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Bardik V.,Taras Shevchenko National University | Gotsulskii V.,Odessa I I Mechnikov National University | Pavlov E.,Aston University | Malomuzh N.,Odessa I I Mechnikov National University | And 3 more authors.
Journal of Molecular Liquids | Year: 2012

Protein functional motions are ultimately connected to water dynamics. The goal of this study is to link the conformational dynamics of albumin to a dynamic transition taking place at ∼ 42°C in water. We report the results of dynamic light scattering measurements of albumin aqueous solution in the temperature interval 20-65°C. The processing of the experimental data produced the temperature dependence of the macromolecular hydrodynamic radius. We demonstrate that the growth of the macromolecular size in this temperature range can be divided into two stages that are connected to the dynamical properties of water. © 2012 Elsevier B.V. All rights reserved.


Kozytskiy A.V.,Ukrainian Academy of Sciences | Stroyuk A.L.,Ukrainian Academy of Sciences | Kuchmy S.Y.,Ukrainian Academy of Sciences | Streltsov E.A.,Belarusian State University | And 2 more authors.
Theoretical and Experimental Chemistry | Year: 2013

A study was carried out on the photoelectric properties of ITO/TiO2/CdS and ITO/ZnO/CdS nanostructurized films obtained by the SILAR method and the photocatalytic reduction of sulfur by ethanol in the presence of Cd(II) salts. The nanostructures obtained by the latter method display much higher photocurrent density (by a factor of 2 in the case of systems derived from ZnO and a factor of 5 in systems derived from TiO2) upon irradiation with white light (λ > 400 nm) in aqueous solutions of sodium sulfide than the heterostructures obtained by the traditional SILAR method. © 2013 Springer Science+Business Media New York.


Azhniuk Y.M.,Ukrainian Academy of Sciences | Gomonnai A.V.,Ukrainian Academy of Sciences | Lopushansky V.V.,Ukrainian Academy of Sciences | Megela I.G.,Ukrainian Academy of Sciences | And 5 more authors.
Optical Materials | Year: 2013

Optical absorption spectra of 7 MeV electron irradiated borosilicate glasses doped with CdS1-xSex, CdSe 1-xTex, and Cd1-yZn yS semiconductor nanocrystals were investigated. The observed transformation of the confinement-related features in the spectra is related to irradiation-induced negative ionization of the nanocrystals with charge transfer across the nanocrystal/matrix interface. The dependence of the radiation-induced changes on the nanocrystal size and composition is discussed. © 2013 Elsevier B.V. All rights reserved.


Kurmach M.M.,Ukrainian Academy of Sciences | Yaremov P.S.,Ukrainian Academy of Sciences | Tsyrina V.V.,Ukrainian Academy of Sciences | Skoryk M.O.,NanoMedTech | And 2 more authors.
Theoretical and Experimental Chemistry | Year: 2015

The type and morphology of titanosilicate hierarchical zeolites are a function of the structure of polyammonium surfactants used as structure-directing agents (SDA) and the composition of the reaction mixture. Depending on the SDA structure, nanoneedles or nanoparticles of these MTW zeolites aggregate to give nanosponges with external surface up to 200 m2/g and mesopore volume up to 0.4 cm3/g. All these titanosilicate materials have two types of Lewis moderate-strength acid sites with total concentration up to 30 μmol/g. © 2015 Springer Science+Business Media New York


Kozytskiy A.V.,Ukrainian Academy of Sciences | Stroyuk A.L.,Ukrainian Academy of Sciences | Kuchmy S.Y.,Ukrainian Academy of Sciences | Skorik N.A.,NanoMedTech | Moskalyuk V.O.,NanoMedTech
Theoretical and Experimental Chemistry | Year: 2012

Electrodeposition was used to obtain ZnO films on indium tin oxide (ITO) consisting of microplates with diameter 0.5-2.0 μm and thickness 50-300 nm, which, in turn, consist of two particle fractions: relatively large particles with diameter 20-40 nm and fine particles with diameter of about 5 nm. It was found that the fine particles permit these ZnO films to undergo photoinduced charging. This property of ZnO films markedly affects the kinetics of the photocatalytic reduction of NaAuCl4 by ethanol. © 2012 Springer Science+Business Media New York.

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