Pub Date : 2022-06-01DOI: 10.23939/ctas2022.01.173
O. Grytsenko, Ľ. Dulebová, N. Baran, B. Berezhnyy, P. Voloshkevych
The paper presents the results of the study of copolymerization of 2-hydroxyethylmethacrylate (HEMA) with polyvinylpyrrolidone (PVP) under the action of two-component initiation systems of iron (II) sulfate/radical type initiator. The influence of the nature of the radical initiator (In) in the FeSO4/In system on the behavior of the polymerization of HEMA/PVP compositions, structural parameters of the polymer matrix network and properties of hydrogels based on pHEMA-gr-PVP copolymers were established.
{"title":"Synthesis of polyvinylpyrolidone copolymers in the presence of two-component initiation systems","authors":"O. Grytsenko, Ľ. Dulebová, N. Baran, B. Berezhnyy, P. Voloshkevych","doi":"10.23939/ctas2022.01.173","DOIUrl":"https://doi.org/10.23939/ctas2022.01.173","url":null,"abstract":"The paper presents the results of the study of copolymerization of 2-hydroxyethylmethacrylate (HEMA) with polyvinylpyrrolidone (PVP) under the action of two-component initiation systems of iron (II) sulfate/radical type initiator. The influence of the nature of the radical initiator (In) in the FeSO4/In system on the behavior of the polymerization of HEMA/PVP compositions, structural parameters of the polymer matrix network and properties of hydrogels based on pHEMA-gr-PVP copolymers were established.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90247583","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 : 2022-06-01DOI: 10.23939/ctas2022.01.127
V. Chervetsova, A. Dmytriv, V. Havryliak, V. Lubenets
Some morphological, physiological and biochemical characteristics of the probiotic species of lactic acid bacteria Lactobacillus reuteri are presented in the work. This species, according to literature sources, were isolated from the normal human microbiota, other members of the class Mammalia, as well as broilers and sourdough. The study of literature and Internet sources identified the importance of using different strains of L. reuteri in modern dietary supplements.Some physiological features of this microorganism in terms of positive effects on the functioning of the human gastrointestinal tract and the formation of immunity were considered. According to processed datait is concluded that there is a necessity for further practical study of L. reuteri as a potential probiotic for the pharmaceutical and food industries.
{"title":"Some mechanisms of Lactobacillus reuteri action as a probiotic microorganism","authors":"V. Chervetsova, A. Dmytriv, V. Havryliak, V. Lubenets","doi":"10.23939/ctas2022.01.127","DOIUrl":"https://doi.org/10.23939/ctas2022.01.127","url":null,"abstract":"Some morphological, physiological and biochemical characteristics of the probiotic species of lactic acid bacteria Lactobacillus reuteri are presented in the work. This species, according to literature sources, were isolated from the normal human microbiota, other members of the class Mammalia, as well as broilers and sourdough. The study of literature and Internet sources identified the importance of using different strains of L. reuteri in modern dietary supplements.Some physiological features of this microorganism in terms of positive effects on the functioning of the human gastrointestinal tract and the formation of immunity were considered. According to processed datait is concluded that there is a necessity for further practical study of L. reuteri as a potential probiotic for the pharmaceutical and food industries.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90671918","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 : 2022-06-01DOI: 10.23939/ctas2022.01.029
Yaroslav Kalymon, A. Helesh, A. Slyuzar, O. Kurylets
The absorption of air oxygen by water in the horizontal absorber with bucket-shaped dispersants (HABD) and the vertical apparatus with a continuous bubbling layer (VABL) was studied. It is shown that these processes occur according to the law of First-Order Reactions. It was found that the constant absorption rate is 46.5 times higher in HABD than in VABL at a gas content of 0.05 and a bubble diameter of 0.002 m. It is recommended to use the VABL device for water deironing at pH <6, and for pH greater than 6.0 - HABD.
{"title":"Choice of mass exchange apparatus for groundwater deironing","authors":"Yaroslav Kalymon, A. Helesh, A. Slyuzar, O. Kurylets","doi":"10.23939/ctas2022.01.029","DOIUrl":"https://doi.org/10.23939/ctas2022.01.029","url":null,"abstract":"The absorption of air oxygen by water in the horizontal absorber with bucket-shaped dispersants (HABD) and the vertical apparatus with a continuous bubbling layer (VABL) was studied. It is shown that these processes occur according to the law of First-Order Reactions. It was found that the constant absorption rate is 46.5 times higher in HABD than in VABL at a gas content of 0.05 and a bubble diameter of 0.002 m. It is recommended to use the VABL device for water deironing at pH <6, and for pH greater than 6.0 - HABD.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78132850","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 : 2022-06-01DOI: 10.23939/ctas2022.01.140
I. Huzova, V. Atamanyuk
The kinetics of the process of drying hot (80C) and cold (20C) candied pears were studied. The drying coefficient is found and an analytical dependence is derived for the drying time calculation. Experimental data of the change in the temperature of the thermal agent along with the height of the candied fruit layer was obtained. It was proven that stopping the supply of a hot thermal agent at a certain point in time, cooling the upper layers of candied fruit with a cold thermal agent, and simultaneously drying the lower layers of candied fruit will reduce the energy costs of the process by 1135.64 kJ/kgwater.
