Pub Date : 2022-12-01DOI: 10.46991/pysu:b/2022.56.3.185
Z. Papanyan, L. Gabrielyan
In this work, the conformational and vibrational analysis of dipropyl sulfone in its isolated gaseous state with identification of all stable conformers, their energy and degeneracy, relative population determined by Boltzmann distribution, as well as IR spectra have been performed by density functional theory (DFT) methods. Several DFT methods and basis sets were tested. It was demonstrated that the various local and hybrid DFT functionals such as well-known B3LYP, regardless of the size of basis sets, completely fail in the prediction of correct molecular structures, let alone the IR spectra. It was found that only long-range corrected hybrid density functionals, combined with decently sized basis sets are capable to predict correct values of dihedral angles between non-bonded atomic groups: the most important coordinates in conformational analysis. Thus, wB97XD/6-311++G(2df,2pd) method/basis set combination appears to be the best method for the titled system both in terms of geometry and IR spectra prediction. A detailed analysis of the potential energy surface revealed the existence of 28 distinct conformers with various populations at 298 K, which have significant impact in the simulated IR spectra. The linear scaling equation (LSE) fitting methodology was successfully adopted for the calibration of wavenumbers and achievement of the best match between theoretical and experimental absorption regions of functional groups in sulfones. Moreover, in the construction of the simulated IR spectra, the Lorentzian broadening of each calculated mode with different full widths at half maximum was considered to obtain extinction coefficients, thus more realistic ε(ν) dependency, that is directly comparable with experimental spectra. The authenticity of the results obtained have been verified by comparison with existing experimental literature data on sulfones.
{"title":"PREDICTION OF DIPROPYL SULFONE PROPERTIES BY DENSITY FUNCTIONAL THEORY METHODS: CONFORMATIONAL ANALYSIS AND SIMULATED IR SPECTRUM","authors":"Z. Papanyan, L. Gabrielyan","doi":"10.46991/pysu:b/2022.56.3.185","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.3.185","url":null,"abstract":"In this work, the conformational and vibrational analysis of dipropyl sulfone in its isolated gaseous state with identification of all stable conformers, their energy and degeneracy, relative population determined by Boltzmann distribution, as well as IR spectra have been performed by density functional theory (DFT) methods. Several DFT methods and basis sets were tested. It was demonstrated that the various local and hybrid DFT functionals such as well-known B3LYP, regardless of the size of basis sets, completely fail in the prediction of correct molecular structures, let alone the IR spectra. It was found that only long-range corrected hybrid density functionals, combined with decently sized basis sets are capable to predict correct values of dihedral angles between non-bonded atomic groups: the most important coordinates in conformational analysis. Thus, wB97XD/6-311++G(2df,2pd) method/basis set combination appears to be the best method for the titled system both in terms of geometry and IR spectra prediction. A detailed analysis of the potential energy surface revealed the existence of 28 distinct conformers with various populations at 298 K, which have significant impact in the simulated IR spectra. The linear scaling equation (LSE) fitting methodology was successfully adopted for the calibration of wavenumbers and achievement of the best match between theoretical and experimental absorption regions of functional groups in sulfones. Moreover, in the construction of the simulated IR spectra, the Lorentzian broadening of each calculated mode with different full widths at half maximum was considered to obtain extinction coefficients, thus more realistic ε(ν) dependency, that is directly comparable with experimental spectra. The authenticity of the results obtained have been verified by comparison with existing experimental literature data on sulfones.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84878956","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 : 2022-11-28DOI: 10.46991/pysu:b/2022.56.3.203
A. S. Dadayan, A. S. Poghosyan, S. Ghazaryan, Ella V. Minasyan, A. Hovhannisyan, S. A. Dadayan
The work is devoted to a comparative study of the fatty acid composition of white and black sesame oils, as well as the development of a relatively effective method for isolating the natural antioxidant sesamol. The purpose of this work was to determine the comparative indicators of the content of fatty and free organic acids in the studied oils by gas and high-performance liquid chromatography, confirm their suitability and further use. The optimal conditions for obtaining high-quality unrefined oil from sesame seeds for the food and pharmaceutical industries were determined by the method of cold pressing (pressing chamber temperature was 100℃, oil outlet temperature was ≤ 40℃). Under these conditions, the oil yield was 30% and 27%, respectively. It was shown that finished sesame seed oils contain a highly effective natural antioxidant sesamol (oxyhydroquinone methyl ester) – 0.140 mg/kg, due to which they can be stored at room conditions for more than 3 years. The extracts of squeezes of sesame oils contain valuable free organic acids: oxalic – 0.017 mg/mL, malic – 0.02 mg/mL, fumaric – 0.001 mg/mL. Based on the research, the fatty acid composition of oils was determined and a relatively effective method for the complex processing of sesame raw materials was developed to obtain a highly effective natural antioxidant sesamol.
