Proceedings of the National Academy of Sciences of Belarus, Chemical Series最新文献_第10页

Heat-insulating porous material based on glauconite-containing sands and aleurites of the Novodvorskoye deposit of the Republic of Belarus 基于白罗斯共和国Novodvorskoye矿床中含海绿石的砂和无沸石的隔热多孔材料

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-12-03 DOI: 10.29235/1561-8331-2021-57-4-463-471

S. E. Barantseva, A. Pazniak, Y. A. Klimosh, I. M. Azaranka, N. N. Hundzilovich, A. Pospelov

{"title":"Heat-insulating porous material based on glauconite-containing sands and aleurites of the Novodvorskoye deposit of the Republic of Belarus","authors":"S. E. Barantseva, A. Pazniak, Y. A. Klimosh, I. M. Azaranka, N. N. Hundzilovich, A. Pospelov","doi":"10.29235/1561-8331-2021-57-4-463-471","DOIUrl":"https://doi.org/10.29235/1561-8331-2021-57-4-463-471","url":null,"abstract":"The results on the research of heat-insulating porous ceramic materials produced using overburden rocks of the Novodvorsk deposit of Pinsk district of the Brest region as the main component of raw materials are presented in the study and the use of bulk rock consisting of glauconite sands and aleurites is recommended. Low-melting clay, basalt and a blowing agent are used as additional components, rational combination of which would ensure the forming ability of ceramic masses and the required set of the physicochemical properties of the material. The dependence of the bulk density, swelling coefficient, coefficient of thermal conductivity on the chemical and mineral composition of the used and raw materials is established, wich is the criteria for choosing composition with the maximum use of overburden and the necessary plasticity of the ceramic mass required for the molding process of raw granules. The obtained results can serve as a basis for the large-scale use of not only the minerals of the Novodvorsk deposit (basalts and tuffs), but also associated – glauconite-containing overburden. This will make a significant contribution to the expanding the mineral resource base of the Republic of Belarus.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90959218","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

Nanocomposites based on apatitic tricalcium phosphate and autofibrin 基于磷灰质磷酸三钙和自体纤维蛋白的纳米复合材料

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-12-03 DOI: 10.29235/1561-8331-2021-57-4-413-423

I. E. Glazov, V. Krut’ko, R. A. Vlasov, O. Musskaya, A. Kulak

{"title":"Nanocomposites based on apatitic tricalcium phosphate and autofibrin","authors":"I. E. Glazov, V. Krut’ko, R. A. Vlasov, O. Musskaya, A. Kulak","doi":"10.29235/1561-8331-2021-57-4-413-423","DOIUrl":"https://doi.org/10.29235/1561-8331-2021-57-4-413-423","url":null,"abstract":"Nanocomposites based on apatitic tricalcium phosphate in an autofibrin matrix were obtained by precipitation at a Ca/P ratio of 1.50, pH 9 and a maturation time from 30 min to 7–14 days. The resorbability of nanocomposites was determined by the composition of calcium phosphates, which, during long-term maturation, formed as the calcium-deficient hydroxyapatite with a Ca/P ratio of 1.66, whereas biopolymer matrix favored the formation of more soluble calcium phosphates with a Ca/P ratio of 1.53–1.59. It was found that the fibrin clot stabilized, along with apatitic tricalcium phosphate, the phase of amorphous calcium phosphate, which after 800 °C was transformed into resorbable α-tricalcium phosphate. Citrated plasma inhibited the conversion of apatitic tricalcium phosphate into stoichiometric hydroxyapatite, which also facilitated the formation of resorbable β-tricalcium phosphate after 800 °C. The combined effect of the maturation time and the biopolymer matrix determined the composition, physicochemical and morphological properties of nanocomposites and the possibililty to control its extent of resorption","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":"299 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79674621","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

Quantum-chemical modeling of cortisone-fullerenol agents of cancer therapy 可的松-富勒烯醇抗癌药物的量子化学模型

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-12-03 DOI: 10.29235/1561-8331-2021-57-4-400-407

E. Dikusar, A. Pushkarchuk, T. V. Bezyazychnaya, E. A. Akishina, A. Soldatov, S. Kuten, S. Stepin, A. Nizovtsev, S. Kilin, V. Potkin

