Browsing by Author "Kara, Derya"
Now showing items 1-20 of 61
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2-Acetyl-3-methyl-4H-1,4-benzothiazine: a redetermination at 100 K
Kara, Hülya; Kara, Derya; Aşkun, Tülin; Yahşi, Yasemin; Büyükgüngör, Orhan (Wiley-Blackwell,, 2006)The structure of the title compound, C11H11NOS, has been reported previously at room temperature by Ferguson & Ruhl [Cryst. Struct. Commun. (1982), 11, 1033-1038]. We report here a redetermination, at 100 (2) K, with ... -
Assessment of sequential extraction methods for the prediction of bioavailability of elements in plants grown on agricultural soils near to boron mines in Turkey
Alan, Mesut; Kara, Derya (Elsevier Science BV, 2019)Two sequential extraction methods (BCR sequential extraction method and a newly proposed sequential extraction method) were used to evaluate the bioavailability of the elements from the contaminated soils to different ... -
Balya ilçesi ve yakın köylerindeki toprak kirliliğinin çocuklar üzerine etkisinin in vitro gastrointestinal ekstraksiyon yöntemi ile belirlenmesi
Karadaş, Cennet (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2008)Bu çalışmanın ilk kısmında, Balıkesir'in Balya ilçesi ve yakın köylerinden alınan topraklarda bazı metallerin toplam konsantrasyonları ve toprakların farklı fazlarındaki metal konsantrasyonları belirlenmiştir. Toprakların ... -
Bazı metal katyonlarının N,N'-bis(2-hidroksi-5-bromo-benzil)1,2-diaminopropan ile çözücü ekstraksiyonu ve uygulamaları
Kara, Derya (2001)Çözücü ekstraksiyonu, bir çözeltinin (genellikle sulu) ikinci bir çözücü (genellikle organik) ile temas ettirilerek bir yada daha çok çözünenin ikinci çözücüye transferi olarak tanımlanmaktadır. Çözücü ekstraksiyonu ... -
Chemically modified silica gel with n-(2-aminoethyl)-salicylaldimine for simultaneous solid phase extraction and preconcentration of Cu(ii), Ni(ii), Cd(ii) and Zn(ii) in waters
Özçelik, Gülşah; İmamoğlu, Mustafa; Yıldız, Salih Zeki; Kara, Derya (Springer, 2012)In this study, N-(2-aminoethyl)salicylaldimine bonded silica gel was synthesized and characterized using Fourier transform infrared and C, H, N elemental analysis. The analytical conditions such as the pH and volume of the ... -
Chemometric approach to evaluate trace metal concentrations in some spices and herbs
Karadaş, Cennet; Kara, Derya (Elsevier Sci Ltd, 2012)Herbs (mint, thyme and rosemary) and spices (black pepper, chili pepper, cinnamon, cumin, sweet red pepper and turmeric) were analysed using atomic spectrometry and then subjected to chemometric evaluation in an attempt ... -
Chemometric evaluation for the relation of BCR sequential extraction method and in vitro gastro-intestinal method for the assessment of metal bioavailability in contaminated soils in Turkey
Karadaş, Cennet; Kara, Derya (Springer Heidelberg, 2012)A chemometric evaluation has been done to classify metal ions in soils and to determine whether or not the gastric and intestinal phases of a physiologically based extraction test bear any relation to any of the phases of ... -
Comparison of a new sequential extraction method and the BCR sequential extraction method for mobility assessment of elements around boron mines in Turkey
Alan, Mesut; Kara, Derya (Elsevier Science BV, 2019)The mobility of As, B, Ba, Cd, Co, Cr, Cu, Ni, Pb and Zn in the soils collected from fields near boron mines was investigated using a new sequential extraction method and the BCR sequential extraction methods. The new ... -
Comparison of some newly synthesized chemically modified Amberlite XAD-4 resins for the preconcentration and determination of trace elements by flow injection inductively coupled plasma-mass spectrometry (ICP-MS)
Kara, Derya; Fisher, Andrew; Hill, Steve J. (Royal Soc Chemistry, 2006)XAD copolymer resins may be functionalized with heavy metal ion-selective ligands either by covalent linkage to the polymer backbone or by impregnation. These resins may be tailored to be specific for certain heavy metals ... -
Copper extraction from aqueous solution by pentaerythrityl tetrabenzylamine
Kara, Derya; Alkan, Mahir; Çakır, Ümit (2001)The extraction of copper(II) from the aqueous phase with pentaerythrityl tetrabenzylamine (PETBA), which was synthesized from pentaerythrityl tetrabromide and benzyl amine, was studied. The influences of ionic strength, ... -
