Proceedings of the National Academy of Sciences of Belarus, Chemical Series最新文献_第5页

Development and validation of the method for quantitative determination of preservatives in sodium oxybutyrate syrup 丁酸氧钠糖浆中防腐剂含量测定方法的建立与验证

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-05 DOI: 10.29235/1561-8331-2023-59-1-26-34

Z. Kuvaeva, S. P. Kacherskaya, O. S. Mastitskaya, E. A. Khvalova

引用次数: 0

The release of antimony into the atmospheric air on the territory of Belarus: sources, levels and long-term dynamics 向白俄罗斯境内大气中释放的锑:来源、水平和长期动态

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-29 DOI: 10.29235/1561-8331-2022-58-4-423-432

S. Kakareka, T. Kukharchyk

{"title":"The release of antimony into the atmospheric air on the territory of Belarus: sources, levels and long-term dynamics","authors":"S. Kakareka, T. Kukharchyk","doi":"10.29235/1561-8331-2022-58-4-423-432","DOIUrl":"https://doi.org/10.29235/1561-8331-2022-58-4-423-432","url":null,"abstract":"The results of the first assessment of the antimony release into the atmospheric air on the territory of Belarus are discussed. The main anthropogenic sources of antimony emission have been identified, the emission factors have been developed, and the volumes of antimony emission for the period from 1990 to 2020 have been calculated. It is shown that total antimony emissions varied in the range from 1.6 to 5.6 tons per year with maximum values in the early 1990 s, and minimal – in 2000. Antimony emission in 2020 on the territory of the country is estimated at 2.4 t, the contribution of Belarus to global emission is 0.1 %. Decreasing trend of antimony emission over a 30-year period and a change in the contribution of the main sources to total emission have been established. A significant decrease in the contribution of stationary combustion of fuel (from 66 to 14 %) is due to a change in the fuel balance and is accompanied by increase of the contribution of brake wear (from 34 to 61 %). The data obtained can be used to model the transport and dispersion of antimony, to assess health and ecosystems risks, and to develope measures to reduce the releases of antimony into the environment.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89535877","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 doxorubicino-fullerenol agents of cancer therapy 阿霉素-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 : 2022-11-29 DOI: 10.29235/1561-8331-2022-58-4-369-378

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

{"title":"Quantum-chemical modeling of doxorubicino-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. Kulchitsky, V. Potkin","doi":"10.29235/1561-8331-2022-58-4-369-378","DOIUrl":"https://doi.org/10.29235/1561-8331-2022-58-4-369-378","url":null,"abstract":"In order to therapeutically destroy neoplasms, chemotherapy or radiotherapy is usually applied, and in isotope medicine short-lived radionuclides are injected into the tumor (59Fe, 90Y, 95Zr, 99mTc, 106Ru, 114*In, 147Eu, 148Eu, 155Eu, 170Tm, 177mLu, 188Re, 210Po, 222Rn, 230U, 237Pu, 240Cm, 241Cm, 253Es). Binary (or neutron capture) therapy is a technology designed to selectively treat malignant tumors and using drugs tropic to tumors containing non-radioactive nuclides (10B, 113Cd, 157Gd at al.). Triadic therapy is the sequential introduction into the body of a combination of two or more separately inactive and harmless components, tropic to tumor tissues and capable of selectively accumulating in them or entering into chemical interaction with each other and destroying tumor neoplasms under certain sensitizing external influences. The aim of this work is to quantum-chemically simulate the electronic structure and to analyze the thermodynamic stability of new doxorubicino-fullerenol agents for the treatment of tumor neoplasms. The need for preliminary studies on the modeling of such objects is due to the extremely 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":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85537583","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

Aluminium and mica azide surface functionalization 铝和云母叠氮化物表面功能化

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-29 DOI: 10.29235/1561-8331-2022-58-4-379-386

B. Ranishenka, I. Chelnokova, A. Poznyak

引用次数: 0

Development and validation of the method for determination of amitraz in honey using high-performance liquid chromatography with mass spectrometric detection 高效液相色谱-质谱联用测定蜂蜜中阿米特拉兹的方法的建立与验证

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-29 DOI: 10.29235/1561-8331-2022-58-4-387-397

A. G. Polonevich, S. Leschev, V. A. Bulhakava, L. L. Belyshava

{"title":"Development and validation of the method for determination of amitraz in honey using high-performance liquid chromatography with mass spectrometric detection","authors":"A. G. Polonevich, S. Leschev, V. A. Bulhakava, L. L. Belyshava","doi":"10.29235/1561-8331-2022-58-4-387-397","DOIUrl":"https://doi.org/10.29235/1561-8331-2022-58-4-387-397","url":null,"abstract":"Method for determination of the insecticide amitraz residual content in honey has been developed and validated. The method is selective, express and easy-to-perform. The technique is based on the extraction of amitraz from alkalized aqueous solutions of honey with n-hexane and quantitative determination by high-performance liquid chromatography with mass spectrometric detection. Validation was performed using three types of honey at three levels of amitraz application 6, 120 and 220 µg/kg. The limit of quantification was 0.9 µg/kg, the calibration curves were linear in the concentration range from 2.5 to 125.0 ng/mL (the corresponding analyte content in honey is from 5.0 to 250.0 µg/kg), relative values of the standard deviations of repeatability and within-laboratory reproducibility did not exceed 3.4 and 5.9 %, respectively, the bias values varied from –8.2 to 5.6 %, the expanded uncertainty estimates of the results ranged from 12 to 16 % (P = 0.95). Instrumental limit of quantification, overall efficiency of the process and robustness were also evaluated during the validation process.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74313876","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

