Search results for: V. I. Salyanov

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article

Circular Dichroism Spectra of DNA Dispersions and Textures of DNA Phases

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, O. N. Kompanets, more

Optics and Spectroscopy > 2018 > 125 > 6 > 1047-1052

Circular dichroism (CD) spectra of liquid crystalline dispersions formed as a result of phase exclusion of double-stranded DNA molecules from aqueous-salt-poly(ethylene glycol)-containing solutions were studied at room temperature and under heating. Based on the CD spectra, it is possible to distinguish dispersions with cholesteric packing of DNA molecules from those with hexagonal DNA packing. Heating...

article

Erratum to: “DNA sequence-specific ligands: XVI. Series of the DBP(n) fluorescent dimeric bisbenzimidazoles with 1,4-piperazine-containing linkers”

V. S. Koval, A. A. Ivanov, V. I. Salyanov, A. A. Stomakhin, more

Russian Journal of Bioorganic Chemistry > 2017 > 43 > 6 > 690-690

A novel series of the DBP(n) fluorescent symmetric dimeric bisbenzimidazoles in which the bisbenzimidazole fragments were attached to an oligomeric linker with the 1,4-piperazine residue in its center were prepared. The DBP(n) molecules were distinguished by the number of methylene groups n (where n = 1, 2, 3, 4) in the linker. The DBP(n) synthesis was based on a condensation of the monomeric bisbenzimidazole...

article

The re-entrant cholesteric phase of DNA

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, S. V. Semenov, more

Optics and Spectroscopy > 2017 > 123 > 1 > 56-69

The character of packing of double-stranded DNA molecules in particles of liquid-crystal dispersions formed as a result of the phase exclusion of DNA molecules from aqueous salt polyethylene glycol solutions has been estimated by comparing the circular dichroism (CD) spectra of these dispersions recorded at different osmotic pressures and temperatures. It is shown that the first cycle of heating of...

article

Erratum to: “On the possibility of determining anthracycline antibiotics in aqueous solutions using optical analytical system (biosensor)”

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, S. V. Semenov, more

Optics and Spectroscopy > 2017 > 123 > 1 > 181-181

The online version of the original article can be found under http://dx.doi.org/10.1134/S0030400X17020096

article

DNA sequence-specific ligands: XVI. Series of the DBP(n) fluorescent dimeric bisbenzimidazoles with 1,4-piperazine-containing linkers

V. S. Koval, A. A. Ivanov, V. I. Salyanov, A. A. Stomakhin, more

Russian Journal of Bioorganic Chemistry > 2017 > 43 > 2 > 143-149

article

On the possibility of determining anthracycline antibiotics in aqueous solutions using optical analytical system (biosensor)

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, S. V. Semenov, more

Optics and Spectroscopy > 2017 > 122 > 2 > 194-201

We propose a version of the theory describing the circular dichroism spectra of cholesteric liquidcrystal dispersion particles of double-stranded DNA. The basis of the theory is the concept of absorption of electromagnetic waves by large molecular systems. The effect of physical parameters of dispersion particles on their circular dichroism is theoretically determined. It is experimentally demonstrated...

article

Ordering of double-stranded DNA molecules in a cholesteric liquid-crystalline phase and in dispersion particles of this phase

S. G. Skuridin, F. V. Vereshchagin, V. I. Salyanov, D. P. Chulkov, more

Molecular Biology > 2016 > 50 > 5 > 783-790

The current notion of the organization of molecules in a cholesteric phase is fairly well substantiated in the case of low-molecular-weight compounds. However, this question is open to discussion in the case of double-stranded nucleic acids. In this work, an attempt to compare the well-known data on the structure of cholesteric phases formed by double-stranded DNA molecules and the results of experimental...

article

Hexagonal → cholesteric phase transition of DNA molecules in liquid-crystalline dispersion particles

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, E. I. Katz

Doklady Physical Chemistry > 2016 > 467 > 2 > 53-55

To assess the character of packing of double-stranded (ds) DNA molecules in liquid-crystalline dispersion particles formed by phase exclusion of DNA molecules from aqueous salt solutions of poly(ethylene glycol), the circular dichroism spectra of these dispersions at different temperatures have been compared. It has been shown for the first time that heating dispersion particles with the hexagonal...

article

DNA sequence-specific ligands: XV. Synthesis and spectral characteristics of a new series of dimeric bisbenzimidazoles DB(1, 2, 6, 8, 9, 10, 12)

