Browsing by ABU Author "Demirel Topel, Seda"
Now showing items 1-18 of 18
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Bodipy photosensitizer linked hybrid nanomaterials for photodynamic therapy
Kostak, Feyza; Kerbouche, Omar; Pehlivanoglu, Suray; Demirel Topel, Seda (Advanced Nanomaterials Congress, 2021)Photodynamic therapy (PDT) is an alternative clinically approved treatment method to obliterate the cancerous lesion by producing reactive oxygen species (ROS) via activated photosensitizer (PS) molecule at a certain ... -
Cellulose acetate encapsulated upconversion nanoparticles – a novel theranostic platform
Demirel Topel, Seda; Balcioglu, Sevgi; Ateş, Burhan; Asilturk, Meltem; Topel, Önder; Ericson, Marica B. (Materials Today Communications, 2021)Luminescent upconversion nanoparticles (UCNPs) are of great interest in a wide range of nanotechnological applications, particularly in the biomedical area like imaging and therapy but their biocompatibility and stability ... -
Construction of a miniaturized monosaccharide detection system based on measuring electric current and testing its performance using a bodipy fluorescent dye
Kerbouche, Omar; Beyaz, Mustafa İlker; Demirel Topel, Seda (Multidisciplinary Digital Publishing Institute (MDPI), 2023)In this study, a low-cost, miniaturized fluorescence-based measurement system for optical biosensors has been developed. A 3D-printed setup with a blue light-emitting diode (LED) and photodiode was used for electrical ... -
Encapsulation of diiodo-BODIPY in sodium dodecyl sulfate stabilized cellulose acetate capsules for enhanced singlet oxygen production in aqueous solution
Demirel Topel, Seda (Wiley, 2023)As drug delivery vehicles, polymeric capsules have become highly versatile structures to protect the active substrate from degradation, improve biocompatibility, and provide controlled release. In particular, encapsulation ... -
Enhancement of enzyme activity by laser-induced energy propulsion of upconverting nanoparticles under near-infrared light: A comprehensive methodology for in vitro and in vivo applications
Ateş, Burhan; Ulu, Ahmet; Asiltürk, Meltem; Noma, Samir Abbas Ali; Demirel Topel, Seda; Dik, Gamze; Özhan, Onural; Bakar, Büşra; Yıldız, Azibe; Vardı, Nigar; Parlakpınar, Hakan (Elsevier, 2024)If the appropriate immobilization method and carrier support are not selected, partial decreases in the activity of enzymes may occur after immobilization. Herein, to overcome this challenge, an excitation mechanism that ... -
Enhancing the stability of nanotheranostic systems
Demirel Topel, Seda (5th International Conference on Nanomedicine and Nanotechnology, 2021)Theranostics is new term which defined as a combination of therapy and diagnosis to establish a targeted drug delivery and monitoring of treatment into a single nanosystem. The most important parameter in the theranostic ... -
Exploring the photocatalytic and photodynamic effects of BODIPY-linked titanium dioxide nanoparticles
Seda Demirel Topel (TUBITAK, 2023)This study aimed to investigate the photocatalytic and photodynamic actions of a 2,6-diiodinated-BODIPY (2,6-diI2Bod) photosensitizer (PS) covalently linked to TiO2 nanoparticles (NPs). The TiO2 NPs were synthesized utilizing ... -
Fabrication and characterization of TiO2 nanoparticles conjugated luminescence upconversion nanoparticles
Demirel Topel, Seda; Topel, Önder; Turgut Cin, Günseli (Open Access Journal, 2018)TiO2 nanoparticles conjugated luminescence upconversion (TiO2-UC) nanocomposites have been fabricated by covalently linking of carboxyl-functionalized TiO2 and amino-functionalized NaYF4:Yb3+,Er3+,Ce3+ upconversion ... -
Fluorescence quenching-based bodipy-boronic acid linked viologen dual system for potential glucose sensing applications
Demirel Topel, Seda; Beyaz, Mustafa İlker (Sensor Review, 2022)Purpose – The purpose of this study is to develop a non-enzymatic based glucose-sensing platform composed of Bodipy-BBV dual system which can be monitored by a photodetector under the blue LED excitation. Design/method ... -
Multifunctional magnetic nanocarrier: synthesis, characterization and pH-responsive doxorubicin release profile
Demirel Topel, Seda (2019)In this study, carboxymethyl cellulose (CMC) functionalized superparamagnetic iron oxide nanoparticles (SPIONs) have been synthesized as a novel theranostic platform which enables magnetic resonance (MR) imaging-guided and ... -
Near-infrared inducible supports in bio-catalysts design: A useful and versatile tool in enhancement of enzyme activity
Noma, Samir Abbas Ali; Dik, Gamze; Gürses, Canpolat; Kuruçay, Ali; Demirel Topel, Seda; Ulu, Ahmet; Asiltürk, Meltem; Ateş, Burhan (2024)Immobilized enzymes have encountered two main challenges: Reduced enzyme activity compared to free enzymes and exhausted immobilized enzymes due to reusability. Herein, we suggested a promising activity enhancement strategy ... -
Optimization of hydrothermal synthesis of Ce3+ co-doped NaYF4, Yb3+, Er3+upconversion nanoparticles and investigation of their size, morphology, and phase transitions.
