Pub Date : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.035
E. Mishchenko, E. Timofeeva, A. Artamonov, M. Koroleva
This work presents the results of a study on the effect of ionic surfactant cetriltrimethylammonium chloride (CTAB) on the size and ζ-potential of lipid nanoemulsions composed of oleic acid, prepared by temperature phase inversion method and stabilized by nonionic surfactants — Tween 60, Span 60
{"title":"Study of the stability of lipid nanoemulsions with oleic acid","authors":"E. Mishchenko, E. Timofeeva, A. Artamonov, M. Koroleva","doi":"10.37614/2307-5252.2021.2.5.035","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.035","url":null,"abstract":"This work presents the results of a study on the effect of ionic surfactant cetriltrimethylammonium chloride (CTAB) on the size and ζ-potential of lipid nanoemulsions composed of oleic acid, prepared by temperature phase inversion method and stabilized by nonionic surfactants — Tween 60, Span 60","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130676714","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.030
O. Kuznetsova, A. M. Levin, M. Sevostyanov
The process of electrochemical processing of the VNZh type heavy tungsten alloy (wt. %: 80 W, 16 Ni, 4 Fe) under the action of direct and alternating current of industrial frequency in an ammonia-alkaline solution has been investigated. It was found, that the process is accompanied by the transition of tungsten from the alloy to the solution and the formation of a microdispersed powder, based on iron and nickel.
{"title":"Obtaining microdispersed iron-nickel powder in the process of electrochemical processing of VNZh type heavy tungsten alloys","authors":"O. Kuznetsova, A. M. Levin, M. Sevostyanov","doi":"10.37614/2307-5252.2021.2.5.030","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.030","url":null,"abstract":"The process of electrochemical processing of the VNZh type heavy tungsten alloy (wt. %: 80 W, 16 Ni, 4 Fe) under the action of direct and alternating current of industrial frequency in an ammonia-alkaline solution has been investigated. It was found, that the process is accompanied by the transition of tungsten from the alloy to the solution and the formation of a microdispersed powder, based on iron and nickel.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128769531","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}
{"title":"Study of coloured anodized coatings on aluminum alloy by electrochemical impedance spectroscopy","authors":"K. I. Oskin, N. Yakovleva, E. Chupakhina, K. Stepanova, A. N. Kokatev","doi":"10.37614/2307-5252.2021.2.5.041","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.041","url":null,"abstract":"Anodizing, porous anodic alumina, electrochemical impedance spectroscopy, electrolytic coloring, hydrothermal sealing, equivalent electrical circuit, simulation.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"14 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124990565","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.056
A. Shirokikh, M. Koroleva, E. Yurtov
In this work, we studied the effect of yttrium stearate on the physicochemical properties of dispersions of solid lipid nanoparticles composed of stearic acid stabilized with nonionic surfactants (Tween 60, Span 60). The results showed that an increase in the concentration of yttrium stearate leads to increasing kinetic stability and decreasing the average size of the aggregates. Along with this, the average size of single particles remains practically unchanged and amounts to 35±5 nm.
{"title":"Solid lipid nanoparticles with stearic acid stabilized with yttrium stearate","authors":"A. Shirokikh, M. Koroleva, E. Yurtov","doi":"10.37614/2307-5252.2021.2.5.056","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.056","url":null,"abstract":"In this work, we studied the effect of yttrium stearate on the physicochemical properties of dispersions of solid lipid nanoparticles composed of stearic acid stabilized with nonionic surfactants (Tween 60, Span 60). The results showed that an increase in the concentration of yttrium stearate leads to increasing kinetic stability and decreasing the average size of the aggregates. Along with this, the average size of single particles remains practically unchanged and amounts to 35±5 nm.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126126921","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.022
V. A. Imideev, A. O. Berbenev, P. Aleksandrov
The article describes a perspective combined method of treatment molybdenite concentrate based on roasting with sodium carbonate and following water leaching process. This method is characterized by almost completely binding of the sulfur compounds into water-soluble sodium sulfate, conversion of molybdenite into water-soluble odium molybdate, and if concentrate contains rhenium - transform into water-soluble sodium perrhenate.
{"title":"Combined method for processing molybdenite concentrates based on firing with sodium carbonate","authors":"V. A. Imideev, A. O. Berbenev, P. Aleksandrov","doi":"10.37614/2307-5252.2021.2.5.022","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.022","url":null,"abstract":"The article describes a perspective combined method of treatment molybdenite concentrate based on roasting with sodium carbonate and following water leaching process. This method is characterized by almost completely binding of the sulfur compounds into water-soluble sodium sulfate, conversion of molybdenite into water-soluble odium molybdate, and if concentrate contains rhenium - transform into water-soluble sodium perrhenate.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125705844","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.043
R. V. Saprykin, S. Semenov
Nickel (II) and cobalt (II) salts were synthesized with saturated monocarboxylic acids: butyric, valeric, nylon,enanthic, and caprylic. The obtained compounds were characterized by elemental analysis, IR spectroscopy,and differential scanning calorimetry. As a result of thermolysis of the synthesized carboxylates, nanocomposites were obtained, which were studied by scanning and transmission electron microscopy, elemental analysis, IR spectroscopy, energy dispersive X-ray spectroscopy, and X-ray phase analysis. The magnetic properties of the obtained nanocomposites have been studied.
