Güncel Gönderiler: Fen Fakültesi
Toplam kayıt 2379, listelenen: 2181-2200
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Thermally stimulated current analysis of Zn1-xCdxO alloy films
(Elsevier Science Sa, 2011)We have studied the structural and electrical properties of Zn1-xCdxO alloy films deposited by ultrasonic spray pyrolysis technique. XRD measurement indicated that pure ZnO and CdO samples had single phases with hexagonal ... -
Thermally stimulated currents in CdS film produced by ultrasonic spray pyrolysis method
(IOP Publishing LTD, 2008)Polycrystalline CdS films have been deposited by ultrasonic spray pyrolysis method. The electrical properties of the sample have been studied by means of an analysis based on the thermally stimulated current (TSC) spectrum ... -
Benzotriazole-Mediated Synthesis of Aza-peptides: En Route to an Aza-Leuenkephalin Analogue
(American Chemical Society, 2013)Novel N-(N-Pg-azadipeptidoyl)benzotriazoles 20a-e couple efficiently with alpha-amino acids 21a-e, dipeptides 22a-c, aminoxyacetic acid 23a, depsidipeptide 23b, and alpha-hydroxy-beta-phenylpropionic acid 27 yielding, ... -
Microwave-Assisted Synthesis of 2,2 '-Azopyridine-Labeled Amines, Amino Acids, and Peptides
(Georg Thieme Verlag Kg, 2016)A microwave-assisted procedure for labeling amines, amino acids, and peptides with 2,2'-azopyridines (2,2'-AzPy) is described using the corresponding 2,2'-azopyridine-diacylbenzotriazoles. The efficiency of the procedure ... -
Design, Synthesis, and Biological Activity of Novel 5-((Arylfuran/1H-pyrrol-2-yl)methylene)-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-4-ones as HIV-1 Fusion Inhibitors Targeting gp41
(American Chemical Society, 2011)On the basis of our earlier molecular docking analysis, we designed and synthesized 5-((arylfuran/1H-pyrrol-2-yl)methylene)-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-4-ones (12a-o) as HIV-1 entry inhibitors. Compounds ... -
Efficient Preparation of Aminoxyacyl Amides, Aminoxy Hybrid Peptides, and alpha-Aminoxy Peptides
(American Chemical Society, 2009)N-(Pg-alpha-aminoxy acids) 1a-g are converted to N-(Pg-alpha-aminoxyacyl)benzotriazoles 2a-g, Which react under mild conditions with amines, alpha-amino acids/alpha-dipeptides, and alpha-aminoxy acids to give aminoxyacyl ... -
Design, synthesis, and biological activity of a novel series of 2,5-disubstituted furans/pyrroles as HIV-1 fusion inhibitors targeting gp41
(Pergamon-Elsevier Science LTD, 2011)Based on molecular docking analysis of earlier results, we designed a series of 2,5-disubstituted furans/pyrroles (5a-h) as HIV-1 entry inhibitors. Compounds were synthesized by Suzuki-Miyaura cross coupling, followed by ... -
Benzotriazole-Mediated Syntheses of Depsipeptides and Oligoesters
(American Chemical Society, 2011)Reactions of O-Pg(alpha-hydroxyacyl)benzotriazoles with (a) unprotected alpha-hydroxycarboxylic acids, (b) amino acids, and (c) amines afforded, respectively, chirally pure (a) oligoesters, (b) depsidipeptides, and (c) ... -
Donor-related third-order optical nonlinearites in GaAs/AlGaAs quantum wells at the THz region
(IOP Publishing LTD, 2011)GaAs/AlGaAs quantum wells doped with donor atoms are investigated for nonlinear optical applications in the THz range. The electronic properties of the quantum wells are obtained numerically by applying an iterative shooting ... -
Synthesis and antimicrobial investigation of some 5H-pyridazino[4,5-b]indoles
(Scientific Technical Research Council Turkey-Tubitak, 2013)Synthesis and in vitro antimicrobial activities are reported for a series of 1,3,5-substituted 4-oxo-3,4-dihydro-5H-pyridazino[4,5-b]indole derivatives. Corresponding pyridazino[4,5-b]indoles were prepared from ethyl ... -