{"title":"COMPARATIVE STUDY OF FATTY ACID COMPOSITION OF WHITE AND BLACK SESAME OILS AND DEVELOPMENT OF A RELATIVELY EFFICIENT METHOD FOR ISOLATING THE NATURAL ANTIOXIDANT SESAMOL","authors":"A. S. Dadayan, A. S. Poghosyan, S. Ghazaryan, Ella V. Minasyan, A. Hovhannisyan, S. A. Dadayan","doi":"10.46991/pysu:b/2022.56.3.203","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.3.203","url":null,"abstract":"The work is devoted to a comparative study of the fatty acid composition of white and black sesame oils, as well as the development of a relatively effective method for isolating the natural antioxidant sesamol. The purpose of this work was to determine the comparative indicators of the content of fatty and free organic acids in the studied oils by gas and high-performance liquid chromatography, confirm their suitability and further use. The optimal conditions for obtaining high-quality unrefined oil from sesame seeds for the food and pharmaceutical industries were determined by the method of cold pressing (pressing chamber temperature was 100℃, oil outlet temperature was ≤ 40℃). Under these conditions, the oil yield was 30% and 27%, respectively. It was shown that finished sesame seed oils contain a highly effective natural antioxidant sesamol (oxyhydroquinone methyl ester) – 0.140 mg/kg, due to which they can be stored at room conditions for more than 3 years. The extracts of squeezes of sesame oils contain valuable free organic acids: oxalic – 0.017 mg/mL, malic – 0.02 mg/mL, fumaric – 0.001 mg/mL. Based on the research, the fatty acid composition of oils was determined and a relatively effective method for the complex processing of sesame raw materials was developed to obtain a highly effective natural antioxidant sesamol.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91236985","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 : 2022-08-28DOI: 10.46991/pysu:b/2022.56.2.175
Ruzanna G. Adamyan, A. Ghukasyan, Astghik V. Poghosyan
In connection with taxonomic study of representatives of the Geraniaceae family of Armenian flora. Usually during the species identification the structure of the root system, life form, leaf morphology, flower structure, inflorescence, carpels structure are taken into account. The karyological research of the genus Geranium growing in Armenian flora has revealed the following: for 8 species we discovered diploid and tetraployid cytoraces. The basic chromosome numbers х = 9, 10, 13, 14 shows up in the genus Geranium.
{"title":"MORPHOLOGICAL AND KARYOLOGICAL STUDY OF THE SPECIES OF THE FAMILY $GERANIACEAE$ JUSS. OF ARMENIAN FLORA","authors":"Ruzanna G. Adamyan, A. Ghukasyan, Astghik V. Poghosyan","doi":"10.46991/pysu:b/2022.56.2.175","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.175","url":null,"abstract":"In connection with taxonomic study of representatives of the Geraniaceae family of Armenian flora. Usually during the species identification the structure of the root system, life form, leaf morphology, flower structure, inflorescence, carpels structure are taken into account. The karyological research of the genus Geranium growing in Armenian flora has revealed the following: for 8 species we discovered diploid and tetraployid cytoraces. The basic chromosome numbers х = 9, 10, 13, 14 shows up in the genus Geranium.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85525633","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 : 2022-08-28DOI: 10.46991/pysu:b/2022.56.2.161
Anush M. Babayan, M. Petrosyan, N. Sahakyan
Plants are valuable sources of antioxidants, which could have beneficial effect on human health. In this respect flavonoids and other polyphenolic compounds have gained the greatest attention. The present study was undertaken to evaluate the in vitro antiradical activity of different extracts (ethanol, hexane, acetone, chlorophorm and methanol) of Artemisia vulgaris L., A. fragrans Willd., A. absinthium L. and A. splendens Willd., represented in Armenian flora. 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay was used to measure the radical scavenging activity of extracts obtained from Artemisia species. A. fragrans methanol and chlorophorm extracts possess the highest antiradical activity with IC50 value of 87 µg/mL and 98 µg/mL, respectively. The total flavonoid content in plant extracts was determined employing AlCl3 colorimetric assay. The content of total flavonoid compounds of A. fragrans methanol extract was 15.3±0.3 μg QE/mg. The Folin–Ciocalteu assay was used to determine the total phenolic content of studied extracts. The contents of total phenolic compounds of A. fragrans chlorophorm and methanol extracts were 55.9±1.7 μg and 87.3±1.8 μg of GAE/mg, respectively. In the other cases this parameter value was lower than 40 μg of GAE/mg indicated.
