OAK jurnallaridan yig‘ilgan 140147 ta ilmiy maqola: sarlavha, mualliflar, annotatsiya, kalit so‘zlar, DOI va tayyor iqtibos formatlari.
- Synthesis and Inhibitory Properties of Imines Containing Monoterpenoid and Adamantane Fragments Against DNA Repair Enzyme Tyrosyl-DNA Phosphodiesterase 1 (Tdp1)
А. Л. Захаренко, Evgenii S. Mozhaitsev, Е. В. Суслов, Д. В. Корчагина, Константин П. Волчо, Нариман Ф. Салахутдинов, Olga I. Lavrik · Химия природных соединений · 2018-07-01
- Diketopiperazine Alkaloids and Steroids from a Marine-Derived Pleosporales sp. Fungus
Yan Xu, Ao Zhu, Fei Cao, Yunfeng Liu · Химия природных соединений · 2018-07-01
- A New Aristolactam Alkaloid from Michelia compressa var. compressa
Chien‐Liang Lin, C. L. Kao, W. J. Li, H. T. Li, C. Y. Chen · Химия природных соединений · 2018-07-01
- Seed Lipids from Pulmonaria obscura
S. G. Yunusova, Marat S. Yunusov, Н. И. Федоров · Химия природных соединений · 2018-07-01
- Synthesis of Betulonic and Betulinic Acids from Betulin
M. P. Yakovleva, В. А. Выдрина, R. R. Sayakhov, G. Yu. Ishmuratov · Химия природных соединений · 2018-07-01
- Chemical Constituents of Afzelia xylocarpa
Xu Cai, Jiaxiang Liu, Qishi Song, Keli Chen, Zhiyuan Lu, Yumei Zhang · Химия природных соединений · 2018-07-01
- Phytotoxic Secondary Metabolites from the Endolichenic Fungus Myxotrichum sp.
Chao Yuan, Gang Ding, Haiying Wang, Yuhua Guo, Xiaojun Ma, Zhong‐Mei Zou · Химия природных соединений · 2018-07-01
- Triterpene Saponins from Branches of Pinus massoniana
Rui Wang, Kai Wang, Chuanling Si, Yan-Yan Luo, Wei Liu, Xinxing Zhang, Yuyang Tian, Junhui Wang · Химия природных соединений · 2018-07-01
- Minor Ecdysteroids from Rhaponticum uniflorum Leaves from Eastern Siberia
Д. Н. Оленников · Химия природных соединений · 2018-07-01
- Chemical Constituents of Seed Oil Leavings of Xanthoceras sorbifolia
Lili Yu, Lili Yu, Jiachuan Liu, Liquan Yu, Liquan Yu, Lixia Chen, Feng Qiu · Химия природных соединений · 2018-07-01
- Ergostane Steroids from Coprinus setulosus
Qing‐Yun Ma, Shuang Yang, Sheng‐Zhuo Huang, Fan‐Dong Kong, Qingyi Xie, Hao‐Fu Dai, Zhifang Yu, You‐Xing Zhao · Химия природных соединений · 2018-07-01
- Free Carbohydrates, Glucofructans, and Other Polysaccharides from Rhaponticum uniflorum
Д. Н. Оленников · Химия природных соединений · 2018-07-01
- A New Fawcettimine-Related Alkaloid from Lycopodium japonicum
Qian Yang, Yuquan Zhu, Rui Zhan, Yegao Chen · Химия природных соединений · 2018-07-01
- Quinazolinones Isolated from Aspergillus sp., an Endophytic Fungus of Astragalus membranaceus
Rui Liu, Hui Li, Junxia Yang, AN Zhi-peng · Химия природных соединений · 2018-07-01
- Chemical Constituents of the Roots of Cinnamomum randaiense
Chien Liang Lin, M. H. Perng, W. J. Li, H. T. Li, C. Y. Chen · Химия природных соединений · 2018-07-01
- A New cis-Caffeoyl Coumarin Glycoside from the Stem Barks of Fraxinus depauperata
Yanyan Luo, Liqiu Hu, Junhui Wang, Tingwu Liu, Lin Sun, Shujun Han, Jiahui Shen, Chuanling Si, Weicheng Hu · Химия природных соединений · 2018-07-01
- Diterpene Alkaloids from Aconitum smirnovii
Bo Zhao, Jiaheng Zhao, Ш. Ш. Сагдуллаев, H. A. Aisa · Химия природных соединений · 2018-07-01
- LC-MS/MS Identification of Novel Saponins from the Viscera of Sea Cucumber Apostichopus japonicus
Xuanming Zhang, Xiaobin Li, Shanshan Zhang, Qiuxia He, Hairong Hou, Li Dang, Jing-Lan Guo, Yufeng Chen, Yu Tao, De-Jie Peng, Liwen Han, Kechun Liu · Химия природных соединений · 2018-07-01
- Chemical Constituents of Streptocaulon griffithii
Xiaowei Zhang, Kuiwu Wang, Hong Wang · Химия природных соединений · 2018-07-01
- Secondary Metabolites From the Stems of Cinnamomum kanehirai
Chien Liang Lin, C. L. Kao, W. J. Li, H. T. Li, C. Y. Chen · Химия природных соединений · 2018-07-01
