S V Stolyar

Publications (9)2.07 Total impact

• Article: Mössbauer investigation of temperature transformations in bacterial ferrihydrite

  S. V. Stolyar, O. A. Bayukov, V. P. Ladygina, R. S. Iskhakov, L. A. Ishchenko, V. Yu. Yakovchuk, K. G. Dobretsov, A. I. Pozdnyakov, O. E. Piksina
  [show abstract] [hide abstract]
  ABSTRACT: Ferrihydrite nanoparticles formed as a result of the microorganism activity have been studied using Mössbauer spectroscopy, X-ray powder diffraction analysis, and X-ray fluorescence analysis. Three positions of trivalent iron with nonoverlapping ranges of quadrupole splittings have been revealed in bacterial ferrihydrite: QS{Fe3+(1)} = 0.49–0.83 mm/s, QS{Fe3+(2)} = 0.84–1.10 mm/s, and QS{Fe3+(3)} = 1.25–1.73 mm/s. It has been experimentally demonstrated that the Fe3+(3) positions are the centers of nucleation of the hematite phase in the course of heat treatment.
  Physics of the Solid State 05/2012; 53(1):100-104. · 0.71 Impact Factor
• Article: A Method for Introduction of Magnetic Nanoparticles into Tissues by Means of Magnetic Field Gradient: An Experimental Study

  K. G. Dobretsov, V. Yu. Afon’kin, A. K. Kirichenko, V. P. Ladygina, S. V. Stolyar, O. A. Bayukov, A. V. Sipkin
  [show abstract] [hide abstract]
  ABSTRACT: Targeted effects of magnetic nanoparticles were studied. Solution with iron-containing nanosubstance was applied to resected nasal bone and cartilage tissues. Magnetic field was generated by a Polus-101 device for low-frequency magnetotherapy, which provided permanent work of one inductor (10.14±19.56 mT). The results indicate that magnetic nanoparticles placed into magnetic field gradient penetrate into the thickness of the cartilage and bone tissues.
  Bulletin of Experimental Biology and Medicine 05/2012; 147(6):750-752. · 0.27 Impact Factor
• Article: Mössbauer study of bacterial ferrihydrite

  S. V. Stolyar, O. A. Bayukov, Yu. L. Gurevich, V. P. Ladygina, R. S. Iskhakov, P. P. Pustoshilov
  [show abstract] [hide abstract]
  ABSTRACT: Mössbauer measurements reveal four inequivalent Fe sites in ferrihydrite produced by Klebsiella oxytoca. The origin of these sites can be understood in terms of two nanosized structural regions in the bacterium and a certain ordering of bilayers and single layers of Fe-occupied octahedra.
  Inorganic Materials 04/2012; 43(6):638-641. · 0.41 Impact Factor
• Article: Mössbauer investigation of iron-producing bacteria Klebsiella oxytoca

  S. V. Stolyar, O. A. Bayukov, Yu. L. Gurevich, R. S. Ishkakov, V. P. Ladygina
  [show abstract] [hide abstract]
  ABSTRACT: The process of ferrihydrite formation in bacteria Klebsiella oxytoca has been investigated as a function of the bacteria cultivation time. The effect of temperature on the ferrihydrite transformations has been studied.
  Bulletin of the Russian Academy of Sciences Physics 04/2012; 71(9):1286-1290.
• Article: Iron-containing nanoparticles from microbial metabolism

  S. V. Stolyar, O. A. Bayukov, Yu. L. Gurevich, E. A. Denisova, R. S. Iskhakov, V. P. Ladygina, A. P. Puzyr’, P. P. Pustoshilov, M. A. Bitekhtina
  [show abstract] [hide abstract]
  ABSTRACT: We have studied the crystal structure and magnetic properties of Fe-containing nanoparticles formed as a result of microbial metabolism. Our experimental data, coupled with earlier results, suggest that the nanoparticles consist of ferrihydrite, Fe2O3 · nH2O, and are in a superparamagnetic state.
  Inorganic Materials 04/2012; 42(7):763-768. · 0.41 Impact Factor
• Article: Magnetic properties and application of biomineral particles produced by bacterial culture

