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61.
Raif Kurtaran Cengiz Arici Sefa Durmu Din?er Ulkü Orhan Atakol 《Analytical sciences》2003,19(2):335-336
In the title compound, the coordination around the Cu atom is a distorted square-pyramid involving three N atoms from the ligand and one N atom from the azido group at the basal plane. The Cl atom is located at the apical position. The Cu atom is 0.32(5)A above the basal plane. There are three intramolecular and four weak intermolecular hydrogen bonds in the structure. IR spectra confirm the asymmetric N3 stretching vibrations of the terminal azide group. 相似文献
62.
63.
M. Cengiz Dökmeci 《Meccanica》1973,8(4):252-260
Summary With a view toward the consistent derivations and numerical solutions of one- and two-dimensional approximate theories in
a class of Cosserat continuum, a variational theorem is, in a straightforward manner, established by means of Hamilton's principle.
By the use of this theorem, a linear theory of anisotropic shells for both extensional and flexural motions, including thermal
effects, is systematically constructed. A theorem of uniqueness in this theory is then presented.
Supported by the U.S. Office of Naval Research. 相似文献
Sommario Per mezzo del principio di Hamilton si stabilisce direttamente un teorema variazionale in vista di organiche derivazioni e soluzioni numeriche di teorie approssimate a una e a due dimensioni in una classe di continui di Cosserat. Con questo teorema si costruisce sistematicamente una teoria lineare di membrane anisotropiche per movimenti estensionali e flessionali includendo gli effetti termici. Si presenta poi in questo teorema una teoria di unicità.
Supported by the U.S. Office of Naval Research. 相似文献
64.
We report the monomer reactivity ratios for copolymers of ethyl methacrylate (EMA) and a reactive monomer, 2‐[(5‐methylisoxazol‐3‐yl)amino]‐2‐oxo‐ethyl methacrylate (IAOEMA), using the Fineman‐Ross, Kelen‐Tüdös, and a nonlinear error invariable model method using a computer program RREVM. Copolymers were obtained by radical polymerization initiated by α,α'‐azobisisobutyronitrile in 1,4‐dioxane solution and were analyzed by FTIR, 1H‐NMR, and gel permeation chromatography. Elemental analysis was used to determine the molar fractions of EMA and IAOEMA in the copolymers. The reactivity ratios indicated a tendency toward ideal copolymerization. The polydispersity indices of the polymers determined using gel permeation chromatography suggest a strong tendency for chain termination by disproportionation. Thermal behaviors of copolymers with various compositions were investigated by differential scanning calorimetry and thermogravimetric analysis. It was observed that glass transition temperature of copolymers increased with increasing of IAOEMA content in copolymers. Also, the apparent thermal decomposition activation energies (ΔEd) were calculated by Ozawa method using the SETARAM Labsys TGA thermobalance. The homo‐ and copolymers were tested for their antimicrobial properties against selected microorganisms. All the products show moderate activity against different strains of bacteria, fungi and yeast. 相似文献
65.
Photoinduced desorption (PID) of Xe from porous silicon (PSi) following UV irradiation has been studied. A nonthermal, morphology, and wavelength dependent phenomenon with more than 3 orders of magnitude enhancement of Xe PID within pores over atoms adsorbed on top of flat surfaces has been recorded, displaying extraordinary large cross sections up to σ(Xe/PSi)=2×10(-15) cm(2). A long-lived, photoinduced, charge separated silicon-xenon complex is proposed as the precursor for this remarkable photodesorption process. 相似文献
66.
67.
Aysegül Toker Suna Kondakci Nesim Erkip 《The Journal of the Operational Research Society》1991,42(9):811-814
This paper examines a single-machine, non-renewable-resource-constrained scheduling problem where jobs have arbitrary processing times and resource requirements. Unit supply of a resource is assumed at each time period. Performance criterion is makespan. It is proved that this problem is identical to the two-machine flowshop problem, enabling the use of Johnson's algorithm. Immediate extensions of this result are presented. 相似文献
68.
69.
Tuncer aykara Cengiz
zyürek
mer Kantolu Olgun Güven 《Journal of Polymer Science.Polymer Physics》2002,40(18):1995-2003
The solubility parameters of pure poly(2‐hydroxyethyl methacrylate) (PHEMA) and poly(2‐hydroxyethyl methacrylate/itaconic acid) [P(HEMA/IA)] hydrogels were determined by 20 solvents with various solubility parameters in swelling experiments. The solubility parameter of pure PHEMA was 26.93 ± 0.46 (MPa)1/2. The effect of mole percentages of itaconic acid (IA) in P(HEMA/IA) hydrogels on the solubility parameter was investigated. The measured values were compared to literature and solubility values theoretically determined by group contribution values of van Krevelen and Hoy. The incorporation of IA into the hydrogel system slightly increased the solubility parameter. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 1995–2003, 2002 相似文献
70.
Muharrem Kaya Cengiz Yenikaya Alper Tolga Colak Ferdag Colak 《Russian Journal of General Chemistry》2008,78(9):1808-1815
Two different metal complexes of [Co(HL)(L)(Ac)2]·4H2O (I) and [Ni2(L)2(Ac)2]·4H2O (II), have been synthesized with newly prepared amine-imine-oxime ligand [HL = 3-(4′-aminobiphenyl-4-ylimino)-butan-2-one oxime,
Ac = CH3COO−]. This ligand HL was prepared by the condensation of diacetylmonoxime with benzidine. The structure of the ligand and complexes
have been proposed by elemental analyses, IR, 1H, and 13C NMR, electronic spectra, magnetic susceptibility measurements, mass spectra, molar conductivity and thermo gravimetric analysis.
The molar conductance measurements of the complexes in DMF solution correspond to non electrolytic nature for the complexes.
Octahedral and tetrahedral geometries have been determined to the complexes of Co(III) and binuclear Ni(II) respectively.
The ligand and its metal complexes were tested in vitro for their biological effects. Their activities against two gram-positive
(Bacillus subtilis and Staphylococcus aureus) and one fungal specie (Candida albicans) were found. They were inactive against tested gram negative bacteria.
The text was submitted by authors in English. 相似文献