A. Dyachenko, O. Ischenko, S. V. Gaidai, T. Zakharova, A. Yatsymyrskyi, Vladyslav V. Lisnyak
Based on the data of the thermoprogrammed desorption and using mass-spectroscopic analysis of desorbed products and on the kinetic patterns of the methanation process for cobalt–nickel catalysts, we suggested a mechanism for the reaction which passes through forming intermediate formyl compounds: CHO*, HCOH*, and HCOOH*. Because of the high stability of the carbon dioxide molecule, the step of adding the first hydrogen atom is the limiting step. Such a mechanism is in good agreement with the proposed kinetic equations.
{"title":"Kinetic study of carbon dioxide catalytic methanation over cobalt–nickel catalysts","authors":"A. Dyachenko, O. Ischenko, S. V. Gaidai, T. Zakharova, A. Yatsymyrskyi, Vladyslav V. Lisnyak","doi":"10.17721/FUJCV7I1P74-80","DOIUrl":"https://doi.org/10.17721/FUJCV7I1P74-80","url":null,"abstract":"Based on the data of the thermoprogrammed desorption and using mass-spectroscopic analysis of desorbed products and on the kinetic patterns of the methanation process for cobalt–nickel catalysts, we suggested a mechanism for the reaction which passes through forming intermediate formyl compounds: CHO*, HCOH*, and HCOOH*. Because of the high stability of the carbon dioxide molecule, the step of adding the first hydrogen atom is the limiting step. Such a mechanism is in good agreement with the proposed kinetic equations.","PeriodicalId":42056,"journal":{"name":"French-Ukrainian Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2019-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43845720","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}
O. Demchyna, Khrystyna V. Rymsha, M. Zhyhailo, I. Yevchuk, V. Kochubei
The series of membranes were prepared by UV-initiated polymerization of acrylic monomers (acrylonitrile AN, acrylic acid AA and potassium 3-sulfopropylacrylate SPAK) at the presence of photoinitiator (2,2-dimethoxy-2-phenylacetophenone (DMPA)) and cross-linker ethyleneglycole dimethacrylate (EGDMA), and simultaneous sol-gel process in TEOS-based sol-gel system. Characterization of the obtained nanocomposites includes measurements of proton conductivity, thermal behaviuor, water/methanol uptake, free surface energy. The synthesized membranes have high proton conductivity (10-2 Sm/cm) and other properties allowing to consider them as promising candidates for fuel cell application.
{"title":"UV-curable hybrid organic-inorganic membranes for the use as PEM in fuel cell","authors":"O. Demchyna, Khrystyna V. Rymsha, M. Zhyhailo, I. Yevchuk, V. Kochubei","doi":"10.17721/FUJCV7I1P81-89","DOIUrl":"https://doi.org/10.17721/FUJCV7I1P81-89","url":null,"abstract":"The series of membranes were prepared by UV-initiated polymerization of acrylic monomers (acrylonitrile AN, acrylic acid AA and potassium 3-sulfopropylacrylate SPAK) at the presence of photoinitiator (2,2-dimethoxy-2-phenylacetophenone (DMPA)) and cross-linker ethyleneglycole dimethacrylate (EGDMA), and simultaneous sol-gel process in TEOS-based sol-gel system. Characterization of the obtained nanocomposites includes measurements of proton conductivity, thermal behaviuor, water/methanol uptake, free surface energy. The synthesized membranes have high proton conductivity (10-2 Sm/cm) and other properties allowing to consider them as promising candidates for fuel cell application.","PeriodicalId":42056,"journal":{"name":"French-Ukrainian Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2019-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44836725","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}
L. Grishchenko, N. Novychenko, I. Matushko, A. Zaderko, G. G. Tsapyuk, O. Mischanchuk, V. Diyuk, Vladyslav V. Lisnyak
The functionalization of activated carbon (AC) by P-containing groups was conducted, and their thermal desorption was studied. Depending on the used method, the functionalized AC contains 0.5–1.45 mmol/g of acidic groups acting in catalytic 2-propanol dehydration. All catalysts showed 100% conversion of 2-propanol to propylene. The catalytic activity does not change with time under isothermal conditions and during their repeated use in catalysis, for 3 cycles of heating-cooling. In fact, the yield of propylene remains stable; it does not decrease with each cycle. Preliminary oxidation with nitric acid causes a small increase in the catalytic activity.
{"title":"Catalytic efficiency of activated carbon functionalized with phosphorus-containing groups in 2-propanol dehydration","authors":"L. Grishchenko, N. Novychenko, I. Matushko, A. Zaderko, G. G. Tsapyuk, O. Mischanchuk, V. Diyuk, Vladyslav V. Lisnyak","doi":"10.17721/FUJCV7I1P46-56","DOIUrl":"https://doi.org/10.17721/FUJCV7I1P46-56","url":null,"abstract":"The functionalization of activated carbon (AC) by P-containing groups was conducted, and their thermal desorption was studied. Depending on the used method, the functionalized AC contains 0.5–1.45 mmol/g of acidic groups acting in catalytic 2-propanol dehydration. All catalysts showed 100% conversion of 2-propanol to propylene. The catalytic activity does not change with time under isothermal conditions and during their repeated use in catalysis, for 3 cycles of heating-cooling. In fact, the yield of propylene remains stable; it does not decrease with each cycle. Preliminary oxidation with nitric acid causes a small increase in the catalytic activity.","PeriodicalId":42056,"journal":{"name":"French-Ukrainian Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2019-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44196147","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}
In this study, the hydrogen gas producing was investigated at 298 K with zinc coated platinum (Pt-Zn) electrode in 0.1 M NaH2PO4 solution (pH=12.3). Electrolysis, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques were used for the production of hydrogen gas. Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray fluorescence (XRF) were used for the surface analysis of the electrodes. A practical electrocatalytic experiment was designed to examine of hydrogen production by using a Zn plated Pt electrode and the efficiency of the hydrogen gas increased by 66.66% on the surface of the zinc coated platinum electrode.
