Pub Date : 2023-06-01DOI: 10.23939/ctas2023.01.144
T. V. Humenetskyi, L. Bilyi, N. Chopyk, A. Boshchuk
The influence of surface-modified titanium dioxide on the electrochemical features of epoxy compositions was researched. The raise of epoxy primer protective properties by the presence of surface-modified fillers in its composition was determined. It is shown that the mechanism of the modified filler protective effect in epoxy coating applied on the steel is similar to the effect of solid zinc phosphate which effectiveness corresponds to the level of the known inhibitory pigment.
{"title":"Аnti-corrosion coatings based on modified epoxy compositions","authors":"T. V. Humenetskyi, L. Bilyi, N. Chopyk, A. Boshchuk","doi":"10.23939/ctas2023.01.144","DOIUrl":"https://doi.org/10.23939/ctas2023.01.144","url":null,"abstract":"The influence of surface-modified titanium dioxide on the electrochemical features of epoxy compositions was researched. The raise of epoxy primer protective properties by the presence of surface-modified fillers in its composition was determined. It is shown that the mechanism of the modified filler protective effect in epoxy coating applied on the steel is similar to the effect of solid zinc phosphate which effectiveness corresponds to the level of the known inhibitory pigment.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76374126","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 : 2023-06-01DOI: 10.23939/ctas2023.01.027
S. О. Hrynyshyn, Z. Znak, К. О. Hrynyshyn, V. Y. Skorohoda
The paper describes the results of studying the composition and properties of pyrocarbon obtained during the pyrolysis of rubber waste. The ability of pyrocarbon to absorb oil and oil products was determined using four developed methods. It has been established that pyrocarbon can find practical use as an adsorbent for the collection and localization of spills of oil and oil products on solid and water surfaces.
{"title":"Use of pyrocarbon obtained in the process of pyrolysis of rubber waste for absorption of oil and Petroleum products","authors":"S. О. Hrynyshyn, Z. Znak, К. О. Hrynyshyn, V. Y. Skorohoda","doi":"10.23939/ctas2023.01.027","DOIUrl":"https://doi.org/10.23939/ctas2023.01.027","url":null,"abstract":"The paper describes the results of studying the composition and properties of pyrocarbon obtained during the pyrolysis of rubber waste. The ability of pyrocarbon to absorb oil and oil products was determined using four developed methods. It has been established that pyrocarbon can find practical use as an adsorbent for the collection and localization of spills of oil and oil products on solid and water surfaces.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85575144","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 : 2023-06-01DOI: 10.23939/ctas2023.01.118
M. O. Psiuk, Z. Hnativ, T. Kuzminchuk, A. R. Denysiuk
The experimental results of the hydrodynamics of filtration of the thermal agent in a stationary layer of granular chalk are given. As a result of the conducted experiments, new calculation dependencies were obtained for determining the hydraulic resistance of a layer of granular chalk depending on the filtering speed of the heat agent and the height of the material layer. Calculation dependencies for determining the coefficient of hydraulic friction were also proposed and its dependence on the Reynolds number was established. This will make it possible to determine pressure losses in the material layer during equipment design and the economic feasibility of modernizing production processes.
{"title":"Нydrodynamics of filtration of heating agent through stationery layer of beet pulp","authors":"M. O. Psiuk, Z. Hnativ, T. Kuzminchuk, A. R. Denysiuk","doi":"10.23939/ctas2023.01.118","DOIUrl":"https://doi.org/10.23939/ctas2023.01.118","url":null,"abstract":"The experimental results of the hydrodynamics of filtration of the thermal agent in a stationary layer of granular chalk are given. As a result of the conducted experiments, new calculation dependencies were obtained for determining the hydraulic resistance of a layer of granular chalk depending on the filtering speed of the heat agent and the height of the material layer. Calculation dependencies for determining the coefficient of hydraulic friction were also proposed and its dependence on the Reynolds number was established. This will make it possible to determine pressure losses in the material layer during equipment design and the economic feasibility of modernizing production processes.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85244779","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 : 2022-12-01DOI: 10.23939/ctas2022.02.100
N. Stadnytska, N. Monka, S. Vasylyuk, H. M. Shyian, V. Lubenets
Alcohol-water extracts of Genistella sagittalis have obtained by ultrasonic extraction method for different times extraction. The obtained extracts have been tested for the quantitative content of extractive substances, phenolic compounds and flavonoids and for the presence antioxidant activity. The best studied indicators were found in extract obtained by ultrasound extraction for 40 minutes (content of extractive substances 25 mg/ml, sum of polyphenolic compounds 30 mg/ml, flavonoids content 45 mg/ml).
