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Publication Metadata only Investigation of adsorption of 5-Chlorouracil onto montmorillonite: An IR and Raman spectroscopic study(Elsevier, 2018-11) AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; 10127In this study, the adsorption of 5-Chlorouracil (5-ClU) on natural montmorillonite from Anatolia was investigated using FT-IR and Raman spectroscopy. The 5-ClU is a thymine antagonist and has some antitumor properties. The comparison of the vibrational spectra of the adsorbed 5-ClU with those of the free molecule provided data on the nature and characteristics of the clay organic complexes. The intercalation of 5-ClU within montmorillonite has been shown by X-ray diffraction to increase the interlayer spacing. Vibrational spectroscopy indicates that adsorbed 5-ClU molecules on montmorillonite are coordinated to exchangeable cations, directly or indirectly through water bridges.Publication Metadata only Elemental and spectroscopic characterization of plasters from Fatih Mosque-Istanbul (Turkey) by combined micro-Raman, FTIR and EDXRF techniques(Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1Gb, England, 2015-10-05) Güleç, Ahmet; AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; 10127The characterization of the plasters and coloring agents of the wall paintings of Fatih Mosque have been performed using combined micro-Raman, FTIR and EDXRF techniques. The investigations show that the plaster used on the walls has mixed gypsum lime binders. Cinnabar {HgS}, lead red {Pb3O4} and hematite {alpha-Fe2O3} were identified in the red surfaces. Blue color is attributed to ultramarine blue {Na8-10Al6Si6O24S2-4}. Green color is assigned to mixtures of green earth, copper phthalocyanine {Cu(C32Cl16N8)} and brochantite {CuSO4 center dot 3Cu(OH)(2)}. Strontium yellow {SrCrO4} and zinc white {ZnO} were also used to ensure the color tone. The results provide a basis for future restoration of wall paints. (C) 2015 Elsevier B.V. All rights reserved.Publication Metadata only FTIR and EDXRF ınvestigations of the second generations of salt tolerant soybean mutants(2012-08) AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; ATAK, ÇİMEN; ÇELİK, ÖZGE; 10127; 113987; 6653Publication Metadata only 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 Metadata only Investigations on Empire series postage stamps of Ottomans (printed 1880-1890) by vibrational spectroscopic and energy dispersive X-ray fluorescence techniques(Elsevier Science Bv, Po Box 211, 1000 AE Amsterdam, Netherlands, 2017-03) AKYÜZ, SEVİM; AKYÜZ, ZEKİ TANIL; 10127In this study Empire series of stamps, the first postage stamps of Ottomans (printed in 1880-1890) after the Ottoman Empire became a member of Universal Postal Union, have been analyzed for the first time, non-destructively, using Fourier-transform infrared (FTIR), Raman and energy dispersive X-ray fluorescence (EDXRF) spectrometry methods Lead chromate, Prussian blue, vermillion, calcium carbonate, gypsum, cellulose, and oil were identified. The merging of data coming from vibrational spectroscopy and EDXRF techniques has allowed the characterization of the pigments used on the surface of each stamp and dispersed between the paper fibers. Additionally, the paper of the stamps was also analyzed. (C) 2017 Elsevier B.V. All rights reserved.