Pub Date : 2023-10-04DOI: 10.1134/S1061933X23600446
A. V. Volkova, E. S. Lopatina, E. V. Solovyeva, L. E. Ermakova
Powders of magnetite and its composites have been obtained on the basis of macroporous high-silica glass particles containing different amounts of Fe3O4. XRD, XPS, and Raman spectroscopy have been employed to confirm the formation of a magnetite phase in all iron-containing samples. The surface morphology and elemental composition of porous composite particles have been studied by SEM and EDX methods. It has been found that the external surface of porous silica particles is modified to different extents. It has been shown that the position of the isoelectric point (IEP) and the values of the zeta-potentials for the composites coincide in indifferent electrolyte solutions. Two isoelectric points are observed in the pH dependences of the zeta-potential for the composite particles in nickel chloride solutions. In dilute solutions containing specifically adsorbed nickel ions and at pH below pHIEP-2, the electrokinetic properties of the composite particles are primarily affected by magnetite phase content in a composite powder and, at rather high concentrations of Ni2+ ions, by their specificity with respect to oxide surfaces.
{"title":"Effect of Magnetite Content and Specificity of Nickel(II) Ions on Electrokinetic Properties of Composites Based on Porous Silica Particles","authors":"A. V. Volkova, E. S. Lopatina, E. V. Solovyeva, L. E. Ermakova","doi":"10.1134/S1061933X23600446","DOIUrl":"10.1134/S1061933X23600446","url":null,"abstract":"<p>Powders of magnetite and its composites have been obtained on the basis of macroporous high-silica glass particles containing different amounts of Fe<sub>3</sub>O<sub>4</sub>. XRD, XPS, and Raman spectroscopy have been employed to confirm the formation of a magnetite phase in all iron-containing samples. The surface morphology and elemental composition of porous composite particles have been studied by SEM and EDX methods. It has been found that the external surface of porous silica particles is modified to different extents. It has been shown that the position of the isoelectric point (IEP) and the values of the zeta-potentials for the composites coincide in indifferent electrolyte solutions. Two isoelectric points are observed in the pH dependences of the zeta-potential for the composite particles in nickel chloride solutions. In dilute solutions containing specifically adsorbed nickel ions and at pH below pH<sub>IEP-2</sub>, the electrokinetic properties of the composite particles are primarily affected by magnetite phase content in a composite powder and, at rather high concentrations of Ni<sup>2+</sup> ions, by their specificity with respect to oxide surfaces.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41086658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-04DOI: 10.1134/S1061933X23700199
A. I. Grigor’ev, N. Yu. Kolbneva, S. O. Shiryaeva
Theoretical asymptotic calculations linear with respect to small dimensionless amplitude of oscillations have been employed to study the influence of the viscoelastic properties of a charged droplet of an electrically conducting viscous liquid on the intensity of its electromagnetic radiation. It has been shown that allowance for the effect of viscosity relaxation leads to a decrease in the damping decrement value, which is determined by energy losses for electromagnetic wave emission, and the intensity of high-frequency electromagnetic radiation; a substantial reduction in the viscous damping decrement of small cloud droplets; and an essential dependence of the viscous damping decrement on the characteristic relaxation time. It has been found that the viscosity relaxation of a liquid has no significant effect on damped capillary oscillations and electromagnetic radiation of rain droplets. Viscoelasticity and viscosity of the liquid do not influence the conditions critical for the realization of the electrostatic instability of a droplet with respect to its own charge.
