Pub Date : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-105-107
Alexander F. Nechaev, Vadim A. Vinnitskii
This article presents the results of the analysis of the new edition of the Criteria for Classification of Disposable Radioactive Waste. The significance of the Government Decree No. 1929, its potential impact on the technology and economics of "defuse" of radioactive waste, as well as the semantic content, validity and quality of a number of novels presented in the document are discussed. The need for a broad discussion and revision of the government act before its entry into force on 01.01.2024 is noted.
{"title":"ON \"NEW\" CLASSIFICATION CRITERIA FOR RADIOACTIVE WASTE","authors":"Alexander F. Nechaev, Vadim A. Vinnitskii","doi":"10.36807/1998-9849-2023-66-92-105-107","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-105-107","url":null,"abstract":"This article presents the results of the analysis of the new edition of the Criteria for Classification of Disposable Radioactive Waste. The significance of the Government Decree No. 1929, its potential impact on the technology and economics of \"defuse\" of radioactive waste, as well as the semantic content, validity and quality of a number of novels presented in the document are discussed. The need for a broad discussion and revision of the government act before its entry into force on 01.01.2024 is noted.","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135261614","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-67-72
Olga D. Shuvaeva, Natalia A. Nesterova
The photophysical properties of Tb3+ ions in dilute aqueous solutions of 4methacryloylamidobenzoic acid and sodium styrenesulfonate copolymers have been studied. The influence of the concentration and ratio of the interacting components on the Tb3+ luminescence intensity is analyzed, and the optimal conditions corresponding to the maximum luminescence intensity of the solution are determined. The study of the cytotoxicity and antiviral activity of the samples showed the promise of using the copolymers and their complexes with lanthanide ions in antiviral therapy
{"title":"LUMINESCENT COMPLEXES OF TERBIUM IONS WITH BIOLOGICALLY ACTIVE MACROLIGANDS","authors":"Olga D. Shuvaeva, Natalia A. Nesterova","doi":"10.36807/1998-9849-2023-66-92-67-72","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-67-72","url":null,"abstract":"The photophysical properties of Tb3+ ions in dilute aqueous solutions of 4methacryloylamidobenzoic acid and sodium styrenesulfonate copolymers have been studied. The influence of the concentration and ratio of the interacting components on the Tb3+ luminescence intensity is analyzed, and the optimal conditions corresponding to the maximum luminescence intensity of the solution are determined. The study of the cytotoxicity and antiviral activity of the samples showed the promise of using the copolymers and their complexes with lanthanide ions in antiviral therapy","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135311407","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-97-104
Andrey M. Abyzov
A laboratory setup for chemical vapor deposition (CVD) at reduced pressure on powder of medium particle size in a fluidized bed (reactor load of 50 g of substrate) was described. Calculations of critical points for the onset of fluidization and entrainment of particles for various gases (Ar, C3H8, C4H10) at a temperature of 20–1000 °C under low vacuum (pressure of 5 kPa) were performed. Model experiments were carried out on the fluidization of corundum powder (granularity of ~300 μm) in an argon flow, as well as in the propane-butane mixture in the absence of CVD. The dependences of the hydrodynamic mode of fluidization on the nature of fluidizing gas, temperature and pressure were analyzed, which make it possible to plan the process of coating deposition itself.
{"title":"CHEMICAL VAPOR DEPOSITION OF PYROCARBON COATINGS ON POWDERS IN A FLUIDIZED BED. I. APPARATUS, FLUIDIZATION","authors":"Andrey M. Abyzov","doi":"10.36807/1998-9849-2023-66-92-97-104","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-97-104","url":null,"abstract":"A laboratory setup for chemical vapor deposition (CVD) at reduced pressure on powder of medium particle size in a fluidized bed (reactor load of 50 g of substrate) was described. Calculations of critical points for the onset of fluidization and entrainment of particles for various gases (Ar, C3H8, C4H10) at a temperature of 20–1000 °C under low vacuum (pressure of 5 kPa) were performed. Model experiments were carried out on the fluidization of corundum powder (granularity of ~300 μm) in an argon flow, as well as in the propane-butane mixture in the absence of CVD. The dependences of the hydrodynamic mode of fluidization on the nature of fluidizing gas, temperature and pressure were analyzed, which make it possible to plan the process of coating deposition itself.","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135261849","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-23-26
Anastasiya M. Sycheva, Alexsey I. Shashkov, Andrey S. Solomakhin, Andrey M. Shevchuk
The work discusses the study of the possibility of using thermal insulation coatings based on foam in construction. The relevance of the use of thermal insulation coatings is shown – energy saving, heat and noise protection, fire resistance. Advantages of thermal insulation coatings over existing materials are considered. The developed compositions of two environmentally friendly coatings based on organic-mineral compounds are given. The article describes methods of foam stabilization to extend the service life of thermal insulation coatings. The foam stabilization mechanism is based on sol-gel processes when using SiO2 sol and hydration processes when using cement. Foams obtained by those mechanisms are proposed to be called hardening building foams. The article describes the possibility of imparting different colors to thermal insulation coatings by introducing organic dyes into the foaming composition.