Optimization of the technology for obtaining guide RNA using plate automatic synthesizer 利用平板自动合成器获得向导RNA的工艺优化

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-29 DOI: 10.29235/1561-8331-2022-58-4-398-406

E. Ulashchik, T. P. Akhlamionok, P. Y. Baryshchyk, O. Sharko, V. Shmanai

引用次数: 0

Composite technology for the production of paper and cardboard including synthetic fibers 用于生产纸和纸板的复合技术，包括合成纤维

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-29 DOI: 10.29235/1561-8331-2022-58-4-418-422

U. Eshbaeva, A. Djalilov

引用次数: 0

Influence of rosin resin acids amides on the strength of interfiber bonds in paper in the z-direction 松香树脂、酸、酰胺对纸张纤维间键强度的影响

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-29 DOI: 10.29235/1561-8331-2022-58-4-407-417

V. Fleisher

{"title":"Influence of rosin resin acids amides on the strength of interfiber bonds in paper in the z-direction","authors":"V. Fleisher","doi":"10.29235/1561-8331-2022-58-4-407-417","DOIUrl":"https://doi.org/10.29235/1561-8331-2022-58-4-407-417","url":null,"abstract":"Resin acid amides of rosin, depending on the structure, can have both a hydrophobizing and hardening effect on paper pulps. It has been established that the developed products of rosin modification (adhesive rosin composition TMAS3N and polyamide resin ProChem DUO) containing amides of resin acids, when introduced into paper pulps made from fibrous suspensions of sulphate cellulose (unbleached and bleached) of coniferous and broad-leaved species and waste paper, different in the degree of grinding (25, 40 and 70 °ShR), contribute to the increase in the strength of interfiber bonds in paper in the z-direction. The effect of the TMAS-3N emulsion was compared with the traditionally used TM and AKD sizing emulsions. The introduction of the TMAS-3N emulsion into paper pulps (0.40 % of a. d. w.) provides the maximum increase in the strength of interfiber bonds in paper in the z-direction made from cellulose, equal to 16.7–88.6 %, and from waste paper – 19.4–75.4 %, which is 1.6–6.4 and 2.3–4.5 times more compared to TM emulsion, respectively. The achieved positive effect is due to the presence in the TMAS-3H emulsion of particles of the dispersed phase of hydroxyethylamides and aminoethyl ethers capable of forming hydrogen bonds with hydroxyl groups on the mating surfaces of cellulose fibers. Sizing paper stocks with AKD emulsion reduces the strength of interfiber bonds in paper in the z-direction over the entire range of paper content studied. Polyamide resin ProChem DUO, which is a polyaminoamide of rosin resin acids, at its content in paper stocks of 0.10 %, increases the strength of interfiber bonds in paper in the z-direction, made from cellulose and waste paper suspensions, by 50.0–92.3 and 44.4–63.5 %, respectively. The obtained results of increasing the strength of interfiber bonds in paper in the z-direction by resin acid amides of rosin are in full agreement with the mechanism of bridged bonds and the theory of hydrogen bonds.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89267205","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

Preparation, structure and photocatalytic activity of nanocomposites based on cerium oxide 氧化铈纳米复合材料的制备、结构及光催化性能

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-28 DOI: 10.29235/1561-8331-2022-58-4-351-359

I. Matsukevich, E. D. Yundel, N. Kulinich, Y. Yahorava, L. Kulbitskaya, T. F. Kuznetsova

{"title":"Preparation, structure and photocatalytic activity of nanocomposites based on cerium oxide","authors":"I. Matsukevich, E. D. Yundel, N. Kulinich, Y. Yahorava, L. Kulbitskaya, T. F. Kuznetsova","doi":"10.29235/1561-8331-2022-58-4-351-359","DOIUrl":"https://doi.org/10.29235/1561-8331-2022-58-4-351-359","url":null,"abstract":"Mesoporous CeO2 and MgO powders and nanocomposites based on them were synthesized by the method of self-propagating high-temperature synthesis, and the mutual influence of magnesium oxide and cerium oxide on the crystal structure, microstructure, and morphology of the obtained materials was studied. It has been established that CeO2 is formed on the surface of magnesium oxide, while the developed surface of the material is preserved. It has been established, that the sizes of CeO2 crystallites in the composition of nanocomposites change insignificantly and range from 6.5 to 7.4 nm, while the values of the specific surface area and average pore diameter of the studied samples depend on the composition and vary in the ranges of 19–41 m2/g and 11.9‒19 nm, respectively. The highest efficiency of photodegradation of dyes of acid telon blue and direct bright blue is observed for samples of MgO–CeO2 (30 mol.%) and MgO–CeO2 (50 mol.%) ‒ 98.5 and 92.5 %, respectively, taking into account the effect of direct photolytic decomposition under the influence of ultraviolet radiation.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73809309","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

Effect of crystallization conditions on modafinil substance polymorphism 结晶条件对莫达非尼物质多态性的影响

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2022-11-28 DOI: 10.29235/1561-8331-2022-58-4-360-368

E. G. Karankevich, Z. Kuvaeva, L. Kulbitskaya, A. Popov

引用次数: 0