{"title":"On the Effect of Viscosity Relaxation on Electromagnetic Radiation Intensity of an Oscillating Charged Droplet","authors":"A. I. Grigor’ev, N. Yu. Kolbneva, S. O. Shiryaeva","doi":"10.1134/S1061933X23700199","DOIUrl":"10.1134/S1061933X23700199","url":null,"abstract":"<p>Theoretical asymptotic calculations linear with respect to small dimensionless amplitude of oscillations have been employed to study the influence of the viscoelastic properties of a charged droplet of an electrically conducting viscous liquid on the intensity of its electromagnetic radiation. It has been shown that allowance for the effect of viscosity relaxation leads to a decrease in the damping decrement value, which is determined by energy losses for electromagnetic wave emission, and the intensity of high-frequency electromagnetic radiation; a substantial reduction in the viscous damping decrement of small cloud droplets; and an essential dependence of the viscous damping decrement on the characteristic relaxation time. It has been found that the viscosity relaxation of a liquid has no significant effect on damped capillary oscillations and electromagnetic radiation of rain droplets. Viscoelasticity and viscosity of the liquid do not influence the conditions critical for the realization of the electrostatic instability of a droplet with respect to its own charge.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41086669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-04DOI: 10.1134/S1061933X23600410
A. P. Safronov, I. V. Beketov, A. V. Bagazeev, A. I. Medvedev, A. M. Murzakaev, T. V. Terziyan, A. Yu. Zubarev
Abstract—
Nickel nanoparticles are obtained by electrical explosion of wire under the action of a high-voltage discharge followed by condensation in an inert gas medium. When butane is added to the gas medium, a carbon shell is deposited onto the condensing nickel particles. Immediately after the synthesis, liquid-phase modification of nanoparticles is carried out with aqueous solutions of polysaccharides agarose and gellan. As a result, a polymer shell is formed on particles of Ni and nickel particles coated with a carbon shell (Ni@C). The dispersity, crystalline structure, and magnetic properties of Ni and Ni@C nanoparticles are characterized by transmission microscopy, X-ray diffraction analysis, and vibration magnetometry. The total carbon content on the surface of the nanoparticles is determined by thermal analysis with simultaneous mass spectrometry. It is shown that, under the studied conditions, polysaccharides are deposited onto the nanoparticles in amounts up to 2 wt % to form a shell with a thickness of about 4 nm. When agarose is used as a modifier, the content of the polysaccharide increases with the concentration of the modifying solution. When gellan is used as a modifier, a more complex concentration dependence is observed: an initial increase is followed by a decrease in the amount of deposited polysaccharide. The results are discussed from the viewpoint of the influence of the molecular weight of a polymer on the adsorption process.
{"title":"In Situ Encapsulation of Nickel Nanoparticles in Polysaccharide Shells during Their Fabrication by Electrical Explosion of Wire","authors":"A. P. Safronov, I. V. Beketov, A. V. Bagazeev, A. I. Medvedev, A. M. Murzakaev, T. V. Terziyan, A. Yu. Zubarev","doi":"10.1134/S1061933X23600410","DOIUrl":"10.1134/S1061933X23600410","url":null,"abstract":"<div><div><h3>\u0000 <b>Abstract</b>—</h3><p>Nickel nanoparticles are obtained by electrical explosion of wire under the action of a high-voltage discharge followed by condensation in an inert gas medium. When butane is added to the gas medium, a carbon shell is deposited onto the condensing nickel particles. Immediately after the synthesis, liquid-phase modification of nanoparticles is carried out with aqueous solutions of polysaccharides agarose and gellan. As a result, a polymer shell is formed on particles of Ni and nickel particles coated with a carbon shell (Ni@C). The dispersity, crystalline structure, and magnetic properties of Ni and Ni@C nanoparticles are characterized by transmission microscopy, X-ray diffraction analysis, and vibration magnetometry. The total carbon content on the surface of the nanoparticles is determined by thermal analysis with simultaneous mass spectrometry. It is shown that, under the studied conditions, polysaccharides are deposited onto the nanoparticles in amounts up to 2 wt % to form a shell with a thickness of about 4 nm. When agarose is used as a modifier, the content of the polysaccharide increases with the concentration of the modifying solution. When gellan is used as a modifier, a more complex concentration dependence is observed: an initial increase is followed by a decrease in the amount of deposited polysaccharide. The results are discussed from the viewpoint of the influence of the molecular weight of a polymer on the adsorption process.</p><figure><div><div><div><picture><img></picture></div></div></div></figure></div></div>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41086646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.1134/s1061933x23600689
