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118-120 143 0

Экстракция лантаноидов средне-тяжёлой группы экстрагентом на основе CYANEX 272 И P507

I Yakimenko

Научно-технический прогресс, достигнутый за последние годы в народном хозяйстве во многом обязан успешному применению материалов, в основе которых лежат редкие элементы и редкоземельные элементы (РЗЭ). Современное использование РЗЭ связано в основном с такими областями их применения, как катализаторы, магниты и материалы автомобильной промышленности. Одним из наиболее широко используемых методов разделения РЗЭ является жидкостная экстракция. [1]

108-109 128 0

Химический, минералогический и гранулометрические составы кварц - полевошпатовых песков кызылтуйского месторождения

M Yunusov, Z Babaev, Sh Matchonov, M Abdullaeva, M Shomurotov

Основным носителем оксидов железа в производстве стекла являются кварцевые пески. Согласно ГОСТ 22551-77 стекольные кварцевые пески классифицируют на 15 марок, различающихся содержанием основного вещества и примесей, прежде всего оксидов железа[1].

1-22 80 0

Марказий Осиё сейсмик фаол ҳудудларидаги ер ости сувларида гелий намоён бўлишининг ўзига хос ҳусусиятлари

Nasriddin Ziyavuddinov

Тадқиқот объектлари: Марказий Осиёнинг сейсмик фаол сриклар зоналари.
Ишнинг мақсади: Марказий Осиё срости сувларида гслийнинг тақсимланиши хусусиятларини ва уни зилзилаларни прогноз қилишда қўллаш имкониятини аниклаш.
Тадқиқот методлари: Барча вазифалар гелийнинг срости сувларидаги мутлақ микдорини мажмуали тахлил этишнинг муаллиф томонидан ишлаб чиқилган усули асосида счилган. Гелий микдорини ўзгариши қонуниятларини ва табиатини аниқлаш, ҳамда зилзилаларни прогноз қилишда инструментал-аналитик усуллар кўлланилган.
Олинган натижалар ва уларнинг янгилиги: Биринчи маротаба Марказий Осиёнинг геологик-тектоник шароитлари учун срости сувларида гелийнинг эркин микдорини аниқлаш усули ишлаб чиқилган. Регионнинг турли гидрогеологик шароитлари учун алоҳида геодинамик полигонларда гелийнинг мутлақ микдори ўрганилган. Геологик-гидрологик майдонларда гелий аномалияларининг фазо-макондаги конуниятлари сейсмопрогноз мониторингни ташкил этиш ва уларни табиий генезисини баҳолаш учун гелийнинг вариациялари асосида ажратилган. Гслийнинг срости сувларида тарқалишининг хусусиятлари ўрганилган ва уларнинг юкори микдори узилишли бузилишлар зоналари ва блоклар чсгараларида кузатилиши аникланган. Ушбу худудлар учун биринчи марта гелийнинг срости сувларидаги микдори аномалиялари ва уларни зилзилаларни тайёрланиш парамстрлари билан богликлиги коррсляцион боғлиқликлар бўйича баҳоланган.
Амалий ахамияти: Гелийнинг срости сувларидаги микдорини ўрганиш бўйича муаллиф томонидан ишлаб чиқилган усул зилзилаларни прогноз қилишда сейсмопрогноз кузатувларни сифатини сезиларли оширади.
lyruiri vvri 11 v j i\j jui j ujiu|jiiii vrivjyui iiiiii vvjMJiuy;in vluii
Татбиқ этиш даражаси ва иқтисодий самарадорлиги: Ишлаб чиқилган усул Узбскистоннинг барча гео динамик полигонларидаги рсжимли кузатувлар амалиётига тадбиқ этилган ва Озарбайжон, Қирғизстон, Арманистон, Туркманистондаги турдош ташкилотларда қўлланилади. Улар шунингдек УзР ФА Сейсмология институтининг хафталик Прогноз комиссияси маълумотларида қўлланилиб, унинг натижалари ва хулосалари Узбекистан Рсспубликаси Фавқулодда вазиятлар вазирлигига юборилади.
Қўлланиш (фойдаланиш) сохаси: Геофизика, сейсмология, зилзилаларни прогноз қилиш, келгусидаги зилзилалар зоналарини аниклаш.

