - absorption maxima (λmax = 440nm) and the actual molar extinction coefficient (ε = 3,425 × 102) were determined. The experimental results showed that when using a universal buffer solution, the complex compound had the maximum optical density. Therefore, in subsequent studies, a universal buffer solution with pH = 5 was used. The experimental results showed that the optical density of the complex …


Herbicidal Action And Morphogenetic Adaptation Of ‘Sultan’ Cotton Variety, Sherzod Toxir O`G`Li Pardabayev, Xislat Kudratovich Xaydarov Mar 2021

Herbicidal Action And Morphogenetic Adaptation Of ‘Sultan’ Cotton Variety, Sherzod Toxir O`G`Li Pardabayev, Xislat Kudratovich Xaydarov

Bulletin of Gulistan State University

Ensuring the protection of agricultural plants from pests, diseases and weeds in our republic, preventing the harmful effects of plant protection products on human health and the environment are among the most important issues. This article describes in detail the resistance of cotton (Sultan variety) to herbicides (galaxifop-P-methyl), as well as the negative and positive effects of herbicides on seedlings. The study was carried out using various concentrations of herbicides and analyzed the individual morphological characteristics of plant seedlings at each concentration. The experiments were carried out in laboratory and field conditions. In the experiment, five types of concentrations of …


Assessment And Determination Of The Dynamics Of Changes In Salinization Of Irrigated Lands Under The Influence Of Climate Change (In The Case Of Syrdarya Province), Sarvar Akramovich Odilov, Sayidjahon Zokir Ogli Hasanov, Rashid Anarovich Kulmatov, Jasur Ashiralievich Mirzaev Mar 2021

Assessment And Determination Of The Dynamics Of Changes In Salinization Of Irrigated Lands Under The Influence Of Climate Change (In The Case Of Syrdarya Province), Sarvar Akramovich Odilov, Sayidjahon Zokir Ogli Hasanov, Rashid Anarovich Kulmatov, Jasur Ashiralievich Mirzaev

Bulletin of Gulistan State University

In irrigated lands of the Aral Sea Basin, salt-affected areas are increasingly rising and this negatively impacts agricultural development and food security in such countries located in the basin. Drivers, increasing salt-affected areas, are assumed to be climate change, unregulated high groundwater levels and its increased mineralization, poor functioning of the collector-drainage system, and insufficient compliance with agro-technical requirements. These drivers, in turn, lead to the withdrawal of arable land from agricultural purposes and a significant drop in crop yields. This is especially the case in the irrigated areas of the lower reaches of the Amu Darya and Syr Darya …


Teaching “Plants Reproduction” Subject In The Bachelors Of Higner Education System, Khazratkul Kilichievich Karshibaev Dec 2020

Teaching “Plants Reproduction” Subject In The Bachelors Of Higner Education System, Khazratkul Kilichievich Karshibaev

Bulletin of Gulistan State University

Thisarticle is devoted to improving the system of teaching “Plants reproduction”subject related to social science on the basis of new pedagogical technologies. In the final work, the text of a lecture on the topic “Plantsreproduction”, presented in the scientific program, focused on people and based on modular educational technologies, and developed its didactic support. In the work, based on integrated design, a technological map of this topic has been developed, and a set of prepared cases and test questions on this topic is presented. During the lecture, a set of control questions was developed to clarify the level of assimilation …


Power In Justice, Mustafo Muhammedovich Bayeshanov Dec 2020

Power In Justice, Mustafo Muhammedovich Bayeshanov

Bulletin of Gulistan State University

The article analyzes the novel by M. Gorky "Mother and Temur" from the cycle "Tales of Italy". For Gorky, the real heroes were those who "create life in spite of death, who conquer death." A fairy tale in which the image of the mother is created, sometimes growing to the personification of the Motherland, acquires a deep philosophical meaning. Gorky begins the ninth tale with words full of deep meaning: “Let us glorify a woman - Mother, an inexhaustible source of all-conquering life! M. Gorky created not only his own unique artistic world, but also his own aesthetics of beauty, …


The Initial Period Of Formation Of The Uzbek Scientific Linguistics, Fazliddin Galievich Sharipov, Jahongir Galievich Sharipov Dec 2020

