Pub Date : 2021-02-23DOI: 10.29235/1561-8323-2021-65-1-46-51
A. Ivanets
A Fe, Mn-oxide catalyst was obtained by impregnation of thermally activated dolomite granules with aqueous solutions of Fe(III) and Mn(II) sulfates followed by heat treatment. Its physicochemical properties were studied using differential thermal analysis, X-ray diffraction, low-temperature adsorption-desorption of nitrogen, and scanning electron microscopy. The high efficiency of Fe(II) ion oxidation in aqueous media in a flow-type catalytic reactor was shown, which makes the obtained catalyst promising for the deironization of artesian waters.
{"title":"Preparation and physicochemical properties of the Fe, Mn-oxides catalyst","authors":"A. Ivanets","doi":"10.29235/1561-8323-2021-65-1-46-51","DOIUrl":"https://doi.org/10.29235/1561-8323-2021-65-1-46-51","url":null,"abstract":"A Fe, Mn-oxide catalyst was obtained by impregnation of thermally activated dolomite granules with aqueous solutions of Fe(III) and Mn(II) sulfates followed by heat treatment. Its physicochemical properties were studied using differential thermal analysis, X-ray diffraction, low-temperature adsorption-desorption of nitrogen, and scanning electron microscopy. The high efficiency of Fe(II) ion oxidation in aqueous media in a flow-type catalytic reactor was shown, which makes the obtained catalyst promising for the deironization of artesian waters.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"16 1","pages":"46-51"},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73397210","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}
Pub Date : 2021-02-23DOI: 10.29235/1561-8323-2021-65-1-40-45
A. Krivosheeva, V. Shaposhnikov, V. Borisenko
The possibilities and conditions for modifying the band gap and the behavior of interband transitions under compressive and tensile strains in the crystal lattice of a molybdenum disulfide monolayer have been determined by theoretical modeling. It is shown that depending on the value and direction of the strains the compound may be a direct-gap or indirect-gap semiconductor, and the conditions for such transformations are determined. The results demonstrate a potential use of the molybdenum disulfide monolayer in nanoelectronic devices of new generation in which controlled transport of charge carriers is possible
{"title":"Influence of lattice deformations on the electronic structure of the molybdenum disulfide monolayer","authors":"A. Krivosheeva, V. Shaposhnikov, V. Borisenko","doi":"10.29235/1561-8323-2021-65-1-40-45","DOIUrl":"https://doi.org/10.29235/1561-8323-2021-65-1-40-45","url":null,"abstract":"The possibilities and conditions for modifying the band gap and the behavior of interband transitions under compressive and tensile strains in the crystal lattice of a molybdenum disulfide monolayer have been determined by theoretical modeling. It is shown that depending on the value and direction of the strains the compound may be a direct-gap or indirect-gap semiconductor, and the conditions for such transformations are determined. The results demonstrate a potential use of the molybdenum disulfide monolayer in nanoelectronic devices of new generation in which controlled transport of charge carriers is possible","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"4 1","pages":"40-45"},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72692930","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}
Pub Date : 2021-02-22DOI: 10.29235/1561-8323-2021-65-1-7-10
V. Yanchevskiĭ
Reduced anisotropic unitary Whitehead groups of henselian division algebras, which are either unramified or tamely ramified with commutative residue algebra, are computed.
{"title":"On reduced anisotropic unitary Whitehead groups of henselian division algebras which are either unramified or tamely ramified with commutative residue algebras","authors":"V. Yanchevskiĭ","doi":"10.29235/1561-8323-2021-65-1-7-10","DOIUrl":"https://doi.org/10.29235/1561-8323-2021-65-1-7-10","url":null,"abstract":"Reduced anisotropic unitary Whitehead groups of henselian division algebras, which are either unramified or tamely ramified with commutative residue algebra, are computed.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"30 1","pages":"7-10"},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86066954","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}
Pub Date : 2020-11-05DOI: 10.29235/1561-8323-2020-64-5-624-631
V. Savchenko, S. Poddubko
From an interdisciplinary point of view, on the basis of a systematic approach, the concept of transferring control to a driver in highly automated vehicles was first formulated, which allows one to determine the potential possibility of regaining control of a highly automated car based on its awareness of the situational situation along the route of movement and monitoring of the current functional state, including readiness for emergency actions, and individual features of the driver. The classification of cross-modal information flows in highly automated and autonomous cars is presented. The definition of cross-modal interaction in highly automated vehicles is given, and the goal of analyzing heterogeneous information flows in on-board vehicle systems is formulated, where automatic analysis of heterogeneous information flows gives a synergistic effect. Examples of relevant driver information are provided.