Detergent less ultrasound-assisted extraction of trace elements from edible oils using lipase as an extractant
Kara, Derya; Fisher, Andrew; Hill, Steve (Elsevier Science BV, 2015)A new method for the extraction and preconcentration of trace elements (Al, Ba, Cd, Cu, Fe, Mn, Mo, Ni, Ti, V and Zn) from edible oils by producing detergentless micro-emulsions via an ultrasound-assisted extraction using ... -
Determination and evaluation of element bioaccessibility in some nuts and seeds by in-vitro gastro-intestinal method
Kafaoğlu, Burcu; Fisher, Andrew; Hill, Steve; Kara, Derya (Determination and evaluation of element bioaccessibility in some nuts and seeds by in-vitro gastro-intestinal method, 2016)Element bioaccessibility in some nuts and seeds has been determined by performing a physiologically based extraction test. Nine elements (B, Ca, Co, Cu, Fe, Mn, Mg, Ni and Zn) in gastric and intestinal phase extractions ... -
Determination of acidity constants of acid-base indicators by second-derivative spectrophotometry
Kara, Derya; Alkan, Mahir (Pergamon-Elsevier Science Ltd, 2000)A method for calculation of acid-base dissociation constants of monoprotic weak organic acids whose acid and base species have overlapping spectra from absorptiometric and pH measurements is described. It has been shown ... -
Determination of copper(II) in natural waters by extraction using n-o-vanillidine-2-amino-p-cresol and flame atomic absorption spectrometry
Karadaş, Cennet; Kara, Derya (Taylor & Francis Inc, 2014)A simple and accurate solvent extraction method was developed for the separation and preconcentration of trace levels of copper(II) in water using N-o-vanillidine-2-amino-p-cresol prior to its determination using flame ... -
Determination of gallium at trace levels using a spectrofluorimetric method in synthetic u-ga and ga-as solutions
Kara, Derya; Fisher, Andrew; Foulkes, Mike; Hill, Steve J. (Pergamon-Elsevier Science Ltd, 2010)A simple, easy to use and selective spectrofluorimetric method for the determination of trace levels of gallium has been developed. A new Schiff base, N-o-vanillidine-2-amino-p-cresol (OVAC) was synthesized and its ... -
Determination of Rare Earth Elements by Solid Phase Extraction Using Chemically Modified Amberlite XAD-4 Resin and Inductively Coupled Plasma-Optical Emission Spectrometry
Karadaş, Cennet; Kara, Derya (Sprınger, 2014)A new solid phase extraction method was developed for the preconcentration and determination of the rare earth elements (REEs) Pr, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb, and Lu at trace levels using a mini-column packed with ... -
Determination of rare earth elements in natural water samples - A review of sample separation, preconcentration and direct methodologies
Fisher, Andrew; Kara, Derya (Elsevier Science Bv, 2016)This review discusses and compares the methods given for the determination of rare earth elements (REE) in natural water samples, including sea, river, lake, tap, ground and waste waters as well as Antarctic ice. Since REE ... -
Determination of rare earth elements in seawater by inductively coupled plasma mass spectrometry with off-line column preconcentration using 2,6-diacetylpyridine functionalized Amber lite XAD-4
Karadaş, Cennet; Kara, Derya; Fisher, Andrew (Elsevier Science Bv, 2011)An off-line column preconcentration technique using a micro-column of 2,6 diacetylpyridine functionalized Amberlite XAD-4 with inductively coupled plasma mass spectrometry (ICP-MS) as a means of detection has been developed. ... -
Determination of rare earth elements in waters by inductively coupled plasma optical emission spectrometry after preconcentration with 6-(2-thienyl)-2-pyridinecarboxaldehyde functionalized Amberlite XAD-4 resin
Karadaş, Cennet; Kara, Derya (Iwa Publishing, 2014)A new method has been developed for the determination of rare earth elements (REEs) (Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) in water samples based on preconcentration with a mini-column packed with ... -
Determination of trace heavy metals in soil and sediments by atomic spectrometry following preconcentration with schiff bases on amberlite xad-4
Kara, Derya; Fisher, Andrew; Hill, Steve J. (Elsevier Science Bv, 2009)A matrix separation and analyte preconcentration system using Amberlite XAD copolymer resins functionalized by Schiff base reactions coupled with atomic spectrometry has been developed. Three different functionalized ...
