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  1. No Access

    Article

    Theoretical Study of the Grinding and Homogenization of a Binary Mixture of Reactive Powders in a Mechanical Activator

    A mathematical model in a macroscopic approximation is used to perform a theoretical study of solid-phase mechanochemical synthesis in a binary powder mixture during its mechanical processing in a mechanoactiv...

    O. V. Lapshin, V. V. Boldyrev, E. V. Boldyreva in Russian Journal of Physical Chemistry A (2021)

  2. No Access

    Article

    Mathematical Model of the Grinding and Mixing of Powder Binary Solids in a High-Energy Mill

    A mathematical model is developed for macroscopic approximation and quantitative calculations of the dynamics of mixing of solid components of a binary powder mixture during its dispersion in a grinding unit. ...

    O. V. Lapshin, V. V. Boldyrev, E. V. Boldyreva in Russian Journal of Physical Chemistry A (2019)

  3. No Access

    Article

    A Model of Solid-Phase Synthesis in Binary Powder Mixtures with Allowance for Caking

    A mathematical model of solid-phase chemical synthesis in a binary powder mixture is constructed and studied with allowance for the shrinking of the mixture and the change in the reaction surface as a result o...

    V. K. Smolyakov, O. V. Lapshin, V. V. Boldyrev… in Russian Journal of Physical Chemistry A (2018)

  4. No Access

    Article

    Luminescence Spectroscopy as a Tool to Study the Amorphization of Indomethacin upon Co-Grinding with Polymers

    The possibility of using luminescence spectroscopy to study even the early stages of the amorphization of active pharmaceutical ingredients (APIs) during their co-grinding with different polymers has been demo...

    A. A. Politov, T. P. Shakhtshneider, E. V. Boldyreva… in Doklady Physical Chemistry (2018)

  5. No Access

    Article

    Dynamics of the Homogenization of Binary Powder Mixtures

    The effect the initial structure of a two-component reaction powder mixture has on the dynamics of its isothermal homogenization is investigated. Relations for determining the duration of homogenization are ob...

    O. V. Lapshin, V. K. Smolyakov, E. V. Boldyreva… in Russian Journal of Physical Chemistry A (2018)

  6. No Access

    Article

    About the possibilities to detect intermediate stages in mechanochemical synthesis of molecular complexes

    We have developed a device to carry out mechanochemical reactions, which allows us to detect the intermediate products during the reaction and to stop mechanical treatment after they have been formed.

    I. A. Tumanov, A. F. Achkasov, E. V. Boldyreva… in Russian Journal of Physical Chemistry A (2012)

  7. No Access

    Article

    A new method for obtaining fine powders of paracetamol for compression without excipients

    A. G. Ogienko, E. V. Boldyreva, A. Yu. Manakov… in Doklady Physical Chemistry (2011)

  8. No Access

    Article

    Homogeneous nucleation from a supersaturated sulfur vapor in a laminar flow diffusion chamber

    S. V. Valiulin, V. V. Karasev, A. A. Onishchuk, S. V. Vosel’… in Doklady Physical Chemistry (2011)

  9. No Access

    Article

    Modification of the electronic state of indomethacin by mechanical activation

    V. V. Boldyrev, S. P. Gabuda, I. V. Drebushchak… in Doklady Physical Chemistry (2009)

  10. No Access

    Article

    The interaction of the theophylline metastable phase with water vapor

    The conditions of hydration of the stable and metastable theophylline phases were determined. Two-phase metastable phase/monohydrate and stable phase/monohydrate equilibrium pressures were measured at 25, 30, ...

    A. A. Matvienko, V. V. Boldyrev… in Russian Journal of Physical Chemistry A, F… (2008)

  11. No Access

    Article

    Dechlorination of contaminated sediments of Ionian Sea

    Natural dredged sediments contaminated by PCBs from the heavy industrialized harbor of Taranto (S. Italy) on the Ionian Sea, previously dechlorinated by mechanical activation in different ball mills (SPEX and ...

    V. A. Drebushchak, G. Intini, L. Liberti… in Journal of Thermal Analysis and Calorimetry (2007)

  12. No Access

    Article

    Grinding of drugs with pharmaceutical excipients at cryogenic temperatures

    The effect of cryogenic grinding on the indomethacin (IMC) and its mixtures with polyvinylpyrrolidone (PVP) was studied by powder X-ray diffraction and differential scanning calorimetry. Cryoground mixtures we...

    T. P. Shakhtshneider, F. Danède, F. Capet… in Journal of Thermal Analysis and Calorimetry (2007)

  13. No Access

    Article

    Grinding of drugs with pharmaceutical excipients at cryogenic temperatures

    The effect of cryogenic grinding on the piroxicam and its mixtures with polyvinylpyrrolidone (PVP) was studied by powder X-ray diffraction and differential scanning calorimetry (DSC). The crystallization of th...

    T. P. Shakhtshneider, F. Danède, F. Capet… in Journal of Thermal Analysis and Calorimetry (2007)

  14. No Access

    Article

    Diffusional-kinetic model of the joint dissolution of interacting poorly soluble substances

    A model of the dissolution and interaction of two poorly soluble substances with the formation of a readily soluble product was developed. The kinetic characteristics of the process were described for the diss...

    S. A. Chizhik, V. V. Boldyrev… in Russian Journal of Physical Chemistry A (2007)

  15. No Access

    Article

    Highly dispersed ferromagnetic systems based on superparamagnetic nickel particles and Li-Al double hydroxides

    V. P. Isupov, L. E. Chupakhina, R. P. Mitrofanova… in Doklady Physical Chemistry (2007)

  16. No Access

    Article

    Thermoanalytical investigation of drug–excipient interaction

    Piroxicam–excipient (chitosan or cellulose) mixtures after mechanical activation were investigated using DSC. Crystallization of amorphous piroxicam was detected near 80°C in the mixtures of the components act...

    V. A. Drebushchak, Tatyana P. Shakhtshneider… in Journal of Thermal Analysis and Calorimetry (2006)

  17. No Access

    Article

    Anodic dissolution of magnetic layers based on cobalt and nickel in conditions of electrodeposition of multilayered nanostructures by a single-bath method

    Methods of quartz microgravimetry (in solutions containing no copper ions) and strip** voltammetry (in copper-containing solutions) are used to study the process of anodic dissolution of thin deposits of pur...

    S. N. Ovchinnikova, A. I. Maslii, V. V. Boldyrev in Russian Journal of Electrochemistry (2006)

  18. No Access

    Article

    Thermoanalytical investigation of drug-excipient interaction

    Cellulose, chitosan and piroxicam were investigated by TG and DSC at heating up to 215°C, and by X-ray powder diffraction before and after the heating.

    V. A. Drebushchak1, T. P. Shakhtshneider… in Journal of Thermal Analysis and Calorimetry (2006)

  19. No Access

    Article

    Measurement of high pulsed pressures using the shift of ruby fluorescence lines

    Experiments on the formation of a high-pressure pulse in a solid under the action of a high-power (up to 3 TW/m2) pulsed (8 μs) flow of 0.8-MeV relativistic electrons and hot plasma have been performed. A techniq...

    A. V. Arzhannikov, V. V. Boldyrev… in Instruments and Experimental Techniques (2006)

  20. No Access

    Article

    The investigation of ancient pottery

    Ancient ceramic samples (single fragments and different parts of pots, unbroken and repaired; total about 180 samples) dated from the transitional period of late Bronze to early Iron Age (VIII-VI centuries BC)...

    V. A. Drebushchak, L. N. Mylnikova… in Journal of Thermal Analysis and Calorimetry (2005)

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