Yazar "Kaya, S." seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    Öğe
    Improvement of the Nature of Indentation Size Effect of Bi-2212 Superconducting Matrix by Doped Nd Inclusion and Theoretical Modeling of New Matrix
    (Springer, 2014) Ozturk, O.; Asikuzun, E.; Kaya, S.; Yildirim, G.; Turkoz, M. B.; Kilic, A.
    Neodmium (Nd) inclusions at different stoichiometric ratios (x=0.0, 0.001 %, 0.005 %, 0.01 %, 0.05 %, 0.1 %) are doped in the Bi-2212 superconducting samples and the samples obtained are subjected to the sintering process at 840 C-a similar to constant temperature for 72 hours. The effect of Nd doping on the structural and mechanical properties of prepared samples is investigated by the standard characterization measurements. XRD and SEM measurements are performed to obtain information about surface morphology, phase ratios, lattice parameters and particle size. Moreover, Vickers microhardness (H (V) ) measurements are exerted to investigate the mechanical properties of the all samples in detail. It is found that all the properties given above retrogress with the increase of the Nd concentration in the Bi-2212 superconducting core. However, the ISE nature of the materials improves systematically. Additionally, the experimental results of microhardness measurements are analyzed using Meyer's law, PSR, MPSR, EPD models and HK approach. The results show that Hays-Kendall approach is determined as the most successful model.
  • [ X ]
    Öğe
    Investigation of veterinary drug residues in sea water, sediment, and wild fishes captured around fish farms in the Aegean Sea: Sulfonamides (Sulfamerazine, SMR; Sulfadimidine, SMT; Sulfamethoxazole, SMXZ; Sulfadimethoxine, SDMX)
    (Wiley-Blackwell, 2015) Baydan, E.; Kaya, S.; Cagırgan, H.; Yiıdırım, E.; Altıntaş, L.; Yurdakok Dikmen, B.; Küçükosmanoğlu, A. G.
    …
  • Küçük Resim
    Öğe
    Total testosterone, cortizol, growth hormone and fluorine levels in fluorine intoxicated rabbits
    (Scientific Technical Research Council Turkey, 2001) Akdoğan, M.; Bilgili, A.; Kaya, S.; Yarsan, E.; Üstüner, E.
    In this study, the effects of fluorine given subchronically (70 days) in drinking water (1, 10, 40 mg/L) were assessed in New Zealand male rabbits and their effects on total testosterone, cortisol and growth hormone (GH) levels were determined. Blood samples were taken from control and experimental groups after 0, 21 and 70 days and total testosterone, cortisol, GH and fluorine levels were measured. As a result, in animals given 10 mg/L fluorinated water, on the 21(st) day there was a statistically significant (p<0.01) drop in the cortisol levels and it was found that the drop in the testosterone levels and the rise in the GH levels were statistically insignificant. In animals given 10 mg/L fluorinated water, the drops in the cortisol and GH levels on the 70(th) day were statistically significant (p<0.01). in animals given 40 mg/L fluorinated water, the drops in the cortisol and GH levels on the 21(st) day were statistically significant (p<0.01). Also, on the 70(th) day the drop in the testosterone levels was statistically significant (p<0.05) and the drop in the cortisol and GH was very significant (p<0.001). Fluorine levels significantly rose during the study (p<0.001). depending on the species, doses and duration of application.