发布求助
文献互助 智能选刊 最新文献

Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences最新文献

筛选
英文 中文
Differentiation of membrane active crown ethers on the multilamellar layers 膜活性冠醚在多层上的分化
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-09-15 DOI: 10.56017/2181-1318.1114
U. Mirkhodjaev, O. Yarishkin, U. Sharafutdinova, U. Toyirov, N. Atamuratova, Anisa Tashmukhamedova, Bekdjan Tashmukhamedov
{"title":"Differentiation of membrane active crown ethers on the multilamellar layers","authors":"U. Mirkhodjaev, O. Yarishkin, U. Sharafutdinova, U. Toyirov, N. Atamuratova, Anisa Tashmukhamedova, Bekdjan Tashmukhamedov","doi":"10.56017/2181-1318.1114","DOIUrl":"https://doi.org/10.56017/2181-1318.1114","url":null,"abstract":"Investigation of the interaction of crown ethers, which are have different structure and mechanism of membrane action, with multilamellar dispersions makes it possible to establish a difference in their effect on the rearrangement of the initial structure of lipid bilayers. Investigation of the restructuring of lipid bilayers during interaction of complexons, ionophores and channel-formers with a membrane allows obtaining important information on the mechanisms of transmembrane ion transport.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131454226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analytic approach to ground state energy of charged anyon gas in strong magnetic field 强磁场中带电任意子气体基态能量的解析方法
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-09-15 DOI: 10.56017/2181-1318.1121
B. Abdullaev, U. Rößler, C. Park, M. Musakhanov
{"title":"Analytic approach to ground state energy of charged anyon gas in strong magnetic field","authors":"B. Abdullaev, U. Rößler, C. Park, M. Musakhanov","doi":"10.56017/2181-1318.1121","DOIUrl":"https://doi.org/10.56017/2181-1318.1121","url":null,"abstract":"We present analytic formulas for the ground state energy of two-dimensional (2D) anyon gas in strong magnetic field (Landau level filling factor νL ≤ 1). The formulas are obtained by applying harmonic potential regularization for the vanishing confinement to harmonically confined Coulomb anyon gas. In a case of absence of the Coulomb interaction our analytic result provides an exact solution. It contains a contribution of the anyon gauge field characterized by the anyon parameters ν and νL. In a case of presence of the Coulomb interaction we introduce a function depending on the parameters ν, νL and the density parameter rs. The function is determined by fitting the Fano-Ortolani interpolation equation in the fractional quantum Hall effect regime for spinpolarized electrons and by consistence requirement with known results for the ground state energy of the 2D Coulomb Bose gas in strong magnetic field. We show that our formulas are valid not only for fermions (ν = 1) but quite generally for anyons (0 ≤ ν ≤ 1).","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127207922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physico-chemical and adsorption properties of activated adsorbents obtained on the basis of wood stems 以木茎为原料制备的活性吸附剂的理化性能和吸附性能
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-09-15 DOI: 10.56017/2181-1318.1111
Rakhimjon Paygamov, I. Eshmetov, S. Kuldasheva, H. Akbarov, Feruza Jurayeva
{"title":"Physico-chemical and adsorption properties of activated adsorbents obtained on the basis of wood stems","authors":"Rakhimjon Paygamov, I. Eshmetov, S. Kuldasheva, H. Akbarov, Feruza Jurayeva","doi":"10.56017/2181-1318.1111","DOIUrl":"https://doi.org/10.56017/2181-1318.1111","url":null,"abstract":"As a result of the investigations, the adsorbents of activated coal at different temperatures and with water vapor were extracted from plane-tree, ashtree, Cherry, Apricot, nut stems were received and their physico-chemical and adsorption properties were determined. The results have shown that the adsorption efficiency and adsorption properties of the plane-tree adsorbents are significantly higher than those of other trees. It can be seen that heating the resulting coal adsorbents from 400 to 800◦C, that is, thermal activation, almost has double their pore volume. The adsorption properties of adsorbents were determined in the following orders, for thermally activated coals at a temperature 400◦C: PTAC > AshTAC > ATAC > ChTAC > NTAC, for thermally activated coals at a temperature 600◦C: PTAC > AshTAC > ChTAC > NTAC > ATAC, for thermally activated coals at a temperature 800◦C: PTAC > AshTAC > ChTAC > ATAC > NTAC, for activated coals that have been activated with water vapor at 800◦C: PTAC > AshTAC > ATAC > NTAC > ChTAC.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113966040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distribution of root-knot nematodes on agricultural plants, harm and their host plants 根结线虫在农业植物上的分布、危害及其寄主植物
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-09-15 DOI: 10.56017/2181-1318.1116
S. Saidova, Holisa Eshova, Guzal Mirzaliyeva, Sayora Sadikova
{"title":"Distribution of root-knot nematodes on agricultural plants, harm and their host plants","authors":"S. Saidova, Holisa Eshova, Guzal Mirzaliyeva, Sayora Sadikova","doi":"10.56017/2181-1318.1116","DOIUrl":"https://doi.org/10.56017/2181-1318.1116","url":null,"abstract":"The article presents data on the spread of root-knot nematodes on crops, harm and host plants in the conditions of the Tashkent oasis. It has been established that 5 species of root nematodes are found in cultivated and wild plants Meloidogyne javanica, M. arenaria, M. incognita, M. acrita, M. plum, which are common in vegetables and melons and cause great damage to these plants. Nematode M.javanica was found in the roots of plants such as sunflower, cabbage, watermelon, cucumber, pumpkin, zucchini, melon, corn, tomato, beets, eggplant and carrots, in the foci of infection of the plant 20-60 %, the level of damage to the root system is 4-5 points; damage to plants such as cucumber, pumpkin, tomato and potato by the nematode M. arenaria is 20-60 %, damage to the root system is 4-5 points, damage to sunflower, radish and dill is 2035 %, damage to the root system is 1.0-2.8 points, the damage