本研究采用0.1 M NaH2PO4溶液(pH=12.3)，在298 K下用锌包覆铂(Pt-Zn)电极进行制氢实验。采用电解、电化学阻抗谱(EIS)和动电位极化技术制备氢气。采用扫描电镜(SEM)、能量色散x射线分析(EDX)和x射线荧光(XRF)对电极表面进行分析。设计了一种实用的电催化实验，考察了镀锌铂电极的制氢效果，结果表明，镀锌铂电极表面氢气的效率提高了66.66%。
{"title":"Investigation of Hydrogen Production by using Zinc Coated Platinum Electrode in Phosphate Solutions","authors":"M. K. Sangun, G. Kılınççeker","doi":"10.17721/FUJCV7I1P16-24","DOIUrl":"https://doi.org/10.17721/FUJCV7I1P16-24","url":null,"abstract":"In this study, the hydrogen gas producing was investigated at 298 K with zinc coated platinum (Pt-Zn) electrode in 0.1 M NaH2PO4 solution (pH=12.3). Electrolysis, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques were used for the production of hydrogen gas. Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray fluorescence (XRF) were used for the surface analysis of the electrodes. A practical electrocatalytic experiment was designed to examine of hydrogen production by using a Zn plated Pt electrode and the efficiency of the hydrogen gas increased by 66.66% on the surface of the zinc coated platinum electrode.","PeriodicalId":42056,"journal":{"name":"French-Ukrainian Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2019-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45681835","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}
I. Sokolovskaya, N. Maryukhnich, V. Zarytska, Olena Kyrpychenko, Valentina Nechiporenko, O. Pozdnyakova, Natalia Gordiyenko, V. Tsymbal
It has been stated that changes of lipid exchange and increasing of lipid peroxidation are accompanied by the inflammatory process, which show the increase of proatherogenic blood characteristics. In patients with chronic non-specific inflammatory diseases of genitals disorders of phagocytosis mechanisms, increasing of autointoxication and reaction of hypersensitivity of immediate type are revealed after full blood count index. On the basis of analyses results one can conclude that the increase of atherogenic properties of blood plasma in patients with chronic non-specific inflammatory diseases of genitals took place in accordance with vascular endothelium damage. The article is the first to show the effectiveness of complex treatment of different atherosclerotic pathogenesis links by means of correction of proatherogenic lipid fractions and antioxidative complexes.
{"title":"The state of lipid exchange and thrombotic link of hemostasis in patients with chronic non-specific inflammatory diseases of genitals","authors":"I. Sokolovskaya, N. Maryukhnich, V. Zarytska, Olena Kyrpychenko, Valentina Nechiporenko, O. Pozdnyakova, Natalia Gordiyenko, V. Tsymbal","doi":"10.17721/FUJCV7I1P34-45","DOIUrl":"https://doi.org/10.17721/FUJCV7I1P34-45","url":null,"abstract":"It has been stated that changes of lipid exchange and increasing of lipid peroxidation are accompanied by the inflammatory process, which show the increase of proatherogenic blood characteristics. In patients with chronic non-specific inflammatory diseases of genitals disorders of phagocytosis mechanisms, increasing of autointoxication and reaction of hypersensitivity of immediate type are revealed after full blood count index. On the basis of analyses results one can conclude that the increase of atherogenic properties of blood plasma in patients with chronic non-specific inflammatory diseases of genitals took place in accordance with vascular endothelium damage. The article is the first to show the effectiveness of complex treatment of different atherosclerotic pathogenesis links by means of correction of proatherogenic lipid fractions and antioxidative complexes.","PeriodicalId":42056,"journal":{"name":"French-Ukrainian Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2019-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47233529","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}
Lipidic alkynylcarbinols (LACs) have been identified as potential antitumor compounds, and a thorough understanding of their pharmacophoric environment is now required to elucidate their biological mode of action. In the dialkynylcarbinol (DAC) series, a specific study of the pharmacophore potential has been undertaken by focusing on the synthesis of three fluorinated derivatives followed by their biological evaluation. This work highlights the requirement of an electron-rich secondary carbinol center as a key structure for cytotoxicity in HCT116 cells.
{"title":"Fluorinated analogues of lipidic dialkynylcarbinol pharmacophores: synthesis and cytotoxicity in HCT116 cancer cells","authors":"Pauline Rullièrea, François Lizeauxa, Etienne Jolyb, Stéphanie Ballereaua, Hafida Gasparda, Valérie Maravalc, Remi Chauvinc, Yves Génissona","doi":"10.17721/fujcv7i1p1-9","DOIUrl":"https://doi.org/10.17721/fujcv7i1p1-9","url":null,"abstract":"Lipidic alkynylcarbinols (LACs) have been identified as potential antitumor compounds, and a thorough understanding of their pharmacophoric environment is now required to elucidate their biological mode of action. In the dialkynylcarbinol (DAC) series, a specific study of the pharmacophore potential has been undertaken by focusing on the synthesis of three fluorinated derivatives followed by their biological evaluation. This work highlights the requirement of an electron-rich secondary carbinol center as a key structure for cytotoxicity in HCT116 cells.","PeriodicalId":42056,"journal":{"name":"French-Ukrainian Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67433544","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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