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    Bis(?-4-methylbenzoato)-?3O,O':O;?3O:O,O'-bis[aqua(4-methylbenzoato-?2O,O') (nicotinamide-?N1)cadmium]
    (Int Union Crystallography, 2012) Dincel, Oznur; Tercan, Baris; Cimen, Efdal; Necefoglu, Hacali; Hokelek, Tuncer
    In the dinuclear centrosymmetric title compound, [Cd-2(C8H7O2)(4)(C6H6N2O)(2)(H2O)(2)], the Cd-II ion is chelated by two carboxylate groups from 4-methylbenzoate anions, and is further coordinated by one nicotinamide and one water molecule; a carboxylate O atom from an adjacent 4-methylbenzoate anion bridges to the Cd-II ion, completing the irregular coordination sphere of the seven ligand atoms. In the crystal, intermolecular O-H center dot center dot center dot O, N-H center dot center dot center dot O and weak C-H center dot center dot center dot O hydrogen bonds link the molecules into a three-dimensional network. The methylbenzene moiety of one bridging 4-methylbenzoate anion is disordered over two orientations of equal occupancy.
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    Diaquabis(2-chlorobenzoato-?O) bis(nicotinamide-?N1)cobalt(II)
    (Int Union Crystallography, 2013) Dincel, Oznur; Tercan, Bans; Ozturkkan, Fureya Elif; Necefoglu, Hacali; Hokelac, Tuncer
    In the title complex, [Co(C7H4ClO2)(2)(C6H6N2O)(2)(H2O)(2)], the Co II cation is located on an inversion center and is coordinated by two 2-chlorobenzoate anions, two nicotinamide (NA) ligands and two water molecules. The four O atoms in the equatorial plane around the Co II cation form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two pyridine N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxylate group and the adjacent benzene ring is 29.7 (4)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 83.17 (15)degrees. Intramolecular O-H center dot center dot center dot O hydrogen bonding occurs between the carboxylate group and coordinating water molecule. In the crystal, intermolecular N-H center dot center dot center dot O, O-H center dot center dot center dot O and weak C-H center dot center dot center dot O hydrogen bonds link the molecules into a three-dimensional network.
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    Investigation of the wear behavior in simulated body fluid of 316L stainless steels produced by mechanical alloying method
    (Elsevier - Division Reed Elsevier India Pvt Ltd, 2021) Dincel, Oznur; Simsek, Ijlal; Ozyurek, Dursun
    In the present study, the wear behavior of 316L stainless steels (SS) produced with mechanical alloying (MA) method was investigated in simulated body fluid. Alloys produced in different MA times were sintered for 2 h at 1300 degrees C temperature. Specimens prepared with standard metallographic procedures after sintering, scanning electron microscopy, X-ray diffraction, powder size analyses, hardness, and density measurements were performed. Wear tests were carried out in pin-on-disc type wear device, Kokubo simulated body fluid and body temperature environment (in vitro). Surface roughness was measured before and after the wear test under 40 N at four different sliding distances with 1 ms(-1) sliding speed. Results showed that the powder size decreased as the milling time increased and the lowest powder size was measured for the powder milled for 120 min. The highest hardness and lowest weight loss were achieved in specimens milled for 60 min, while the highest average surface roughness was achieved in specimens milled for 30 min. (C) 2020 Karabuk University. Publishing services by Elsevier B.V.