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  1. No Access

    Article

    Influence of the Microenvironment Dynamics of Tryptophan on Its Fluorescence Parameters at Different Temperatures

    The temperature dependences of the fast and slow fluorescence decay components of aqueous tryptophan solution after freezing under actinic light and in the dark were investigated in the temperature range from ...

    V. V. Gorokhov, P. P. Knox, B. N. Korvatovsky, S. N. Goryachev… in Biophysics (2023)

  2. No Access

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    Temperature Dependence of the Nonlinear Dynamics of the Deactivation of Excited States of Tryptophan in Various Media

    The authors’ research on the dynamics of the excited states of tryptophan in various solvents as a function of temperature (–170 to +20°С) is presented. The antibatic behavior of the temperature dependences of...

    V. V. Gorokhov, P. P. Knox, B. N. Korvatovsky… in Russian Journal of Physical Chemistry B (2023)

  3. No Access

    Article

    Increasing Reactive Load of a Generator–Transformer Unit under the Influence of Quasi-Direct Currents

    The parameters of the magnetization current of a block transformer are determined when the magnetic system is saturated under the influence of a quasi-direct current, taking into account the equipment of a syn...

    V. V. Vakhnina, V. V. Gorokhov, A. A. Kuvshinov… in Russian Electrical Engineering (2023)

  4. No Access

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    Temperature Dependence of Tryptophan Fluorescence Lifetime as an Indicator of Its Microenvironment Dynamics

    The spectral-kinetic characteristics of the fluorescence of the tryptophan molecule in an aqueous solution and in the composition of a protein (albumin) were studied in the temperature range from –170 to 25°C....

    V. V. Gorokhov, B. N. Korvatovsky, P. P. Knox… in Doklady Biochemistry and Biophysics (2021)

  5. No Access

    Article

    A Study of the Temperature Dependence of Tryptophan Fluorescence Lifetime in the Range of –170 to +20°С in Various Solvents

    The temperature dependences (–170...+20°C) of the fluorescence lifetime of tryptophan molecules in an aqueous solution, in solutions of glycerol (50 and 75% by volume), dimethyl sulfoxide (50 and 75% by volume...

    V. Z. Paschenko, V. V. Gorokhov, B. N. Korvatovsky, P. P. Knox… in Biophysics (2021)

  6. No Access

    Article

    Pulse–Periodic Diffuse Discharge with Self-Ionization in a Gas Flow

    A pulse–periodic diffuse discharge self-initiated in an atmospheric-pressure air flow passing through an annular gap with a strongly nonuniform electric field has been studied. The discharge serves as a source...

    S. N. Buranov, V. V. Gorokhov, V. I. Karelin, V. D. Selemir… in Technical Physics (2020)

  7. No Access

    Article

    On Transformation of Energy of Geomagnetic Disturbances

    Abstract—A mechanism responsible for the transformation of energy of geomagnetic disturbances into the energy of chemically active products is proposed. According to this mechanism, this transformation is impleme...

    V. V. Gorokhov, V. I. Karelin, V. D. Selemir in Izvestiya, Physics of the Solid Earth (2019)

  8. No Access

    Article

    Photophysical Properties of Upconverting Nanoparticle–Phthalocyanine Complexes

    Interaction between upconverting nanoparticles and aluminum octacarboxyphthalocyanine was studied. The efficiency of non-radiative energy transfer from the nanoparticles to phthalocyanine increased with the nu...

    D. A. Gvozdev, E. P. Lukashev, V. V. Gorokhov, V. Z. Pashchenko in Biochemistry (Moscow) (2019)

  9. No Access

    Article

    Statistical Studies of the Electric Breakdown in Nitrogen in the Duration Range of 3 ms–60 min

    The statistical characteristics of an electric breakdown in the nitrogen in the spike (cathode)–plane gap in the duration range of (3 × 10–3)–3600 s at voltages close to a static breakdown have been studied. It h...

    V. V. Gorokhov, V. I. Karelin, A. V. Perminov, P. B. Repin in Technical Physics (2018)

  10. No Access

    Article

    Influence of trehalose on high-temperature stability of the photosynthetic reaction centers

    The effect of heating at 65°C for 20 min on the absorption spectra and kinetics of the dark recombination of charges separated between photoactive bacteriochlorophyll and quinone acceptors was studied in dry f...