{"title":"Obtaining and studying the properties of cobalt- and nickel-containing nanocomposites by thermolysis, using saturated carboxylates as precedors","authors":"R. V. Saprykin, S. Semenov","doi":"10.37614/2307-5252.2021.2.5.043","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.043","url":null,"abstract":"Nickel (II) and cobalt (II) salts were synthesized with saturated monocarboxylic acids: butyric, valeric, nylon,enanthic, and caprylic. The obtained compounds were characterized by elemental analysis, IR spectroscopy,and differential scanning calorimetry. As a result of thermolysis of the synthesized carboxylates, nanocomposites were obtained, which were studied by scanning and transmission electron microscopy, elemental analysis, IR spectroscopy, energy dispersive X-ray spectroscopy, and X-ray phase analysis. The magnetic properties of the obtained nanocomposites have been studied.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129927809","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.029
E. V. Kuznetsova
The acid-base properties of the glauconite surface has been studied by potentiometric titration. Using a surface complexation model with a constant exchange capacity, it was shown that positively charged surface centers and exchange centers dominate in the acidic pH region, and negatively charged centers dominate in the neutral and alkaline regions. The corresponding constants of acid-base equilibrium have been calculated. The data obtained were used to study the sorption of cadmium and lead on glauconite.
{"title":"Study of the surface properties of glauconite","authors":"E. V. Kuznetsova","doi":"10.37614/2307-5252.2021.2.5.029","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.029","url":null,"abstract":"The acid-base properties of the glauconite surface has been studied by potentiometric titration. Using a surface complexation model with a constant exchange capacity, it was shown that positively charged surface centers and exchange centers dominate in the acidic pH region, and negatively charged centers dominate in the neutral and alkaline regions. The corresponding constants of acid-base equilibrium have been calculated. The data obtained were used to study the sorption of cadmium and lead on glauconite.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129114087","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.013
V. Y. Vinogradov, A. Kalinkin, V. Kuznetsov
Solid-phase synthesis of cerium-containing solid solutions based on ZrSiO4 was described. The synthesis was carried out using mechanical activation of a mixture consisting of zirconium oxide and hydrated amorphous silica with the addition of cerium oxide at a molar ratio of ZrО2:SiО2:CeО2 equal to 0.95:1.00:0.05. The mechanically activated in a centrifugal planetary mill mixture of reagents was calcined in the temperature range of 1200–1600 °C for 3 hours, which was accompanied by the essentially complete synthesis of zircon. The cerium content in the zircon structure was calculated from X-ray powder diffraction data.
{"title":"Using of mechanoactivation for preparation of cerium-containing solid solutions based on zircon","authors":"V. Y. Vinogradov, A. Kalinkin, V. Kuznetsov","doi":"10.37614/2307-5252.2021.2.5.013","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.013","url":null,"abstract":"Solid-phase synthesis of cerium-containing solid solutions based on ZrSiO4 was described. The synthesis was carried out using mechanical activation of a mixture consisting of zirconium oxide and hydrated amorphous silica with the addition of cerium oxide at a molar ratio of ZrО2:SiО2:CeО2 equal to 0.95:1.00:0.05. The mechanically activated in a centrifugal planetary mill mixture of reagents was calcined in the temperature range of 1200–1600 °C for 3 hours, which was accompanied by the essentially complete synthesis of zircon. The cerium content in the zircon structure was calculated from X-ray powder diffraction data.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127674602","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.009
Yuriy O. Velyaev, D. Maiorov
The process of sorption of phosphate ion by silicon dioxide obtained by acid decomposition of nepheline is studied. The experimental data were processed using the Freundlich and Langmuir sorption equations, which showed that the sorption process is fairly accurately described by both equations, while the use of the Langmuir monomolecular adsorption equation is preferable in the calculations. The capacity of the adsorption monolayer of the synthesized sample relative to the РО43–-ion and the adsorption equilibrium constant are calculated. Based on the obtained data, various options for sorption treatment of municipal wastewater from РО43--ion to normalized MPC values were evaluated.
{"title":"The study of phosphate ions sorption from silicon dioxide solutions obtained by using acid decomposition of nepheline","authors":"Yuriy O. Velyaev, D. Maiorov","doi":"10.37614/2307-5252.2021.2.5.009","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.009","url":null,"abstract":"The process of sorption of phosphate ion by silicon dioxide obtained by acid decomposition of nepheline is studied. The experimental data were processed using the Freundlich and Langmuir sorption equations, which showed that the sorption process is fairly accurately described by both equations, while the use of the Langmuir monomolecular adsorption equation is preferable in the calculations. The capacity of the adsorption monolayer of the synthesized sample relative to the РО43–-ion and the adsorption equilibrium constant are calculated. Based on the obtained data, various options for sorption treatment of municipal wastewater from РО43--ion to normalized MPC values were evaluated.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125940719","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 : 2021-12-13DOI: 10.37614/2307-5252.2021.2.5.044
S. Safaryan, M. L. Belikov, V. Krysanova
The article presents the results of the studies of the physicochemical and photocatalytic properties of titanium dioxide modified with manganese, by the example of decomposition of organic dyes — ferroin and methylene blue. The correlations between the specific surface area and phase composition of the composites with their photocatalytic activity are revealed.
{"title":"Titanium dioxide modified with manganese: physicochemical and photocatalytic properties","authors":"S. Safaryan, M. L. Belikov, V. Krysanova","doi":"10.37614/2307-5252.2021.2.5.044","DOIUrl":"https://doi.org/10.37614/2307-5252.2021.2.5.044","url":null,"abstract":"The article presents the results of the studies of the physicochemical and photocatalytic properties of titanium dioxide modified with manganese, by the example of decomposition of organic dyes — ferroin and methylene blue. The correlations between the specific surface area and phase composition of the composites with their photocatalytic activity are revealed.","PeriodicalId":438304,"journal":{"name":"Transaction Kola Science Centre","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125779092","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：