Photophysics of novel coumarin-labeled depsipeptides in solution: sensing interactions with SDS micelle via TICT model
(Springer Wien, 2013)N-Acylbenzotriazoles enable the synthesis (69-92 % yield) of blue to green fluorescent coumarin-labeled depsidipeptides 8a-f (quantum yields 0.004-0.97) and depsitripeptides 12a-d (quantum yields 0.02-0.96). Detailed ... -
On the donor states in double InxGa1-xN/InyGa1-yN/GaN staggered quantum wells
(IOP Publishing LTD, 2013)We have calculated the binding energies of the donor states, 1s and 2p +/-, with respect to the lowest sub-band energy in a double quantum well composed of wurtzite InGaN staggered quantum wells with GaN barriers. All the ... -
Binding energies and oscillator strengths of impurity states in wurtzite InGaN/GaN staggered quantum wells
(Amer Inst Physics, 2012)Using the variational methods, we have calculated the binding energies of the lowest donor states, 1s and 2p(+/-), in wurtzite InGaN/GaN staggered quantum wells. The binding energies in narrow wells are larger in magnitude ... -
Influence of the lattice mismatch on the lattice vibration modes for InAs/GaSb superlattices
(Elsevier Science BV, 2016)Raman scattering study on a group of InAs/GaSb superlattice (SL) samples where the strain is systematically changed from tensile to compressive regime is presented. The effect of the lattice mismatch between the substrate ... -
Second harmonic generation in asymmetric MgSe/CdSe/ZnCdMgSe quantum well structures
(Wiley-V C H Verlag GMBH, 2017)MgSe/CdSe/ZnCdMgSe step quantum well structures and coupled quantum well structures under an applied electric field have been investigated for the process of second harmonic generation (SHG) with the double-resonant ... -
Redundant Sb condensation on GaSb epilayers grown by molecular beam epitaxy during cooling procedure
(Elsevier Science Sa, 2014)The effect of four different cooling receipts on the surface morphologies of unintentionally-doped GaSb epilayers on GaSb (100) substrates grown by molecular beam epitaxy is reported. Those receipts include three different ... -
A comparative photoluminescence study on Mn-Free GaAs/AlAs and Mn-containing Ga1-xMnxAs/AlAs quantum wells (QWs) grown on various orientations by MBE
(Taylor & Francis LTD, 2016)Optical properties of diluted magnetic semiconductor Ga0.999Mn0.001As/AlAs quantum well structures grown on (1 0 0 ), (1 1 0), (3 1 1)B and (4 1 1)B by molecular beam epitaxy are reported. Temperature-dependent spectral ... -
Effect of the Passivation Layer on the Noise Characteristics of Mid-Wave-Infrared InAs/GaSb Superlattice Photodiodes
(IEEE-Inst Electrical Electronics Engineers Inc, 2012)The authors describe the noise characterization of a mid-wavelength-infrared (MWIR) photodiode based on indium arsenide and gallium antimonide (InAs/GaSb) superlattice (SL), addressing the influence of different passivation ... -
Intersubband transitions in InxGa1-xN/InyGa1-yN/GaN staggered quantum wells
(Amer Inst Physics, 2014)Intersubband transition energies and absorption lineshape in staggered InGaN/GaN quantum wells surrounded by GaN barriers are computed as functions of structural parameters such as well width, In concentrations, and the ... -
Effects of magnetic field on the terahertz nonlinear optical properties in donor-doped GaAs/AlGaAs quantum wells
(Wiley-V C H Verlag GMBH, 2012)Effects of the magnetic field on nonlinear optical properties at THz range in GaAs/AlGaAs quantum wells doped with donor atoms are investigated. Expressions for the third-order nonlinear optical susceptibilities are obtained ...