128-129 162 0

Исследование процесса получения гидроксида калия из хлорида калия в мембранном электролизёра

F Chavlieva, B Kucharov, A Erkaev, A Khamidov, B Turakulov, M Kushakov

Производители жидких мыл, косметики, лекарственных средств и других продуктов в Узбекистане нуждаются в дешёвом гидроксиде калия, который можно производить из местного хлорида калия, производимого в АO “Дехканабадский калийный завод”

120-122 110 0

Исследование процесса подогрева нефтегазоконденсатной смеси парами легкой нафты в теплообменном аппарате 10Е04

Sh Rakhimzhanova, Kh Manazarova, S Nodirkhonova

Для подогрева сырья в нефтеперегонной установке используются горячие технологические потоки, выходящие из ректификационной колонны - дистилляты топливных фракций и мазута [1-4]. Для подогрева углеводородного сырья на НПЗ в основном применяют трубчатые теплообменные аппараты [2;4;5;6].

54-63 171 0

Инновационный подход к переработке серпентенита в Узбекистане

G Usenova, T Pirimov

В статье приведены результаты исследования процессов получения оксида магния путем разложения серпентинитов Арватенского месторождения серной кислотой и с добавкой азотной кислоты в раствор серной кислоты последуюшим разделением кремнезема из суспензии, нейтрализацией фильтрата аммиаком до значения рН 8,5 для осаждения и раздаеления ионов примесных металлов, осаждение и разделения ионов магния из раствора с использованием аммиака и углекислого аммония, термическое разложение корбаната магния с получением оксида магния. Установлено, что использования смесь кислот т.е. с добавкой небольшой количества азотной кислоты в раствор серной кислоты увеличиваеть выход оксид магния от 83,34% до 92,68 % чем при использования только серной кислоты при одинрковых нормах. При оптимальных условиях после термического разложения карбоната магния получен продукт содержащый 97,13% оксид магния со степенью извлечения 92,68 % от исходного сырья.

240-241 106 0

Динамика микробного сообщества как индикатор интенсивности и направленности почвообразовательных процессов под воздействием гуминовых удобрений

O Myachina, L Mamasalieva, R Kim, B Pulatov, A Rakhmonov, O Narzullaev

Поскольку почвенная экологическая среда сложна, внесение удобрений, и дальнейшее их быстрое растворение, а также распространение в пахотном слое может привести к изменениям в устойчивых почвенных микроценозах.

11-15 48 0

Гипс қолип массаларининг таркиби ва хусусиятлари

Salmonkhan Yuldashev, М Мирзажанов , M Numonov

The properties of gypsum mixtures prepared on the basis of α-and β-calcium sulfates hemihydrates were studied. The strength and structural properties of mixtures are determined depending on their composition and the type of plasticizing additives.

1-49 61 0

Working out of technology of reception bischofit from lakes Karaumbet and Barsakelmes

Rustambek Tojiev

The aim of the research work is the physical and chemical substantiation and working out of comprehensible technology of complex processing leach deposits Karaumbet and Barsakelmes to bischofit with reception myrabilit, plaster, a chalk and halite, using in quality desulfonation reagent distiller liquids - withdrawal UE «Kungrad soda factory».
The scientific novelty of dissertational research consists in the following:
for the first time, scientifically grounded data on the complex processing of the brine of Karaumbet and Barsakelmes lakes for magnesium chloride with simultaneous utilization of the distillation liquid - waste of soda production;
the influence of climatic factors of the region and evaporation on changes in wound composition;
the patterns of influence of technological factors on the degree of desulfuration, the rheological properties and composition of brine;
the technical solutions allowing to increase the degree of purification of desulfurized brine from residual amounts of sulphates and calcium;
developed a comprehensive and effective technology for processing the brine of Karaumbet and Barsakelmes lakes for magnesium chloride with the associated production of gypsum, calcium carbonate, halite.

1-48 96 0

Ways of increasing of nitrogen fertilizer use efficiency on cotton in the belt with irrigated sierozem soils

