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Investigation on Effects of Schiff Base Complex to Hydroxyapatite Bioceramics

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Çalışkan F., Tuna M., Akça S.
Acta Physica Polonica A
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2015
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vol. 127
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issue 4
1393-1396
EN
The aim of this study was to evaluate the effects of Schiff base metal complex on the bio-compatible hydroxyapatite (HAp) ceramics. The reason for that was to produce, as the final product, the HAp in powder form, with extraordinary features like analgesic, antibacterial properties. This effect was provided by doping HAp powder with some Schiff base complexes during the powder extraction process. Schiff base complex used in the study was synthesized by condensation of primary amines with carbonyl compounds. The chemical structures of the synthesized compounds were confirmed by means of infrared (IR) spectroscopy and elemental analysis. Characterizations of the extracted HAp powders were carried out by using scanning electron microscopy for surface analysis and EDS analysis, X-ray diffraction for phase determination and grain size distribution. The bactericide effects of Zn SAE-added pure HAp were tested on E.Coli bacteria for the content range of 0-7 wt.% of Zn-SAE. Consequently, bacterial activity of the calcium phosphate resulting powders was evolved by adding the Zn SAE Schiff base complex.
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Semi-Empirical Formula with New Coefficients of the (α,n) Reaction Cross-Section

100%
Akça S., Tel E., Güngör S.
Acta Physica Polonica A
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2015
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vol. 128
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issue 2B
B-128-B-131
EN
A new modified semi-empirical formula including non-elastic scattering and Coulomb effects for the (α,n) reaction cross-section was obtained. The available experimental data were used to get the (α,n) reaction cross-section systematics. The dependence between the cross-section and asymmetry term was discussed for (α,n) reaction at 18.5±3 MeV energies classifying the target nuclei into odd Z-even N and even Z-even N. The coefficients of determination (R²) for all classifications were detected to exhibit the amount of relation between asymmetry term and cross-sections obtained from the modified semi-empirical formula with new coefficients.
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