{"title":"INVESTIGATION OF ALCOHOL-WATER EXTRACTS OF GENISTELLA SAGITTALIS OBTAINED BY ULTRASONIC EXTRACTION","authors":"N. Stadnytska, N. Monka, S. Vasylyuk, H. M. Shyian, V. Lubenets","doi":"10.23939/ctas2022.02.100","DOIUrl":"https://doi.org/10.23939/ctas2022.02.100","url":null,"abstract":"Alcohol-water extracts of Genistella sagittalis have obtained by ultrasonic extraction method for different times extraction. The obtained extracts have been tested for the quantitative content of extractive substances, phenolic compounds and flavonoids and for the presence antioxidant activity. The best studied indicators were found in extract obtained by ultrasound extraction for 40 minutes (content of extractive substances 25 mg/ml, sum of polyphenolic compounds 30 mg/ml, flavonoids content 45 mg/ml).","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73078108","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 : 2022-12-01DOI: 10.23939/ctas2022.02.178
І. Dron, N. Bukartyk, M. Bukartyk, D. Ostapiv, V. Samaryk
Using natural polysaccharides, pectin and sodium alginate, hydrogel plates capable of absorbing exudate were obtained. Studies have shown no cytotoxicity of the plate material. In order to create bactericidal therapeutic dressings based on them, the possibility of filling the plates with antiseptics (iodine, betadine, chlorhexidine) was shown and their release dynamics was studied. Studies have shown that the release of iodine from the plate is too fast and can not meet the condition of its prolonged release in contrast to betadine and chlorhexidine.
{"title":"PREPARATION OF ANTISEPTIC HYDROGEL PLATES BASED ON NATURAL POLYSACCHARIDES","authors":"І. Dron, N. Bukartyk, M. Bukartyk, D. Ostapiv, V. Samaryk","doi":"10.23939/ctas2022.02.178","DOIUrl":"https://doi.org/10.23939/ctas2022.02.178","url":null,"abstract":"Using natural polysaccharides, pectin and sodium alginate, hydrogel plates capable of absorbing exudate were obtained. Studies have shown no cytotoxicity of the plate material. In order to create bactericidal therapeutic dressings based on them, the possibility of filling the plates with antiseptics (iodine, betadine, chlorhexidine) was shown and their release dynamics was studied. Studies have shown that the release of iodine from the plate is too fast and can not meet the condition of its prolonged release in contrast to betadine and chlorhexidine.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73104126","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 : 2022-12-01DOI: 10.23939/ctas2022.02.016
L. Oliynyk, О. І. Makota, ,. Z. M. Komarenska, S. I. Gerasimchuk
There is described the influence of polyethylenimine globule structure on complexation with copper (II), nickel (II) and cobalt (II) ions. There are determined the values of the coordination number with the change of the pH of the solution for the complexes of ethylenediamine, diethylenetriamine and polyethylenimine with metal ions. It is investigated that the complexation of these metal ions with low molecular weight amines passes through three stages and with PEI through two stages. It is shown that the content of free nitrogen atoms in PEI, which do not react with metal ions, increases with increasing concentration of PEI in solution. The number of monomer units associated with metal ions depends on the size of the globule of the macromolecule, as well as the reaction process. The complexation reaction in solution is determined by the diffusion of metal ions into the polymer globule. If the reaction takes place in a diffusion field at a low polymer concentration, the rate of complexation is proportional to the concentration of macromolecules and the concentration of metal ions in solution.