{"title":"THE CHEMICAL COMPOSITION AND ANTIOXIDANT PROPERTIES OF SOME SPECIES OF $ARTEMISIA$ GENUS, REPRESENTED IN ARMENIAN FLORA","authors":"Anush M. Babayan, M. Petrosyan, N. Sahakyan","doi":"10.46991/pysu:b/2022.56.2.161","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.161","url":null,"abstract":"Plants are valuable sources of antioxidants, which could have beneficial effect on human health. In this respect flavonoids and other polyphenolic compounds have gained the greatest attention. The present study was undertaken to evaluate the in vitro antiradical activity of different extracts (ethanol, hexane, acetone, chlorophorm and methanol) of Artemisia vulgaris L., A. fragrans Willd., A. absinthium L. and A. splendens Willd., represented in Armenian flora. 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay was used to measure the radical scavenging activity of extracts obtained from Artemisia species. A. fragrans methanol and chlorophorm extracts possess the highest antiradical activity with IC50 value of 87 µg/mL and 98 µg/mL, respectively. The total flavonoid content in plant extracts was determined employing AlCl3 colorimetric assay. The content of total flavonoid compounds of A. fragrans methanol extract was 15.3±0.3 μg QE/mg. The Folin–Ciocalteu assay was used to determine the total phenolic content of studied extracts. The contents of total phenolic compounds of A. fragrans chlorophorm and methanol extracts were 55.9±1.7 μg and 87.3±1.8 μg of GAE/mg, respectively. In the other cases this parameter value was lower than 40 μg of GAE/mg indicated.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86044295","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 : 2022-08-28DOI: 10.46991/pysu:b/2022.56.2.151
S. Marutyan, Gayane A. Petrosyan, Anna R. Muradyan, Lilit A. Marutyan, S. Marutyan, N. Avtandilyan
A preliminary evaluation of ATPase was performed in an experimental model of breast cancer. Total and mitochondrial ATPase activities were studied in the breast and liver of rats with DMBA-induced breast cancer. It has been shown that during the development of breast cancer in these tissues there is a significant increase in ATPase activity. At the same time, an increase in ATPase activity is seen in the liver of rats. In the case of treatment cancer rats with H.alpestre, there are almost no changes in ATPase activity in rats' liver homogenate and mitochondria compared to cancer animals. In the case of combined treatment with chemical inhibitors and H.alpestre, ATPase activity is significantly reduced with the use of L-NAME, the values obtained are lower even compared to healthy animals. However, with the use of nor-NOHA, a further increase in ATPase activity is observed. The obtained results will allow evaluation of the effectiveness of the therapeutic model by changing the energy balance, and selecting furthermore effective doses, to clarify the mechanisms of influence of these combination models.
{"title":"ALTERATION OF TOTAL AND MITOCHONDRIAL ATPASE ACTIVITY IN THE BREAST AND LIVER IN BREAST CANCER-INDUCED RATS","authors":"S. Marutyan, Gayane A. Petrosyan, Anna R. Muradyan, Lilit A. Marutyan, S. Marutyan, N. Avtandilyan","doi":"10.46991/pysu:b/2022.56.2.151","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.151","url":null,"abstract":"A preliminary evaluation of ATPase was performed in an experimental model of breast cancer. Total and mitochondrial ATPase activities were studied in the breast and liver of rats with DMBA-induced breast cancer. It has been shown that during the development of breast cancer in these tissues there is a significant increase in ATPase activity. At the same time, an increase in ATPase activity is seen in the liver of rats. In the case of treatment cancer rats with H.alpestre, there are almost no changes in ATPase activity in rats' liver homogenate and mitochondria compared to cancer animals. In the case of combined treatment with chemical inhibitors and H.alpestre, ATPase activity is significantly reduced with the use of L-NAME, the values obtained are lower even compared to healthy animals. However, with the use of nor-NOHA, a further increase in ATPase activity is observed. The obtained results will allow evaluation of the effectiveness of the therapeutic model by changing the energy balance, and selecting furthermore effective doses, to clarify the mechanisms of influence of these combination models.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85662610","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 : 2022-08-28DOI: 10.46991/pysu:b/2022.56.2.136
M. Shahinyan, M. Mikaelyan, M. Parsadanyan, A. Antonyan
In the present work the interaction of methyl violet (MV) with human serum albumin (HSA) and bovine serum albumin (BSA) has been studied by the UV-denaturation method and the obtained data were compared. The denaturation parameters – denaturation temperature and denaturation interval width, were determined. It was shown that MV, binding to serum albumins, stabilizes their structure. At the same time, the stabilization degree is different. It was also shown that BSA is stabilized more, than HSA, while binding to MV.