to plants such as clover and onions was 15-20 %. Damage to plants such as beets, cabbage, pumpkin, melon, beans, onions, hot peppers, tomatoes, potatoes and celery by the M. incognita nematode was 30-45 %, the damage to the root system was 3-5 points; damage to plants such as tomato, cucumber, watermelon, melon and beans was 50-80 %, damage to the root system was 3-4 points, and plants such as corn, clover and wheat were not damaged by nematodes. Damage to plants such as sunflower, radish, and tomato nematode M. hapla was 3-4 points, damage to the roots of clover and peanuts was 1 point. Nematodes of the genus Meloidogyne were found in 82 species of cultivated and wild plants belonging to 24 families, including 31 species of agricultural plants, 51 species of wild plants, of which 31 species are host plants of root nematodes, discovered for the first time in Uzbekistan. Due to the high prevalence and great damage to nematodes of the genus Meloidogyne in agricultural crops, preventive and agrotechnical measures have been developed and recommended to combat these dangerous parasites.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129910583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-aggregation of C60 particles in a volume of evaporating droplets on a flat surface C60粒子在平面上蒸发液滴的体积中自聚集
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-09-15 DOI: 10.56017/2181-1318.1112
U. Makhmanov, A. Kokhkharov, S. Bakhramov, D. Erts
{"title":"Self-aggregation of C60 particles in a volume of evaporating droplets on a flat surface","authors":"U. Makhmanov, A. Kokhkharov, S. Bakhramov, D. Erts","doi":"10.56017/2181-1318.1112","DOIUrl":"https://doi.org/10.56017/2181-1318.1112","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126829222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
To the education of operational thinking in the higher mathematics courses of the higher technical school 论高职高专高等数学课程中运算思维的教育
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-09-15 DOI: 10.56017/2181-1318.1110
V. Zharov, A. Mardanov
{"title":"To the education of operational thinking in the higher mathematics courses of the higher technical school","authors":"V. Zharov, A. Mardanov","doi":"10.56017/2181-1318.1110","DOIUrl":"https://doi.org/10.56017/2181-1318.1110","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131251755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intermolecular dynamics of condensed state: study of temperature effect on anisotropy relaxation by vibration spectroscopy 凝聚态分子间动力学:用振动光谱研究温度对各向异性弛豫的影响
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-09-15 DOI: 10.56017/2181-1318.1119
B. Eshchanov, S. Otajonov, Jurat Gayipov, D. Xudoyberdiyeva, Sarvarbek Qurbanbayev
{"title":"Intermolecular dynamics of condensed state: study of temperature effect on anisotropy relaxation by vibration spectroscopy","authors":"B. Eshchanov, S. Otajonov, Jurat Gayipov, D. Xudoyberdiyeva, Sarvarbek Qurbanbayev","doi":"10.56017/2181-1318.1119","DOIUrl":"https://doi.org/10.56017/2181-1318.1119","url":null,"abstract":"As a result of the experimental study of the spectra of anisotropic scattering of light, a character of orientation movement of molecules in aromatic hydrocarbons has been analyzed. The obtained results have been interpreted from the viewpoint of a model of inhibited rotation and the contributions of the rotational and vibrational degrees of freedom to a molecule spectrum have been estimated. With increasing temperature of liquids under study and approaching a critical state, the rotational degrees of freedom \"freeze\", and the vibrational degrees have become more significant.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130520156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
On the new nonlinear properties of the nonlinear heat conductivity problem in nondivergence form 非发散形式的非线性导热问题的新的非线性性质
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-06-15 DOI: 10.56017/2181-1318.1095
M. Aripov, Maftuha Sayfullayeva
{"title":"On the new nonlinear properties of the nonlinear heat conductivity problem in nondivergence form","authors":"M. Aripov, Maftuha Sayfullayeva","doi":"10.56017/2181-1318.1095","DOIUrl":"https://doi.org/10.56017/2181-1318.1095","url":null,"abstract":"In this article, we discuss one problem of nonlinear thermal conductivity with double nonlinearity; an exact analytical solution has been found for it, the analysis of which allows revealing a number of characteristic features of thermal processes in nonlinear media. The following nonlinear effects have been established: the inertial effect,the finite propagation velocity of thermal disturbances, the spatial localization of heat, and the effect of the finite time of the existence of a thermal structure in an absorption medium.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124908035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generalized metric spaces and hyperspaces 广义度量空间和超空间
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-06-15 DOI: 10.56017/2181-1318.1103
R. Beshimov, D. Safarova
{"title":"Generalized metric spaces and hyperspaces","authors":"R. Beshimov, D. Safarova","doi":"10.56017/2181-1318.1103","DOIUrl":"https://doi.org/10.56017/2181-1318.1103","url":null,"abstract":"In this paper, we investigate the heredity of some kind of generalized metric spaces to expcX and expnX. We will study the connection between a σ-space, Σ-space, a stratifiable space, א-space, א0-space and its hyperspace.","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126047341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The entrance times for circle maps with a break 有休息的圆形地图的入口时间
Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences Pub Date : 2020-06-15 DOI: 10.56017/2181-1318.1097
A. Dzhalilov, J. Karimov
{"title":"The entrance times for circle maps with a break","authors":"A. Dzhalilov, J. Karimov","doi":"10.56017/2181-1318.1097","DOIUrl":"https://doi.org/10.56017/2181-1318.1097","url":null,"abstract":"","PeriodicalId":127023,"journal":{"name":"Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132459187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信