- Analysis of energy performance of ferrous metallurgy enterprises based on the scheme of decomposition
I U Rakhmonov · Тошкент давлат техника университети хабарлари · 2018-06-11
The task of determining specific electricity consumption is complex, as it is necessary to take into account a large number of factors affecting the energy indicators that determine the level of these indicators. At the…
- Organization of the english teaching process
Irrigatsiya va melioratsiya jurnali · 2018-06-01
Article deals with the methods of teaching English language. Also, the author introduces the methods of learning the vocabulary without translation, with giving their definitions, analyzing the speech patterns and…
- Experience of the basin water management assocoation of the syrdarya to create a database period
Norkobul Rakhmatov · Irrigatsiya va melioratsiya jurnali · 2018-06-01
The Syrdarya water basin association is an intergovernmental coordinating organization which is part of the interstate commission (ICWC) on Aral Sea rescue in the role of "Executor". Transboundary waters are distributed…
- The economy of water resources with the use of polymer complexes in irrigation of a cotton
Mukhamadkhan Khamidov, B. Suvanov, K. Khamroev · Irrigatsiya va melioratsiya jurnali · 2018-06-01
The article deals with the use of polymer complexes in alluvial-meadow soils under the pre-determined humidity of 70-80-65% of the maximum field moisture capacity, in the second option with the 1-2-1 scheme in the…
- Effect of mungbean repeated culture on cotton vegetables under conditions of southern zone of karakalpakstan
Lutfullo Mirzaev, Nazar Ibragimov · Irrigatsiya va melioratsiya jurnali · 2018-06-01
Investigations carried out under conditions of meadow alluvial soils in the southern zone of the Republic of Karakalpakstan have determined the effectiveness of various norms of mineral fertilizers (N160P100K75…
- The role of educational discipline "Method of teaching special discipline "In the preparation of masters to scientific and pedagogical activity
Z.Q. Ismoilova, П. М. Махсудов · Irrigatsiya va melioratsiya jurnali · 2018-06-01
The training of highly qualified specialists for various sectors of the national economy, as well as the training of pedagogical personnel for higher educational institutions, is the main task of the magistracy. At the…
- Selflessness is a factor in protecting of the source of life
X. Xamidov · Irrigatsiya va melioratsiya jurnali · 2018-06-01
This article presents ideas on the significance of the four most important elements, the sun, earth, water, air which play a unique role in the creation of nature, all living things as well as plants, animals and human…
- Мodernization technology repairing acentrifugal water pump
Sh. U. Yuldashev, Diana Abdumuminova · Irrigatsiya va melioratsiya jurnali · 2018-06-01
The article provides an overview of the principle of the pump D630-90, as well as methods for studying the real conditions of technical support to improve maintainability and optimize technological processes and…
- Modeling of nonlinear vibration problems with fluid flows through pipelines
F.J. Тurayev · Irrigatsiya va melioratsiya jurnali · 2018-06-01
In this paper, mathematical model of nonlinear vibration problems with fluid flows through pipelines have been developed. Using the Bubnov–Galerkin method for the boundary conditions, the resulting nonlinear…
- Equipment basis of performance of results of scientific research works
Akhrorkhon Khamidov, B. Suvanov, U. Djuraev · Irrigatsiya va melioratsiya jurnali · 2018-06-01
The article provides information on modern high-precision digital laboratory instruments obtained within the framework of the BioWat scientific project: The German Federal Republic (BMBF), sponsored by the Ministry of…
