Hayrettin Yücel

E-mail

hyuce@metu.edu.tr

Department

Department of Chemical Engineering

Short-term antimicrobial properties of mineral trioxide aggregate with incorporated silver-zeolite ODABAŞ, MESUT ENES; ÇINAR, ÇAĞDAŞ; AKCA, GÜLÇİN; Araz, Ibrahim; Ulusu, Tezer; Yücel, Hayrettin (2011-06-01) The purpose of this in vitro study was to determine whether adding silver-zeolite (SZ) to mineral trioxide aggregate (MTA) would enhance the antimicrobial activity of MTA against Staphylococcus aureus (ATCC #25923), Entero...
Antibacterial Effect of Silver-Zeolite Containing Root-Canal Filling Material ÇINAR, ÇAĞDAŞ; Ulusu, Tezer; ÖZÇELİK, BERRİN; Karamuftuoglu, Nevra; Yücel, Hayrettin (2009-08-01) The aim of this study was to determine the in vitro antibacterial effect of two experimental glass ionomer cements (GICs) on Streptococcus milleri, Staphylococcus aureus, and Enterococcus faecalis after 24 and 48 h incubat...
Effects of sulfonated polyether-etherketone (SPEEK) and composite membranes on the proton exchange membrane fuel cell (PEMFC) performance Sengul, Erce; Erdener, Huelya; Akay, R. Gueltekin; Yücel, Hayrettin; BAÇ, NURCAN; Eroglu, IncI (2009-05-01) Sulfonated polyether-etherketone (SPEEK) has a potential for proton exchange fuel cell applications. However, its conductivity and thermohydrolytic stability should be improved. In this study the proton conductivity was im...
Decolorization of sugar syrups using commercial and sugar beet pulp based activated carbons Mudoga, H. L.; Yücel, Hayrettin; Kincal, N. S. (2008-06-01) Sugar syrup decolorization was studied using two commercial and eight beet pulp based activated carbons. In an attempt to relate decolorizing performances to other characteristics, surface areas, pore volumes, bulk densiti...
Physical and chemical properties of selected Turkish lignites and their pyrolysis and gasification rates determined by thermogravimetric analysis Cakal, Gaye O.; Yücel, Hayrettin; Guruz, A. Guniz (2007-08-01) Pyrolysis and CO(2)-gasification behavior of lignites representing four different deposits in Turkey were investigated by Thermogravimetric Analysis (TGA) in the temperature range from 750 degrees C to 1000 degrees C. The ...
Crystallization field and rate study for the synthesis of ferrierite Gogebakan, Zuhal; Yücel, Hayrettin; Culfaz, Ali (2007-03-28) A partial crystallization field and rate study was performed for the synthesis of ferrierite from gels of variable composition: 1.85Na(2)O center dot Al2O3 center dot xSiO(2)center dot 592H(2)O center dot 19.7R, where R = ...
Removal of (137)Cs from aqueous solutions using different cationic forms of a natural zeolite: clinoptilolite Abusafa, A; Yücel, Hayrettin (2002-08-01) Distribution coefficients of cesium on natural and cation-enriched (Na(+), K(+), NH(4)(+) and Ca(+2)) forms of clinoptilolite were measured by batch, radioactive tracer technique. The measurements were carried out for an i...
Characterization of pore structure of Turkish coals Senel, IG; Guruz, A; Yücel, Hayrettin (2001-03-01) Pore structure of coal has a great influence on its behavior during mining, preparation, and utilization; Characterization of the pore structure of twelve Turkish coals from different geographic locations and with carbon c...

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