{"title":"THERMAL INSULATION COATINGS FOR VARIOUS PURPOSES","authors":"Anastasiya M. Sycheva, Alexsey I. Shashkov, Andrey S. Solomakhin, Andrey M. Shevchuk","doi":"10.36807/1998-9849-2023-66-92-23-26","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-23-26","url":null,"abstract":"The work discusses the study of the possibility of using thermal insulation coatings based on foam in construction. The relevance of the use of thermal insulation coatings is shown – energy saving, heat and noise protection, fire resistance. Advantages of thermal insulation coatings over existing materials are considered. The developed compositions of two environmentally friendly coatings based on organic-mineral compounds are given. The article describes methods of foam stabilization to extend the service life of thermal insulation coatings. The foam stabilization mechanism is based on sol-gel processes when using SiO2 sol and hydration processes when using cement. Foams obtained by those mechanisms are proposed to be called hardening building foams. The article describes the possibility of imparting different colors to thermal insulation coatings by introducing organic dyes into the foaming composition.","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135448353","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-108-117
Oleg O. Golubyatnikov, Evgeny I. Akulinin
The paper presents a new approach to the design of resource-saving pressure swing adsorption (PSA) installations for hydrogen recovery, which ensures a safe flow rate in the frontal layer of the block adsorbent using optimal programs for multi-stage smooth opening of the valves of the installation. The safe flow rate of 0.3 m/s was determined experimentally, which practically eliminates the abrasion of the adsorbent during the PSA process. An iterative algorithm was proposed to reduce the problem of optimal installation design to the problem of nonlinear programming. A number of optimization problems of design of the installation with a capacity of 100-4000 l/min STP and a hydrogen purity of 99.99%+ were solved using the example of a hydrogen 4-bed 4-step vacuum PSA. The optimal combinations of mode and design parameters of the PSA installation and the trends of their changes depending on capacity were determined. An exhaustive comparative analysis of PSA installations designed according to a new and traditional approach was carried out. It was found that installations designed according to the new approach secure a greater profit from hydrogen production by an average of 28.3% due to lower energy consumption for hydrogen production and weight and size characteristics (the length of the adsorbent layer and the inner diameter of the adsorber) compared to installations that are designed according to the traditional approach
{"title":"OPTIMAL DESIGN OF RESOURCE-SAVING ADSORPTION UNITS FOR HYDROGEN RECOVERY ON BLOCK ADSORBENTS","authors":"Oleg O. Golubyatnikov, Evgeny I. Akulinin","doi":"10.36807/1998-9849-2023-66-92-108-117","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-108-117","url":null,"abstract":"The paper presents a new approach to the design of resource-saving pressure swing adsorption (PSA) installations for hydrogen recovery, which ensures a safe flow rate in the frontal layer of the block adsorbent using optimal programs for multi-stage smooth opening of the valves of the installation. The safe flow rate of 0.3 m/s was determined experimentally, which practically eliminates the abrasion of the adsorbent during the PSA process. An iterative algorithm was proposed to reduce the problem of optimal installation design to the problem of nonlinear programming. A number of optimization problems of design of the installation with a capacity of 100-4000 l/min STP and a hydrogen purity of 99.99%+ were solved using the example of a hydrogen 4-bed 4-step vacuum PSA. The optimal combinations of mode and design parameters of the PSA installation and the trends of their changes depending on capacity were determined. An exhaustive comparative analysis of PSA installations designed according to a new and traditional approach was carried out. It was found that installations designed according to the new approach secure a greater profit from hydrogen production by an average of 28.3% due to lower energy consumption for hydrogen production and weight and size characteristics (the length of the adsorbent layer and the inner diameter of the adsorber) compared to installations that are designed according to the traditional approach","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135312932","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-6-10
Alexander N. Kudlash, Mariya Yu. Slayek, Svetlana A. Vorobyova
Bimetallic nanocomposite particles of FeCo and FeCo@SiO2 were prepared by chemical reduction of Co(II) and Fe(II) salts in solutions. The particle size, morphology and composition of the nanocomposites were studied by transmission and scanning electron microscopy, powder XRD, X-ray fluorescence and complex thermal analysis. It was established that the synthesized powders consist of spherical particles with an average size of 4 to 35 nm, which are aggregated into chains or more complex amorphous structures. It was shown that the calcination of samples in an inert atmosphere makes it possible to fix the crystalline phase of the FeCo alloy.
{"title":"SYNTHESIS OF NANOSIZED FeCo, FeCo@SiO2 PARTICLES AND THEIR PHYSICAL CHEMICAL INVESTIGATION","authors":"Alexander N. Kudlash, Mariya Yu. Slayek, Svetlana A. Vorobyova","doi":"10.36807/1998-9849-2023-66-92-6-10","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-6-10","url":null,"abstract":"Bimetallic nanocomposite particles of FeCo and FeCo@SiO2 were prepared by chemical reduction of Co(II) and Fe(II) salts in solutions. The particle size, morphology and composition of the nanocomposites were studied by transmission and scanning electron microscopy, powder XRD, X-ray fluorescence and complex thermal analysis. It was established that the synthesized powders consist of spherical particles with an average size of 4 to 35 nm, which are aggregated into chains or more complex amorphous structures. It was shown that the calcination of samples in an inert atmosphere makes it possible to fix the crystalline phase of the FeCo alloy.","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135447033","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-118-121
Vladimir I. Sidelnikov, Alexander V. Koksharov, Vladislav G. Nikeshin
Virtual sensor is a modern and industrially applicable tool for monitoring and controlling technological processes of pulp and paper enterprise. The article examines the problematic features and results of the introduction of the virtual sensor in production. The analysis of the obtained results was carried out by comparing the readings of the virtual analyzer and laboratory measurements. The article presents the results of the virtual sensor application in production during 2021 and 2022.
