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• Akça, Erhan(1)
• Alsaran, A.(1)
• Bayrak, O.(1)
• Berberoglu, Suha(1)
• Billor, Zeki(1)
• Casati, Enrico(1)
• Celik, A.(1)
• Dönmez, Cenk(1)
• Eren, Muhsin(1)
• Hacisalihoglu, I.(1)
• Kadir, Selahattin(1)
• Kapur, Selim(1)
• Karagöz, Alptekin(1)
• Karaman, I.(1)
• Madrau, Salvatore(1)
• Nazik, Atike(1)
• Polat, Osman(1)
• Previtali, Franco(1)
• Purcek, G.(1)
• Vangolu, Y.(1)
• Yegingil, Zehra(1)
• Zoroglu, Levent(1)
• Zucca, Claudio(1)
• Çilek, Ahmet(1)
• Özberk, Irfan(1)

• MakaleAçık Erişim2025Scopus SJRQ1/r/gumushane/10671
  Pedogenic evidence sheds light on the post-Roman pedo-sedimentological and human history of Tarsus, the Roman capital of CE 60, Cilicia, Mersin, Türkiye

  Kapur, Selim; Akça, Erhan; Kadir, Selahattin; Previtali, Franco; Billor, Zeki; Zucca, Claudio; Casati, Enrico; Eren, Muhsin; Karagöz, Alptekin; Nazik, Atike

  The ancient city of Tarsus is underlying a sediment of 400 cm where the contemporary Tarsus grew. The diffusely stratified layers of the deposited sediment from the Kydnos (Tarsus) river overlying the Roman Road excavation site located in the heart of the modern city. The sediment is laden with technogenic materials. The profile of the stratigraphic layers represents a Pedocomplex (PDC) and its horizons are the Pedomembers (PDMs). All the PDMs were described and sampled for physical, chemical, mineralogical, micromorphological, and thermoluminescense analyses seeking pedogenic evidences. The origin of PDC materials is a fluvial and/or lagoon environment (archaeologically predicted date, about 60 CE, and they are calcareous, high in available P and some are high in total phosphorus contents). They have been partially modified by human activity in a settlement area, thus bringing some historical evidence suggesting that the site was part of the growing city after its abandonment. Thin sections show a vigorous biological degradation of the organic residues in the PDMs along with occasional evidence of soil-forming processes. The preliminary conclusions were extracted from the results obtained through the newly formed hydroxyapatite (Hap) determined by micromorphology, therefore proposing the new suffix pi for the WRB soil naming system. Primary, high temperature and clay minerals together with TL analyses of the layers, were conducted to reveal the provenance and weathering phases of the horizons. The seeds recovered from an inhabited layer helped to interpret the food and medicinal habits of the local society and the contemporary presence of the lagoon.

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• BildiriYalnız künye2011Scopus SJRQ1/r/gumushane/10448
  Hydroxyapatite production on ultrafine-grained pure titanium by micro-arc oxidation and hydrothermal treatment

  Alsaran, A.; Purcek, G.; Hacisalihoglu, I.; Vangolu, Y.; Bayrak, O.; Karaman, I.; Celik, A.

  In this study, pure-Ti (Grade-2) was severely plastically deformed by equal-channel angular extrusion (ECAE) to improve its strength, and then subjected to micro arc oxidation (MAO) and hydrothermal treatment (HT) to achieve improved surface behavior with hydroxyapatite (HA)-containing titania (TiO(2)) coating. Microstructure, tensile properties and wear behavior of UFG Ti were investigated systematically before and after surface modification. ECAE considerably enhanced the strength of coarse-grained (CG) Ti by forming an ultra-fine grained (UFG) microstructure with high dislocation density. The application of MAO with or without HT did not cause remarkable decrease in strength and ductility of CG and UFG Ti, but resulted in a considerable increase in its wear resistance and osseointegration due to the formation of hard and adhered HA-containing TiO2 coating on the surface. It can be concluded that the use of ECAE plus MAO/HA coating provides a simple and effective procedure to obtain pure Ti with high strength and high wear resistance. The improved bulk and surface properties can make this biocompatible material a good potential candidate for biomedical applications instead of alloys including toxic elements. (C) 2011 Elsevier B.V. All rights reserved.

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  AtıfScopus61·WoS61·OpenAlex65

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