A. A. Ivanov, V. I. Salyanov, A. L. Zhuze

Russian Journal of Bioorganic Chemistry > 2016 > 42 > 2 > 183-190

Seven fluorescent symmetric dimeric bisbenzimidazoles DB(n) capable of occupying up to one turn of the double-stranded B-form DNA have been designed and synthesized with the aim to develop DNAdependent enzyme inhibitors. The DB(n) compounds contain four 2,6-substituted benzimidazole fragments and differ by the length of the oligomethylene linker (n = 1, 2, 6, 8, 9, 10, 12) between the bisbenzimidazole...

article

Temperature-induced changes of the packing of double-stranded linear DNA molecules in particles of liquid-crystalline dispersions

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, E. I. Kats

Biophysics > 2016 > 61 > 3 > 351-360

The circular dichroism spectra of liquid-crystalline dispersions obtained by phase exclusion of linear double-stranded DNA molecules from aqueous saline solutions of polyethylene glycol (120 ≤ C _PEG ≤ 300 mg/mL) have been investigated. The formation of liquid-crystalline dispersions at polyethylene glycol concentrations ranging from 120 to 200 mg/mL was accompanied by the emergence of an...

article

About the spatial organization of double-stranded DNA molecules in the cholesteric liquid-crystalline phase and dispersion particles of this phase

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, V. V. Volkov, more

Biophysics > 2015 > 60 > 5 > 708-721

An attempt to generalize the well-grounded published data on the structure of the cholesteric phase that is formed by double-stranded DNA molecules and the authors’ own data concerning the packaging of these molecules in particles of a cholesteric liquid-crystalline dispersion has been made. Comparison of all of the data revealed a high probability of the existence of both “local” positional order...

article

Superparamagnetic cobalt ferrite nanoparticles “blow up” the spatial ordering of double-stranded DNA molecules

Yu. M. Yevdokimov, A. G. Pershina, V. I. Salyanov, A. A. Magaeva, more

Biophysics > 2015 > 60 > 3 > 341-347

A study was made of the formation of cholesteric liquid-crystalline dispersions (ChLCDs) of double-stranded DNA molecules that were treated with positively charged superparamagnetic cobalt ferrite nanoparticles and the effect the particles exert on DNA liquid-crystalline dispersions (LCDs). When magnetic nanoparticles (MNPs) were bound to linear double-stranded DNA molecules at a high ionic strength...

article

A new nanobiomaterial: particles of liquid-crystalline DNA dispersions with embedded clusters of gold nanoparticles

Yu. M. Yevdokimov, S. G. Skuridin, V. I. Salyanov, V. I. Popenko, more

Nanotechnologies in Russia > 2014 > 9 > 3-4 > 194-202

The effect of gold (Au) nanoparticles with an average size of about 2 nm on double-stranded DNA cholesteric liquid-crystal dispersion (CLCD) particles has been studied. Treatment of DNA CLCD by Au nanoparticles results in two effects: a “disturbance” of the spatial structure of dispersion particles and the induction of the cholesteric → nematic phase transition, as well as the formation of 40.5–53...

article

Structural nucleic acid nanotechnology: Liquid-crystalline approach

Yu. M. Yevdokimov, V. I. Salyanov, E. I. Katz, S. G. Skuridin

Biophysics > 2013 > 58 > 6 > 775-790

The properties of the particles of cholesteric liquid-crystalline dispersions formed by double-stranded DNA molecules obtained as a result of phase exclusion of these molecules from water-salt polymer-containing solutions are briefly described. Physicochemical properties of quasinematic layers of dispersion particles and double-stranded DNA molecules in their content are taken into account in the...

article

Dynamics of penetration of “Rigid” nanostructures of double-stranded DNA complexed with gadolinium into CHO cells

V. I. Popenko, O. G. Leonova, V. I. Salyanov, N. N. Orlova, more

Molecular Biology > 2013 > 47 > 5 > 743-750

Currently, neutron capture therapy is a promising cancer treatment. This method is based on the reaction of thermal neutron capture by some nonradioactive elements (e.g., Gd¹⁵⁷), which results in the sub-sequent emission of electrons and gamma rays. An effective instrument for delivering gadolinium into tumor tissue are “rigid” nanostructures (NSs) based on double-stranded DNA complexes with gadolinium...

article

Structural effects induced by gold nanoparticles in particles of cholesteric liquid-crystalline dispersion of double-stranded nucleic acids

S. G. Skuridin, V. I. Salyanov, V. I. Popenko, E. V. Shtykova, more

Pharmaceutical Chemistry Journal > 2013 > 47 > 2 > 71-79

Gold (Au) nanoparticles of diameter ~2 nm (but not 5 or 15 nm) were capable of incorporating effectively into quasi-nematic layers of particles of cholesteric liquid-crystalline dispersions (CLCD) formed by double-stranded nucleic acids of various families [B-form DNA, A-form poly(I) × poly(C)]. A study of the properties of CLCD particles treated with Au nanoparticles by various physicochemical methods...