{"title":"Quantum-chemical modeling of cortisone-fullerenol agents of cancer therapy","authors":"E. Dikusar, A. Pushkarchuk, T. V. Bezyazychnaya, E. A. Akishina, A. Soldatov, S. Kuten, S. Stepin, A. Nizovtsev, S. Kilin, V. Potkin","doi":"10.29235/1561-8331-2021-57-4-400-407","DOIUrl":"https://doi.org/10.29235/1561-8331-2021-57-4-400-407","url":null,"abstract":"In order to therapeutically destroy oncological neoplasms, chemotherapy or radiotherapy is usually applied, and in isotope medicine – short-lived radio nuclides are injected into the tumor (59Fe, 90Y, 95Zr, 99mTc, 106Ru, 114*In, 147Eu, 148Eu, 155Eu, 170Tm, 188Re, 210Po, 222Rn, 230U, 237Pu, 240Cm, 241Cm, 253Es). Binary (or neutron capture) therapy is a technology developed for the selective effect on malignant tumors using drugs that are tropic to tumors and contain non-radioactive nuclides (10B, 113Cd, 157Gd at al.). Triadic therapy involves the sequential introduction into the body of a combination of two or more separately inactive and harmless components, which are tropic to tumor tissues and capable of selectively accumulating in them or chemically interacting with each other and destroying tumor neoplasms under the action of certain sensitizing external influences. The aim of this work is quantum-chemical simulation of the electronic structure and analysis of the thermodynamic stability of new cortisone-fullerenol agents for the treatment of tumor neoplasms. The need for preliminary studies of modeling such objects is due to the very high labor intensity, cost and complexity of their practical production.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82948792","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: 2

On water solubility of С17–С24 alkylbenzolsulphoic acids used as an additive to motor oils С17 -С24烷基苯并磺酸作为机油添加剂的水溶性研究

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-12-03 DOI: 10.29235/1561-8331-2021-57-4-408-412

E. V. Karpinchik, L. I. Yuzhik, V. E. AgabekovInstitute

引用次数: 0

Development of a multiplex system for determining 11 genetic markers of predisposition to obesity 一个多重系统的发展，以确定肥胖倾向的11个遗传标记

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-09-05 DOI: 10.29235/1561-8331-2021-57-3-300-309

G. Sergeev, I. Haidukevich, A. Gorkavaya, M. Ameliyanovich, I. Mosse, S. Usanov

引用次数: 0

Decomposition of polyhalite with hydrochloric acid 用盐酸分解聚盐石

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-09-05 DOI: 10.29235/1561-8331-2021-57-3-340-345

V. V. Shevchuk, T. N. Potkina, O. Smetanina

{"title":"Decomposition of polyhalite with hydrochloric acid","authors":"V. V. Shevchuk, T. N. Potkina, O. Smetanina","doi":"10.29235/1561-8331-2021-57-3-340-345","DOIUrl":"https://doi.org/10.29235/1561-8331-2021-57-3-340-345","url":null,"abstract":"Due to the fact that polyhalite ores are poorly soluble in water, it was of interest to study the method of their processing using acids. The influence of polyhalite size, the hydrochloric acid concentration and consumption, the ratio of L: S, the temperature and time of mixing the pulp on the useful components extraction into the solution have been studied. The optimal conditions for the decomposition of polyhalite with hydrochloric acid have been determined. The degree of useful components extraction into the solution depends on the concentration of hydrochloric acid or on the L:S ratio of the pulp, but in all cases the decomposition of polyhalite occurs without secondary crystal formation, as evidenced by the same degree of potassium and magnesium ions extraction. The degree of potassium and magnesium ions extraction from polyhalite into solution increases with decomposition process temperature, an increase in the consumption of acid and the duration of the reagents interaction, and decreases with increasing acid concentration. The CaSO4 content in the solution increases sharply with an increase in the HCl concentration and is practically independent of the process temperature. Hydrochloric acid extract can be used for phosphate raw decomposition in order to obtain complex fertilizers.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81922563","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

Sorption of peptides and amino acids by ion exchangers 离子交换剂对肽和氨基酸的吸附

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-09-05 DOI: 10.29235/1561-8331-2021-57-3-278-285