The Initial Period Of Formation Of The Uzbek Scientific Linguistics, Fazliddin Galievich Sharipov, Jahongir Galievich Sharipov

Bulletin of Gulistan State University

Особое внимание проблемам словообразования в лингвистике уделяется еще со времен Махмуда Кошгарий. В целом в мировой лингвистике ведутся работы по таким проблемам словообразования, как выявление, классификация и описание способов их образования. Кроме того, в лингвистике тюркских языков особое внимание уделяется проблемам словообразования в тюркских языках. Кроме того, существует ряд научных исследований, направленных на раскрытие сущности словообразования в узбекском языкознании. В этой связи работы известного узбекского лингвиста А. Гуламова по словообразованию служат базовым исследованием этой проблемы, и А. Гуламов в своей работе ссылается на вклад работ А. Ходжиева в изучение способов словообразования в узбекском языке.


Morphological Peculiarities Of Interrogative Pronouns In English And Uzbek Languages, Dilfuza Turdikulovna Normamatova Dec 2020

Morphological Peculiarities Of Interrogative Pronouns In English And Uzbek Languages, Dilfuza Turdikulovna Normamatova

Bulletin of Gulistan State University

In this article it is defined the semantic forms of interrogative pronoun and the use of interrogative questions as part of the design of a communication. It is also followed the interrogative pronouns’ different activation and the accessing the connection of with other variants of syntaxes. It is clarified the functions of interrogatives which are “Who, What, Which” have variety of syntaxes denoting agentive, state, qualitative, relative and the function of object. Thereby, it is studied the positions and the scaling of agentive syntaxes in special and general questions. In the work it is enlightened that the most common prompt …


The Role Of National Traditions And Holidays In Youth Education, Muzaffar Shodmonovich Botirov Dec 2020

The Role Of National Traditions And Holidays In Youth Education, Muzaffar Shodmonovich Botirov

Bulletin of Gulistan State University

Every nation living on the territory of our Republic has its own culture, which represents the nationality. The degree of reflection of national identity in Uzbek families in behavior, personal qualities and family relations is a fact that does not require proof. The deepening socio-economic and legal reforms in our country require new thinking, worldview, beliefs, ideology, as well as a qualitative study of the rich historical heritage, customs and traditions, holidays, in a word, national values. Because civil society respects universal values. it is the Foundation of a free democratic legal society in which human rights and freedoms are …


Political-Administrative Units Of Ustrushana And Their Administrative Centres, Qaxramon Oblokulovich Almanov Dec 2020

Political-Administrative Units Of Ustrushana And Their Administrative Centres, Qaxramon Oblokulovich Almanov

Bulletin of Gulistan State University

In the following article the political – administrative territories of Ustrushana and their control centers’ role in the management of local country, the process evolution of tangible culture is analyzed under the sourced materials. The Rustavs in Ustrushon reveal that the local handcrafters had different titles, currencies, stamps, and dozens of oasis rulers. The local features of the urban culture functioning as political centers also determine the significance of the theme.


From The History Of Uzbekistan's Cooperation With Unesco, Obid Rakhimovich Nazarov, Rustam Abduvaid Oglu Nematov Dec 2020

From The History Of Uzbekistan's Cooperation With Unesco, Obid Rakhimovich Nazarov, Rustam Abduvaid Oglu Nematov

Bulletin of Gulistan State University

In the articleUzbekistan's accession to international documents developed and adopted within the framework of UNESCO contributes to the international legal protection of our cultural heritage by the world community, Uzbekistan's scientific potential, science, culture, historical programs, unique archeological and architectural complexes, national and spiritual masterpieces. Along with the wide range of opportunities to promote and increase the effectiveness of their work in this area, the further development of our legislation in this area, as well as the further development of education, science, culture, information and communication technologies in Uzbekistan. and focuses on opportunities to help it stay strong in its …


Protection Of Plants For Years In The Plantations Of Ferula Tadshikorum Pimenov, Moxira Asatullaevna Khalkuzieva, Umarqul Rahmonqulov Dec 2020

Protection Of Plants For Years In The Plantations Of Ferula Tadshikorum Pimenov, Moxira Asatullaevna Khalkuzieva, Umarqul Rahmonqulov

