Güncel Gönderiler

  • Comparative study of antitumor active cyclo(Gly-Leu) dipeptide: a computational and molecular modeling study 

    Çelik, Sefa; Özel, Ayşen E.; Akyüz, Sevim (Elsevier Science Bv, Po Box 211, 1000 AE Amsterdam, Netherlands, 2016-03)
    The conformational behavior and vibrational spectra of cyclo(Gly-Leu) dipeptide, which is an important biological active compound and a therapeudic agent, have been investigated by computational methods. The theoretically ...
  • Elemental Abundance Analyses with DAO Spectrograms. XXXIX. The Am Stars 2 UMa and 15 Vul 

    Çay, İpek; Teker Yelkenci, Ayşegül; Adelman, Saul J. (Iop Publishing Ltd, Temple Circus, Temple Way, Bristol Bs1 6Be, England, 2016-05)
    We derived the elemental abundances of the metallic-line stars 2 UMa (=HR 3354; spectral type A2m) and 15 Vul (=HR 7653; spectral type A4 III), using high-dispersion, high signal-to-noise ratio (>= 200) optical region ...
  • The effects of conformation and zwitterionic tautomerism on the structural and vibrational spectral data of anserine 

    Balcı, Kubilay; Akkaya, Yasemin; Akyüz, Sevim; Collier, W. B.; Stricker, Moogega C.; Stover, D. D.; Ritzhaupt, G.; Koch, Andreas; Kleinpeter, Erich (Elsevier Science Bv, Po Box 211, 1000 AE Amsterdam, Netherlands, 2016-09)
    In this study, the stable conformers of neutral anserine were searched by molecular dynamics simulations and energy minimization calculations using the MM2 force field. Thermochemical calculations at B3LYP/6-31G(d) level ...
  • A new correlation with lower kilohertz quasi-periodic oscillation frequency in the ensemble of low-mass x-ray binaries 

    Erkurt, M. Hakan; Duran, Sivan; Çatmabacak, Önder; Çatmabacak, Onur (Iop Publishing Ltd, Temple Circus, Temple Way, Bristol Bs1 6Be, England, 2016-11-01)
    We study the dependence of kilohertz quasi-periodic oscillation (kHz QPO) frequency on accretion-related parameters in the ensemble of neutron-star low-mass X-ray binaries. Based on the mass accretion rate, M, and the ...
  • In memoriam of a great man of neuroscience: Walter J. Freeman 

    Başar, Erol (Elsevier Science Bv, Po Box 211, 1000 AE Amsterdam, Netherlands, 2016-11)
  • The Large Observatory For x-ray Timing 

    Erkut, Mehmet Hakan (Spie-Int Soc Optical Engineering, 1000 20Th St, Po Box 10, Bellingham, Wa 98227-0010 Usa, 2014)
    The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final downselection for a launch slot in 2022-2024. Thanks to the unprecedented combination of effective ...
  • Structural and vibrational spectroscopic elucidation of sulpiride in solid state 

    Kecel Gündüz, Serda; Çelik, Sefa; Özel, Ayşen E.; Akyüz, Sevim (Taylor & Francis Inc, 530 Walnut Street, Ste 850, Philadelphia, Pa 19106 USA, 2015-02-01)
    The study on the conformational and vibrational behaviors of sulpiride molecule which is known as a neuroleptic or antipsychotic drug that is widely used clinically in the treatment of schizophrenic or depressive disorders ...
  • A possible link between kHz quasi-periodic oscillations and the magnetospheric boundary 

    Erkut, Mehmet Hakan (E D P Sciences, 17 Ave Du Hoggar Parc D Activites Coutaboeuf Bp 112, F-91944 Cedex A, France, 2014)
    The quasi-periodic oscillations (QPOs) observed with a 200-1300 Hz frequency range in the X-ray power spectra of low mass X-ray binaries (LMXBs) might be considered as one of the observational clues to the physics at the ...
  • A Proposal to Extend Brodmann's Areas Concept to a New Model 

    Başar, Erol; Düzgün, Aysel; Güntekin, Bahar (Anka Publisher, 116-11 Sok No.10 K 2 D 2, Bornova, Izmir 35050, Turkey, 2014)
    Since the beginning of the last century, the localization of brain function is presented by Brodmann areas, or maps that are a result of anatomic organization. They are used in order to give a global idea of cortical ...
  • Structural and vibrational study of primidone based on monomer and dimer calculations 

    Çelik, Sefa; Kecel Gündüz, Serda; Özel, Ayşen E.; Akyüz, Sevim (Taylor & Francis Inc, 530 Walnut Street, Ste 850, Philadelphia, Pa 19106 USA, 2015-04-03)
    Primidone (Mysoline), with the chemical formula 5-ethyl-5-phenyl-hexahydropyrimidine- 4,6-dione (C12H14N2O2), has been a valuable drug in the treatment of epilepsy. In the present work, the experimental IR and Raman spectra ...
  • A vibrational spectroscopy study on 3-aminophenylacetic acid by DFT calculations 

