Search Results - "Samijlenko, S P"

To what extent can methyl derivatives be regarded as stabilized tautomers of xanthine? by Platonov, M.O., Samijlenko, S.P., Sudakov, O.O., Kondratyuk, I.V., Hovorun, D.M.

“…Taking xanthine (Xan) as an example, validity of an approach to experimental investigations of nucleotide bases’ tautomeric equilibrium, based on the use of…”
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Evaluation of antibacterial and antiviral activity of N-arylamides of 9-methyl and 9-methoxyphenazine-1-carboxylic acids – inhibitors of the phage T7 model transctiption by Palchykovska, L. G., Vasylchenko, O. V., Platonov, M. O., Kostina, V. G., Babkina, M. M., Tarasov, O. A., Starosyla, D. B., Samijlenko, S. P., Rybalko, S. L., Deriabin, O. M., Hovorun, D. M.

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Antiviral properties of herbal flavonoids – inhibitors of the DNA and RNA synthesis by Palchykovska, L. G., Vasylchenko, O. V., Platonov, M. O., Starosyla, D. B., Porva, J. I., Rymar, S. J., Atamaniuk, V. P., Samijlenko, S. P., Rybalko, S. L.

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Prototropic molecular–zwitterionic tautomerism of xanthine and hypoxanthine by Kondratyuk, I.V., Samijlenko, S.P., Kolomiets’, I.M., Hovorun, D.M.

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Fixation of xanthine prototropic tautomers by methyl group does not practically change their relative energy: a DFT quantum-chemical investigation by Platonov, M. O., Samijlenko, S. P., Hovorun, D. M.

“…The adequacy of determination of tautomeric equilibrium constants for isolated nucleotide bases using their corresponding methyl substituted derivatives has…”
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Proton acceptor and proton donor properties of modified nucleotide bases and their complexing ability: quantum chemical investigation by Potyahaylo, A. L., Stepanyugin, A. V., Samijlenko, S. P., Hovorun, D. M.

“…Proton acceptor and proton donor properties of 40 modified nucleotide bases have been investigated by the AM1 semiempirical quantum chemical method, proven to…”
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Cytosine self-association in anhydrous DMSO through two equivalent H-bonds N1H...O=C2 lowers the barrier of amino group turn: 1H NMR spectroscopy data by Samijlenko, S. P., Kondratyuk, I. V., Potyahaylo, A. L., Hovorun, D. M.

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Infrared absorption spectra of nucleic acids: the attenuated total reflection technique by Stepanyugin, A. V., Martynenko, O. I., Samijlenko, S. P., Hovorun, D. M.

“…For the first time the attenuated total reflection (ATR) technique has been applied to obtain the IR absorption spectra of DNA and RNA. The procedure of…”
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UV spectra of pyrimidine bases and nucleosides in the context of methylsubstitution and interaction with amino acid carboxylic group by Stepanyugin, A. V., Kolomiets', I. M., Potyahaylo, A. L., Samijlenko, S. P., Hovorun, D. M.

“…UV spectra of pyrimidine nucleotide bases, nucleosides, a number of their derivatives and analogues were investigated in anhydrous DMSO. Effects of interaction…”
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Specific interaction of the amino acid model carboxylic group with purine transforms it into its N7H rare tautomeric form: results of vacuum ab initio calculations by Samijlenko, S. P., Bogdan, T. V., Trygubenko, S. A., Hovorun, D. M.

“…According to…”
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Prototropic molecular-zwitterionic tautomerism of xanthine and hypoxanthine: unexpected biological view by Kondratyuk, I. V., Samijlenko, S. P., Kolomiets, I. M., Potyahaylo, A. L., Hovorun, D. M.

“…The prototropic molecular-zwitterionic tautomerism of xanthine and hypoxanthine has been investigated by the semi-empirical quantum-chemical AMI method…”
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Influence of methylalion and interactions with amino acid carboxylic group on UV spectra of purine nucleotide bases and nucleosides in dimethylsulfoxide. 1. Adenine by Stepanyugin, A. V., Kolomiets, I. M., Samijlenko, S. P.

“…UV absorption spectra of adenine, adenosine and a number of their methyl derivatives were studied in DMSO. Essential changes in adenine UV spectra tinder…”
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Influence of methylation and interactions with amino acid carboxylic group on UV spectra of purine nucleotide bases and nucleosides in dimethylsulfoxide. 2. Guanine by Stepanyugin, A. V., Kotomiets, I. M., Potyahaylo, A. L., Samijlenko, S. P.

“…Uy absorption spectra of guanine derivatives m…”
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Structural peculiarities of 6-azacytosine and its derivatives imply intramolecular H-bonds by Samijlenko, S.P, Alexeeva, I.V, Palchykivs’ka, L.H, Kondratyuk, I.V, Stepanyugin, A.V, Shalamay, A.S, Hovorun, D.M

“…The study of 6-azaCyt, 6-azaC, a number of their derivatives and related compounds was performed by PMR and IR spectroscopies. The doublet splitting of amino…”
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Model considerations on physico-chemical nature of protein-nucleic acid contacts through amino acid carboxylic groups: spectroscopic data by Samijlenko, S. P., Kolomiets, I. M., Kondratyuk, I. V., Stepanyugin, A. V.

“…This paper generalizes the results of a series of the works on spectroscopic (IR, UV, NMR, Roman) investigations of complexes of nucleotide bases, their…”
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Influence of methylation and interactions with amino acid carboxylic group on UV spectra of purine bases and nucleosides in dimethylsulfoxide. 3. Hypoxanthine and xanthine by Stepanyugin, A. V., Kolomiets', I. M., Potyahaylo, A. L., Tryhubenko, S. A., Bohdan, T. V., Samijlenko, S. P.

“…UV absorption spectra of hypoxanthine, xanthine, their nucleosides and a number of their methyl derivatives were studied in anhydrous DMSO, and the spectral…”
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Intramolecular CH times times times O Hydrogen Bonds in the AI and BI DNA-like Conformers of Canonical Nucleosides and their Watson-Crick Pairs. Quantum Chemical and AIM Analysis by Yurenko, Y P, Zhurakivsky, RO, Samijlenko, S P, Hovorun, D M

“…The aim of this work is to cast some light on the H-bonds in double-stranded DNA in its AI and BI forms. For this purpose, we have performed the MP2 and DFT…”
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Structural features of 6-azacytidine and its derivatives: data of NMR and IR spectroscopies by Samijlenko, S. P., Alexeeva, I. V., Palchykivs'ka, L. H., Kondratyuk, I. V., Stepanyugin, A. V., Shalamay, A. S., Hovorun, D. M.

“…Study of 6-azaCyt, 6-azaC, a number of their derivatives and related compounds was conducted by IR and NMR spectrocsopies. Doublet splitting of amino group…”
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Transitions to high tautomeric states can be induced in adenine by interactions with carboxylate and sodium ions: DFT calculation data by Samijlenko, Svitlana P., Krechkivska, Olha M., Kosach, Dmytro A., Hovorun, Dmytro M.

“…Twelve triple complexes of nine adenine tautomers with carboxylate ion of acetic acid CH 3COO − and sodium ion Na + of the CH 3COO −:Ade:Na + type were studied…”
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ATR-IR spectroscopy as applied to nucleic acid films by Stepanyugin, Andriy V., Samijlenko, Svitlana P., Martynenko, Olena I., Hovorun, Dmytro M.

“…For the first time the ATR technique was applied to obtain IR absorption spectra of DNA and RNA dry films. There was worked out procedure of the nucleic acid…”
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