{"title":"Study of kinetics and energy saving method in the process of drying candied fruits from pears","authors":"I. Huzova, V. Atamanyuk","doi":"10.23939/ctas2022.01.140","DOIUrl":"https://doi.org/10.23939/ctas2022.01.140","url":null,"abstract":"The kinetics of the process of drying hot (80C) and cold (20C) candied pears were studied. The drying coefficient is found and an analytical dependence is derived for the drying time calculation. Experimental data of the change in the temperature of the thermal agent along with the height of the candied fruit layer was obtained. It was proven that stopping the supply of a hot thermal agent at a certain point in time, cooling the upper layers of candied fruit with a cold thermal agent, and simultaneously drying the lower layers of candied fruit will reduce the energy costs of the process by 1135.64 kJ/kgwater.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86433885","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 : 2022-06-01DOI: 10.23939/ctas2022.01.012
Z. Borovets, І. Lutsyuk
The phase composition of ash and slag from thermal power stations (TPS) were studied. It was established that ashes from thermal power stations are not homogeneous glass in the structure and are characterized by the presence of a significant number of mullite and hercynite crystallization centers. The phase composition and structure of ash slag were investigated by XRF and SAR methods. It was established that the processes of crystallization of iron-aluminosilicate slag finishes at the stage of nucleation of crystals whose further growth becomes impossible because of the sharp increase of viscosity during cooling.
{"title":"PECULIARITIES OF THE PHASE COMPOSITION OF ASH AND SLAG WASTE FROM THE THERMAL POWER STATION","authors":"Z. Borovets, І. Lutsyuk","doi":"10.23939/ctas2022.01.012","DOIUrl":"https://doi.org/10.23939/ctas2022.01.012","url":null,"abstract":"The phase composition of ash and slag from thermal power stations (TPS) were studied. It was established that ashes from thermal power stations are not homogeneous glass in the structure and are characterized by the presence of a significant number of mullite and hercynite crystallization centers. The phase composition and structure of ash slag were investigated by XRF and SAR methods. It was established that the processes of crystallization of iron-aluminosilicate slag finishes at the stage of nucleation of crystals whose further growth becomes impossible because of the sharp increase of viscosity during cooling.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77775309","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 : 2022-06-01DOI: 10.23939/ctas2022.01.160
V. Krasinskyi, V. Kochubei, V. Zemke, Ľ. Dulebová, O. Ivanukh
The influence of additional thermal and thermomechanical treatment of PA6/MMT nanocomposites obtained from the formic acid solution on their heat resistance and technological properties was investigated. Thermal analysis established that heating the nanocomposite to a temperature of 250 ºС and treating it on a capillary plastometer IIRT at a temperature of 230 ºС increases the degree of crystallinity and heat resistance of the samples. It is shown that additionally treated nanocomposites also have lower fluidity and significantly higher values of softening temperature.
{"title":"Investigation of influence of conditions of obtaining PA6/MMT nanocomposites on their thermal properties","authors":"V. Krasinskyi, V. Kochubei, V. Zemke, Ľ. Dulebová, O. Ivanukh","doi":"10.23939/ctas2022.01.160","DOIUrl":"https://doi.org/10.23939/ctas2022.01.160","url":null,"abstract":"The influence of additional thermal and thermomechanical treatment of PA6/MMT nanocomposites obtained from the formic acid solution on their heat resistance and technological properties was investigated. Thermal analysis established that heating the nanocomposite to a temperature of 250 ºС and treating it on a capillary plastometer IIRT at a temperature of 230 ºС increases the degree of crystallinity and heat resistance of the samples. It is shown that additionally treated nanocomposites also have lower fluidity and significantly higher values of softening temperature.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"107 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79318819","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 : 2022-06-01DOI: 10.23939/ctas2022.01.096
A. Prokopalo, I. Maziar, N. Zayarnyuk, A. Krychkovska, O. Karpenko, V. Lubenets
Solutions of biologically active substances insoluble in water (thiosulfoesters, anthraquinone derivatives, pyrazoline) were obtained using a combined solvent and biogenic surfactants. For this purpose were used rhamnolipids, their biocomplex with polysaccharides synthesized by the Pseudomonas SP strain. PS-17, trehalosolipids of the Rhodococcus erythropolis AU-1 strain, and the commercial biosurfactant surfactant. Aqueous dispersed systems of the studied substances were also obtained. The research results have prospects for use in pharmacy.