    P. P. Knox, E. P. Lukashev, N. Kh. Seifullina… in Doklady Biochemistry and Biophysics (2017)

  11. No Access

    Article

    Temperature dependence of tryptophan fluorescence lifetime in aqueous glycerol and trehalose solutions

    The temperature dependences of tryptophan fluorescence decay kinetics in aqueous glycerol and 1 M trehalose solutions were examined. The fluorescence decay kinetics were recorded in the spectral region of 292....

    V. V. Gorokhov, P. P. Knox, B. N. Korvatovskiy, N. Kh. Seifullina… in Biochemistry (Moscow) (2017)

  12. No Access

    Article

    The Effects of ultraviolet irradiation on hybrid films of photosynthetic reaction centers and quantum dots in various organic matrices

    The effects of ultraviolet radiation (up to 0.6 J/cm2) on the absorption spectra and electron transfer in dehydrated films of photosynthetic reaction centers from purple bacteria Rb. sphaeroides and hybrid struct...

    E. P. Lukashev, I. P. Oleinikov, P. P. Knox, N. Kh. Seifullina… in Biophysics (2017)

  13. No Access

    Article

    The influence of dipyridamole and its derivatives on the membrane energization state of Rhodobacter sphaeroides bacterial chromatophores

    The mechanisms of the specific influence of dipyridamole therapy remain as a subject of research. In the present work the effects of dipyridamole and some its derivatives on the energization state of photosynt...

    P. P. Knox, E. P. Lukashev, N. Kh. Seifullina, V. V. Gorokhov, A. B. Rubin in Biophysics (2017)

  14. No Access

    Article

    Synthesis of new 1-(3,4-dimethylphenyl)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one derivatives

    New substituted pyrazolo[3,4-d]pyrimidin-4-ones have been synthesized as a result of a series of transformations including hydrolysis of ethyl 5-amino-1H-pyrazole-4-carboxylates, cyclization of the carboxylic aci...

    M. E. Zhidkov, A. V. Kutkin, E. N. Fetisova… in Russian Journal of Organic Chemistry (2017)

  15. No Access

    Article

    Generation of radical form of dipyridamole at illumination of photosynthetic reaction centers of Rb. sphaeroides

    The study of the effect of vasodilator, antiplatelet agent, and inhibitor P-glycoprotein dipyridamole (DIP) on the functioning of the transmembrane protein of the reaction center (RC) of Rb. sphaeroides showed th...

    P. P. Knox, K. N. Timofeev, V. V. Gorokhov… in Doklady Biochemistry and Biophysics (2017)

  16. No Access

    Article

    Covalently linked hybrid structures of semiconductor nanocrystals and allophycocyanin

    Covalently linked hybrid structures of semiconductor nanocrystals (CdSe/ZnS quantum dots) as an inorganic component with a fluorescence maximum at 620 nm and photosynthetic protein allophycocyanin (APC) as an ...

    A. A. Karpulevich, E. G. Maksimov, V. V. Gorokhov… in Nanotechnologies in Russia (2017)

  17. No Access

    Article

    The efficiency of non-photochemical fluorescence quenching by cation radicals in photosystem II reaction centers

    In a direct experiment, the rate constants of photochemical k p and non-photochemical k p + quenching of the c...

    V. Z. Paschenko, A. A. Churin, V. V. Gorokhov, N. P. Grishanova… in Photosynthesis Research (2016)

  18. No Access

    Article

    A comparison of the temperature dependence of charge recombination in the ion-radical pair P870+QA - and tryptophan fluorescence in the photosynthetic reaction centers of Rhodobacter sphaeroides

    The temperature dependences of the charge-recombination rate in the ion-radical pair P870+QA - in photosynthetic reaction centers of Rhodobacter sphaeroides were investigated. Reco...

    P. P. Knox, E. P. Lukashev, B. N. Korvatovskii, V. V. Gorokhov… in Biophysics (2016)

  19. No Access

    Article

    Non-photochemical fluorescence quenching in photosystem II antenna complexes by the reaction center cation radical

    In direct experiments, rate constants of photochemical (k P) and non-photochemical (k P + ) flu...

    V. Z. Paschenko, V. V. Gorokhov, N. P. Grishanova… in Biochemistry (Moscow) (2016)

  20. No Access

    Article

    An indirectly heated metal oxide hot cathode with a 100-cm2 area

    Results of designing of a sectioned metal oxide hot cathode with indirect heating and a total emission coating area of 100 cm2 are described. The design of the hot cathode enables control of the working surface t...

    M. M. Ivanov, V. I. Karelin, V. V. Gorokhov… in Instruments and Experimental Techniques (2016)

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