{"title":"COMPARISON OF METHYL VIOLET INTERACTION WITH BOVINE SERUM ALBUMIN AND HUMAN SERUM ALBUMIN BY UV-DENATURATION METHOD","authors":"M. Shahinyan, M. Mikaelyan, M. Parsadanyan, A. Antonyan","doi":"10.46991/pysu:b/2022.56.2.136","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.136","url":null,"abstract":"In the present work the interaction of methyl violet (MV) with human serum albumin (HSA) and bovine serum albumin (BSA) has been studied by the UV-denaturation method and the obtained data were compared. The denaturation parameters – denaturation temperature and denaturation interval width, were determined. It was shown that MV, binding to serum albumins, stabilizes their structure. At the same time, the stabilization degree is different. It was also shown that BSA is stabilized more, than HSA, while binding to MV.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74490641","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 : 2022-08-28DOI: 10.46991/pysu:b/2022.56.2.169
Astghik V. Poghosyan, Inessa M. Eloyan, Ruzanna G. Adamyan, Aida M. Petrosyan, L. Margaryan, S. Nanagulyan
One of the most important problems is to reduce the level of indoor air contamination by micromycete. It is known that houseplants with high phytoncide activity have an antifungal effect. In order to reduce the level of contamination in the air of the office room, $Pelargonium~graveolens$ L'Her. plant and essential oil of Geranium were used. The results of the study showed that the level of air pollution with micromycetes was reduced 3 times when there was a $Pelargonium~graveolens$ plant in the room, and the air contamination is reduced 4 times when there is houseplant combined with Geranium essentiale oil.
{"title":"INFLUENCE OF $PELARGONIUM~GRAVEOLENS$ L'HER. ON THE INDOOR AIR MYCOBIOTA","authors":"Astghik V. Poghosyan, Inessa M. Eloyan, Ruzanna G. Adamyan, Aida M. Petrosyan, L. Margaryan, S. Nanagulyan","doi":"10.46991/pysu:b/2022.56.2.169","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.169","url":null,"abstract":"One of the most important problems is to reduce the level of indoor air contamination by micromycete. It is known that houseplants with high phytoncide activity have an antifungal effect. In order to reduce the level of contamination in the air of the office room, $Pelargonium~graveolens$ L'Her. plant and essential oil of Geranium were used. The results of the study showed that the level of air pollution with micromycetes was reduced 3 times when there was a $Pelargonium~graveolens$ plant in the room, and the air contamination is reduced 4 times when there is houseplant combined with Geranium essentiale oil.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87407102","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 : 2022-06-30DOI: 10.46991/pysu:b/2022.56.2.126
A. Sargsyan, Ani J. Karapetyan, L. Hayriyan, A. Hovhannisyan, M. Melkumyan, G. Oganezova, N. Avetisyan, N. Hovhannisyan
Bacterial collagenolytic proteases have drawn increasing attention due to their essential role in the global nitrogen cycling and their virulent role in some diseases. The inhibition of these enzymes is attractive, as it does not attack the pathogen directly but rather blocks the colonization and infiltration of the host by the clostridia. Optically active non-protein α-amino acids have been screened for their ability to inhibit collagenase of Clostridium histolyticum. Both structure-based drug design approach (modeling) and that of determining enzyme activity in the presence of amino acids have been used to identify low molecular weight inhibitors of collagenase. The compounds able to inhibit collagenase activity have been revealed and IC50 values have been estimated.