{"title":"Concept of transferring control to a driver in highly automated cars","authors":"V. Savchenko, S. Poddubko","doi":"10.29235/1561-8323-2020-64-5-624-631","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-5-624-631","url":null,"abstract":"From an interdisciplinary point of view, on the basis of a systematic approach, the concept of transferring control to a driver in highly automated vehicles was first formulated, which allows one to determine the potential possibility of regaining control of a highly automated car based on its awareness of the situational situation along the route of movement and monitoring of the current functional state, including readiness for emergency actions, and individual features of the driver. The classification of cross-modal information flows in highly automated and autonomous cars is presented. The definition of cross-modal interaction in highly automated vehicles is given, and the goal of analyzing heterogeneous information flows in on-board vehicle systems is formulated, where automatic analysis of heterogeneous information flows gives a synergistic effect. Examples of relevant driver information are provided. ","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"50 1","pages":"624-631"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73542943","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}
Pub Date : 2020-11-05DOI: 10.29235/1561-8323-2020-64-5-551-557
S. V. Bucha, Yu. V. Lipai, P. Vorobiev, D. V. Cherednichenko, A. Vorobiov, N. Krutko
The effect of sodium dodecyl sulfate and sodium oleate on the structural-rheological properties of a dispersed hydrogel based on polyacrylic acid was studied. It was shown that the viscosity of hydrogel compositions with surfactants is higher than the viscosity of the individual components and increases with increasing temperature from 20 to 40 °C. Compositions with sodium oleate are non-Newton liquids and exhibit thixotropic properties.
{"title":"Structural-rheological properties of systems based on polymeric hydrogels and anionic surfactants","authors":"S. V. Bucha, Yu. V. Lipai, P. Vorobiev, D. V. Cherednichenko, A. Vorobiov, N. Krutko","doi":"10.29235/1561-8323-2020-64-5-551-557","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-5-551-557","url":null,"abstract":"The effect of sodium dodecyl sulfate and sodium oleate on the structural-rheological properties of a dispersed hydrogel based on polyacrylic acid was studied. It was shown that the viscosity of hydrogel compositions with surfactants is higher than the viscosity of the individual components and increases with increasing temperature from 20 to 40 °C. Compositions with sodium oleate are non-Newton liquids and exhibit thixotropic properties.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"27 1","pages":"551-557"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79441526","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}
Pub Date : 2020-11-05DOI: 10.29235/1561-8323-2020-64-5-558-566
Yaraslau U Dzichenka, M. Horetski, Y. Faletrov, A. Yantsevich, V. Shkumatov, S. Usanov
In silico analysis of “protein–ligand” complexes of human CYP7 enzymes with modified borondipyrrometene (BODIPY) and steroids, containing photo-activated crosslinking groups, wasperformed in order to identify structural peculiarities of their interaction. It was found that BODIPY molecules and DHEA derivative with diazirine group are able to bind tightly with human steroid-hydroxylases. Binding affinity is comparable with corresponding values for essential ligands of the enzymes. Binding mode of the modified steroid corresponds to the binding mode of essential CYP7 ligands, so formation of hydroxylated products is possible. It was found that presence of both diazirine and NBD groups in a molecule significantly increases affinity of the compound in case of CYP7A1 and, especially, CYP7B1. Amino acid residues, located in a close proximity with photo-activated groups were detected, that can form covalent adducts with them. The obtained results can shed light on the mechanism of interaction of the compounds with recombinant human CYP7 enzymes in vitro. The results can also be used for the identification of modified amino acids of the proteins that are formed under photoactivation of the compounds in vitro.