Bulletin of Gulistan State University

This article provides a brief biology of the Tajik kovrak (F.tadshikorum Pimen.) And information on the establishment of plantations in the arable lands of Arnasay district of Jizzakh region in 2015-2019 by sowing seeds of the plant from different regions. The experiment was of two types: Option 1, in which the soil was well tilled, plowed, and then sown, and Option 2 was chiseled and then sown in seedbeds. It was found that planting resin-bearing husks in plowed areas gave better results than in chisel-planted areas. In both cases, the number of fragile seedlings has been declining over the years. …


Penetration Of Impurities Into The Crystal Lattice Of Solid Bodies With The Help Of Ion Implantation And Bombardment, Rustam Ummatkulovich Elmurodov, Shovqi Kulaganovich Niyazov, Gulom Bazarboevich Samatov, Abdurahmon Abdullaev, Ilhom Maripov, Abduazim Faizullaev Dec 2020

Penetration Of Impurities Into The Crystal Lattice Of Solid Bodies With The Help Of Ion Implantation And Bombardment, Rustam Ummatkulovich Elmurodov, Shovqi Kulaganovich Niyazov, Gulom Bazarboevich Samatov, Abdurahmon Abdullaev, Ilhom Maripov, Abduazim Faizullaev

Bulletin of Gulistan State University

The article explains that by methods of ion implantation or bombardment it is possible to inject foreign impurities into the crystal lattice of metal substrates. For this purpose, a special experimental setup with a high vacuum condition is used. Under normal conditions, atoms or molecules of the atmosphere interact with the surface of solids. As a result of the diffusion process, atoms or molecules of the atmosphere penetrate into the near-surface region, into the crystal lattice of solids and form a connection of some type. Usually, this diffusion process occurs very slowly and for a long time, as a result, …


Study Of Natural Resources, Anatomical Structure And Chemical Composition Of Helichrysum Maracandicum Of Tashkent Region, Olimjon Kaxharovich Khojimatov, Dilovar Talibdjonovna Khamraeva, Alisher Nuralievich Khujanov, Asadbek Tajikulovich Sarabekov Dec 2020

Study Of Natural Resources, Anatomical Structure And Chemical Composition Of Helichrysum Maracandicum Of Tashkent Region, Olimjon Kaxharovich Khojimatov, Dilovar Talibdjonovna Khamraeva, Alisher Nuralievich Khujanov, Asadbek Tajikulovich Sarabekov

Bulletin of Gulistan State University

The article contains data on the morphological-anatomical structure of the leaf, stem and flower, the chemical composition of the inflorescence, as well as the reserves of a valuable medicinal plant - the Immortal of Samarkand. During the study, the places of distribution of this plant in the Tashkent region and its biological and operational reserves were determined. In addition, according to the results of the morphological and anatomical structure, places of localization of biologically active substances in the elements of the flower and inflorescence were established, as well as the chemical composition of the basket was studied. On the basis …


Power In Justice, Mustafo Muhammedovich Bayeshanov Dec 2020

Power In Justice, Mustafo Muhammedovich Bayeshanov

Bulletin of Gulistan State University

The article analyzes the novel by M. Gorky "Mother and Temur" from the cycle "Tales of Italy". For Gorky, the real heroes were those who "create life in spite of death, who conquer death." A fairy tale in which the image of the mother is created, sometimes growing to the personification of the Motherland, acquires a deep philosophical meaning. Gorky begins the ninth tale with words full of deep meaning: “Let us glorify a woman - Mother, an inexhaustible source of all-conquering life! M. Gorky created not only his own unique artistic world, but also his own aesthetics of beauty, …


The Seed Biology Of Some Fodder Legumes Plants (Fabaceae) In The Arid Zone Of Uzbekistan, Khazratkul Kilichevich Karshibaev, Jaxongir Khazratkulovich Karshibaev, Zarina Furkatovna Jumaeva, Farrukh Bakhrom Oglu Abdukholiqov Dec 2020

The Seed Biology Of Some Fodder Legumes Plants (Fabaceae) In The Arid Zone Of Uzbekistan, Khazratkul Kilichevich Karshibaev, Jaxongir Khazratkulovich Karshibaev, Zarina Furkatovna Jumaeva, Farrukh Bakhrom Oglu Abdukholiqov