{"title":"RESEARCH OF COMPLEX FORMATION OF POLYETHYLENIMINE WITH COPPER (II), NICKEL (II), COBALT (II) IONS.","authors":"L. Oliynyk, О. І. Makota, ,. Z. M. Komarenska, S. I. Gerasimchuk","doi":"10.23939/ctas2022.02.016","DOIUrl":"https://doi.org/10.23939/ctas2022.02.016","url":null,"abstract":"There is described the influence of polyethylenimine globule structure on complexation with copper (II), nickel (II) and cobalt (II) ions. There are determined the values of the coordination number with the change of the pH of the solution for the complexes of ethylenediamine, diethylenetriamine and polyethylenimine with metal ions. It is investigated that the complexation of these metal ions with low molecular weight amines passes through three stages and with PEI through two stages. It is shown that the content of free nitrogen atoms in PEI, which do not react with metal ions, increases with increasing concentration of PEI in solution. The number of monomer units associated with metal ions depends on the size of the globule of the macromolecule, as well as the reaction process. The complexation reaction in solution is determined by the diffusion of metal ions into the polymer globule. If the reaction takes place in a diffusion field at a low polymer concentration, the rate of complexation is proportional to the concentration of macromolecules and the concentration of metal ions in solution.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75705140","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 : 2022-12-01DOI: 10.23939/ctas2022.02.094
V. Karpіuk
The results of research on the development of a complex extract based on medicinal plants of the Ranunculaceae L family, namely: herbs Caltha palustris, Ficaria verna, Ranunculus acris. The qualitative indicators of raw materials are established and the content of extractive substances in complex extracts is determined. According to the results of the study, the quantitative content of phenolic compounds and flavonoids obtained in complex extracts by combining monoextracts of test plants obtained by maceration, the content of phenols and flavonoids in bones was higher than in extracts obtained by maceration of herbal mixtures. The extractant (70 % ethanol) used to obtain extracts with the highest content of phenols and flavonoids was determined.
{"title":"RESEARCH ON THE DEVELOPMENT OF A COMPLEX EXTRACT BASED ON PLANTS OF THE RANUNCULACEAE FAMILY","authors":"V. Karpіuk","doi":"10.23939/ctas2022.02.094","DOIUrl":"https://doi.org/10.23939/ctas2022.02.094","url":null,"abstract":"The results of research on the development of a complex extract based on medicinal plants of the Ranunculaceae L family, namely: herbs Caltha palustris, Ficaria verna, Ranunculus acris. The qualitative indicators of raw materials are established and the content of extractive substances in complex extracts is determined. According to the results of the study, the quantitative content of phenolic compounds and flavonoids obtained in complex extracts by combining monoextracts of test plants obtained by maceration, the content of phenols and flavonoids in bones was higher than in extracts obtained by maceration of herbal mixtures. The extractant (70 % ethanol) used to obtain extracts with the highest content of phenols and flavonoids was determined.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74343606","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 : 2022-12-01DOI: 10.23939/ctas2022.01.191
N. Chopyk, V. Zemke
A comparative analysis of the strength properties of hydrogel composition and implants made of polymethylmethacrylate was conducted. Based on polyvinylpyrrolidone and 2- hydroxyethyl-methacrylate including additives of hydrophobic monomers a composition for making soft lining have been proposed. The adhesion strength (tension) of elastic materials bond by the method of “shear” and “breakaway” was studied. It was determined that adhesive strength values of hydrogel composition are quite high. It makes possible applying the composition as cover layer for the removable dentures basis.