{"title":"EXPERIENCE OF VIRTUAL SENSORS USAGE IN PAPERMAKING PROCESSES","authors":"Vladimir I. Sidelnikov, Alexander V. Koksharov, Vladislav G. Nikeshin","doi":"10.36807/1998-9849-2023-66-92-118-121","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-118-121","url":null,"abstract":"Virtual sensor is a modern and industrially applicable tool for monitoring and controlling technological processes of pulp and paper enterprise. The article examines the problematic features and results of the introduction of the virtual sensor in production. The analysis of the obtained results was carried out by comparing the readings of the virtual analyzer and laboratory measurements. The article presents the results of the virtual sensor application in production during 2021 and 2022.","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135317835","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-27-30
Nguyen Hong Thanh, Roman O. Olekhnovich, Mayya V. Uspenskaya, Vera E. Sitnikova, Collins Ngoe Elangwe
In this study, a PHB nanofiber mat with various concentrations of PHH was successfully prepared by the electrospinning method. The morphology of the PHB nanofibers was observed by the microscope. Fourier transform infrared spectroscopy (FTIR) was used to evaluate the characteristic groups for the PHB sample with various concentrations of PHH in pellet and nanofibers mat form. DSC analysis was used to investigate the change in melting point and the crystallization temperature of PHB with various concentrations of PHH. TG and DTG were used to test the decomposition temperature as well as the mass loss of PHB pellet and PHB nanofiber mat with various concentrations of PHH. The DSC, DTA, and TGA thermal analysis results showed that the melting, glass transition, decomposition initiation, and decomposition termination temperatures decreased with increasing PHH concentrations
{"title":"EFFECT OF POLYMER RATIO ON THERMAL PROPERTIES OF POLYHYDROXYBUTYRATE/POLYHYDROXYHEXANOATE","authors":"Nguyen Hong Thanh, Roman O. Olekhnovich, Mayya V. Uspenskaya, Vera E. Sitnikova, Collins Ngoe Elangwe","doi":"10.36807/1998-9849-2023-66-92-27-30","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-27-30","url":null,"abstract":"In this study, a PHB nanofiber mat with various concentrations of PHH was successfully prepared by the electrospinning method. The morphology of the PHB nanofibers was observed by the microscope. Fourier transform infrared spectroscopy (FTIR) was used to evaluate the characteristic groups for the PHB sample with various concentrations of PHH in pellet and nanofibers mat form. DSC analysis was used to investigate the change in melting point and the crystallization temperature of PHB with various concentrations of PHH. TG and DTG were used to test the decomposition temperature as well as the mass loss of PHB pellet and PHB nanofiber mat with various concentrations of PHH. The DSC, DTA, and TGA thermal analysis results showed that the melting, glass transition, decomposition initiation, and decomposition termination temperatures decreased with increasing PHH concentrations","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135263872","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 : 2023-01-01DOI: 10.36807/1998-9849-2023-66-92-84-91
Anna V. Naumova, Victor A. Utsal, Alexander L. Ishevsky, Anastasiya N. Yakkola, Igor A. Naumov
This article reviews the methods of quality control and safety of fish. Special attention was paid to shelf life and to improving the quality and safety of live, chilled and frozen fish. By the methods of gas-liquid chromatography-mass spectrometry, the analysis was carried out and the content of markers of destructive processes in fish of various fat content was determined with the aim of their subsequent use for express analysis of the quality and safety of the product under study.
{"title":"SEARCH FOR BIOMARKERS TO ASSESS THE QUALITY AND SAFETY OF FISH DURING STORAGE","authors":"Anna V. Naumova, Victor A. Utsal, Alexander L. Ishevsky, Anastasiya N. Yakkola, Igor A. Naumov","doi":"10.36807/1998-9849-2023-66-92-84-91","DOIUrl":"https://doi.org/10.36807/1998-9849-2023-66-92-84-91","url":null,"abstract":"This article reviews the methods of quality control and safety of fish. Special attention was paid to shelf life and to improving the quality and safety of live, chilled and frozen fish. By the methods of gas-liquid chromatography-mass spectrometry, the analysis was carried out and the content of markers of destructive processes in fish of various fat content was determined with the aim of their subsequent use for express analysis of the quality and safety of the product under study.","PeriodicalId":475802,"journal":{"name":"Izvestiâ Sankt-Peterburgskogo gosudarstvennogo tehnologičeskogo instituta (tehničeskogo universiteta)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314224","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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