Nazirbay Ibragimov

Subject of the inquiry: An old irrigated typical sierozem soil, an irrigated meadow alluvial soil, cotton crop, labeled and non-labeled nitrogen fertilizer, manure, furrow irrigation, drip irrigation, polyethylene film, mulch.
Aim of the inquiry: Regulation of transformation processes of soil and fertilizer nitrogen in accordance with requirements of cotton plant in the belt of irrigated sierozem soils.
Method of inquiry: Field, lyzimeter and pot experiments with cotton were conducted in accordance with “Methods of field experimentation with irrigated cotton” (Uzbekistan Cotton Growing Research Institute, 1973, 1981). Chemical analyses of soil and plant samples were performed according to "Methods of agrochemical analyses of soil and plants" (Uzbekistan Cotton Growing Research Institute, 1963, 1977). Relative growth rate of cotton stem and dry mass accumulation were determined as suggested by D. 13. South (1991). Relative growth rate of nitrogen productivity was calculated according to P. Poorter (1989). Data were subjected to analysis of variance using PROC GLM procedures in SAS (SAS Institute, 2003).
The results achieved and their novelty: The qualitative data on soil nitrate content as well as the N-total concentrations in cotton leaves allowed for the differentiation and thus improvement of the nitrogen fertilizer application norms and timing for cotton growth.
Fertilizer nitrogen recovery in cotton was determined by l?N methods both for cotton grown with a mulch of polyethylene film and combined with various timings of nitrogen application, different nitrogen quantities and under different irrigation modes including drip and furrow irrigation.
The impact of nitrogen quantities applied during planting on the germination of cotton seeds and stand establishment was researched. The content and dynamic of all soil mineral nitrogen forms were investigated. In addition, estimated was the quantitative ratio of available soil NPK throughout the cotton vegetation period, the relative growth rate of nitrogen productivity, cotton growth and development, and cotton yield depending of the nitrogen application timing while cotton was grown w ith the use of polyethylene film.
Mineralization and immobilization processes of nitrogen in the soil and the fertilizer nitrogen l5N balance was investigated under various ratios of manure carbon and with different brands of fertilizer nitrogen. Results showed that the optimal C:N ratio was obtained with the combination of cow-dung carbon + nitrogen of mineral fertilizer + manure applied, which was reflected in an improved availability of plants nutrients content in the soil, which in turn increased cotton yield and the quality of the cotton lint.
The transformation of mineral forms of soil nitrogen, NPK uptake and dry mass accumulation by plants, as well as cotton yield quantities and quality were investigated subject to various nitrogen rates and application timing combined with different irrigation technologies, irrigation methods and modes.
Practical value: Based on the results following implications options could be elaborated:
- A method for a refined use of nitrogen fertilizers application both in terms of quantities and timing on cotton which is based on the nitrate content in the soil (for automorphyc soils only) and on the nitrogen concentration in plant leaves which is applicable for all soil types;
- nitrogen fertilizer application methods for various irrigation technologies used in cotton production (alternate irrigation during whole vegetation);
- efficient method of a combined application of nitrogen fertilizer and manure on cotton, which lowered the use of nitrogen fertilizer rate by 30% and concurrently increased the scope of usage for organic fertilizer;
- nitrogen fertilizer application timing on cotton when cotton is grown with the use of polyethylene film.
Degree of embed and economic efficiency: The results of the investigations formed the scientific basis for the development of “Practical recommendations in agriculture: soil, water, fertilizer” (in Russian, MAWR, Tashkent, 1996. - 108 p.), “Recommendations on production of high and qualitative cotton yield in Tashkent Province” (in Uzbek, UzSPCA, Tashkent, 1996. - 16 p.), Recommendations on the use of mineral and organic fertilizer in cotton growing” (in Uzbek, UzSPCA, Tashkent, 2003. - 24 p.). Practical recommendations as presented in this thesis were included in various provinces of the country but on a total area of 80,000 hectares. Hence this would lead to a net profit varying from 48,826 to 215,981 sums ha'1 caused by the recommendations
Sphere of usage: Farmers units specialized in cotton production in the belt of the irrigated sierozem soils.

1-53 80 0

Vertebrate animals of Southern Aral Sea in conditions of anthropogenic transformation of their habitat

Muratbay Jumanov

The aim of the research work is to make an inventory of quantitative and qualitative composition of the biodiversity of ground vertebrates in various ecosystems of the South Aral Sea region, to reveal the structure of the population and study the ecological adaptation of birds and mammals to the conditions of the anthropogenic habitats.
Scientific novelty of the research is as follows:
It has been estimated that the modern specific difference of the vertebrates of the the South Aral Sea region consists of reptiles - 33 species, birds - 317, mammals - 67 species;
The index numbers of the studied group of animals has been established for the first time through the Kyzylkum, Usturt regions and the Lower Amu-Darya and has been comparatively rated of the conditions of habitats of the Aral ecological crisis;
For the first time large breeding colony of Flamingos (Phoenicopterus roseus) have been studied in Sudochi lake systems in Uzbekistan and the peculiarities of its breeding biology;
For the first time the peculiarities of omitho-fauna of artificial saxaul plantations on dried bottom of the Aral Sea have been established;
It has been found out the influence of drying-out of the Aral Sea on the reduction of specific diversity, slackening of gene pool, disturbance of aged numerical recurrence of mass animal species;
It has been revealed the decrease in fertility of polyestral species of small mammals in the Kyzylkum and in Usturt in different periods of ecological crisis.

