Yazar "Metin, Ayşegül Ülkü" için listeleme
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Chitosan based metal-chelated copolymer nanoparticles: Laccase immobilization and phenol degradation studies
Alver, Erol; Metin, Ayşegül Ülkü (Elsevier Ltd, 2017)Immobilization improves the stability and reusability of enzymes. In this study, laccase, which is a green biocatalyst, was immobilized onto Cu (II)-chelated chitosan nanoparticles via adsorption and successfully applied ... -
Efficient removal of acidic dye using low-cost biocomposite beads
Metin, Ayşegül Ülkü; Çiftçi, Hakan; Alver, Erol (2013)The objective of this study is to prepare and characterize chitosan/zeolite biocomposite beads and utilize them as adsorbent for removal of anionic dye, Acid Black 194 (AB194). Characterization studies of biocomposite beads ... -
Electrochemical copper (II) sensor based on chitosan covered gold nanoparticles
Çiftçi, Hakan; Tamer, Uğur; Metin, Ayşegül Ülkü; Alver, Erol; Kizir, Nevin (Kluwer Academic Publishers, 2014)This study outlines a new sensing platform based on glassy carbon electrodes modified by gold nanoparticles (AuNPs) for the determination of heavy metal. A glassy carbon electrode was modified by chitosan stabilized AuNPs. ... -
Fabrication and characterization of gold-nanoparticles/chitosan film: A scaffold for L929-fibroblasts
The objective of the present study was to fabricate a gold nanoparticle crosslinked chitosan (Ch/AuNPs) composite film simple and to evaluate its use as a carrier matrix for L929- fibroblasts. L929- fibroblasts were seeded ... -
Fibrous polymer-grafted chitosan/clay composite beads as a carrier for immobilization of papain and its usability for mercury elimination
Metin, Ayşegül Ülkü; Alver, Erol (Springer Verlag, 2016)Papain, which is an industrially important enzyme, has been immobilized on fibrous polymer-modified composite beads, namely poly(methacrylic acid)-grafted chitosan/clay. Characterization studies have been done using FTIR ... -
Mechanical and thermal properties of recycled polyethylene/surface treated hemp fiber bio-composites
Güney, Olcay; Bilici, İbrahim; Doğan, Deniz; Metin, Ayşegül Ülkü (Wiley-Blackwell, 2023)Hemp is a good option for polyethylene additives because of its high cellulose and fibrous content. This study aims to modify natural hemp fibers with the maleic anhydride/ionic liquid method, manufacture the composites, ... -
Non-enzymatic sensing of glucose using a glassy carbon electrode modified with gold nanoparticles coated with polyethyleneimine and 3-aminophenylboronic acid
Çiftçi, Hakan; Alver, Erol; Çelik, Filiz; Metin, Ayşegül Ülkü; Tamer, Uğur (Springer-Verlag Wien, 2016)A non-enzymatic electrochemical method was developed for sensing glucose by using a glassy carbon electrode modified with 3-aminophenylboronic acid (APBA) immobilized on polyethyleneimine (PEI)-coated gold nanoparticles. ... -
One step effective removal of Congo Red in chitosan nanoparticles by encapsulation
Alver, Erol; Bulut, Mehmet; Metin, Ayşegül Ülkü; Çiftçi, Hakan (Elsevier B.V., 2017)Chitosan nanoparticles (CNPs) were prepared with ionotropic gelation between chitosan and tripolyphosphate for the removal of Congo Red. The production of chitosan nanoparticles and the dye removal process was carried out ... -
Preparation of a novel functionalized magnetic nanobiocomposite as a carrier for protein adsorption
Metin, Ayşegül Ülkü; Doğan, Mustafa; Erdem, Ümit; Babacan, Taner; Güngüneş, Hakan (Taylor & Francis Inc, 2020)This study aims the synthesis of a novel functionalized magnetic nanocarrier based on xanthan gum biopolymer. Glycidyl methacrylate was grafted on xanthan gum chains by radical polymerization reaction using two types of ... -
Resorbable membrane design: In vitro characterization of silver doped-hydroxyapatite-reinforced XG/PEI semi-IPN composite
Doğan, Deniz; Erdem, Ümit; Moran Bozer, Büşra; Türköz, Mustafa Burak; Yıldırım, Gürcan; Metin, Ayşegül Ülkü (ELSEVIER, 2023)In this study, the production and characterization of silver-doped hydroxyapatite (AgHA) reinforced Xanthan gum (XG) and Polyethyleneimine (PEI) reinforced semi-interpenetrating polymer network (IPN) biocomposite, known ... -
Spectral analysis and biological activity assessment of silver doped hydroxyapatite
Erdem, Ümit; Moran Bozer, Büşra; Türköz, Mustafa B.; Metin, Ayşegül Ülkü; Yıldırım, Gürcan; Türk, Mustafa; Nezir, Saffet (Taylor and Francis Ltd., 2021)In this study, the hydroxyapatite biomaterials are produced by the precipitation method and the role of silver doping within the different molar ratios of 2.0, 5.0, and 10.0% are investigated with some fundamental analysis, ... -
Synthesis and Characterization of Chitosan/Polyvinylpyrrolidone/Zeolite Composite by Solution Blending Method
Alver, Erol; Metin, Ayşegül Ülkü; Çiftçi, Hakan (Springer New York LLC, 2014)Polymer/clay composites have been studied for several decades; in the study, polymer/zeolite composite beads have been prepared by a simple solution blending method using chitosan, polyvinylpyrrolidone and zeolite particles ...
