Browsing Публикации в изданиях других стран by Title

Now showing items 110-129 of 1065

    • Pathways for photoinduced electron transfer in meso-nitro-phenyl-octaethylporphyrins and their chemical dimers 

      Knyukshto, V.; Zenkevich, E.; Sagun, E.; Shulga, A.; Bachilo, S. (1999)
      The photophysical properties of meso-nitro-phenyl-octaethylporphyrins and their dimers with electron-accepting NO₂ groups in the para-, meta- and ortho-positions of the phenyl ring were studied. For the ortho-NO₂ case in deaerated toluene at 295 K, strong fluorescence quenching is caused by the intramolecular electron transfer from the porphyrin S₁ state in the absence of phenyl ...
      2017-05-25

    • Photoelectric semiconductor converters with a large dynamic range 

      Vorobey, R. I.; Gusev, O. K.; Tyavlovsky, A. K.; Tyavlovsky, K. L.; Svistun, A. I.; Shadurskaya, L. I.; Yarzhembitskaya, N. V.; Kierczynski, K. (2014)
      Photoelectric semiconductor converters with a large dynamic range / R. I. Vorobey [et al.] // Przeglad Elektrotechniczny. – 2014. – Vol. 90, № 5. – PP. 75-78.
      2015-07-06

    • Photoinduced electron transfer dynamics for self-assembled porphyrin arrays in solutions and films 

      Zenkevich, E. I.; Kilin, D. S.; Willert, A.; Bachilo, S. M.; Shulga, A. M.; Rempel, U.; Borczyskowski, C. von (2001)
      Electronic excitation energy deactivation in self-assembled porphyrin triads has been studied by the time correlated single photon counting technique as a function of the solvent polarity (toluene-acetone mixtures), temperature (77-350 K), and mutual spatial arrangement of the donor and acceptor subunits. The donor (Zn-octaethylporphyrin chemical dimer) fluorescence quenching ...
      2017-05-26

    • Photoinduced relaxation processes in self-assembled nanostructures: multiporphyrin complexes and composites "CdSе/ZnS quantum dot-porphyrin" 

      Zenkevich, E. I.; Borczyskowski, C. von (2009)
      Here, we discuss self-assembled multicomponent organic/inorganic nanostructures. Self-assembled multiporphyrin triads were formed via non-covalent interactions of meso-phenyl bridged ZnOEP chemical dimer, (ZnOEP)₂Ph, with dipyridyl substituted tetrapyrrole extra-ligand. In tetrads, the dimer (ZnOEP)₂Ph is covalently linked via 5-mesoposition to additional electron acceptors ...
      2017-05-27

    • Photophysical and photochemical properties of potential porphyrin and chlorin photosensitizers for PDT 

      Zenkevich, E.; Sagun, E.; Knyukshto, V.; Shulga, A.; Mironov, A.; Efremova, O.; Bonnett, R.; Pinda Songca, S.; Kassem, M. (1996)
      Structural and optical properties as well as photophysical and photochemical parameters (excited S₁ and T₁ state lifetimes at 77 K and in the presence of O₂ in solution at 293 K; efficiencies of singlet oxygen, ¹Δg, generation) are presented for porphyrins and chlorins with potential for the PDT of cancer: chlorin p₆ and its trimethyl ester, chlorin e₆ and its Na₃ and K₃ salts, ...
      2017-05-25

    • Pipeline Synthesis and Optimization from Branched Feedback Dataflow Programs 

      Prihozhy, A.; Casale-Brunet, S.; Bezati, E.; Mattavelli, M. (Springer, 2020)
      Large dataflow designs are a result of behavioral specification of modern complex digital systems and/or a result of unfolding and transforming looped and branched programs. Since deep-submicron silicon technology provides large amounts of available resources, pipelining optimization without (or with minimal) resource sharing can give significant advantages in performance. ...
      2021-11-23

