Güncel Gönderiler: Fen Edebiyat Fakültesi
Toplam kayıt 2858, listelenen: 881-900
-
Epitaxy of highly optical efficient GaN on O and Zn face ZnO
(2003)ZnO is a highly efficient photon emitter, has optical and piezoelectric properties that are attractive for a variety of applications. Due to its stacking order and close lattice to GaN, it is also considered as a substrate ... -
Electron transport mechanism in GaN/AlGaN HEMT structures
(2003)The electron transport mechanism in GaN/AlGaN HEMT (High Electron Mobility Transistors) structures grown with MBE on sapphire substrate was investigated by using the temperature dependence of the Hall coefficient, resistivity, ... -
The aspects of the Late Quaternary (Holocene) setting belong to the eastern Gulf of Izmit, Adapazarı, the delta of Sakarya and their environments
(2004)This study is carried out on the settings of Holocene at eastern Gulf of ̇Izmit, Adapazari, Sakarya Delta and its vicinity, and based on 86 samples collected from the boreholes. The pollen diagram, based on the data from ... -
Synthesis and characterizations of LaM2Ḿ3S6-y(M: Mg, Ca, Sr, Ba; Ḿ:Cu, Fe), La2SrS4 and La2CaS 4
(2004)YN2M^3S6-y, (M= Ca, Sr, Ba, Mg and M= Cu, Fe) type of compounds were synthesized and the effect of rare earth elements on these type of compounds was investigated. By replacing Y with La, LaBa 2Cu3S6-y compound was synthesized ... -
Simple approach to fourth generation effects in B→X sℓ+ℓ- decay
(2004)In a scenario in which fourth generation fermions exist, we study the effects of new physics on the differential decay width, forward-backward asymmetry, and the integrated branching ratio for B›Xsl +l-, decay with (l = ... -
Pyroelectric effect in Langmuir-Blodgett films incorporating ions
(2004)Non-centrosymmetric materials exhibiting a temperature-dependent electric polarisation are known as pyroelectrics. It is well known that the tilting mechanism and proton transfer between acid/amine interactions play an ... -
Parasitic copepod Lernaeopoda galei Krøyer, 1837 (Copepoda: Siphonostomatoida): A first record from Turkish seas
(2004)The parasitic copepod Lernaeopoda galei and corresponding order Siphonostomatoida are recorded from Turkish seas for the first time. The parasites were collected from the cloacal region of Mustelus mustelus from Edremit ... -
On the principal congruence subgroups of the Hecke-group H(√5)
(2004)Using the notion of quadratic reciprocity, we discuss the principal congruence subgroups of the Hecke group H(√5). -
Extraction-ability and -selectivity of tetra-aza-crown ethers for transition metal cations
(Springer Netherlands, 2004)In order to investigate the relative effects of the differences between the structures and lipophilicities of 1 10-dioxa-4, 7, 13, 16-tetra-azacyclo- octadecane (TA-18-crown-6) and the tetrabenzyl derivative of 1,10-dioxa-4, ... -
Different contributions in ω → π0ηγ and ρ → π0ηγ decays
(American Physical Society, 2004)We examine the radiative ? › ?0?? and ? › ?0?? decays in a phenomenological framework We consider the vector meson dominance mechanism, chiral loops, intermediate a0-meson and ? - ? mixing. We find the values of the decay ... -
Comparison of female antennules in some genera of Cyclopidae (Copepoda, cyclopoida): Their significance for phylogeny
(2004)The homology of the antennulary segments of species belonging to some genera of Cyclopidae is determined by comparing the common setation patterns on female antennules. Comparison of the setation pattern has confirmed that ... -
Colonial and morphological characteristics of some Aspergillus Fr.: Fr. species isolated from vineyards in Manisa and Izmir Provinces (Turkey)
(2004)Five Aspergillus Fr.:Fr. species and 3 varieties were described from the point of view of colonial and morphological characteristics. These species and varietes are isolated from soil, grape and sultana raisins from vineyards ... -
Room temperature conduction characteristics of calix [4] acid/amine alternate layer Langmuir-blodgett films
(2005)Multilayered Langmuir-Blodgett (LB) films were prepared by transferring alternately six layers of calix [4] acid and five calix [4] amine molecules from the subphase of Millipore water (18MΩ cm-1) on aluminised glass ... -
Poly(methyl methacrylate) monolayers at the air-water interface
(2005)Several poly(methyl methacrylate) (PMMA) molecules with various chain numbers has been synthesised using Emulsifier-free emulsion polymerisation method. Langmuir-Blodgett thin film technique is an excellent method to ... -
Investigation of separation and identification possibilities of some metal-DEDTC complexes by sequential TLC-IR system
(Preston Publications, 2005)The separation and identification possibilities of some metal-diethyldithiocarbamate (DEDTC) complexes are investigated by thin-layer chromatography-IR sequential system. DEDTC complexes of metal cations are prepared in a ... -
Cs adsorption on Si(001) surface: An ab initio study
(2005)First-principles calculations using density functional theory based on norm-conserving pseudopotentials have been performed to investigate the Cs adsorption on the Si(001) surface for 0.5 and 1 ML coverages. We found that ... -
A new species of schizopera sars, 1906 (Copepoda: Harpacticoida) from Israel
(2005)Both sexes of Schizopera samchunensis n. sp. (Copepoda: Harpacticoida: Diosaccidae) are described from the Hula valley in Israel with the aid of light and electron (SEM) microscopes. The differences between the new species ... -
A new route for the synthesis of cadmium sulfide by reacting of cadmium oxide with sulfidizing gas mixture
(2005)In this study, the sulfidization of CdO was investigated by using solid-gas reactionsunder sulfidizing gas mixture which contains the gas mixture of carbonyl sulfide, COS, carbondisulfide, CS2 and sulfur, S 2. The greenockite ... -
The synthesis of NiS, ZnS and SrS through solid-gas reaction of sulfidizing gas mixture
(2006)In this study, the sulfidizations of NiO, ZnO, SrNO 3 and SrCO 3 were investigated by using solid-gas reactions under sulfidizing gas mixture, which contains the gas mixture of carbonyl sulfide (COS), carbon disulfide (CS ...