- Strain characteristics of soil and methods of their determination
Karim Sultanov, Pavel Loginov, Zulfiya Salikhova · Irrigatsiya va melioratsiya jurnali · 2018-06-01
The method to define strain characteristics of soil under dynamic loading is proposed based on the results of experiments on dynamic compression of soils on the device for dynamic loading in laboratory conditions; the…
- Influence of irrigation regime and fertilizer norms on the yield of "ANDIJAN-36", S-6524 varieties of average fiber cotton under the condition of typical seedic soilss
Akmal Shamsiev, Nurmamat Rajabov · Irrigatsiya va melioratsiya jurnali · 2018-06-01
On the condition of typical sierozem soils of Tashkent province the research were conducted to study the optimal irrigation and fertilizer application scheduling of Andijan-36 and S-6541 cotton varieties. The paper…
- Construction of wells of vertical draining from polyethylene pipes for improvement of the meliorative condition of irrigated land
Abirov R.A., Umida Sadikova, L.F. Uzakbayev · Irrigatsiya va melioratsiya jurnali · 2018-06-01
The filter cage is the main element of the water intake part of the vertical drainage wells, made of polyethylene pipes meets all the criteria for well design. The proposed design of the water intake part of the…
- Interrelation of chemical and fractional structures of river sediments
Aybеk Arifjanov, Lukmon Samiev · Irrigatsiya va melioratsiya jurnali · 2018-06-01
In this article, the mechanical and chemical compositions of river sediments are studied, the analysis of studies on the change in the chemical composition with a change in the mechanical composition of the sediments is…
- Study of the effect of relative humidity on the operating modes of the ionizer
Abdugani Rakhmatov, S.R. Namozov · Irrigatsiya va melioratsiya jurnali · 2018-06-01
When using electro-ionizers in the conditions of the fruit storage facilities, it is necessary to take into account the influence of environmental conditions of the electrical ionizers. A particularly important factor…
- New methods of accounting for vertical refraction with trigonometric liveling in the conditions of the republic of Uzbekistan
Abdusali Suyunov, U.A. Berdiculov, Sh.A. Suyunov · Irrigatsiya va melioratsiya jurnali · 2018-06-01
In the conditions of Uzbekistan, a simple and ordinary method of refraction is used to determine the relative elevations without vertical refraction coefficient or angle. Described that these methods require a two-sided…
- Calculation of energy parameters of an autonomous solar power plant in arnasay region
Юлдашев, У.Ю., Саттаров, С.А., Тайланов, Н.А., Самадов, М.X. · O‘zbekiston fizika jurnali · 2018-05-21
The purpose of our research is calculation of capacity and energy of an independent solar power station. Theoretical calculations of the basic power characteristics of the solar panels established in territory of…
- Highly efficient Nd:Cr:GSGG laser with side-pumping by solar radiation
Payziyev, Sh., Bakhramov, S., Makhmudov, Kh., Fayziev, A. · O‘zbekiston fizika jurnali · 2018-05-21
The possibility of achieving high efficiency of converting solar energy into laser radiation energy on the basis of the active element Nd: Cr: GSGG in the form of a thin slab allowing providing an effective heat output…
- To the question of generation of plasma flow by vacuum arc discharge and deposition of coatings
Арустамов, В.Н., Ашуров, Х.Б., Худайкулов, И.Х., Кахрамонов, Б.Р. · O‘zbekiston fizika jurnali · 2018-05-21
A concept is proposed of forming the effective generation of a plasma flux by a vacuum-arc discharge in a substrate, with the functional systems of initiation of a vacuum-arc discharge with the necessary…
- Time dependence of formation of heteromolecular structures in aqueous solutions of certain organic solvents