115-117 106 0

The kaolin of khujakul mine and the results of its enrichment by physical-mechanical method

Z Babaev , Sh Matchonov , A Ruzmetovа , Yu Yakubov , D Davletova

The ability to obtain valuable raw materials such as kaolin, metakaolin, quartz sand and obtain a number of materials necessary for the national economy by introducing the technology ofenrichment of mineral raw materials available in our republic, which meets the requirements of the time, was successfully tested in laboratory and semi-production conditions.

1-38 83 0

The Evolution of depositional environments and composition of marine Paleogene formations of Kyzyl Kum

Abdurazak Mirzaev

Subjects of research: paleogene sedimentary formations of Kyzyl Kum.
Purpose of work: comprehensive study of the conditions of deposition and composition of sedimentary formations of Paleogene of Kyzyl Kum with definition of key stages in the evolution of a sedimentary basin, establishing patterns of facies changes in units of time and space and the identification of a genetic connection with the formation of mineral deposits.
Methods of research: stage dynamic principle of facial analysis of sedimentary formations and the complex layering and biorhythmostratigraphical differentiation and correlation of the sections, facial analysis of differentiation of sediment on a range of hydrochemical conditions defining the hydrochemical composition of the water basin, reductive-oxidative and acid-base indicators.
The results obtained and their novelty: identified five stages of evolution of the Paleogene sedimentary basin. It is established that the change of transgressions and regressions of Paleogene marine basin is related to global causes - of eustatic changes in sea level. Clarified biorhythmostratigraphical definition and correlation of Paleogene sections of the region. Selected dynamic facial units. For the first time identified: sulfate-dolomite chemical, calcareous biochemical and bentonite physical-chemical facies, reflecting the specific environmental conditions of sedimentation.
Practical value: opened deposits of alkaline bentonite and carbonate palygorskite clays of Navbahor, white mealy dolomites of Vaush, manifestations opoka clays Kokcha, pelitomorphic dolomites of Amantaytau.
Degree of embed and economic effectivity: on the basis of Navbakhor deposit built a plant of mud powder with capacity of 40 tons per year. Products manufactured by the enterprise are the import- and export-oriented.
Field of application: regional forecast on the basis of stratigraphic, facies, mineral and geochemical criteria, the search and evaluation of deposits of non-metallic materials.

1-31 70 0

Taking on social development aspects of Uzbekistan’s villages: conditions and problems (As an example of Kashkadarya and Surkhandarya regions. 1991-2008 year.)”

Charos Temirova

Subject of the research: this research’s object is government’s politics on social development in the villages of Uzbekistan’s southern regions during Uzbekistan’s Independence.
Purpose of work: Uzbekistan’s social politics in the villages of southern regions during Indcrcndcnce and accomplished practical works on cultural spheres. Analyzing their results and making conclusions.
Methods of research: while carrying out this research following characters were in use: historicalness, scientific impartiality, running collected materials, historical-comparative analyses.
The results achieved and their novelty: in the Kashkadarya and Surkhandarya (1991-2008) regions’ social and cultural state, appeared complications in this field, oppositions, and social living conditions learned, analyzed and sufficient conclusions implemented.
Practical value: dissertation information and conclusions could be applicable to do research on Uzbekistan’s history science problems, upbringing generation in a patriotic manner, epistle, and monograph in Uzbekistan’s history science and to write textbooks and learning method manuals.
Degree of embed and economic effectivity: the dissertation’s main content emphasized and reflected bu the author the dissertation, they arc: 4 printed scientific articles, 1 methodical handbook, and 7 attended conferences.
Field of application: the research attainments give the opportunity to use the research achievements to establish information about studying Uzbekistan’s Indcrcndcnce period, printing, and providing.