N. M. Murashova
{"title":"Lecithin Microemulsions as Drug Carriers","authors":"N. M. Murashova","doi":"10.1134/s1061933x23600689","DOIUrl":"https://doi.org/10.1134/s1061933x23600689","url":null,"abstract":"","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139330119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.1134/s1061933x23600744
M. Merkulova, N. S. Osipova, A. V. Kalistratova, Yu. V. Ermolenko, S. E. Gel’perina
{"title":"Etoposide-Loaded Colloidal Delivery Systems Based on Biodegradable Polymeric Carriers","authors":"M. Merkulova, N. S. Osipova, A. V. Kalistratova, Yu. V. Ermolenko, S. E. Gel’perina","doi":"10.1134/s1061933x23600744","DOIUrl":"https://doi.org/10.1134/s1061933x23600744","url":null,"abstract":"","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139327728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.1134/s1061933x2360077x
E. V. Kuznetsova, N. M. Kuznetsov
{"title":"Colloidal Objects in Biomedicine: Modern Trends and Prospects","authors":"E. V. Kuznetsova, N. M. Kuznetsov","doi":"10.1134/s1061933x2360077x","DOIUrl":"https://doi.org/10.1134/s1061933x2360077x","url":null,"abstract":"","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-24DOI: 10.19110/1994-5655-2023-3-79-85
S. Ivanov
Mining waste products have a significant effect on the vulnerable natural environment of the Arctic and the human health. So, the problem of mining waste utilization is of a particular relevance for the Murmansk Region. The article discusses the existing legal and regulatory framework, promising directions for the development of technologies in this area, and the current waste utilization methods. The author highlights the practical results of mining waste disposal. The tailings facilities (TSF) are considered as technogenic deposits with a low content of valuable components and so can be used in the building industry due to low cost of such materials and reduction of environmental damage during TSF removal.
{"title":"On the possibilities of mining waste utilization in the Murmansk Region","authors":"S. Ivanov","doi":"10.19110/1994-5655-2023-3-79-85","DOIUrl":"https://doi.org/10.19110/1994-5655-2023-3-79-85","url":null,"abstract":"Mining waste products have a significant effect on the vulnerable natural environment of the Arctic and the human health. So, the problem of mining waste utilization is of a particular relevance for the Murmansk Region. The article discusses the existing legal and regulatory framework, promising directions for the development of technologies in this area, and the current waste utilization methods. The author highlights the practical results of mining waste disposal. The tailings facilities (TSF) are considered as technogenic deposits with a low content of valuable components and so can be used in the building industry due to low cost of such materials and reduction of environmental damage during TSF removal.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84095086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-24DOI: 10.19110/1994-5655-2023-3-86-97
I. Mal'ceva
The article studies the concepts of sustainable agriculture and the factors of internal and external systems influencing its formation. Having surveyed the principles of sustainable agriculture, the author clarified that the agricultural sustainability largely depends on the efficient management of natural systems and resources. The work presents a conceptual model for sustainable agriculture and rural areas defined as a socio-economic-natural complex system that includes three subsystems as agrarian-economic, rural-ecologic, and rural-social subsystems. The purpose of the integrated system is to coordinate the interaction and interconnection between the rural subsystems and their components to achieve harmony between agricultural production, the rural environment, and the well-being of peasants and rural residents. The modern methods of sustainable agriculture, and therefore sustainable resource management, mean the resource-saving, organic, biodynamic, climatically optimized, regenerative agriculture, relate to sustainable intensification and resource-saving agriculture. To form the agricultural sustainability in the northern region, the author proposes new approaches to its development such as the integrated farming system, agroforestry, site specific crop farming, integrated nutrient management and integrated pest management.