Гофуров, Ш.П, Коххаров, А.М., Бахрамов, С.А., Махманов, У.К., Исмаилова, О.Б. · O‘zbekiston fizika jurnali · 2018-05-21
For the first time, the refractometry method was used to determine optical characteristics and concentration features of aqueous solutions of tetrahydrofurane, dimethylformamide and ethanol. Refractive indices of…
- Some physical aspects of solar energy conversion
Абдурахманов, Г., Вахидова, Г.С., Маматкулова, С.А. · O‘zbekiston fizika jurnali · 2018-05-21
Conversion process of energy of solar radiation into electricity is analyzed from point of view of mass, charge and energy transport. It is shown that, as in all other kinds of energy sources, there are limitations for…
- Surface structural transformations observed in Si (111) and Si (100) during the formation of silicide films
Рысбаев, А.С., Нормуродов, М.Т., Бекпулатов, И.Р., Рахимов, А.М., Игамов, Б.Д. · O‘zbekiston fizika jurnali · 2018-05-21
The processes of formation of thin nanosized films of Ba silicides and alkaline elements during their low-energy and high-dose implantation in Si(111) and Si(100) have been studied using electron spectroscopy…
- Some characteristics of silicon film structures obtained by vacuum deposition
Абдурахманов, Б.М., Ашуров, М.Х., Ашуров, Х.Б., Каланов, М.У., Кучканов, Ш.К., Кутлимуротов, Б.Р., Максимов, С.Е., Ниматов, С.Ж. · O‘zbekiston fizika jurnali · 2018-05-21
The results of decreasing the epitaxy temperature up to 900−1100 K to produce sufficiently perfect films under vacuum deposition and by ion stimulation have been presented.
- Influence of heat treatment on electrophysical properties of nickel-doped silicon
Зайнабидинов, С.З., Тургунов, Н.А. · O‘zbekiston fizika jurnali · 2018-05-21
The influence of a thermal annealing on electric conduction of silicon monocrystals doped by nickel has been studied. Also, an analysis of the morphology of impurity microinclusions under the influence of heat treatment…
- Absorption of linearly polarized radiation in a size quantized well
Расулов, Р.Я., Расулов, В.Р., Эшболтаев, И., Мамадалиев, Н.С. · O‘zbekiston fizika jurnali · 2018-05-21
The absorption of linearly polarized light in a semiconductor dimension-quantized well related both to optical transitions between branches of light and heavy holes and between dimension-quantized subbands has been…
- Upgraded 1 meter telescope and science projects
Ehgamberdiev, Shuhrat A., Hojaev, Alisher S., Burkhanov, O., Yuldoshev, Q., Karimov, R., Mirzakulov, D., Zhao, Gang, Fan, Zhou, Jiang, Xiaojun, Wang, Wei, Chen, Yu-Qin, Liu, Yu-Jua · O‘zbekiston fizika jurnali · 2018-05-21
The article presents the latest status of the Maidanak 1 m telescope, instruments and the related facilities of the Observatory as well as the science projects. The renovation of the 1 m telescope of Carl Zeiss…
- Some problems of physics of the thermoelectric phenomena
Abdurakhmanov, Gulmurza · O‘zbekiston fizika jurnali · 2018-05-21
This paper shows inadequacy of contemporary conceptions of physics on nature of thermoelectric phenomena (Sebeck, Peltie and Thomson effects), based on linear nonequilibrium thermodynamics, to experimental data having…
- Carboxamides of the Alkaloid Dihydrothalsimine and Their Cytotoxicities
A. V. Koval′skaya, П. Р. Петрова, А. Н. Лобов, Л. Ф. Зайнуллина, В. А. Вахитов, Валентина И. Виноградова, Yu. V. Vakhitova, Ф. З. Галин, И. П. Цыпышева · Химия природных соединений · 2018-05-01
- Composition of the Essential Oil of Galium setaceum
Abdul Khaliq Jan, Ajmal Khan, Umar Farooq, Noor Rehman, Muhammad Tariq, Hasin Sahar · Химия природных соединений · 2018-05-01
- Improved Synthesis of Dbibb as a New Anti-Radiation Agent
Hongpeng Yang, Shouguo Zhang, Gang Wang, Xiaoxue Wen, Yunbo Sun, Shu‐Chen Liu, Tao Peng, Lin Wang · Химия природных соединений · 2018-05-01