Bulletin of Gulistan State University

The article provides information about the quality of seeds: infestation, germination, humidity and mass of 1000 seeds of some fudder legumes plants. The infestation of seeds in the studied species in natural conditions ranges from 16,9 to 22,4 %, and the moisture content of seeds was 12.9-15.4 %, depending on the species. Hard-seeding is very high, from 80.6 (O.micrantha) to 95.4% (A.sieversianus). Seed dormancy in the studied taxa according to the classification of M. G. Nikolaeva et al. (1985) belongs to the physical group of exogenous dormancy– Af. The rate of water intake to seeds largely depends on the heterogeneity …


Distribution Of Terrestrial Molluscs In Biotopes And Altitude Belts In The Zaamin Mountains, Abdulla Tozhiulovich Karimulov Dec 2020

Distribution Of Terrestrial Molluscs In Biotopes And Altitude Belts In The Zaamin Mountains, Abdulla Tozhiulovich Karimulov

Bulletin of Gulistan State University

The article is devoted to the altitudinal and biotopic distribution of terrestrial mollusсs of the Zaamin mountains. Faunistic analysis showed that 31 species of mollusсs belonging to 19 genera and 14 families live in this region. The high-altitude distribution of mollusсs was carried out according to the classification of K.Z.Zakirov, where such high-altitude zones as chul (plains), adyr (foothills), tau (mountains) and yaylau (high mountains) were identified. Analysis by altitude belts showed that in the chul belt there are 4 (12.9%), in the adyr belt 20 (64.5%), in the tau belt 30 (96.8%) and in the yaylau belt 6 (19.4%) …


The Initial Period Of Formation Of The Uzbek Scientific Linguistics, Fazliddin Galievich Sharipov, Jahongir Galievich Sharipov Dec 2020

The Initial Period Of Formation Of The Uzbek Scientific Linguistics, Fazliddin Galievich Sharipov, Jahongir Galievich Sharipov

Bulletin of Gulistan State University

Особое внимание проблемам словообразования в лингвистике уделяется еще со времен Махмуда Кошгарий. В целом в мировой лингвистике ведутся работы по таким проблемам словообразования, как выявление, классификация и описание способов их образования. Кроме того, в лингвистике тюркских языков особое внимание уделяется проблемам словообразования в тюркских языках. Кроме того, существует ряд научных исследований, направленных на раскрытие сущности словообразования в узбекском языкознании. В этой связи работы известного узбекского лингвиста А. Гуламова по словообразованию служат базовым исследованием этой проблемы, и А. Гуламов в своей работе ссылается на вклад работ А. Ходжиева в изучение способов словообразования в узбекском языке.


The Role Of National Traditions And Holidays In Youth Education, Muzaffar Shodmonovich Botirov Dec 2020

The Role Of National Traditions And Holidays In Youth Education, Muzaffar Shodmonovich Botirov

Bulletin of Gulistan State University

Every nation living on the territory of our Republic has its own culture, which represents the nationality. The degree of reflection of national identity in Uzbek families in behavior, personal qualities and family relations is a fact that does not require proof. The deepening socio-economic and legal reforms in our country require new thinking, worldview, beliefs, ideology, as well as a qualitative study of the rich historical heritage, customs and traditions, holidays, in a word, national values. Because civil society respects universal values. it is the Foundation of a free democratic legal society in which human rights and freedoms are …


Political-Administrative Units Of Ustrushana And Their Administrative Centres, Qaxramon Oblokulovich Almanov Dec 2020

Political-Administrative Units Of Ustrushana And Their Administrative Centres, Qaxramon Oblokulovich Almanov

Bulletin of Gulistan State University

In the following article the political – administrative territories of Ustrushana and their control centers’ role in the management of local country, the process evolution of tangible culture is analyzed under the sourced materials. The Rustavs in Ustrushon reveal that the local handcrafters had different titles, currencies, stamps, and dozens of oasis rulers. The local features of the urban culture functioning as political centers also determine the significance of the theme.


