Güncel Gönderiler: Fizik Bölümü
Toplam kayıt 1178, listelenen: 441-460
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Conformational analysis and vibrational spectroscopic investigation of 3-phenylpropylamine
(Elsevier Science BV, 2009)The possible stable forms of 3-phenylpropylamine (3-PPA) molecule were experimentally and theoretically studied by infrared and Raman spectroscopy. FT-IR and Raman spectra of 3-PPA were recorded in the regions of 4000-400 ... -
Vibrational spectroscopic and thermal studies of some 3-phenylpropylamine complexes
(Elsevier Science BV, 2009)Four new Hofmann-3-phenylpropylamine (3PPA) type complexes with chemical formulae M(3PPA)(2)-Ni(CN)(4) (M = Ni, Co, Cd, and Pd) have been prepared and their vibrational spectra are reported in the region of 4000-60 cm(-1). ... -
Experimental and computational studies on the absorption properties of novel formazan derivatives
(Scientific Technical Research Council Turkey-Tubitak, 2017)Eight novel 3-(4-(benzyloxy)phenyl)-5-(4-bromophenyl)-1-(4-substituted-phenyl)formazan (4a 4h) were synthesized by coupling of substituted phenylhydrazones with diazonium salts of 4-bromoaniline. The substituted phenylhydrazones, ... -
Novel formazan derivatives containing phenylsulfanyl and carbonyl units: synthesis, optical and electrochemical properties
(Royal Soc Chemistry, 2016)A series of phenylsulfanyl and aryl carbonyl containing formazan derivatives 4a-4h and 5a-5h were synthesized by coupling of substituted phenylhydrazones with diazonium salts of 2-(phenylthio) benzenamine and 5-chloro-2- ... -
Synthesis, crystal structure, optical and electrochemical properties of novel diphenylether-based formazan derivatives
(Royal Soc Chemistry, 2015)In this study, formazans 5a-5h were synthesized by coupling the reactions of substituted phenylhydrazone compounds 3a-3h with diazonium salt of 4-chloro-2-phenoxybenzenamine (4). The substituted phenylhydrazones 3a-3h were ... -
Schiff bases as corrosion inhibitor for aluminium in HCl solution
(Pergamon-Elsevier Science LTD, 2012)Three Schiff bases named 1,5-bis[2-(2-hydroxybenzylideneamino)phenoxy]-3-oxopentane (D1), 1,5-bis[2-(5-chloro-2-hydroxybenzylideneamino)phenoxy]-3-oxopentane (D2) and 1,5-bis[2-(5-bromo-2-hydroxybenzylideneamino)phenoxy] ... -
Emulsifier-free cationic latexes based on vinylbenzyl chloride and 2-(dimethylamino)ethyl methacrylate with adjusted hydrophilic-hydrophobic properties
(Wiley-Blackwell, 2015)Functional emulsifier-free cationic latexes based on styrenic monomer vinylbenzyl chloride (VBC) and acrylic monomer 2-(dimethylamino)ethyl methacrylate (DMA) were successfully prepared with dual quaternary ammonium ions ... -
alpha-In2S3 and beta-In2S3 phases produced by SILAR technique
(Taylor & Francis LTD, 2012)In2S3 films have been deposited by the successive ionic adsorption and reaction technique (SILAR) at room temperature. The films have been examined to evaluate the structural and optical properties. X-ray diffraction spectra ... -
Synthesis, characterization, tautomerism and theoretical study of some new Schiff base derivatives
(Pergamon-Elsevier Science LTD, 2011)New Schiff base derivatives were prepared by the condensation of 5-chloro and 5-bromo salicylaldehyde with bis(o-aminophenol)ethers. Five bis(o-nitrophenol)ether compounds were synthesized using some ditosylate, ... -
Effect of fatigue on fracture toughness and phase transformation of Y-TZP ceramics by X-ray diffraction and Raman spectroscopy
(Wiley-Blackwell, 2012)The aim of this study was to evaluate the effect of fatigue on fracture toughness and phase transformation of yttria-stabilized zirconia polycrystal materials (Cercon and Lava). The specimens were tested for indentation ... -
Biaxial flexural strength and phase transformation of Ce-TZP/Al2O3 and Y-TZP core materials after thermocycling and mechanical loading
(Korean Acad Prosthodontics, 2014)PURPOSE. The purpose of the present study was to evaluate the effect of thermocycling and mechanical loading on the biaxial flexural strength and the phase transformation of one Ce-TZP/Al203and two Y-TZP core materials. ... -
Octonic Form of Proca-Maxwell's Equations and Relativistic Derivation of Electromagnetism
(Springer/Plenum Publishers, 2013)We propose to write the Proca-Maxwell's equations, Klein-Gordon equation and electromagnetic energy conservation with magnetic monopole in terms of a new algebraic structure named as octon. The Lorentz transformations of ... -
Structural and optical properties of SnS semiconductor films produced by chemical bath deposition
(IOP Publishing LTD, 2009)SnS films have been deposited at room temperature by the chemical bath deposition technique. The films have been examined to evaluate their structure, morphology, composition and optical properties. SnS films were ... -
Effect of fatigue on biaxial flexural strength of bilayered porcelain/zirconia (Y-TZP) dental ceramics
(Elsevier Sci LTD, 2011)Objectives. The aim of this study was to evaluate the effect of fatigue on biaxial flexural strength of bilayered disks of two Y-TZP cores. Methods. Twenty bilayered veneer/zirconia disks were fabricated from each material ... -
Thermally activated flux mechanism in Mg-doped InN epitaxial film
(Taylor & Francis LTD, 2017)The superconducting behaviour of InN has been observed in many experiments where the origin of superconductivity is addressed to presence of (i) In-In chains in ab-plane, (ii) specific carrier density range limited Mott ... -
Buffer effects on the mosaic structure of the HR-GaN grown on 6H-SiC substrate by MOCVD
(Springer, 2017)High-resistive GaN (> 10(8) a"broken vertical bar cm) layers have been grown with different buffer structures on 6H-SiC substrate using metalorganic chemical vapor deposition reactor. Different combination of the GaN/AlN ... -
Power Loss Mechanisms in Indium-Rich InGaN Samples
(Springer, 2016)Molecular beam epitaxy-grown InxGa1-xN/GaN samples with indium fraction x ranging between 0.44 and 0.784 were studied by pulsed current-voltage (I-V) measurements at 1.7 K. The drift velocity, electron mobility, and ... -
Electron and hole energy relaxation rates in GaInNAs/GaAs quantum wells via deformation potential and piezoelectric scattering
(Wiley-V C H Verlag GMBH, 2013)The two-dimensional (2D) electron and hole energy relaxation associated with acoustic phonon emission in n- and p-type modulation doped Ga0.7In0.3NyAs1y/GaAs quantum wells has been investigated experimentally using ... -
Acceptor formation in Mg-doped, indium-rich GaxIn1-xN: evidence for p-type conductivity
(Springer, 2012)We report on the Mg-doped, indium-rich Ga (x) In1-x N (x < 30). In the undoped material, the intrinsic electron density is very high and as a result there is no detectable photoconductivity (PC) signal within the range of ... -
Temperature dependent energy relaxation time in AlGaN/AlN/GaN heterostructures
(Academic Press LTD- Elsevier Science LTD, 2012)The two-dimensional (2D) electron energy relaxation in Al0.25Ga0.75N/AlN/GaN heterostructures was investigated experimentally by using two experimental techniques; Shubnikov-de Haas (SdH) effect and classical Hall Effect. ...