Browsing by Author "Yildiz, A."

Now showing 1 - 6 of 6

Adsorption of Aniline, Phenol, and Chlorophenols on Pure and Modified Bentonite
(Maik Nauka/interperiodica/springer, 2006) Yildiz, A.; Gur, A.; Ceylan, H.
In the present study, pure bentonite and bentonite modified by HNO 3, EDTA, and HDTMA are adsorbents. The changes on the surfaces of bentonite samples are studied by IR spectroscopy. The adsorption of aniline, phenol, and phenol derivatives on these adsorbents is examined by means of gas chromatography. As the result of these examinations, it is seen that the adsorption capacities of clay-organic complexes (bentonite - EDTA and bentonite-HDTMA) are higher than those of bentonite-HNO3 and pure bentonite.
Adsorption of Phenol and Chlorophenols on Pure and Modified Sepiolite
(Serbian Chemical Soc, 2007) Yildiz, A.; Gur, A.
In this work, pure sepiolite and sepiolite modified by nitric acid (HNO3), ethylenediaminetetraacetic acid (EDTA) and hexadecyltrimethylammonium (HDTMA) were used ad adsorbents. The changes on the surface were studied by IR spectroscopy, The adsorption of solutions of phenol and phenol derivatives in pure ethanol oil these adsorbents were examined by means of gas chromatography. It was found that the adsorption capacities of the clay-organic complexes (sepiolite-EDTA and sepiolite HDTMA) were higher than those of pure sepiolite and sepiolite-HNO3.
Adsorption of Phenol and Phenol Derivatives on Pure and Modified Kaolinite
(Mrs Pushpa Agarwal, 2006) Yildiz, A.; Gur, A.
In the present work, pure kaolinite and that modified by HNO3, EDTA and HDTMA, were used as the adsorbents. The changes on the surfaces were studied by IR spectroscopy. The adsorption of solutions of phenol and phenol derivatives in alcohol on these adsorbents was examined by means of gas-chromatography. As a result of these examinations, it was seen that the adsorption capacities of the clay-organic complexes (kaolinite-EDTA and kaolinite-HDTMA) were higher than pure kaolinite and kaolinite-HNO3.
Crossed Testicular Ectopia: Report of Six Cases
(Medknow Publications, 2014) Akin, M.; Erginel, B.; Bilici, S.; Gedik, S.; Yildiz, A.; Karadaǧ, C.A.; Dokucu, A.I.
Crossed testicular ectopia or transverse testicular ectopia is an extremely rare anomaly characterised by migration of one testis towards the opposite inguinal canal, usually associated with unilateral inguinal hernia. This report describes six cases of crossed ectopic testes, one of the largest series, and with unusual clinical histories. © 2014 African Journal of Paediatric Surgery. All rights reserved.
Dissolution and Mechanism of Tincal in Ammonium Carbonate Solutions
(Chemical Publishing Co., 2010) Yildiz, A.; Nas, M.S.; Kubilay, S.; Yilmaz, S.
In this paper the dissolution and mechanism of tincal, sodium tetraborate decahydrate (Na2B4O710H2O), in ammonium carbonate solutions using the effects parameters of reaction temperature, solution concentration, solid to liquid ratio, particle size and stirring speed. The results showed that the dissolution rate increased with increasing solution concentration and reaction temperature and increased with decreasing particle size and solid to liquid ratio. It was also determined that stirring speed exerted no significant effect on dissolution rate.
Dissolution Kinetics of Calcined Ulexite in Ammonium Chloride Solutions
(Mrs Pushpa Agarwal, 2006) Gur, A.; Yildiz, A.; Ceylan, H.
In this study, the leaching kinetics of calcined ulexite in ammonium chloride solutions were investigated. The effect of calcination temperature, solution concentration, reaction temperature and prehydration were chosen as parameters. It was observed that the rate of dissolution increased with increasing calcination temperature, solution concentration and reaction temperature, while it was not affected by prehydration. Employing graphical and statistical methods, the dissolution rate, based on homogeneous reaction model, can be shown as: (1 - X)(-1) - 1 = k(NH4Cl)(4/5). The activation energy for the dissolution of the ulexite sample calcined at 160 degrees C was found to be 62.65 kJ mol(-1).