Voronezh State University

About: Voronezh State University is a education organization based out in Voronezh, Russia. It is known for research contribution in the topics: Silicon & Boundary value problem. The organization has 5166 authors who have published 6097 publications receiving 31680 citations. The organization is also known as: VSU & Voronezh University.

Characteristics of $p$ -Norm Signal Detection in Gaussian Mixture Noise

Abstract: Performance of the $p$ -norm detector has been analyzed recently in additive white Gaussian noise and several analytical solutions were obtained. We have developed these solutions for the case of non-Gaussian noise. Expressions for the false alarm probability $P_{F}$ and the detection probability $P_{D}$ were found in series-form for an arbitrary index of power $p$ using an analysis based on the moment generating function. Series-form expressions for the average detection probability $\overline {{P_D}} $ in the non-Gaussian environment for Nakagami- $m$ , $k- {\mu} $ , and $\eta - {\mu} $ fading channels were derived as well. Recently proposed $p$ -law selection and $p$ -law combining schemes for antenna diversity reception were analyzed. The detection characteristics of a $p$ -norm detector were compared with a traditional energy detector and with an optimal detector. All analytical results were verified with a statistic simulation.

[Inulinases from various producers: the features of their permolecular organization].

Abstract: The structural organization of inulinases from yeasts, fungi, and plants are researched. For studying their sizes, molecular weight, and permolecular organization, an approach consisting of a combination of atomic force microscopy with methods of dynamic light scattering, gel chromatography, and electrophoresis was used. It is shown that inulinases from Kluyveromyces marxianus and Aspergillus niger form geterodimers and inulinases from tubers of Helianthus tuberosus are present as both dimers and monomers. The role of various forms in the functional activity of inulinase molecules is discussed.

Synthesis of graft copolymers of carboxymethyl cellulose and N,N-dimethylaminoethyl methacrylate and their study as Paclitaxel carriers

Abstract: The double-sensitive graft copolymers of sodium salt of carboxymethyl cellulose (Na-CMC) and N,N-dimethylaminoethyl methacrylate (DMAEMA) with different content are successfully synthesized by radical polymerization applying a redox initiator. Aqueous solution of the synthesized copolymers has a lower critical solution temperature (LCST) in the range of 37–44 °C, and the sizes of copolymer particles being multichain spherical negative-charged aggregates are in a 118–133 nm range. Na-CMC-g-PDMAEMA copolymer particles are stable in a 0.15 N NaCl aqueous solution and in the physiological pH range, which allows to apply them as vectors for targeted drug delivery. Conjugation between Paclitaxel (Ptx) and Na-CMC-g-PDMAEMA copolymer is due to hydrophobic and electrostatic interaction between functional groups of each component; copolymers are characterized by relatively high values of loading and encapsulation efficiencies of Ptx. In vitro release kinetics was also researched in acidic and neutral media at 38 °C. The release process of Ptx from a copolymer conjugate is described by Korsmeyer–Peppas kinetic model and limited by molecular diffusion.

Valence electronic state density in thorium dioxide

Abstract: This work analyses the fine low energy (0-40 eV) X-ray photoelectron spectra of ThO2, taking into account relativistic Xα-discrete variation electronic structure calculations for the ThO8 (D4h) cluster reflecting thorium's close environment in ThO2. As a result, it was theoretically shown and experimentally confirmed that Th5f electrons in ThO2 can participate directly (~0.6 Th5f electrons) in chemical bond formation.Th6p electrons were shown to be a significant part (~0.44 Th6p electrons) not only of inner valence molecular orbitals, but to play a significant role in outer valence molecular orbitals formation, as well. Inner valence molecular orbitals composition and sequent order were established to belong to the binding energy range of 13 eV to 40 eV. The valence electronic state density in the range of 0-40 eV in ThO2 was also calculated. For the first time, these data allowed an interpretation of the fine X-ray photoelectron spectra (0-40 eV) and high resolution O4,5(Th) X-ray emition spectral structure (~60 - ~85 eV) of ThO2.