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Browsing Chemical Engineering / Kimya Mühendisliği by Author "Alsoy Altınkaya, Sacide"
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Catalytic performances of chemically immobilized urease under static and dynamic conditions: A comparative study
Yürekli, Yılmaz; Alsoy Altınkaya, Sacide (Elsevier, 2011-08)Immobilized urease has been used for direct removal of urea from aqueous solution and as biological sensing material in the preparation of urea biosensors. The former application is carried out under dynamic condition using ... -
Characterization of polysulfone based hemodialysis membranes by afm
Uz, Metin; Yaşar Mahlıçlı, Filiz; Polat, Mehmet; Alsoy Altınkaya, Sacide (Elsevier, 2012)Most of the hemodialysis membrane materials are hydrophobic in nature and allow protein adsorption on the surface easily due to hydrophobic interaction between membrane surface and protein molecules when in contact with ... -
Chitosan-polyoxometalate nanocomposites: Synthesis, characterization and application as antimicrobial agents
Fiorani, Giulia; Saoncella, Omar; Kaner, P.; Alsoy Altınkaya, Sacide; Figoli, Alberto; Bonchio, Marcella; Carraro, Mauro (Springer, 2014-05)Polyoxometalates (POMs) were used, together with chitosan (CS), to obtain hybrid nanoaggregates. Three representative POMs were efficiently assembled into nanoparticles of few hundred nm diameter, featuring entangled ribbons ... -
Development of a novel strategy for controlled release of lysozyme from whey protein isolate based active food packaging films
Pekşen Özer, Bahar Başak; Uz, Metin; Oymacı, Pelin; Alsoy Altınkaya, Sacide (Elsevier, 2016-12-01)The purpose of this study is to develop a novel controlled release system based on pH-responsive polyacrylic acid (PAA)/lysozyme (LYS) complexes incorporated within a hydrophilic whey protein isolate (WPI) film matrix for ... -
Development of antioxidant food packaging materials with controlled release properties
Gemili, Seyhun; Yemenicioğlu, Ahmet; Alsoy Altınkaya, Sacide (Elsevier, 2010-02)In this study, cellulose acetate (CA) films with different morphological features were prepared in order to control the release rates of low molecular weight natural antioxidants, L-ascorbic acid and L-tyrosine. Increasing ... -
Development of cellulose acetate based antimicrobial food packaging materials for controlled release of lysozyme
Gemili, Seyhun; Yemenicioğlu, Ahmet; Alsoy Altınkaya, Sacide (Elsevier, 2009-02)Antimicrobial packaging materials were obtained by incorporation of lysozyme into cellulose acetate (CA) films. In order to achieve controlled release of lysozyme, the structure of the films was changed from highly asymmetric ... -
Development of mono and multilayer antimicrobial food packaging materials for controlled release of potassium sorbate
Uz, Metin; Alsoy Altınkaya, Sacide (Elsevier, 2011-12)In this study, cellulose acetate (CA) based mono and multilayer films including potassium sorbate (Psb) as an antimicrobial agent were prepared using dry phase inversion technique. To achieve appropriate controlled release ... -
Effect of PEG grafting density and hydrodynamic volume on gold nanoparticle-cell interactions: an investigation on cell cycle, apoptosis, and DNA damage
Uz, Metin; Bulmuş, Volga; Alsoy Altınkaya, Sacide (American Chemical Society, 2016-06-14)In this study, interactions of polyethylene glycol (PEG)-coated gold nanoparticles (AuNPs) with cells were investigated with particular focus on the relationship between the PEG layer properties (conformation, grafting ... -
The effects of urease immobilization on the transport characteristics and protein adsorption capacity of cellulose acetate based hemodialysis membranes
Yaşar Mahlıçlı, Filiz; Alsoy Altınkaya, Sacide (Springer, 2009-10)In this study, cellulose acetate (CA) based hemodialysis membranes were prepared by a dry phase inversion method and the influences of urease immobilization on the clearing performance and protein adsorption capacity of ... -
Errors associated with swelling in the analysis of polymer-solvent diffusion measurements
Alsoy Altınkaya, Sacide (Elsevier, 2005-01)Sorption curves are generated from a mathematical model which includes the influence of the polymer swelling for unsteady-state sorption of a vapor or liquid by a polymer. To investigate the simultaneous effects of the ... -
