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  • Küçük Resim Yok
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    Activation energy for crystallisation of melt-quenched (Bi1.0Tl0.5Ga0.5) Sr2Ca2Cu3O10+y superconducting glass-ceramics
    (Academic Press Ltd, London, United Kingdom, 1997) Yakinci M.E.; Aksoy I.
    A glass of the BiSrCaCuO superconducting system with nominal (Bi1.0Tl0.5Ga0.5)Sr2Ca2Cu3O10+y composition has been prepared by the melt-quenched method. The crystallisation kinetics of the glass was investigated using non-isothermal analysis. The activation energy for crystallisation was found to be 420.6Kjmol-1. The superconducting transition and zero resistance temperatures were Tc = 118.8K and Tzero = 114.6K respectively. The calculated critical current density was Jc = 8.85 ×106 Acm-2 at 4.5K. In general, substitution of both Tl+3 and Ga+3 for Bi+3 increased the activation energy for crystallisation and enhanced the superconducting phase formation.
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    The effect of hysteroscopic polypectomy on the gene expression of endometrial receptivity markers: HOXA10, HOXA11 and LIF
    (Gene Therapy and Molecular Biology, 2014) Yildirim E.; Celik O.; Akgoz M.; Aksoy I.; Türkan A.; Karaca Z.M.; Cigremis Y.
    The aim of this study is to determine the effect of hysteroscopic polypectomy on the mRNA expression levels of the endometrial receptivity markers, namely, homeobox A10 (HOXA10), homeobox A11 (HOXA11) and leukemia inhibitory factor (LIF). Twenty-five reproductive-aged women with endometrial polyps underwent hysteroscopy. Samples were taken at the mid-secretory phase using hysteroscopic polypectomy and 4 months after polypectomy, and the change in mRNA expression levels of normalized HOXA10, HOXA11 and LIF genes were determined using Reverse Transcription Quantitative Real Time-Polymerase Chain Reaction (RT-qPCR). The results show that mRNA levels of HOXA10 and HOXA11 taken prior to surgery and 4 months after the complete hysteroscopic removal of polyps were not significantly different (P=0.79 and P=0.14, respectively). Moreover, a marked difference could not be obtained between preoperative and postoperative endometrial LIF mRNA expression levels (P=0.86). As a conclusion, these results indicate that mRNA levels of HOXA10, HOXA11 and LIF genes, three of molecular markers of endometrial receptivity, are not affected by hysteroscopic polypectomy.
  • Küçük Resim Yok
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    A study of X-ray profile analysis of mixed layer clays
    (1991) Aksoy I.; Armagan N.
    Structural investigation by the X-ray diffraction method is discussed. As an example, an interstratified clay from Resadiye-Turkiye was investigated. The natural clay was identified as an interstratified montmorillonite-illite mineral. The chemical formula in the unit cell dimension was derived from chemical analysis and the theoretical intensity profile was adapted, in adjusting the parameters to fit to the experimental one. Finally, structural parameters resulted in the best 001 profile fit. -from Authors