    • Plasmonic and Thermooptical Properties of Spherical Metallic Nanoparticles for Their Thermoplasmonic and Photonic Applications 

      Pustovalov, V. K.; Astafyeva, L. G.; Fritzsche, W. (Hindawi Publishing Corporation, 2014)
      Investigations and use of nanoparticles (NPs) as photothermal (PT) agents in laser and optical nanotechnology are fast growing areas of research and applications. The potential benefits of NPs applications include possibility for thermal imaging and treatment of materials containing of NPs, applications of NPs for light-to-thermal energy conversion, in catalysis, laser nanomedicine, ...
      2016-05-11

    • Profit optimization taking into account tax burden and market prices 

      Kochatau, N. V. (СПбГУ ИТМО, 2017)
      The article discusses the idea of search for maximum value profit in conditions of taxation. Using ratio method of estimation of the tax burden on the cash flows of the enterprise managed to construct a mathematical model that allows analyzing the profit by taking the derivative.
      2021-07-20

    • Radiationless intermolecular energy transfer with participation of acceptor excited triplet states 

      Gurinovich, G. P.; Zenkevich, E. I.; Sagun, E. I. (1982)
      Radiationless energy transfer between like and unlike molecules has been experimentally studied under conditions where acceptor molecules have been excited to the triplet state. Homogeneous singlet—triplet—triplet migration has been discovered in higbly concentrated chlorophyll “a” and pheophytin “a” solutions in castor oil at 183 K by measuring the variation of pigment relative ...
      2017-05-18

    • Regularities of intermolecular interactions and energy transfer in mixed associates of chlorophyll and its analogs 

      Zenkevich, E. I.; Losev, A. P.; Kochubeev, G. A.; Gurinovich, G. P. (Elsevier Scientific Publishing Company, 1978)
      Regularities of intermolecular interactions and energy transfer in mixed associates of chlorophyll and its analogs / E. I. Zenkevich [et al.] // Journal of Molecular Structure. – 1978. Vol. 45. – P. 423-436.
      2017-05-18

    • Resonance Raman spectra interpretation by molecular coherent state representation 

      Trifonov, N. (1992)
      In this paper the problem of exact summation over vibrational states of intermediate electronic level excited by resonance Raman scattering in a molecular system with an arbitrary number of vibrational modes is solved with the help of the coherent state representation. For matrix elements of the resonance Raman (RR) amplitude the expressions in the form of an integral and multiple ...
      2014-03-28

    • Resonant Raman Scattering of ZnS, ZnO, and ZnS/ZnO Core/shell quantum dots 

      Milekhin, A. G.; Yeryukov, N. A.; Sveshnikova, L. L.; Duda, T. A.; Himcinschi, C.; Zenkevich, E. I.; Zahn, D. R. T. (2012)
      Resonant Raman scattering by optical phonon modes as well as their overtones was investigated in ZnS and ZnO quantum dots grown by the Langmuir–Blodgett technique. The in situ formation of ZnS/ZnO core/shell quantum dots was monitored by Raman spectroscopy during laser illumination.
      2017-05-27

    • Resonant Raman studies of compositional and size dispersion of CdS₁₋ₓSeₓ nanocrystals in a glass matrix 

      Azhniuk, Yu. M; Milekhin, A. G.; Gomonnai, A. V.; Lopushansky, V. V.; Yukhymchuk, V. O.; Schulze, S.; Zenkevich, E. I.; Zahn, D. R. T. (2004)
      Resonant Raman scattering spectra of glass-embedded CdS₁₋ₓSeₓ nanocrystals are measured and complemented with TEM and optical absorption as well as photoluminescence data. The selectivity of the resonant Raman process not only for the size, but also for the composition of nanocrystals within the ensemble, is directly observed in the dependence of phonon band frequency, linewidth ...
      2017-05-27

