Перегляд за автором "Medvedev, D.V."

Сортувати за: Порядок: Результатів:

  • Nuclear physics techniques for determination of rocks age 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Fedorets, I.D.; Valter, A.A.; Storishko, V.E. (Вопросы атомной науки и техники, 2004)
    The low background nuclear physics techniques were used for measure age geologic samples of micas (biotite, lepidolite, muscovite, phlogopite) by means of detection a gamma radiation from radioisotopes. The nuclear reactions ...
  • Photonuclear method of production Cu-67 
    Aizatskyi, N.I.; Dikiy, N.P.; Dovbnya, A.N.; Dolzhek, M.A.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V. (Вопросы атомной науки и техники, 2014)
    The efficiently separation of ⁶⁷Cu is achieved by using diantipyrylpropylmethane (DАPPМ). Experimental separation of ⁶⁷Cu from sulphuric solution (1 mol./L) of zinc (2 mol./L) with addition potassium iodide (0.1 mol./L) ...
  • Photonuclear method of production of free ¹⁵³Sm by use of nanoparticles of samarium oxide and clinotilolite 
    Dikiy, N.P.; Dovbnya, A.N.; Krasnoselskiy, N.V.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L. (Вопросы атомной науки и техники, 2016)
    Наночастинки Sm₂O₃ і клиноптилоліту використовувалися для одержання ¹⁵³Sm з високою питомою активністю за допомогою гальмування ядер віддачі з реакції ¹⁵⁴Sm(γ, n)¹⁵³Sm у клиноптилоліті. Після опромі- нення гальмовим ...
  • Photonuclear production of ⁹⁹Mo/ ⁹⁹ᵐТс-generator with using effect Szilard-Chalmers and electrolysis method 
    Dikiy, N.P.; Layshko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L. (Problems of Atomic Science and Technology, 2022)
    The possibility of photonuclear production of ⁹⁹Mo medical radioisotope using recoil nuclei of molybdenite nanoparticles from reaction ¹⁰⁰Mo(γ,n)⁹⁹Mo was investigated. The enrichment of radioactive isotopes is carried out ...
  • Photonuclear production of F-18 
    Dikiy, N.P.; Dovbnya, A.N.; Krasnoselsky, N.V.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Fedorets, I.D. (Вопросы атомной науки и техники, 2018)
    ¹⁸F is one of the most important positron emitters which are routinely used in the positron emission tomography (PET). The recoil nuclei method in the ¹⁹F(Ɣ,n)¹⁸F reaction was used for the production of ¹⁸F free carrier. ...
  • Photonuclear production of Pm-149 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L. (Вопросы атомной науки и техники, 2015)
    ¹⁵³Sm is successfully used for palliative treatment of patients with bone metastases and pain. ¹⁵³Sm is being produced in the reactors by means of irradiating of ¹⁵²Sm. In radio-labelled radiopharmaceuticals per each isotope ...
  • Photonuclear production of Yb-175 
    Dikiy, N.P.; Dovbnya, A.N.; Krasnoselsky, N.V.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Fedorets, I.D. (Вопросы атомной науки и техники, 2017)
    The use of photonuclear nanotechnology makes it possible to obtain the ¹⁷⁵Yb isotope with acceptable characteristics without the content of impurities of other isotopes. Irradiation of Yb₂O₃ nanoparticles of a natural ...
  • Possibilites of isotopes production of ¹⁵³Sm, ¹⁷⁵Yb, ¹⁸⁶Re at the electronic accelerator 
    Dikiy, N.P.; Krasnoselskiy, N.V.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L. (Problems of Atomic Science and Technology, 2023)
    Photonuclear technology for producing osteotropic isotopes ¹⁵³Sm (Т₁/₂ = 1.9 days, Eᵦ = 0.8 MeV, Eᵧ = 103.2 keV), ¹⁷⁵Yb (Т₁/₂ = 4.2 days, Eᵦ = 0.5 MeV, Eᵧ = 396.3 keV) and ¹⁸⁶Re (T₁/₂ = 3.8 days, Eᵦ = 1.1 MeV, Eᵧ = 137.2 ...
  • Radiation stability of natural aluminosilicates various structural types by electrons and gamma quantium 
    Dikiy, N.P.; Bereznyak, O.P.; Lyashko, Yu.V.; Medvedeva, O.P.; Medvedev, D.V. (Problems of Atomic Science and Technology, 2023)
    The analysis of the properties of natural aluminosilicates in the conditions of various physical loadings and thermal factors are carred out. Microcline and clinoptilolite are inorganic materials having sorption opportunities ...