  L. A. Ishchenko, S. V. Stolyar, V. P. Ladygina, Y. L. Raikher, M. Balasoiu, O. A. Bayukov, R. S. Iskhakov, E. V. Inzhevatkin
  [show abstract] [hide abstract]
  ABSTRACT: Ferrihydrite nanoparticles (2-5 nm in size) produced by bacteria culture in the course of biomineralization of iron salt solutions from a natural medium exhibit unique magnetic properties: they are characterized by both the antiferromagnetic order inherent in a bulk ferrihydrite and the spontaneous magnetic moment due to the decompensation of spins in sublattices of a nanoparticle. The magnetic susceptibility enhanced by the superantiferromagnetism effect and the magnetic moment independent of the magnetic field provide the possibility of magnetically controlling these natural objects. This has opened up the possibilities for their use in nanomedicine and bioengineering. The results obtained from measurements of the magnetic properties of the bacterial ferrihydrite in its two main crystalline modifications are reported. This has made it possible to determine numerical values of the magnetic parameters of real biomineral nanoparticles. (C) 2010 Published by Elsevier Ltd
  Physics procedia 01/2011; 9:279-282.
• Article: A method for introduction of magnetic nanoparticles into tissues by means of magnetic field gradient: an experimental study.

  K G Dobretsov, V Yu Afon'kin, A K Kirichenko, V P Ladygina, S V Stolyar, O A Bayukov, A V Sipkin
  [show abstract] [hide abstract]
  ABSTRACT: Targeted effects of magnetic nanoparticles were studied. Solution with iron-containing nanosubstance was applied to resected nasal bone and cartilage tissues. Magnetic field was generated by a Polus-101 device for low-frequency magnetotherapy, which provided permanent work of one inductor (10.14+/-19.56 mT). The results indicate that magnetic nanoparticles placed into magnetic field gradient penetrate into the thickness of the cartilage and bone tissues.
  Bulletin of Experimental Biology and Medicine 06/2009; 147(6):750-2. · 0.27 Impact Factor
• Article: [Experience with the use of magnetic nanoparticles in medicine and prospects for their application in otorhinolaringology].

  K G Dobretsov, V Iu Afon'kin, S V Stoliar, V P Ladygina, A V Sipkin, A S Lopatin
  [show abstract] [hide abstract]
  ABSTRACT: The literature review of the methods for application of magnetic nanoparticles in different fields of medicine is presented. The paper summarizes the 40 year-long experience of Russian and foreign scientists with the use of magnetic suspensions, liquids, and particles with magnetic carriers from 10 to 1000 nm in diameter. Results of recent studies are presented, prospects for the development and application of nanomedical techniques in otorhinolaringology are discussed.
  Vestnik otorinolaringologii 02/2009;
• Source

  Available from: Victor Ivanovich Stepanov

  Article: Magnetic properties of biomineral particles produced by bacteria Klebsiella oxytoca

  Y. L. Raikher, V. I. Stepanov, S. V. Stolyar, V. P. Ladygina, D. A. Balaev, L. A. Ishchenko, M. Balasoiu
  [show abstract] [hide abstract]
  ABSTRACT: Ferrihydrite nanoparticles (2-5 nm in size) produced by bacteria Klebsiella oxytoca in the course of biomineralization of iron salt solutions from a natural medium exhibit unique magnetic properties: they are characterized by both the antiferromagnetic order inherent in a bulk ferrihydrite and the spontaneous magnetic moment due to the decompensation of spins in sublattices of a nanoparticle. The magnetic susceptibility enhanced by the superantiferromagnetism effect and the magnetic moment independent of the magnetic field provide the possibility of magnetically controlling these natural objects. This has opened up the possibilities for their use in nanomedicine and bioengineering. The results obtained from measurements of the magnetic properties of the ferrihydrite produced by Klebsiella oxytoca in its two main crystalline modifications are reported, and the data obtained are analyzed theoretically. This has made it possible to determine numerical values of the magnetic parameters of real biomineral nanoparticles.
  Physics of the Solid State. 52(2):298-305.