{"title":"THE INFLUENCE OF NON-PROTEIN AMINO ACIDS AND PEPTIDES ON BACTERIAL COLLAGENASE","authors":"A. Sargsyan, Ani J. Karapetyan, L. Hayriyan, A. Hovhannisyan, M. Melkumyan, G. Oganezova, N. Avetisyan, N. Hovhannisyan","doi":"10.46991/pysu:b/2022.56.2.126","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.126","url":null,"abstract":"Bacterial collagenolytic proteases have drawn increasing attention due to their essential role in the global nitrogen cycling and their virulent role in some diseases. The inhibition of these enzymes is attractive, as it does not attack the pathogen directly but rather blocks the colonization and infiltration of the host by the clostridia. Optically active non-protein α-amino acids have been screened for their ability to inhibit collagenase of Clostridium histolyticum. Both structure-based drug design approach (modeling) and that of determining enzyme activity in the presence of amino acids have been used to identify low molecular weight inhibitors of collagenase. The compounds able to inhibit collagenase activity have been revealed and IC50 values have been estimated.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88491852","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 : 2022-06-30DOI: 10.46991/pysu:b/2022.56.2.114
A. I. Martiryan, L. Tadevosyan
Continuing previous similar research, the ability of sulfates of elements of the second group – magnesium, calcium and zinc, to produce peroxosolvates, the methods for their preparation, as well as their properties have been studied. It has been shown that these sulfates are able to produce peroxosolvates with different molar ratios: MgSO4‧H2O2, CaSO4‧0.04H2O2, ZnSO4‧0.05H2O2. The authenticity, composition and nature of the obtained peroxosolvates have been elucidated by the methods of X-ray and IR spectroscopy. Quantitative data on the decomposition of hydrogen peroxide in dry peroxosolvates of magnesium and zinc sulfates were calculated.
{"title":"SYNTHESIS AND STUDY OF PEROXOSOLVATES OF SULFATES OF ELEMENTS OF THE SECOND GROUP","authors":"A. I. Martiryan, L. Tadevosyan","doi":"10.46991/pysu:b/2022.56.2.114","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.114","url":null,"abstract":"Continuing previous similar research, the ability of sulfates of elements of the second group – magnesium, calcium and zinc, to produce peroxosolvates, the methods for their preparation, as well as their properties have been studied. It has been shown that these sulfates are able to produce peroxosolvates with different molar ratios: MgSO4‧H2O2, CaSO4‧0.04H2O2, ZnSO4‧0.05H2O2. The authenticity, composition and nature of the obtained peroxosolvates have been elucidated by the methods of X-ray and IR spectroscopy. Quantitative data on the decomposition of hydrogen peroxide in dry peroxosolvates of magnesium and zinc sulfates were calculated.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78526815","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 : 2022-06-30DOI: 10.46991/pysu:b/2022.56.2.108
H. H. Darbinyan, A. Galstyan, H. H. Khachatryan
The interaction of gold (III) with 2-(3-azepan-1-yl)-2-hydroxypropylthioacetic acid has been studied by means of potentiometric titration and amperometric titration methods. It has been shown that the given interaction possesses an oxidation-reduction character with further complex formation. The ratio of interacting substances (oxidizer : reducing agent) is 1:1. A possible scheme of interaction has been also suggested.
{"title":"THE STUDY OF THE INTERACTION BETWEEN GOLD (III) AND 2-(3-AZEPAN-1-YL)-2-HYDROXYPROPYLTHIOACETIC ACID BY MEANS OF POTENTIOMETRIC AND AMPEROMETRIC TITRATION METHODS","authors":"H. H. Darbinyan, A. Galstyan, H. H. Khachatryan","doi":"10.46991/pysu:b/2022.56.2.108","DOIUrl":"https://doi.org/10.46991/pysu:b/2022.56.2.108","url":null,"abstract":"The interaction of gold (III) with 2-(3-azepan-1-yl)-2-hydroxypropylthioacetic acid has been studied by means of potentiometric titration and amperometric titration methods. It has been shown that the given interaction possesses an oxidation-reduction character with further complex formation. The ratio of interacting substances (oxidizer : reducing agent) is 1:1. A possible scheme of interaction has been also suggested.","PeriodicalId":20692,"journal":{"name":"Proceedings of the YSU B: Chemical and Biological Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75945559","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：