ERZURUMLU İBRAHİM HAKKI’NIN TECVÎDÜ’L-ḲUR’ÂN Bİ LİSÂNİ’L-‘ARABÎ İSİMLİ RİSALESİ: TAHKİK VE TAHLİL

Murat Akkuş

Bu çalışmada 18. Yüzyılda 1703-1780 yılları arasında yaşamış, Türkçe, Arapça ve Farsça olmak üzere üç dilde birçok eser vermiş, Tillo’nun yetiştirmiş olduğu çok yönlü, büyük İslâm âlimlerinden Erzurumlu İbrahim Hakkı’nın (ö. 1194/1780) Tecvîdü’l-Ḳur’ân bi Lisâni’l-‘Arabî isimli risalesi ele alınmıştır. Harflerin mahreç ve sıfatlarına uymak suretiyle Kur’ân’ın güzel okunmasını öğreten tecvid ilmiyle ilgili olan risalenin Türkiye kütüphanelerinde tespit edilen sekiz adet el yazma nüshası bulunmaktadır. Nüshalardan üçü Erzurum’da yazılan Mecmû‘atü’l-me‘ânî’de, üçü ‘Urvetü’l-İslâm’da biri de Mecmû ...Daha fazlası

The Ni-deposited carbon felt as substrate for preparation of Pt-modified electrocatalysts: Application for alkaline water electrolysis

Ali Döner

A Ni-modified carbon felt (C) electrode (C/Ni) was used as a substrate for preparation of Ptmodified electrode in view of its possible application as electrocatalytic material for the hydrogen evolution activity. The prepared electrode was characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and cyclic voltammetry (CV) techniques. The hydrogen evolution activity of the electrode was assessed by cathodic currentepotential curves and electrochemical impedance spectroscopy (EIS) techniques. It was found that the modification of Ni-deposited C by loading ...Daha fazlası

Electrocatalytic behavior of the Pd-modified electrocatalyst for hydrogen evolution

Ali Döner

The hydrogen evolution behavior of C/CoSn, C/CoSnZn and C/CoSnZnePd catalysts which were prepared on a graphite substrate (C) by electrochemical deposition, as well as their electrochemical properties in the KOH solutions, have been investigated by the polarization measurements, cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and electrolysis techniques. C/CoSnZn catalyst was etched in caustic to leach out zinc and to produce the Raney-type, porous electrocatalytic surface for hydrogen evolution. In order to further improve the catalytic activity of the C/CoSnZn catalyst for t ...Daha fazlası

NiMn composite electrodes as cathode material for hydrogen evolution reaction in alkaline solution

Ali Döner

NiMn composite catalysts (C/NiMn, C/NiMnZn, C/NiMnZnePtRu and C/NiMnZnePtPd) have been prepared on the graphite substrate (C) by electrochemical deposition as electrocatalytic materials for hydrogen evolution reaction (HER). The NiMnZn coatings were etched in a concentrated alkaline solution (30% NaOH) to produce a porous and electrocatalytic surface suitable for the HER. After the leaching process, a low amount of binary PtPd and PtRu were deposited onto the etched NiMnZn deposit in order to improve the catalytic activity for the HER. Surface morphology and composition of the catalysts were a ...Daha fazlası

Electrocatalytic oxidation of methanol on Ru deposited NiZn catalyst at graphite in alkaline medium

Ali Döner

tThe methanol oxidation on C/NiZn-Ru electrode in a 1.00 M KOH and 1.00 M KOH + 1.00 M methanolsolutions at different scan rates and temperatures was studied by the cyclic voltammetry (CV), electro-chemical impedance spectroscopy (EIS) and chronoamperometry (CA) techniques. The graphite electrodeis coated in a nickel–zinc bath by electrodeposition for use as anode materials for methanol oxidationin alkaline solutions. It is etched in a concentrated alkaline solution to produce a porous and electrocat-alytic surface suitable for use in the methanol oxidation (C/NiZn). Ruthenium was electrodepos ...Daha fazlası

Inhibition Effect of Rhodanine-N-Acetic Acid on Copper Corrosion in Acidic Media

Ali Döner

The inhibition effect of Rhodanine-N-acetic acid (R-NA) on copper corrosion in acidic media is studied by using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and linear polarization resistance (LPR). The surface morphology is investigated by using scanning electron microscopy (SEM). The exposure of copper surface to 0.5 M H2SO4 solution in short and long immersion times in the absence and presence of the inhibitor is also examined. The results show that R-NA is a powerful inhibitor for copper corrosion in acidic media due to its strong adsorption onto the metal su ...Daha fazlası

Experimental studies of 2-pyridinecarbonitrile as corrosion inhibitor for mild steel in hydrochloric acid solution

Ali Döner

The effect of 2-Pyridinecarbonitrile (2-PCN) was studied on mild steel (MS) corrosion in 0.1 mol L1 HCl by electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR) and potentiodynamic polarization measurements. The surface morphologies of the MS were investigated in the inhibitor- free and in the presence of 10 mmol L1 2-PCN containing corrosive media, at 120 h exposure period by scanning electron microscopy (SEM). The mechanism of adsorption was determined from the potential of zero charge (Epzc). 2-PCN adsorption on the MS surface obeyed the isotherm of Langmuir a ...Daha fazlası

Hydrogen evolution stability of platinum modified graphite electrode

Ali Döner

A Platinum-modified alloy coating with high hydrogen evolution reaction (HER) durability activity was prepared by electrodeposition. The durability of this catalyst was determined with electrolysis technique for 120 h. The prepared electrode was characterized by energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM) and scanning electron microscopy (SEM). Long-term electrolysis was carried out in 1 M KOH solution by cathodic currentepotential curves and electrochemical impedance spectroscopy (EIS). Experimental result showed that CoZnePt coating has a rough structure and pre ...Daha fazlası

A novel, effective and low cost electrocatalyst for direct methanol fuel cells applications

Ali Döner

Electrocatalytic oxidation of methanol in alkaline solution on a NiCd/C catalyst chemically modified by a leaching process of Zn was investigated. Scanning electron microscopy (SEM), X-ray florescence spectroscopy (XRF) and atomic force microscopy (AFM) were used for coating characterization. The electrochemical properties and behaviors and also kinetic values of alkaline leached NiCdZn/C catalyst were characterized using cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). The electrocatalytic activity of the alkaline leached NiCdZn/C catalyst towa ...Daha fazlası

Enhancement of electrochemical activity of Raney-type NiZn coatings by modifying with PtRu binary deposits: Application for alkaline water electrolysis

Ali Döner

This study presents electrochemical preparation and characterization of PtRu-modified Cu/ Ni/NiZn electrodes (Cu/Ni/NiZnePtRu) as cathode materials for alkaline water electrolysis. The electrodes were characterized using energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Their electrochemical activities as cathode materials for alkaline water electrolysis were evaluated with the help of currentepotential curves. The results showed that the PtRu-modified layers have porous structures with relatively low Pt and Ru chemical compo ...Daha fazlası

The Influence of Nutritional Status and Sleep Quality on Gustatory Function in Older Adults

Elif Esra Öztürk

Associations Between Chronotype, Adherence to the Mediterranean Diet, and Attitude to Healthy Nutrition