    Akkaya, Yasemin; Balcı, Kubilay; Gören, Yeliz; Akyüz, Sevim (Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1Gb, England, 2015-08-05)
    In this study, in which the group vibrations of 3-aminophenylacetic acid were investigated by electronic structure calculations based on Density Functional Theory (DFT), the possible stable conformers of the molecule were ...
  • Lithium Excessively Enhances Alpha and Beta Oscillatory Responses in Bipolar Disorder 

    Atagün, Murat İlhan; Güntekin, Bahar; Tan, Devran; Tülay, Elif; Başar, Erol (Elsevier Science Inc, 360 Park Ave South, New York, Ny 10010-1710 Usa, 2013)
    Background: Previous resting-state electroencephalography studies have consistently shown that lithium enhances delta and theta oscillations in default mode networks. Cognitive task based networks differ from resting-state ...
  • Matrix Isolation Infrared Spectra and Photochemistry of Hydantoin 

    Öğrüç Ildız, Gülce; Nunes, Claudio M.; Fausto, Rui (Amer Chemical Soc, 1155 16Th St, Nw, Washington, Dc 20036 Usa, 2013)
    Hydantoin (C3H4N2O2, 2,4-imidazolidinedione) was isolated in argon matrix at 10 K and its infrared spectrum and unimolecular photochemistry were investigated. The molecular structure of the compound was studied both at the ...
  • A vibrational spectroscopy study on anserine and its aqueous solutions 

    Akkaya, Yasemin; Balcı, Kubilay; Gören, Yeliz; Akyüz, Sevim; Stricker, Moogega C.; Ritzhaupt, G.; Stover, D. D.; Collier, W. B. (Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1Gb, England, 2015-10-05)
    In this study based on vibrational spectroscopic measurements and Density Functional Theory (OFF), we aimed for a reliable interpretation of the IR and Raman spectra recorded for anserine in the solid phase and water (H2O) ...
  • Structural and Vibrational Study on Monomer and Dimer Forms and Water Clusters of Acetazolamide 

    Özel, Ayşen; Kecel Gündüz, Serda; Çelik, Sefa; Akyüz, Sevim (Hindawi Ltd, Adam House, 3Rd Flr, 1 Fitzroy Sq, London, W1T 5Hf, England, 2013)
    Experimental IR and Raman spectra of solid acetazolamide have been analysed by computing the molecular structures and vibrational spectra of monomer and dimer forms and water clusters of acetazolamide. The possible stable ...
  • Elemental and spectroscopic characterization of plasters from Fatih Mosque-Istanbul (Turkey) by combined micro-Raman, FTIR and EDXRF techniques 

    Akyüz, Tanıl; Akyüz, Sevim; Güleç, Ahmet (Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1Gb, England, 2015-10-05)
    The characterization of the plasters and coloring agents of the wall paintings of Fatih Mosque have been performed using combined micro-Raman, FTIR and EDXRF techniques. The investigations show that the plaster used on the ...
  • A mechanism for the dependence of sunspot group tilt angles on cycle strength 

    Işık, Emre (Iop Publıshıng Ltd, Temple Circus, Temple Way, Bristol Bs1 6Be, England, 2015-11-01)
    The average tilt angle of sunspot groups emerging throughout the solar cycle determines the net magnetic flux crossing the equator, which is correlated with the strength of the subsequent cycle. I suggest that a deep-seated, ...
  • Results of observations of asteroids at the Russian-Turkish RTT-150 telescope from 2004-2013 

    Aslan, Zeki; Gumerov, R. I.; Khamitov, I. M.; Hudkova, L. A.; Maigurova, N. V.; Pinigin, G. I.; Kochetova, O. M.; Chernetenko, Yu. A.; Pomazan, A. V.; Kryuchkovskiy, V. F. (Allerton Press Inc, 18 West 27Th St, New York, Ny 10001 Usa, 2015-11)
    We report the results of analysis of the data volume containing 13834 topocentric positions of 231 asteroids obtained from observations at the Russian-Turkish RTT-150 telescope (TUBITAK (Scientific and Technological Research ...
  • The vibrational analysis of pyridoxine and its H2O clusters By Ab-Initio density functional method 

    Bülbül, Berna Atak; Akü, Sevim (Yıldız Technical Univ, Yıldız Campus, Beşiktaş, İstanbul, 34349, Turkey, 2015-12)
    The conformations of pyridoxine were searched by means of torsion potential energy surfaces scan studies through dihedral angles D1 (9H-8O-4C-3C), D2 (12H-10C-5C-6N), D3 (15O-14C-2C-1C) and D4 (O22-19H-3C-2C). In all ...
  • Investigations of ancient terra-cotta sarcophagi, excavated in Enez (Ainos) Turkey, by Instrumental Neutron Activation Analysia 

    Akyüz, Sevim; Akyüz, Tanıl; Mukhamedshina, Nuranya M.; Balcı, Kubilay; Mirsagatova, A. Adiba; Kurap, Gülnur; Basarans, Sait (Croatian Chemical Soc, Marulicev Trg 19/Ii, 41001 Zagreb, Croatia, 2015-12)
    Ten terra-cotta sarcophagi, together with a terra-cotta aryballos (perfume jar), excavated in Su Terazisi necropolis of Enez-Turkey (Ancient Ainos), were investigated by Instrumental Neutron Activation Analysis (INAA), to ...

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