1-27 123 0

Syntheses, study and using import substituting spume for flotation enrichments copper-molybdic ore

Shukhrat Bukhorov

Subject of research: moleskin and efire alleged factions, ethyl and izoamile alcohols, cretonne alleged, foamy, copper-molybdic ore, spume.
Purpose of work: reception, study characteristic and using import substituting spume for flotation enrichments copper-molybdic ore.
Methods of research: physic-chemical and chemical tests, IR-spectroscopic, PMR- study, paper chromatography, mathematical and steady-state analysis.
The results obtained and their novelty: on base individual material, as well as secondary raw materials resource local chemical production is received row superficially an active material (PVA), explored their characteristic (spume, superficially-active, efficiency spume action under flotation enrichment copper-molybdic ore and others), characteristic solution, as well as possibility of the efficient practical application as spume under flotation an enrichment sulfide ore.
Practical value: synthesized PAV recommended for practical application under flotation enrichment copper-molybdic ore as efficient import substituting foamy reagent.
Degree of embed and economic affectivity: efficiency of the using synthesized PAV as foamy under flotation enrichment copper-molybdic ore practiced in condition JSC "Almalyk is blazed-metallurgical combine", are received positive results. Expected annual economic effect from introducing the development will form on reagent TMSB 900 mln.sum/year, and on EAFK 740 mln.sum/year, it will provide import substituting and spare exchange facilities of the Republic.
Field of application: is blazed-metallurgical industry.

1-50 53 0

Substantiation of calculated characteristics of embankments of earthen cloth from saline soils

Rashidbek Khudaykulov

The aim of the research work is justification of the design characteristics of the embankments of the roadbed from natural and stabilized saline soils.
Scientific novelty of research work consists in the following: improved existing design solutions for determining the estimated road surface performance of saline soils located throughout the territory of Uzbekistan; functional dependence of the road surface layer on saline soils on the number and type of salts contained in it was revealed; method of determining the saline soil moisture level in the road surface layer has been improved; method for improving structural relationships and properties of saline soils with surface-active treatment.

118-120 101 0 0

Study boring the bore holes of the big diameter on alluvial deposits useful fossilized

S Abdullaev
In Uzbekistan’s quarries and mines, the use of modern drilling equipment with hydraulic impact actuating equipment is increasingly being used, which in turn raises the question of establishing optimal basic technological dependencies and modes of hydraulic impact drilling in specific mining and geological and mining and technological conditions of field development
1-41 84 0

Structure and lateral heterogeneity of the Jurassic section of Bukhara-Khiva region supported by the geophysical data

Shukhrat Radjabov

Subject of the research: Jurassic sediments in Bukhara-Khiva region.
Purpose of work: development of the methodology of integrated interpretation of geological and geophysical data, and its application in studying formations, structure and composition of the Jurassic section of Bukhara-Khiva region, including treatment of the new conception of the geological evolution of sedimentary basin, and identification of lateral heterogeneities.
Methods of research: Integrated analysis of geological and geophysical materials, including drilling data, well logging data, seismic data, and also developed methodology of integrated interpretation of geological and geophysical data, including mathematical modeling of seismic wave fields.
The results obtained and their novelty: New scheme of the methodology of integrated interpretation of geological and geophysical data including mathematical modeling of seismic wave fields has been proposed. Cyclostratigraphic and seismic stratigraphic division of the Jurassic section. The history of geological evolution of Bukhara-Khiva region in the Jurassic time has been studied.
Practical value: Developed methodology of integrated interpretation of geological and geophysical data can be applied in detailed study of geological structure of other prospective oil and gas areas with similar geological and tectonic settings. Based on conducted seismic formation analysis and other a priory information, the zones with prospects for finding oil and gas traps have been identified.
Degree of embed and economic effectivity: Developed methodology of integrated interpretation of geological and geophysical data has been introduced in the educational process in the faculty of Geology in the National University of Uzbekistan. The recommendations were given on conducting detailed seismic acquisition works, within discovered prospect areas, aimed at finding traps and pools of hydrocarbons.
Field of application: oil and gas sector of the Republic of Uzbekistan, exploration organizations, and system of education.