{"title":"Combined solutions using biosurfactants based on water-insolute biologically active compounds","authors":"A. Prokopalo, I. Maziar, N. Zayarnyuk, A. Krychkovska, O. Karpenko, V. Lubenets","doi":"10.23939/ctas2022.01.096","DOIUrl":"https://doi.org/10.23939/ctas2022.01.096","url":null,"abstract":"Solutions of biologically active substances insoluble in water (thiosulfoesters, anthraquinone derivatives, pyrazoline) were obtained using a combined solvent and biogenic surfactants. For this purpose were used rhamnolipids, their biocomplex with polysaccharides synthesized by the Pseudomonas SP strain. PS-17, trehalosolipids of the Rhodococcus erythropolis AU-1 strain, and the commercial biosurfactant surfactant. Aqueous dispersed systems of the studied substances were also obtained. The research results have prospects for use in pharmacy.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91540995","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 : 2022-06-01DOI: 10.23939/ctas2022.01.056
M. Donchenko, O. Grynyshyn
A comparison of the ability of modifiers of different classes to slow down the aging processes occurring in petroleum bitumen during pavement operation is presented in the article. Oxidized and residual road bitumens were used as research objects. Determination of resistance to hardening under the influence of heat and air was performed by the RTFOT method. Samples of oxidized bitumen with the addition of petroleum polymer resins with hydroxyl functional groups and heavy pyrolysis resin were found to have the best resistance, while for residual bitumen the highest resistance was observed with the introduction of heavy pyrolysis resin and sulfur.
{"title":"Investigation of resistance of modified bitumines to technological aging","authors":"M. Donchenko, O. Grynyshyn","doi":"10.23939/ctas2022.01.056","DOIUrl":"https://doi.org/10.23939/ctas2022.01.056","url":null,"abstract":"A comparison of the ability of modifiers of different classes to slow down the aging processes occurring in petroleum bitumen during pavement operation is presented in the article. Oxidized and residual road bitumens were used as research objects. Determination of resistance to hardening under the influence of heat and air was performed by the RTFOT method. Samples of oxidized bitumen with the addition of petroleum polymer resins with hydroxyl functional groups and heavy pyrolysis resin were found to have the best resistance, while for residual bitumen the highest resistance was observed with the introduction of heavy pyrolysis resin and sulfur.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89749582","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 : 2022-06-01DOI: 10.23939/ctas2022.01.075
Y. Semenchuk, N. Stadnytska
The presented work demonstrates the results of the analysis of data from official sources of information on the range of antibacterial agents for the systematize the use of available in the pharmaceutical market of Ukraine. It is established that the total number of drugs of this group is 972 units, the largest subgroup is J01D Other β-lactam antibiotics (384 units); the form of release is dominated by powders of 427 items (43.93 %) and tablets of 347 items (35.69 %); antibacterial drugs account for the largest share of 677 items (69.65 %); among imported drugs, 316 items (32.51 %) are manufactured in India, in 286 items (29.42 %) are manufactured in Ukraine; according to the international non-proprietary name, mono drugs of 825 items (84.88 %) predominate.
{"title":"Analysis of the range of antibacterial agents for systemic application of the pharmaceutical market of Ukraine","authors":"Y. Semenchuk, N. Stadnytska","doi":"10.23939/ctas2022.01.075","DOIUrl":"https://doi.org/10.23939/ctas2022.01.075","url":null,"abstract":"The presented work demonstrates the results of the analysis of data from official sources of information on the range of antibacterial agents for the systematize the use of available in the pharmaceutical market of Ukraine. It is established that the total number of drugs of this group is 972 units, the largest subgroup is J01D Other β-lactam antibiotics (384 units); the form of release is dominated by powders of 427 items (43.93 %) and tablets of 347 items (35.69 %); antibacterial drugs account for the largest share of 677 items (69.65 %); among imported drugs, 316 items (32.51 %) are manufactured in India, in 286 items (29.42 %) are manufactured in Ukraine; according to the international non-proprietary name, mono drugs of 825 items (84.88 %) predominate.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"188 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83459503","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 : 2022-06-01DOI: 10.23939/ctas2022.01.186
А. Kucherenko, Y. Dovha, M. Kuznetsova, V. Moravskyi
The geometric dimensions of the copper shell formed by chemical deposition on a spherical polyethylene granule were calculated. It is shown that the main factor determining the thickness of the formed copper layer is the initial size of the polyethylene granule. The processes of destruction of the copper shell formed on the polyethylene granule during thermal expansion of the polymer are considered. The values of the limit temperatures in which the copper shell still retains its integrity depending on its thickness are calculated.
{"title":"Analysis of processes which occur during the destruction of a copper shell on polyethylene granules","authors":"А. Kucherenko, Y. Dovha, M. Kuznetsova, V. Moravskyi","doi":"10.23939/ctas2022.01.186","DOIUrl":"https://doi.org/10.23939/ctas2022.01.186","url":null,"abstract":"The geometric dimensions of the copper shell formed by chemical deposition on a spherical polyethylene granule were calculated. It is shown that the main factor determining the thickness of the formed copper layer is the initial size of the polyethylene granule. The processes of destruction of the copper shell formed on the polyethylene granule during thermal expansion of the polymer are considered. The values of the limit temperatures in which the copper shell still retains its integrity depending on its thickness are calculated.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76858880","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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