  • Radiation stimulation of the catalytic activity of zirconium dioxide nanoparticles during the conversion of hydrocarbons 
    Dikiy, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V. (Вопросы атомной науки и техники, 2021)
    The comparison of the catalytic activity of the initial and activated by bremsstrahlung γ-radiation on a high-current electron accelerator of zirconium dioxide nanoparticles on the nature of the conversion of ethanol. The ...
  • Radiative stability and sorption ability of clinoptilolite nanoparticles 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Fedorets, I.D. (Вопросы атомной науки и техники, 2015)
    The ion exchange of clinoptilolite nanoparticles by means of a radioactive isotope ¹³²Cs was studied. The caesium capacity for clinoptilolite nanoparticles at size 90 nanometers at reaching of an equilibrium was 55 mg/g.
  • Radioactive enhancement of methanol conversion by zinc oxide nanoparticles 
    Dikiy, N.P.; Dovbnya, A.N.; Fedorets, I.D.; Khlapova, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Gavrik, A.P. (Вопросы атомной науки и техники, 2011)
    On the example of a model system the methanol conversion on activated ZnO nanoparticles is investigated at room temperature. Activation of ZnO nanoparticles is carried out by bremsstrahlung at Egmax=22 MeV and I=500 mA. ...
  • Radionuclide accumulation by objects of ecosystem 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Botova, M. A.; Fedorets, I.D. (Вопросы атомной науки и техники, 2014)
    The isotope contents of family uranium and thorium in the ash of wood of trees and pine needles before and after leaching by water were measured. The element contents in the ash of wood of trees and pine needles were ...
  • Radionuclide biosorption by the aquatic plants of Pistia stratiotes 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Botova, M.A.; Khlapova, N.P.; Fedorets, I.D. (Вопросы атомной науки и техники, 2014)
    The activity of leaves and roots of Pistia stratiotes from the Seversky Donets river has been measured. The visible activity of ¹³¹I in roots of plant is found. The content estimate of ¹³¹I in water of Seversky Donets river ...
  • Sorption properties of magnesium-potassium phosphate matrix 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Saenko, S.Y.; Shkuropatenko, V.A.; Tarasov, R.V.; Fedorets, I.D. (Вопросы атомной науки и техники, 2015)
    Sorption characteristics of fine-dispersed magnesium-potassium phosphate ceramics KMgPO₄·6H₂O for immobilization of ¹³⁷Cs was investigated. The Cs specific capacity 2.97 mg/g at pH=4 was detected. The high selectivity of ...
  • Structural phasic characteristics of nanoparticles oxides Samarium-153 by influence gamma activation 
    Dikiy, N.P.; Krasnoselskiy, N.V.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V. (Problems of Atomic Science and Technology, 2023)
    The isotope ¹⁵³Sm (T₁/₂ = 46.3 h, E = 810 keV) which emit is both therapeutic beta and diagnostic gamma energies and it is ideal for therapy plus diagnostic application. The specific activity of ¹⁵³Sm was increased by using ...
  • Study of the radiochemical and thermal conversions mechanism in products of processing of grapes 
    Dikiy, N.P.; Dovbnya, A.N.; Kutovoy, V.A.; Kutovoy, S.V.; Medvedeva, E.P.; Medvedev, D.V.; Borisenko, N.V. (Вопросы атомной науки и техники, 2005)
    The extraction of biologically active substance was carried out with help of combination of the physical factors: various conditions of temperature (40, 50, 60°С) and pressure of vacuum drying (8, 14, 16 mm Hg), and also ...
  • The content of natural radioactive isotopes in soil of Kharkov region 
    Dikiy, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Parhomenko, Yu.G.; Fedorets, I.D. (Вопросы атомной науки и техники, 2017)
    The content and migration of natural radioactive isotopes in some lot of the surface soil of the Kharkiv region have been studied by the help of low background gamma spectroscopy. The migration series of radioactive elements ...
  • The dynamics of element content in patients with lung cancer during radiotherapy 
    Dikiy, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Borovlev, V.I.; Zabolotny, V.D.; Medvedev, D.V.; Pilipenko, N.I.; Starenky, V.P.; Suhina, E.N. (Вопросы атомной науки и техники, 2009)
    Determination of the element contents in the biological samples (blood, serum of blood, hair) of patients with the diagnosis of lung cancer III degree is carried out during beam therapy. The method of PIXE excited by ...
  • The effect of gamma radiation on structure of struvite-К 
    Bereznyak, E.P.; Dikiy, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Sayenko, S.Y.; Uvarov, V.L.; Fedorets, I.D.; Hodyreva, Y.S. (Вопросы атомной науки и техники, 2017)
    The effect of gamma radiation upon functional characteristics of nanostructural struvite-K is analyzed. Spectra of absorption struvite-K have been measured in infra-red area. Results of a microstructure of samples after ...