Fizik Bölümü / Department of Physics
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Browsing Fizik Bölümü / Department of Physics by Publisher "ASIAN JOURNAL OF CHEMISTRY, 11/100 RAJENDRA NAGAR, SECTOR 3,, SAHIBABAD 201 005, GHAZIABAD, INDIA"
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Publication Adsorption and interaction of 2-aminopyridine with loughlinite (Na-sepiolite) from Anatolia(ASIAN JOURNAL OF CHEMISTRY, 11/100 RAJENDRA NAGAR, SECTOR 3,, SAHIBABAD 201 005, GHAZIABAD, INDIA, 2008-06) AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; TR10127; TR111424FT-IR spectroscopy has been used to characterize adsorption and interaction of 2-aminopyridine by loughlinite, which belongs to palygorskite-sepiolite group of phyllosilicates class of clay minerals. The spectroscopic results indicate generation of 2-aminopyridinium cations. Cationic and neutral surface species adsorbed on loughlinite are coordinated to Bronsted acidic sites and surface hydroxyls (by H-bonding interaction through pyridine ring nitrogen lone pairs), respectively. It must be noted that the adsorption of 2-aminopyridine affected the hydroxyl group vibrations of loughlinite.Publication Determinatino of Elemental Concentrations in Fish and Sediments From Rize-Ardesen area of The East Black Sea(ASIAN JOURNAL OF CHEMISTRY, 11/100 RAJENDRA NAGAR, SECTOR 3,, SAHIBABAD 201 005, GHAZIABAD, INDIA, 2008-06) AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; TR111424; TR10127Some elemental concentrations (K, Ca, Cr, Mn, Fe, Cu, Ni, Zn, Br, Cd, Rb, Sr, Ba, Cs, Zr, Sb, Pb,) of 7 fish species (anchovy, red mullet, grey mullet, sea pike, horse mackerel, whiting and sea-bream), which are largely consumed by human, together with two surface sediment samples from Rize-Ardesen area of the Turkish coast of the east Black Sea have been analyzed by EDXRF spectrometry. Pb was only detected in horse mackerel (2.1 mg/kg) among the muscles of fish species. The results indicated that Mn, Fe, Ni, Cu, Zn and Br were more concentrated in the livers of the fish samples than in muscles, whereas Rb, Sr and Zr concentrations were lower in livers than that in muscles. A positive correlation was found between concentrations of Zn, Cu, Ni and Pb in the sediment and in fish species. The analysis results of the fish samples are compared with those of other marine environment.Publication FT-IR, EDXRF analysis of the Mardin-Mazidag phosphate deposit of Turkey and relations between phosphate, uranium and fluorine(ASIAN JOURNAL OF CHEMISTRY, 11/100 RAJENDRA NAGAR, SECTOR 3,, SAHIBABAD 201 005, GHAZIABAD, INDIA, 2008-06) Çağlar, Hikmet; Çağlar, Nazan; AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; TR111424; TR10127; TR114368; TR110809EDXRF and FT-IR spectral analyses of the composite sample of Mardin-Mazidag phosphate deposit, in which the main phosphate mineral has been known to be collophane and dahllite, were reported. Uranium, phosphate and fluorine contents of the 25 individual phosphate samples were analyzed by EDXRF (U and P) and wet chemical methods (F). Quadratic regression model were applied on the U, P and F analyses results, in order to show the interrelation between phosphate, uranium and fluorine contents.Publication Neutron Activation Analysis of the Metals From Ancient Coins Dating Back to Roman Age(ASIAN JOURNAL OF CHEMISTRY, 11/100 RAJENDRA NAGAR, SECTOR 3,, SAHIBABAD 201 005, GHAZIABAD, INDIA, 2007-06) Mukhamedshina, N.; Başaran, S.; Mirsagatova, A. A.; Bolcal, Ertuğrul Cem; Güleç, A.; AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; TR10127; TR111424; TR111950Concentration levels of various elements have been estimated in ancient coins dating back to Roman age, which have been found in a sewage system of the ancient Ainos (Enez, Turkey). The coins are distributed into two groups on the basis of elemental composition: Pb and Cu based or Fe and Mn based coins indicating that two different ore deposits were used for issuing these coins. Other minor elements present in varying proportions are Ca, As and n. Besides to these major and minor elements, the coins,,were found to contain Na, K, Sc, Cr, Co, Ni, Zn, Br, Ag, Sb, Ba, An as impurities.