{"title":"In silico analysis of interaction of compounds, containing photoactivatable groups,with human CYP7 enzymes","authors":"Yaraslau U Dzichenka, M. Horetski, Y. Faletrov, A. Yantsevich, V. Shkumatov, S. Usanov","doi":"10.29235/1561-8323-2020-64-5-558-566","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-5-558-566","url":null,"abstract":"In silico analysis of “protein–ligand” complexes of human CYP7 enzymes with modified borondipyrrometene (BODIPY) and steroids, containing photo-activated crosslinking groups, wasperformed in order to identify structural peculiarities of their interaction. It was found that BODIPY molecules and DHEA derivative with diazirine group are able to bind tightly with human steroid-hydroxylases. Binding affinity is comparable with corresponding values for essential ligands of the enzymes. Binding mode of the modified steroid corresponds to the binding mode of essential CYP7 ligands, so formation of hydroxylated products is possible. It was found that presence of both diazirine and NBD groups in a molecule significantly increases affinity of the compound in case of CYP7A1 and, especially, CYP7B1. Amino acid residues, located in a close proximity with photo-activated groups were detected, that can form covalent adducts with them. The obtained results can shed light on the mechanism of interaction of the compounds with recombinant human CYP7 enzymes in vitro. The results can also be used for the identification of modified amino acids of the proteins that are formed under photoactivation of the compounds in vitro.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"30 1","pages":"558-566"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80025723","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}
Pub Date : 2020-11-05DOI: 10.29235/1561-8323-2020-64-5-544-550
T. F. Kouznetsova, V. Agabekov, A. Ivanets, E. V. Karpinchik, J. Sauka
Silica with ordered nanostructured morphology characteristic of mesoporous molecular sieves with cubic packing of cylindrical pores and a three-dimensional porous structure is obtained from natural quartz sand. It was shown by X-ray diffraction, scanning electron microscopy, and low-temperature nitrogen adsorption-desorption that the obtained silica material is thermally stable, amorphous, consists of submicron grains, has a high specific surface area of 1396 m2/g, a pore volume of 0.780 cm3/g and an average diameter of 2.2 nm with a narrow size distribution of mesopores.
{"title":"Synthesis of mesoporous silica with ordered nanostructural morphology from natural quartz sand","authors":"T. F. Kouznetsova, V. Agabekov, A. Ivanets, E. V. Karpinchik, J. Sauka","doi":"10.29235/1561-8323-2020-64-5-544-550","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-5-544-550","url":null,"abstract":"Silica with ordered nanostructured morphology characteristic of mesoporous molecular sieves with cubic packing of cylindrical pores and a three-dimensional porous structure is obtained from natural quartz sand. It was shown by X-ray diffraction, scanning electron microscopy, and low-temperature nitrogen adsorption-desorption that the obtained silica material is thermally stable, amorphous, consists of submicron grains, has a high specific surface area of 1396 m2/g, a pore volume of 0.780 cm3/g and an average diameter of 2.2 nm with a narrow size distribution of mesopores.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"23 1","pages":"544-550"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81440885","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}
Pub Date : 2020-11-05DOI: 10.29235/1561-8323-2020-64-5-519-525
Dz. A. Kastsiukevich, N. Dmitruk
This paper deals with an optimal control problem for a linear discrete system subject to unknown bounded disturbances with the control goal being to steer the system with guarantees to a given target set while minimizing a given cost function. We define an optimal control strategy with one correction time instant, meaning taking into account information about one future state of the object, and propose an efficient numerical method for constructing it.
{"title":"A closed-loop strategy in an optimal guaranteed control problem for a linear system","authors":"Dz. A. Kastsiukevich, N. Dmitruk","doi":"10.29235/1561-8323-2020-64-5-519-525","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-5-519-525","url":null,"abstract":"This paper deals with an optimal control problem for a linear discrete system subject to unknown bounded disturbances with the control goal being to steer the system with guarantees to a given target set while minimizing a given cost function. We define an optimal control strategy with one correction time instant, meaning taking into account information about one future state of the object, and propose an efficient numerical method for constructing it.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"113 1","pages":"519-525"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87065369","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}
Pub Date : 2020-11-05DOI: 10.29235/1561-8323-2020-64-5-632-640
A. Dziarnovich
Traditional notions on the Belarusian-Lithuanian borderlands and the earlier Lithuania of the 10-13th c. are quite sketchy. In the public consciousness of a population of the historical Lithuania (“Lithuania in the narrow sense”) is significantly inferior in terms of its civilization development of neighboring Rus' and Poland. But already in the 13th century new impulses of state formation began from Lithuania at a time when the entire of the East Slavic region of Europe was in a deep crisis. The article analyzes the results of the latest archaeological and historical research of the four centers of the Belarusian-Lithuanian borderlands and the historical Lithuania in the 10-13th c.: Kreva, Halsany, Kemaй (Kernave), Vilnia (Vilnius). The significant presence of Slavic settlers influenced the existence of urban settlements with a clear administrative and sacred function among the Baltic pagan population of Lithuania in the 12th-14th centuries. On the example of Kreva and Kernave we can see the emergence of regional centers of Lithuania, the first of which is already in the 14th century it will be the domain of Alhierd (Olgierd) and Jagiello, and the second in the late 13th - early 14th centuries it will be the main residence of the Duke Trojdzien and perhaps of Vicien. Halsany become generic possession of the Halsanski princes and early modern town as and Kreva will develop in accordance with the process of urbanization (16-18th cc.). Kreva, Kernave and Vilnius can be described as the sacred center of the Balts. These observations allow us to consider the emergence of a new state, the Grand Duchy of Lithuania, as a result of the influence of the Slavic ethnos on the corresponding development of political and economic interests of Lithuanian elites, as well as ethno-cultural interaction.