Demirel Topel, Seda (ICENS, 2019)In this study, the synthesis of water-soluble polyethyleneimine (PEI) modified UCNPs which were prepared by a hydrothermal method have been reported. The resultant UCNPs were small size and hexagonal β-phase structure ... -
An organic-based hybrid hydrogels: its preperation method, structural investigation, and lanthanum uptake
Demirel Topel, Seda; Kyshkarova, Viktoriia; Melnyk, Inna (International AEGEAN Conferences on Natural & Medical Sciences-VI, 2022)Rare earth elements (REEs) have been found broad applications in superconductive materials, catalysts, magnetics, hydrogen storage materials, and rechargeable batteries. By integrating REEs into different fields, their ... -
pH-responsive carboxymethyl cellulose conjugated superparamagnetic iron oxide nanocarriers
Gürkan Polat, Tülin; Demirel Topel, Seda (Journal of Scientific Perspectives, 2019)In the present study, polyethyleneimine (PEI) coated superparamagnetic iron oxide nanoparticles (SPIONs) having the size of 15 nm in diameter with high magnetic saturation (60 emu/g) have been prepared by co-precipitation ... -
Photocatalytic degradation of bodipy dye with a shungite based PVA hydrogel under UV-light irradiation
Kyshkarova, Viktoriia; Melnyk, Inna; Demirel Topel, Seda (Proceedings of Academics World International Conference, 2022)The contamination of water with dyes is a critical problem for the environment and a great deal of research is invested to produce the novel adsorbent composites with high adsorption capacity and at the same time gaining ... -
Shungite/Poly(vinyl alcohol) hybrid hydrogels: An efficient adsorption material for rare earth metals in aqueous media
Kyshkarova, Viktoriia; Behunova, Dominika Marcin; Melnyk, Inna; Demirel Topel, Seda (Wiley, 2023)Rare earth elements play a pivotal role in modern technologies, therebydriving an escalating demand for their procurement. To effectively extractthese elements from aqueous solutions, it is imperative to explore innovativesorbent ... -
Sodium-Alginate based composite films for effective removal of congo red and coralene dark red 2B dyes: kinetic, isotherm and thermodynamic analysis
Mokeddem, Amina; Benykhlef, Samir; Bendaoudi, Amine Ahmed; Boudouaia, Nacer; Mahmoudi, Hacene; Bengharez, Zohra; Demirel Topel, Seda; Topel, Önder (MDPI, 2023)The present study aimed to investigate the adsorption capacity of two anionic dyes, namely, Congored (CR) and Coralene Dark Red2B (DR), onto prepared alginate (Alg) and chitosan(Cs) biopolymer films. The two biopolymers ... -
Synthesis and characterization of Near-Infrared (NIR)-light triggerable upconverting nanoparticles to enhance activity of immobilized l-asparaginase
Dik, Gamze; Noma, Samir Abbas Ali; Ulu, Ahmet; Demirel Topel, Seda; Asiltürk Ersoy, Meltem; Ateş, Burhan (4. EURASIA Biochemical Approaches & Technologies-4.EBAT Conference, 2022)In this study, PEG-L-ASNase enzyme was immobilized on UCNPs and its activity was improved by NIR. NaYF4: Yb3+, Er3+/PEI UCNPs were characterized to observe structural and morphological changes before/after enzyme immobilization. ...