1-25 74 0

Social-economic and geographical peculiarities of area on formation of place names

Қuchkor Ҳakimov

Subjects of the inquiry: The geographical peculiarities of the names of population spots and the area toponyms of Djizak Region.
Aim of inquiry: Develop scientific-practical recommendations on regulations of region oykonims on the grounds of the analysis of area peculiarities in formation of geographical names.
Methods of inquiry: Geographical contrasting, historical comparison, etymological analysis, experiment, etc.
The results achieved and their novelty: Research includes learning of effects of economic- social geographical peculiarities of area on formation of place names; rules of naming of population residence areas and their geographical features have been identified. The differences among the names of population residences situated on mountain and desert territories have been analyzed and elucidated within district scales; oykonims of Djizak region have been for the first time learned through lingo-geographical point; there have been made some recommendations on naming new developing population residence places in the region.
Practical value: Research results can be applied in naming population residence places of the region, in creating new place names and in national standardization and transcription of toponyms. Besides, the analytical results and methodological issues are also of much significance in the teaching process of Higher Education.
Degree of embed: The main results, recommendations and summaries have been accepted for usage by toponymy commission under Djizak region authorities. The data and the scientific attitudes of the thesis are being applied in teaching toponymy in Djizak State Pedagogical Institute.
Sphere of usage: Djizak Region, City and District Authorities; Higer Educational Institutions.

1-48 86 0

Seismodynamics of underground pipelines with complex conditions of interaction with soi

Diyorbek Bekmirzaev

The aim of the research work is the development of a technique for calculating the seismodynamics of underground pipelines with complex conditions of interaction with soil.
Scientific novelty of the research work consists in the following: solution techniques for wide application of approximate numerical methods to the problems of seismodynamics of underground pipelines are improved; a technique for calculating stress-strain state (SSS) of underground pipelines under longitudinal oscillations is developed, it takes into account the linear and nonlinear interactions in “pipe-soil” system; a technique for calculating stress-strain state of complex systems of underground pipelines under the influence of seismic loads with distributed masses is developed; a technique for calculating stress-strain state for pipeline systems of orthogonal and non-orthogonal configurations is developed for an arbitrary direction of seismic loads.

1-60 74 0

Scientific foundations of genesis, agrophysical and agrochemical properties, increasing the productive capacity of the sands of Central Fergana

Sanoatkhon Zakirova

The aim of the research work is to increase the productive capacity of the sands of Central Fergana, to improve anti-erosion technologies, and to develop new agrotcchnologies for the care of crops.
Scientific novelty of the research workis as follows:
For the first time, the improvement of agrophysical and agrochemical properties as well as nutritive regime of sand areas with a natural screen as a result of leaving of rye stubble of 14-15 cm height is proved;
The increase in yields of cotton and other crops included in the cotton complex on deflated hilly-barkhan and sandy lands is determined underapplication of effective norms of mineral and organic fertilizers;
The technology of water saving and improvement of the ecological and reclamation state of sandy lands by creation of natural and artificial screens is developed;
It is determined that as a result of creating natural screens in cotton fields of farms, the cotton boll are opened for 3-4 days earlier compared to conventional method;
A technology has been developed for the use of drainage and irrigation ditch deposits through measures aimed at improving the ecological state of the environment.

1-60 92 0

Scientific foundations of genesis, agrophysical and agrochemical properties, increasing the productive capacity of the sands of Central Fergana

Sanoatkhon Zakirova

The aim of the research work is to increase the productive capacity of the sands of Central Fergana, to improve anti-erosion technologies, and to develop new agrotechnologies for the care of crops.
Scientific novelty of the research worlds as follows:
For the first time, the improvement of agrophysical and agrochemical properties as well as nutritive regime of sand areas with a natural screen as a result of leaving of rye stubble of 14-15 cm height is proved;
The increase in yields of cotton and other crops included in the cotton complex on deflated hilly-barkhan and sandy lands is determined underapplication of effective norms of mineral and organic fertilizers;
The technology of water saving and improvement of the ecological and reclamation state of sandy lands by creation of natural and artificial screens is developed;
It is determined that as a result of creating natural screens in cotton fields of farms, the cotton boll are opened for 3-4 days earlier compared to conventional method;
A technology has been developed for the use of drainage and irrigation ditch deposits through measures aimed at improving the ecological state of the environment.