    • Risk-management of investment projects 

      Savko, T.; Temichev, A. (КНИТУ, 2012)
      The article is devoted to the questions of risk management. The necessity of investment projects risk analysis is conditioned by the fact, that cash flows, built during the investment project creation, apply to future periods, and, therefore, have predictive character. Hence, the importance of investment projects risk-management is increasing, as just comprehensive risk management ...
      2018-04-11

    • A Ritz's method based solution for the contact problem of a deformable rectangular plate on an elastic quarter-space 

      Guenfoud, S.; Bosakov, S. V.; Laefer, D. F. (Elsevier, 2010)
      In this article, Ritz’s method is used to calculate with unprecedented accuracy the displacements related to a deformable rectangular plate resting on the surface of an elastic quarter-space. To achieve this required three basic steps. The first step involved the study of Green’s function describing the vertical displacements of the surface of an elastic quarter-space due to ...
      2018-09-13

    • Rzeczoznawstwo w Bialorusi 

      Trifonov, N. J. (2004)
      Trifonow, N. J. Rzeczoznawstwo w Bialorusi / N. J. Trifonow // XIII Krajowa konferencja rzeczoznawcow majątkowych "Refleksje nad zawodem rzeczoznawcy majatkowego w Unii Europejskiej - nadzieje i zagrozenia", 9-11 wrzesnia 2004 r. : Materialy konferencyjne. – Rzeszow: 2004. – P. 165-182.
      2014-01-27

    • Sci-Hub как зеркало комплектования научных и образовательных организаций онлайн-ресурсами 

      Шварцман, М. Е.; Лебедев, В. В.; Скалабан, А. В. (2015)
      Введение: для выбора оптимальной стратегии комплектования научных и образовательных учреждений онлайн-ресурсами необходимо использовать новые подходы. В качестве одного из них российские ученые могут выбрать сайт Sci-Hub как наиболее доступный в настоящее время ресурс для получения информации о зарубежных публикациях. Целью исследования является поиск дополнительных критериев ...
      2017-12-07

    • Self-assembled nanoscale photomimetic models: structure and related dynamics 

      Zenkevich, E. I.; Borczyskowski, C. von; Shulga, A. M.; Bachilo, S. M.; Rempel, U.; Willert, A. (2002)
      Using static and time-resolved measurements, dynamics of non-radiative relaxation processes have been studied in self-assembled porphyrin triads of various geometry, containing the main biomimetic components, Zn–porphyrin dimers, free-base extra-ligands (porphyrin, chlorin or tetrahydroporphyrin), and electron acceptors A (quinone or pyromellitimide). The strong quenching of the ...
      2017-05-26

    • Self-organization principles in the formation of multiporphyrin complexes and “semiconductor quantum dot-porphyrin” nanoassemblies 

      Zenkevich, E. I.; Borczyskowski, C. von (2014)
      In this paper, we review several aspects of molecular recognition (based on non-covalent binding interactions) occurring between meso-pyridyl substituted tetrapyrrole extra-ligands and chemical dimers of tetrapyrrolic macrocycles containing central Zn ions and spacers of various nature and flexibility. Experimental results obtained by us earlier are analyzed using a novel approach ...
      2017-05-27

    • Semiconductor A3B5 nanostructures for infrared femtosecond lasers 

      Rubtsova, N. N.; Kochubei, A. A.; Kovalyov, A. A.; Preobrazhenskii, V. V.; Putyato, M. A.; Semyagin, B. R.; Shamirzaev, T. S.; Borisov, G. M.; Kisel, V. E.; Kuleshov, N. V.; Kuril'chik, S. V.; Buganov, O. V.; Tikhomirov, S. A. (Institute of Physics, 2013)
      Two techniques were suggested and tested for the recovery time shortening of saturable absorbers on a base of A3B5 compounds including quantum wells. The first one, proposed by authors, is the sample post-growth treatment by UV laser radiation; it implied generation of point defects, which, in its turn, led to electron-hole recombination acceleration and to recovery time shortening ...
      2016-05-11