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  1. No Access

    Article

    pH-Sensitive Paramagnetic Probe 4-(Methylamino)-2-Ethyl-5,5-Dimethyl-4-Pyridine-2-Yl-2,5-Dihydro-1H-Imidazol-1-Oxyl for Controlling Microacidity Inside Poly-D,L-Lactide Films during Degradation In Vitro

    Monitoring of the acidity inside the pores of aliphatic polyesters during their swelling and hydrolysis is important challenge of biomedicine. pH-sensitive nitroxyl radical 5,5-dimetyl- 4-dimetylamino-2-ethyl-...

    T. A. Ivanova, M. Ya. Melnikov, P. S. Timashev… in Russian Journal of Physical Chemistry B (2023)

  2. No Access

    Article

    The Diffusion of TEMPONE Radical in the Graft Copolymer of N-Isopropylacrylamide with Oligolactide in the Presence of Supercritical Carbon Dioxide by In Situ EPR Method

    Impregnation of the thermoresponsive graft copolymer of N-isopropylacrylamide and oligolactide, (P(NIPAM-co-PLA)), with the composition 83.8 : 16.2 wt % with a stable nitroxyl radical, 4-oxo-2,2,6,6-tetramethyl-p...

    T. A. Ivanova, E. M. Zubanova, A. A. Popova… in Russian Journal of Physical Chemistry B (2022)

  3. No Access

    Article

    Aliphatic Polyesters for Biomedical Purposes: Design and Kinetic Regularities of Degradation in vitro

    This paper presents a brief review of the methods for creating and diagnosing materials based on aliphatic polyesters used to create temporary prostheses and dosage forms of prolonged action. After a review of...

    T. A. Ivanova, E. N. Golubeva in Russian Journal of Physical Chemistry B (2022)

  4. No Access

    Article

    Kinetics of Release of a Bifunctional 2,2,5,5-Tetramethyl-4-Phenyl-3-Imidazoline-1-Oxyl-3-Oxide Probe from Poly-D,L-Lactide Films Formed Using Supercritical Carbon Dioxide

    Optical spectroscopy and ESR spectroscopy were used for the first time to quantitatively describe the release of a nitroxyl probe from poly-D,L-lactide (PDLLA) films into phosphate buffer. The bifunctional pro...

    T. A. Ivanova, N. A. Chumakova, E. N. Golubeva… in Russian Journal of Physical Chemistry B (2021)

  5. No Access

    Article

    Kinetics of Release of the TEMPONE Nitroxyl Radical from Poly-D,L-Lactide Foamed in the Supercritical Carbon Dioxide Medium

    Abstract—The electron spin resonance method was used to quantitatively describe the release of a paramagnetic bioactive substance from a biodegradable polymer matrix. A standard spin probe TEMPONE was chosen as t...

    T. A. Ivanova, N. A. Chumakova, E. N. Golubeva… in Russian Journal of Physical Chemistry B (2019)

  6. No Access

    Article

    EPR Diagnostics of D,L-Polylactide Porous Matrices Formed in Supercritical CO2

    The regularities of formation of D,L-polylactide porous matrices in supercritical CO2 environment with simultaneous impregnation with paramagnetic biologically active 4-hydroxy-2,2,6,6-tetramethylpiperidine- 1-ox...

    N. A. Chumakova, E. N. Golubeva, T. A. Ivanova… in Russian Journal of Physical Chemistry B (2018)

  7. No Access

    Article

    Thermo- and photoinduced properties of the Fe(III) complexes with the pentadentate ligand according to the EPR data

    Compounds [Fe(Salten)L]BPh4 (Salten = N,N-bis[(2-oxyphenyl)methylene]-4-azaheptane-1,7-diamine; L = Him (I) and Pic (II)) were studied by the EPR method in the temperature range from 5 to 300 K. The thermoinduced...

    I. V. Ovchinnikov, T. A. Ivanova… in Russian Journal of Coordination Chemistry (2013)

  8. No Access

    Article

    Possible use of low-frequency esr to estimate the quadrupole coupling constant in copper(II) complexes in vitreous media

    R. S. Abrakhmanov, T. A. Ivanova in Journal of Structural Chemistry (1978)