Gelatin-based 3D conduits for transdifferentiation of mesenchymal stem cells into Schwann cell-like phenotypes
Uz, Metin; Büyüköz, Melda; Sharma, Anup D.; Sakaguchi, Donald S.; Alsoy Altınkaya, Sacide; Mallapragada, Surya K. (Elsevier, 2017-04)In this study, gelatin-based 3D conduits with three different microstructures (nanofibrous, macroporous and ladder-like) were fabricated for the first time via combined molding and thermally induced phase separation (TIPS) ... -
Immobilization of alpha lipoic acid onto polysulfone membranes to suppress hemodialysis induced oxidative stress
Yaşar Mahlıçlı, Filiz; Alsoy Altınkaya, Sacide (Elsevier, 2014-01)Alpha-lipoic acid (ALA) immobilized polysulfone (PSF) hemodialysis membranes have been fabricated by the dry-wet phase inversion technique. The antioxidant properties of the membranes were evaluated in terms of inhibition ... -
Immobilization of superoxide dismutase/catalase onto polysulfone membranes to suppress hemodialysis-induced oxidative stress: A comparison of two immobilization methods
Yaşar Mahlıçlı, Filiz; Şen, Yasin; Mutlu, Mehmet; Alsoy Altınkaya, Sacide (Elsevier, 2015-04-01)The objective of this study is to improve the blood compatibility of polysulfone (PSF) based hemodialysis membranes through generating antioxidative surfaces with superoxide dismutase (SOD)/catalase (CAT) enzyme couple ... -
Improvement of barrier and mechanical properties of whey protein isolate based food packaging films by incorporation of zein nanoparticles as a novel bionanocomposite
Oymacı, Pelin; Alsoy Altınkaya, Sacide (Elsevier, 2016-03-01)In this study, whey protein isolate (WPI) based bio-nanocomposite films embedded with zein nanoparticles (ZNP) were prepared by solution casting. Nanoparticles were coated with sodium caseinate to obtain a uniform distribution ... -
The influence of binder content on the water transport properties of waterborne acrylic paints
Alsoy Altınkaya, Sacide; Topçuoğlu, Özge; Yürekli, Yılmaz; Balköse, Devrim (Elsevier, 2010-12)Diffusion coefficients and sorption isotherms of water in waterborne acrylic paint films and in the pure binder of the paints have been measured by gravimetric sorption. Solubility of water was found to enhance with the ... -
Layer-by-layer surface modification of polyethersulfone membranes using polyelectrolytes and AgCl/TiO2 xerogels
Kaner, Papatya; Johnson, Daniel J.; Şeker, Erol; Hilal, Nidal; Alsoy Altınkaya, Sacide (Elsevier, 2015-11)In this study, the layer-by-layer (LbL) assembly method was employed to modify a commercial polyethersulfone (PES) membrane by successive adsorption of chitosan and alginate as cationic and anionic polyelectrolytes. To ... -
Measurement of ternary polymer/solvent equilibrium data by vapor-phase infrared spectroscopy
Yürekli, Yılmaz; Alsoy Altınkaya, Sacide (Elsevier, 2009-03)Vapor-liquid equilibrium (VLE) data for binary toluene/PVAC, methanol/PVAC and ternary toluene/methanol/PVAC systems have been measured at 100 °C by using vapor-phase infrared spectroscopy. Binary data have been compared ... -
Modeling of hemodialysis operation
Abacı, Hasan Erbil; Alsoy Altınkaya, Sacide (Springer, 2010-11)In this study, a theoretical model was developed to predict the solute concentrations in patients' blood and optimize the efficiency of the hemodialysis operation. The model takes into account simultaneous mass and momentum ... -
Nanofibrous gelatine scaffolds integrated with nerve growth factor-loaded alginate microspheres for brain tissue engineering
Büyüköz, Melda; Erdal, Esra; Alsoy Altınkaya, Sacide (Wiley, 2018-02)Neural regeneration research is designed in part to develop strategies for therapy after nerve damage due to injury or disease. In this study, a new gelatine-based biomimetic scaffold was fabricated for brain tissue ... -
Novel low-fouling membrane bioreactor (MBR) for industrial wastewater treatment
Deowan, Shamim Ahmed; Galiano, Francesco; Hoinkis, Jan; Johnson, Daniel; Alsoy Altınkaya, Sacide; Gabriele, Bartolo; Hilal, Nidal; Drioli, Enrico; Figoli, Alberto (Elsevier, 2016-07)A novel antifouling coating of ultrafiltration (UF) commercial membranes, based on a polymerisable bicontinuous microemulsion (PBM) technique, was developed and tested for the first time in a membrane bioreactor (MBR) using ...