Z. Kuvaeva, E. G. Karankevich

引用次数: 1

Acid-basic properties of chromium(III) oxide surface 氧化铬(III)表面的酸碱性质

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-09-05 DOI: 10.29235/1561-8331-2021-57-3-270-277

E. A. Shaporova, A. Zhukova, A. K. Baev, Alexey Sidorenko

引用次数: 0

Titration of chelating fibrous sorbent in the presence of complex-forming divalent cations 在形成络合物的二价阳离子存在下，螯合纤维吸附剂的滴定

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-09-05 DOI: 10.29235/1561-8331-2021-57-2-263-269

V. Soldatov, T. A. Korshunova, E. Kosandrovich, P. V. Nesteronok

{"title":"Titration of chelating fibrous sorbent in the presence of complex-forming divalent cations","authors":"V. Soldatov, T. A. Korshunova, E. Kosandrovich, P. V. Nesteronok","doi":"10.29235/1561-8331-2021-57-2-263-269","DOIUrl":"https://doi.org/10.29235/1561-8331-2021-57-2-263-269","url":null,"abstract":"Titration curves of H-forms of the fibrous chelating sorbent with iminodiacetic groups based on industrial polyacrylonitrile fiber Nitron with potassium hydroxide in 1M KCl solution in the presence of Ni2+, Co2+, Cu2+ and Ca2+ chlorides were obtained. The method used made it possible to simultaneously measure the pH of the solution and the concentration of the divalent cation at each point of the titration curve. From these data, the dependences of their sorption values on the pH of the equilibrium solution were calculated. The curves of direct and back titration practically coincided in all cases. As the pH changed during titration, precipitation was observed at pH values of precipitation of the corresponding hydroxides. In this case, the increase in pH was suspended or greatly slowed down by adding alkali to the titration cell. The formation of a precipitate occurred mainly in a solution for Co2+ and Ni2+ (pH 8), when the ion exchanger was saturated with a metal ion. In the case of Cu2+ (precipitate formation pH 4), Cu2+ sorption occurs at both lower and higher pH due to ionization of carboxyl groups and partial dissolution of the precipitate. In all cases, the maximum sorption of Ni2+, Co2+, Cu2+, Ca2+ corresponded to the formation of sorption complexes of the R–N(CH2COO-)2Me2+ type.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":"56 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86526163","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

Ecogeochemical studies of the postindustrial sites of Minsk 明斯克后工业地区的生态地球化学研究

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2021-09-05 DOI: 10.29235/1561-8331-2021-57-3-320-330

T. Kukharchyk, S. Kakareka, M. Kazyrenka, V. D. Chernyuk, A. V. Krylovich

{"title":"Ecogeochemical studies of the postindustrial sites of Minsk","authors":"T. Kukharchyk, S. Kakareka, M. Kazyrenka, V. D. Chernyuk, A. V. Krylovich","doi":"10.29235/1561-8331-2021-57-3-320-330","DOIUrl":"https://doi.org/10.29235/1561-8331-2021-57-3-320-330","url":null,"abstract":"In the article the results of studying the sites of industrial enterprises, which have stopped their activities fully or partially in Minsk, are discussed. It is shown that in most cases the re-development of industrial sites with a change of their functional purpose is carried out after 10 years or more. Based on the results of preliminary investigation of a number of the former industrial sites, it was established that such sites continue to be sources of pollutants after the completion of enterprises activity. The enrichment of technogenic substrates carried out from industrial sites by surface runoff (sediments near storm collectors and in topographic lows) with heavy metals is shown. The average content of cadmium in sediments is 2,6 (maximum – 3,9), lead – 3,1 (14), copper – 2,5 (2,2), zinc – 1,7 (2,8), nickel – 3,3 (8,0), chromium – 3,4 (6,6) times higher than in soils. The established standards for lead were exceeded in 63 % of cases, for cadmium – in 77 %, for zinc and copper – in 100 % of cases. The maximum permissible concentration was exceeded 5 times for at least one indicator in almost half of the samples (44 %). The dependence of heavy metals accumulation on the specialization of previously carried out industrial activities is shown. The need for improvement of scientific and methodological approaches to studying of contaminated and potentially contaminated post-industrial areas in connection with their planned re-profiling for urban planning purposes is discussed.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":"1957 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91219810","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