{"title":"Economics, organization and management of enterprises, industries, and complexes","authors":"I. Mal'ceva","doi":"10.19110/1994-5655-2023-3-86-97","DOIUrl":"https://doi.org/10.19110/1994-5655-2023-3-86-97","url":null,"abstract":"The article studies the concepts of sustainable agriculture and the factors of internal and external systems influencing its formation. Having surveyed the principles of sustainable agriculture, the author clarified that the agricultural sustainability largely depends on the efficient management of natural systems and resources. The work presents a conceptual model for sustainable agriculture and rural areas defined as a socio-economic-natural complex system that includes three subsystems as agrarian-economic, rural-ecologic, and rural-social subsystems. The purpose of the integrated system is to coordinate the interaction and interconnection between the rural subsystems and their components to achieve harmony between agricultural production, the rural environment, and the well-being of peasants and rural residents. The modern methods of sustainable agriculture, and therefore sustainable resource management, mean the resource-saving, organic, biodynamic, climatically optimized, regenerative agriculture, relate to sustainable intensification and resource-saving agriculture. To form the agricultural sustainability in the northern region, the author proposes new approaches to its development such as the integrated farming system, agroforestry, site specific crop farming, integrated nutrient management and integrated pest management.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86250746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-24DOI: 10.19110/1994-5655-2023-3-103-111
V. Lazhencev
The author sees the uncertainty of the spatial development themes in the disagreement of interpretation of the research subject, the substitution of specific spatial processes by general regional economy postulates, the combination of concepts and methods for studying the spatial and territorial aspects of socio-economic development, the lack of consistency in the organization of practical work in the field of state management of the spatial structure of Russia. Economic mismanagement relates to the difficulties of combining the constitutional provisions on the unity of the market space and the objective necessity for its administrative regulators of a non-market nature. The positive examples of studying the possibilities of optimizing the space of people’s life activity allow us to understand the subject essence of research in this area of science.
{"title":"About the spatial development (judgment about the subject and methodology uncertainty)","authors":"V. Lazhencev","doi":"10.19110/1994-5655-2023-3-103-111","DOIUrl":"https://doi.org/10.19110/1994-5655-2023-3-103-111","url":null,"abstract":"The author sees the uncertainty of the spatial development themes in the disagreement of interpretation of the research subject, the substitution of specific spatial processes by general regional economy postulates, the combination of concepts and methods for studying the spatial and territorial aspects of socio-economic development, the lack of consistency in the organization of practical work in the field of state management of the spatial structure of Russia. Economic mismanagement relates to the difficulties of combining the constitutional provisions on the unity of the market space and the objective necessity for its administrative regulators of a non-market nature. The positive examples of studying the possibilities of optimizing the space of people’s life activity allow us to understand the subject essence of research in this area of science.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89541482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-24DOI: 10.19110/1994-5655-2023-3-35-43
N. Zhuravlev
The northern regions of our country are characterized by a significant migration decline. The Komi Republic stands out among them with the highest values of indicators of migration outflow of the population. Operating with statistical data, the article analyzes the migration processes of the Komi Republic for the period from 1990 to 2020. The purpose of the study is to identify the features of migration in the region, depending on its direction and period. The article presents the results of the analysis of migration turnover, the specifics of migration flows of internal and interregional migration, as well as the dynamics of migration exchange between urban and rural territories. According to the re¬sults, it was found that internal migration flows are directed to the capital of the region, acting as a socio-economic and educational center. The largest outflow of population is char¬acteristic of cities whose economic specialization has now lost relevance. Migration within the region is characterized by an influx of population from rural areas to the city, and the share of the village in interregional migration is significantly inferior to the city. Despite the continuing migration decline of the population, the intensity of migration is decreasing by 2020, due to a decrease in the number of both departures and arrivals, the difference between migration from the city and from the countryside is decreasing.
{"title":"Features of migration processes of the Komi Republic in 1990-2020","authors":"N. Zhuravlev","doi":"10.19110/1994-5655-2023-3-35-43","DOIUrl":"https://doi.org/10.19110/1994-5655-2023-3-35-43","url":null,"abstract":"The northern regions of our country are characterized by a significant migration decline. The Komi Republic stands out among them with the highest values of indicators of migration outflow of the population. Operating with statistical data, the article analyzes the migration processes of the Komi Republic for the period from 1990 to 2020. The purpose of the study is to identify the features of migration in the region, depending on its direction and period. The article presents the results of the analysis of migration turnover, the specifics of migration flows of internal and interregional migration, as well as the dynamics of migration exchange between urban and rural territories. According to the re¬sults, it was found that internal migration flows are directed to the capital of the region, acting as a socio-economic and educational center. The largest outflow of population is char¬acteristic of cities whose economic specialization has now lost relevance. Migration within the region is characterized by an influx of population from rural areas to the city, and the share of the village in interregional migration is significantly inferior to the city. Despite the continuing migration decline of the population, the intensity of migration is decreasing by 2020, due to a decrease in the number of both departures and arrivals, the difference between migration from the city and from the countryside is decreasing.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73604459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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