Obtaining And Propertics Polymermetalcomplex On The Base Carboxymethylcellulose And Selenium, Abdishukur Abduhalilovich Sarymsakov, Khaydar Ergashovich Yunusov, Foziljon Mamarayim O’G'Li Turakulov, Javlon Zafar O’G’Li Jalilov, Ziyovuddin Zayniddinovich Hakimov, Bychkovsky Mihayilovich Pavel, Mamarayim Aynaqulovich Turakulov Dec 2020

Obtaining And Propertics Polymermetalcomplex On The Base Carboxymethylcellulose And Selenium, Abdishukur Abduhalilovich Sarymsakov, Khaydar Ergashovich Yunusov, Foziljon Mamarayim O’G'Li Turakulov, Javlon Zafar O’G’Li Jalilov, Ziyovuddin Zayniddinovich Hakimov, Bychkovsky Mihayilovich Pavel, Mamarayim Aynaqulovich Turakulov

Bulletin of Gulistan State University

In this study, technical sodium carboxymethylcellulose (Na-CMC) with degree of substitution (DS) = 0.62-0.90 and a degree of polymerization (DP) = 200-600 were washed in 70% ethyl alcohol and a 2% fraction of purified Na-CMC was centrifugation at a speed of 6000 rpm for 20 minutes. A 0.1 M solution of SeO2 was added to the centrifuged Na-CMC solution at 60 ⁰C and mixed mechanically. Samples of gels, films and powders containing a solution of Na-CMC containing stabilized selenium nanoparticles synthesized by chemical reduction were taken and their physicochemical properties were studied. The size and shape of selenium nanoparticles present …


From The History Of Uzbekistan's Cooperation With Unesco, Obid Rakhimovich Nazarov, Rustam Abduvaid Oglu Nematov Dec 2020

From The History Of Uzbekistan's Cooperation With Unesco, Obid Rakhimovich Nazarov, Rustam Abduvaid Oglu Nematov

Bulletin of Gulistan State University

In the articleUzbekistan's accession to international documents developed and adopted within the framework of UNESCO contributes to the international legal protection of our cultural heritage by the world community, Uzbekistan's scientific potential, science, culture, historical programs, unique archeological and architectural complexes, national and spiritual masterpieces. Along with the wide range of opportunities to promote and increase the effectiveness of their work in this area, the further development of our legislation in this area, as well as the further development of education, science, culture, information and communication technologies in Uzbekistan. and focuses on opportunities to help it stay strong in its …


Penetration Of Impurities Into The Crystal Lattice Of Solid Bodies With The Help Of Ion Implantation And Bombardment, Rustam Ummatkulovich Elmurodov, Shovqi Kulaganovich Niyazov, Gulom Bazarboevich Samatov, Abdurahmon Abdullaev, Ilhom Maripov Dec 2020

Penetration Of Impurities Into The Crystal Lattice Of Solid Bodies With The Help Of Ion Implantation And Bombardment, Rustam Ummatkulovich Elmurodov, Shovqi Kulaganovich Niyazov, Gulom Bazarboevich Samatov, Abdurahmon Abdullaev, Ilhom Maripov

Bulletin of Gulistan State University

The article explains that by methods of ion implantation or bombardment it is possible to inject foreign impurities into the crystal lattice of metal substrates. For this purpose, a special experimental setup with a high vacuum condition is used. Under normal conditions, atoms or molecules of the atmosphere interact with the surface of solids. As a result of the diffusion process, atoms or molecules of the atmosphere penetrate into the near-surface region, into the crystal lattice of solids and form a connection of some type. Usually, this diffusion process occurs very slowly and for a long time, as a result, …


Protection Of Plants For Years In The Plantations Of Ferula Tadshikorum Pimenov, Moxira Asatullaevna Khalkuzieva, Umarqul Rahmonqulov Dec 2020

Protection Of Plants For Years In The Plantations Of Ferula Tadshikorum Pimenov, Moxira Asatullaevna Khalkuzieva, Umarqul Rahmonqulov

Bulletin of Gulistan State University

This article provides a brief biology of the Tajik kovrak (F.tadshikorum Pimen.) And information on the establishment of plantations in the arable lands of Arnasay district of Jizzakh region in 2015-2019 by sowing seeds of the plant from different regions. The experiment was of two types: Option 1, in which the soil was well tilled, plowed, and then sown, and Option 2 was chiseled and then sown in seedbeds. It was found that planting resin-bearing husks in plowed areas gave better results than in chisel-planted areas. In both cases, the number of fragile seedlings has been declining over the years. …