{"title":"STRENGTH PROPERTIES OF ELASTIC DENTAL MATERIALS ON THE BASE OF MODIFIED POLYACRYLATES","authors":"N. Chopyk, V. Zemke","doi":"10.23939/ctas2022.01.191","DOIUrl":"https://doi.org/10.23939/ctas2022.01.191","url":null,"abstract":"A comparative analysis of the strength properties of hydrogel composition and implants made of polymethylmethacrylate was conducted. Based on polyvinylpyrrolidone and 2- hydroxyethyl-methacrylate including additives of hydrophobic monomers a composition for making soft lining have been proposed. The adhesion strength (tension) of elastic materials bond by the method of “shear” and “breakaway” was studied. It was determined that adhesive strength values of hydrogel composition are quite high. It makes possible applying the composition as cover layer for the removable dentures basis.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74881706","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 : 2022-12-01DOI: 10.23939/ctas2022.02.047
А. І. Zahrai, Ya. M. Novitskyi
The efficiency of the process of mechanical activation of hydrated lime in the vibratory activator of the bunker type is considered in the work. This makes it possible to use highly active hydrated lime as a modifying reinforcing additive to cements. Also, the introduction of additives has a positive impact on the economic and environmental effects in the production of mortars and concrete structures. Theoretical and experimental studies of the vibrational regimes of the mixture and their influence on the rate and degree of dispersion of hydrated lime have been performed. Parameters of existence of effective modes of vibroactivation are established.
{"title":"STUDY OF THE EFFICIENCY OF THE PROCESS OF VIBROACTIVATION OF HYDRATE LIME","authors":"А. І. Zahrai, Ya. M. Novitskyi","doi":"10.23939/ctas2022.02.047","DOIUrl":"https://doi.org/10.23939/ctas2022.02.047","url":null,"abstract":"The efficiency of the process of mechanical activation of hydrated lime in the vibratory activator of the bunker type is considered in the work. This makes it possible to use highly active hydrated lime as a modifying reinforcing additive to cements. Also, the introduction of additives has a positive impact on the economic and environmental effects in the production of mortars and concrete structures. Theoretical and experimental studies of the vibrational regimes of the mixture and their influence on the rate and degree of dispersion of hydrated lime have been performed. Parameters of existence of effective modes of vibroactivation are established.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80301309","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 : 2022-12-01DOI: 10.23939/ctas2022.02.142
О. Orobchuk, R. Subtelnyi, B. Dzinyak
The regularities of fermentation of yeast wort by thermotolerant strains of microorganisms are studied. For effective fermentation of yeast wort used a culture of thermotolerant yeast Saccharomyces cerevisiae MP-10 and complex lactic acid bacteria in the form of leavens “Kefir”, “Yogurt”, “Symbiotic”, “Bifivit”. The dynamics of changes in dry matter concentration and acidity in different conditions of yeast wort distribution are studied. The optimal content of yeast and lactic acid bacteria is established, namely 4.0 % suspension of yeast and LAB with a yeast content of 80 % of the mass. and lactic acid bacteria 20 % of the mass. It was shown that the drying process can be optimized by using thermotolerant strains of microorganisms and increasing the propagation temperature to 35 °C.
{"title":"FERMENTATION OF KVASS WORT BY THERMOTOLERANT STRAINS OF MICROORGANISMS","authors":"О. Orobchuk, R. Subtelnyi, B. Dzinyak","doi":"10.23939/ctas2022.02.142","DOIUrl":"https://doi.org/10.23939/ctas2022.02.142","url":null,"abstract":"The regularities of fermentation of yeast wort by thermotolerant strains of microorganisms are studied. For effective fermentation of yeast wort used a culture of thermotolerant yeast Saccharomyces cerevisiae MP-10 and complex lactic acid bacteria in the form of leavens “Kefir”, “Yogurt”, “Symbiotic”, “Bifivit”. The dynamics of changes in dry matter concentration and acidity in different conditions of yeast wort distribution are studied. The optimal content of yeast and lactic acid bacteria is established, namely 4.0 % suspension of yeast and LAB with a yeast content of 80 % of the mass. and lactic acid bacteria 20 % of the mass. It was shown that the drying process can be optimized by using thermotolerant strains of microorganisms and increasing the propagation temperature to 35 °C.","PeriodicalId":9808,"journal":{"name":"Chemistry, Technology and Application of Substances","volume":"1287 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91457159","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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