{"title":"The Belarusian-Lithuanian borderlands of the 10–13th centuries: from Krevа to Kernavė","authors":"A. Dziarnovich","doi":"10.29235/1561-8323-2020-64-5-632-640","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-5-632-640","url":null,"abstract":"Traditional notions on the Belarusian-Lithuanian borderlands and the earlier Lithuania of the 10-13th c. are quite sketchy. In the public consciousness of a population of the historical Lithuania (“Lithuania in the narrow sense”) is significantly inferior in terms of its civilization development of neighboring Rus' and Poland. But already in the 13th century new impulses of state formation began from Lithuania at a time when the entire of the East Slavic region of Europe was in a deep crisis. The article analyzes the results of the latest archaeological and historical research of the four centers of the Belarusian-Lithuanian borderlands and the historical Lithuania in the 10-13th c.: Kreva, Halsany, Kemaй (Kernave), Vilnia (Vilnius). The significant presence of Slavic settlers influenced the existence of urban settlements with a clear administrative and sacred function among the Baltic pagan population of Lithuania in the 12th-14th centuries. On the example of Kreva and Kernave we can see the emergence of regional centers of Lithuania, the first of which is already in the 14th century it will be the domain of Alhierd (Olgierd) and Jagiello, and the second in the late 13th - early 14th centuries it will be the main residence of the Duke Trojdzien and perhaps of Vicien. Halsany become generic possession of the Halsanski princes and early modern town as and Kreva will develop in accordance with the process of urbanization (16-18th cc.). Kreva, Kernave and Vilnius can be described as the sacred center of the Balts. These observations allow us to consider the emergence of a new state, the Grand Duchy of Lithuania, as a result of the influence of the Slavic ethnos on the corresponding development of political and economic interests of Lithuanian elites, as well as ethno-cultural interaction.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"33 1","pages":"632-640"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86811743","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}
Pub Date : 2020-11-05DOI: 10.29235/1561-8323-2020-64-5-567-573
Ya. S. Kamelchuk, O. Baranov, P. S. Kiryanov, V. Padutov
A metagenomic analysis of the endophytic microflora of Vaccinium corymbosum L. and Vaccinium myrtillus L. root systems was carried out. Two dominant species of micromycetes forming ericoid mycorrhiza were identified – Phialocephala fortinii C. J. K. Wang & H. E. Wilcox and Pezicula sp. Tul. & C. Tul. Pure cultures of mycorrhizal fungi were prepared, a comprehensive morphological and genetic assay of the strains was carried out. Based on the results of genetic-taxonomic analysis, the assumption of the polyphyletic origin of species belonging to Phialocephala and Pezicula is confirmed.
采用宏基因组学方法对金穗和桃金娘根系的内生菌群进行了分析。鉴定了形成镰刀状菌根的两个优势种:phalocephala fortini C. J. K. Wang & H. E. Wilcox和Pezicula sp. Tul。& C.图。制备了菌根真菌纯培养物，对菌株进行了全面的形态和遗传分析。根据遗传分类分析的结果，证实了该属植物的多系起源假设。
{"title":"Morphological-cultural and molecular genetic features of collection strains of mycoris mushrooms Phialocephala fortinii and Pezicula sp.","authors":"Ya. S. Kamelchuk, O. Baranov, P. S. Kiryanov, V. Padutov","doi":"10.29235/1561-8323-2020-64-5-567-573","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-5-567-573","url":null,"abstract":"A metagenomic analysis of the endophytic microflora of Vaccinium corymbosum L. and Vaccinium myrtillus L. root systems was carried out. Two dominant species of micromycetes forming ericoid mycorrhiza were identified – Phialocephala fortinii C. J. K. Wang & H. E. Wilcox and Pezicula sp. Tul. & C. Tul. Pure cultures of mycorrhizal fungi were prepared, a comprehensive morphological and genetic assay of the strains was carried out. Based on the results of genetic-taxonomic analysis, the assumption of the polyphyletic origin of species belonging to Phialocephala and Pezicula is confirmed.","PeriodicalId":11227,"journal":{"name":"Doklady Akademii nauk","volume":"26 1","pages":"567-573"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81528414","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}
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