1-19 98 0

Research of photoelectric and magnetic properties of silicon with nanoclusters atom of manganese

Giyosiddin Mavlonov

Subject of research: monocrystal samples of silicon of mark КДБ - 2, 5, 10, 100 which have been doped impurity atoms of manganese.
Purpose of work: working out of technology of reception of silicon with nanoclusters impurity atoms of manganese with steer able charging condition status and the magnetic moment, and also research of their properties and definition functional possibility for usage of such materials in modem electronics.
Method of research: electric, photo-electric methods, device of an electron spin resonance (ESR), atomic force and infra-red microscopes were used.
The results obtained and their novelty: for the first time effects arc found out: it is anomalous high-tcmpcraturc negative magnetoresistance, giant impurity photoconductivity in the field of A.=1,54-8 microns, it is anomalous infra-red quenching of photoconduction. Laws of change obtained effects from size electric arc established and magnetic field, temperatures intensity of lighting.
Practical value: the technology of reception of silicon with nanoclusters atom of manganese steer able charging condition status and concentration is developed. Possibility of creation on the basis of silicon with magnetic nanoclustcrs new type sensitive magnetic sensors, on the basis of NMR and IR photodetectors working is shown at presence enough high levels of background light.
Degree of embed and economic effectivity: the results received in work can be introduced on Open Society "PHOTON" and on chair «Electronics and microelectronics» TSTU in educational process.
Field of application: the microelectronic industry, in area use renewed energy sources.

1-55 109 0

Pollution of steppe soils of southern regions of Uzbekistan with oil and petroleum products and it is reclamation

Zafarjon Djabbarov

The aim of the research work distinguish the difference between the sources of pollution of soils of desert region of the southern region of Uzbekistan by oil and oil products, and to develop biological treatment method.
Scientific novelty of the research work:
for the first time the distances on the pollution sources of several soil types of arid zone polluted by oil and oil products and the differences on soil profiles were revealed;
changes in the organic and anthropogenic carbon, and humus contents of the soils polluted by oil and oil products were studied;
created recultivation technology of combined application of the strains of MFD-100 Pseudomonas stutzeri, MFD-200 Pseudomonas caryophyllis, MFD-5000 Bacillus subtilisfox the arid zone soils polluted by oil and oil products;
developed the individual factors, algorithm and stages of recultivation of the soils polluted by oil and oil products, and done periodization of recultivation process;
rehabilitation parameters and coefficients of soil fertility after recultivation of the soils polluted by oil and oil products were developed.

1-23 88 0

Platinum-bearing of silver - and gold ore deposits of Almalyk-Angren ore area

Erkindjon Igamberdiev

Subjects of research: silver- and gold ore deposits of Almalyk-Angren ore area and accompanying them platinum and platinoids in fine admixture.
Purpose of work: studying of silver- and gold ore deposits of Almalyk-Angren ore area for platinum-bearing.
Methods of research: mineralogical, geochemical, crystallomorphological, as well as mass spectrometer, electron probe, atomic adsorption.
The results obtained and their novelty: for silver and gold deposits it is established accompanying platinum-bearing. Forms of platinum and platinoids are mainly in fine admixture. Total content of platinum and platinoids is from less than 1 to 2,5-3 ppm and more (on the average 1,10 ppm). Relatively high content is typical for Pd, «light» platinoids (Pd, Rh) and platinum prevail. It is revealed earlier unknown precious metal (Au, Pd, Rh) type of exogenetic mineralization for the Yusuptash area.
Practical value: mineralogical-geochemical research ofAg- and Au deposits increases a practical importance of their nontraditional platinum-bearing. The materials of researches can be used for perfection of technology of frill extraction of useful components and as an additional source of reception of platinum and platinoids at a complex working off of ores.
Degree of embed and economic effectivity: results of research are transferred in the form of the report to the State Committee on Geology and Mineral Resources of the Republic of Uzbekistan (ref. № 65 from 26.06.2008) with a priority of authorship of opening of precious metal mineralization that was unknown (perspective) before. Scientific and practical results are introduced to Open Society «Sharqiy Qurama» (the certificate about acceptance to use from 03.08.2009), the Tashkent chemical-technological institute (TCTI) to the chair of «Analytical chemistry and technology of precious metals» (the certificate of introduction from 27.01.2010), Open Society «Uzbekugol» (the acceptance certificate on introduction from 09.02.2009), SE «Geological museum» of State Committee on Geology and Mineral Resources of the Republic of Uzbekistan (an extract from the report on reception to introduction and use №4 from 09.06.2008 and the certificate of introduction from 12.01.2009). The part of materials of work and the methodical manual of the author «Typomorphism and crystallomorphological analysis of pyrites» is used on the lectures and practical trainings at the Geology faculty of NUUz and TCTI.
Field of application: the perfection of the technology of useful components’ extraction and additional reception of platinum and platinoids.