article

SAXS-data-based structural modeling of DNA–gadolinium complexes fixed in particles of cholesteric liquid-crystalline dispersions

E. V. Shtykova, V. V. Volkov, V. I. Salyanov, Yu. M. Yevdokimov

European Biophysics Journal > 2010 > 39 > 9 > 1313-1322

Structure of cholesteric liquid-crystalline dispersions (CLCDs) formed by double-stranded DNA molecules and treated with gadolinium salts was studied by small-angle X-ray scattering (SAXS). The obtained SAXS data open the way for structural modeling of these complexes to obtain a reasonable explanation for the correlated decrease in amplitude of an abnormal negative band in the circular dichroism...

article

Liquid Crystal Dispersions of DNA Complexes with Gadolinium As a Possible Basis for Neutron-Trapping Therapy

Yu. M. Yevdokimov, V. I. Salyanov, O. V. Kondrashina, M. A. Lagutina, more

Doklady Biochemistry and Biophysics > 2005 > 402 > 1-6 > 240-242

article

Molecular Constructions (Superstructures) with Adjustable Properties Based on Double-Stranded Nucleic Acids

Yu. M. Yevdokimov, V. I. Salyanov, Yu. D. Nechipurenko, S. G. Skuridin, more

Molecular Biology > 2003 > 37 > 2 > 293-306

We describe formation of a molecular construction that consists of double-stranded molecules of nucleic acids (or synthetic polynucleotides) located at a distance of 30–50 Å in the spatial structure of particles of their cholesteric liquid-crystalline dispersion and crosslinked by polymeric chelate bridges. The resulting superstructure, which possesses peculiar physicochemical properties, can be used...

article

Formation of Liquid-Crystalline Dispersions of Double-Stranded DNA–Chitosan Complexes

Yu. M. Yevdokimov, V. I. Salyanov, S. V. Semenov, A. V. Il'ina, more

Molecular Biology > 2002 > 36 > 3 > 419-428

Right-handed helical double-stranded DNA molecules were shown to interact with chitosans to form under certain conditions (chitosan molecular weight, content of amino groups, distance between amino groups, ionic strength and pH of solution) cholesteric liquid-crystalline dispersions characterized by abnormal positive band in CD spectrum in the absorption region of DNA nitrogen bases. Conditions were...

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Search results for: V. I. Salyanov

Circular Dichroism Spectra of DNA Dispersions and Textures of DNA Phases

Erratum to: “DNA sequence-specific ligands: XVI. Series of the DBP(n) fluorescent dimeric bisbenzimidazoles with 1,4-piperazine-containing linkers”

The re-entrant cholesteric phase of DNA

Erratum to: “On the possibility of determining anthracycline antibiotics in aqueous solutions using optical analytical system (biosensor)”

DNA sequence-specific ligands: XVI. Series of the DBP(n) fluorescent dimeric bisbenzimidazoles with 1,4-piperazine-containing linkers

On the possibility of determining anthracycline antibiotics in aqueous solutions using optical analytical system (biosensor)

Ordering of double-stranded DNA molecules in a cholesteric liquid-crystalline phase and in dispersion particles of this phase

Hexagonal → cholesteric phase transition of DNA molecules in liquid-crystalline dispersion particles

DNA sequence-specific ligands: XV. Synthesis and spectral characteristics of a new series of dimeric bisbenzimidazoles DB(1, 2, 6, 8, 9, 10, 12)

Temperature-induced changes of the packing of double-stranded linear DNA molecules in particles of liquid-crystalline dispersions

About the spatial organization of double-stranded DNA molecules in the cholesteric liquid-crystalline phase and dispersion particles of this phase

Superparamagnetic cobalt ferrite nanoparticles “blow up” the spatial ordering of double-stranded DNA molecules

A new nanobiomaterial: particles of liquid-crystalline DNA dispersions with embedded clusters of gold nanoparticles

Structural nucleic acid nanotechnology: Liquid-crystalline approach

Dynamics of penetration of “Rigid” nanostructures of double-stranded DNA complexed with gadolinium into CHO cells

Structural effects induced by gold nanoparticles in particles of cholesteric liquid-crystalline dispersion of double-stranded nucleic acids

SAXS-data-based structural modeling of DNA–gadolinium complexes fixed in particles of cholesteric liquid-crystalline dispersions

Liquid Crystal Dispersions of DNA Complexes with Gadolinium As a Possible Basis for Neutron-Trapping Therapy

Molecular Constructions (Superstructures) with Adjustable Properties Based on Double-Stranded Nucleic Acids

Formation of Liquid-Crystalline Dispersions of Double-Stranded DNA–Chitosan Complexes

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