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Browsing Kimya / Chemistry by Author "Sakarya Üniversitesi/Biyomedikal, Manyetik Ve Yarıiletken Malzemeler Araştırma Merkezi"

Now showing items 1-20 of 26

3D porous collagen/functionalized multiwalled carbon nanotube/chitosan/hydroxyapatite composite scaffolds for bone tissue engineering

Türk, Serbülent; Altınsoy, İbrahim; Çelebi Efe, Gözde Fatma; İpek, Mümtaz; Özacar, Mahmut; Bindal, Cuma (ELSEVIER SCIENCE BV, 2018)

In this study, we describe new collagen/functionalized multiwalled carbon nanotube/chitosan/hydroxyapatite (Col/f-MWCNT/CS/HA) composite scaffolds which were fabricated by freezing ( - 40 degrees C at 0.9 degrees C/min) ...
A comparison of pretreatments on hydroxyapatite formation on Ti by biomimetic method

Türk, Serbülent; Altınsoy, İbrahim; Çelebi Efe, Gözde Fatma; İpek, Mediha; Özacar, Mahmut; Bindal, Cuma (SPRINGER, 2018)

In this study, hydroxyapatite coating on titanium material substrate was successfully performed by using biomimetic method. Titanium plates immersed in 1.5 SBF at pH 7.4 and 37 degrees C were analyzed at the end of the ...
A facile and effective immobilization of glucose oxidase on tannic acid modified CoFe2O4 magnetic nanoparticles

Seher Altun; Çakıroğlu, Bekir; Munteha Ozacar; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2015)

This article presents a study of glucose oxidase (GOx) immobilization by employing tannic acid (TA) modified-CoFe2O4 (CFO) magnetic nanoparticles which demonstrates novel aspect for enzyme immobilization. By using the ...
A Photoelectrochemical Biosensor Fabricated using Hierarchically Structured Gold Nanoparticle and MoS2 on Tannic Acid Templated Mesoporous TiO2

Çakıroğlu, Bekir; Özacar, Mahmut (WILEY-V C H VERLAG GMBH, 2020)

In a tannic acid assisted synthesis of mesoporous TiO2, tannic acid was used as a cost effective and non-toxic template for pore formation. Meanwhile, a gold nanoparticles (Au NPs) deposited TiO2 nanocomposite was coated ...
A Photoelectrochemical Biosensor Fabricated using Hierarchically Structured Gold Nanoparticle and MoS2 on Tannic Acid Templated Mesoporous TiO2

Çakıroğlu, Bekir; Çakıroğlu, Bekir; Özacar, Mahmut (WILEY-V C H VERLAG GMBH, 2019)

In a tannic acid assisted synthesis of mesoporous TiO2, tannic acid was used as a cost effective and non-toxic template for pore formation. Meanwhile, a gold nanoparticles (Au NPs) deposited TiO2 nanocomposite was coated ...
A photoelectrochemical glucose and lactose biosensor consisting of gold nanoparticles, MnO2 and g-C3N4 decorated TiO2

Çakıroğlu, Bekir; Yigit Can Demirci; Emine Gokgoz; Özacar, Mahmut (ELSEVIER SCIENCE SA, 2019)

In this study, an innovative light-sensitive hybrid material was used for the photoelectrochemical (PEC) biosensor fabrication. Herein, gold nanoparticles modified mesoporous TiO2 was coated on an indium fin oxide substrate, ...
A self-powered photoelectrochemical biosensor for H2O2, and xanthine oxidase activity based on enhanced chemiluminescence resonance energy transfer through slow light effect in inverse opal TiO2

Çakıroğlu, Bekir; Özacar, Mahmut; Özacar, Mahmut (ELSEVIER ADVANCED TECHNOLOGY, 2019)

TiO2 inverse opal photonic crystals (IOPCs) were fabricated by using polystyrene template. TiO2 IOPCs based photoelectrochemical (PEC) biosensor was fabricated for the precise and stable detection of Heme without external ...
A self-powered photoelectrochemical glucose biosensor based on supercapacitor Co3O4-CNT hybrid on TiO2

Çakıroğlu, Bekir; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER ADVANCED TECHNOLOGY, 2018)

In this study, a photoelectrochemical (PEC) biosensor was constructed by depositing supercapacitor carbon nanotubes (CNT) and Co3O4 onto the anatase TiO2 coated ITO electrodes. Herein, supercapacitor Co3O4 was employed as ...
Biomimetric coating of monophasic brushite on Ti6Al4V in new m-5xSBF

Türk, Serbülent; Türk, Serbülent; Altınsoy, İbrahim; Çelebi Efe, Gözde Fatma; İpek, Mediha; Özacar, Mahmut; Bindal, Cuma (ELSEVIER SCIENCE SA, 2018)

Ti6Al4V plates were exposed to soaking alkali treatment resulted in Na0.23TiO2 phase on the surface before realizing biomimetic Calcium-Phosphate (CaP) coating in prepared m-5xSBF and 5xSBF solutions at 37 degrees C and ...
Characterization and immobilization of trypsin on tannic acid modified Fe3O4 nanoparticles

Atacan, Keziban; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2015)

Fe3O4 nanoparticles (NPs) were synthesized by co-precipitating Fe2+ and Fe3+ in an ammonia solution. Fe3O4 NPs functionalized with tannic acid were prepared. After functionalization process, trypsin enzyme was immobilized ...
Covalent immobilization of trypsin onto modified magnetite nanoparticles and its application for casein digestion

Atacan, Keziban; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2017)

The immobilization method consists of the production magnetite nanoparticles (Fe3O4) by solvothermal treatment of FeCl3 and sodium acetate (NaAc) in the presence of ethylene glycol. Subsequently, the surface of magnetite ...
Effect of Solution and Calcination Time on Sol-gel Synthesis of Hydroxyapatite

Türk, Serbülent; Altınsoy, İbrahim; Gozde Celebi Efe; İpek, Mediha; Özacar, Mahmut; Bindal, Cuma (SPRINGER SINGAPORE PTE LTD, 2019)

Nano-sized hydroxyapatite (HA) particles were synthesized by sol-gel through water and ethanol based mediums of phosphoric acid (H3PO4) and calcium hydroxide (Ca(OH)(2)) at pH = 11 for different calcination time (1 h, 2 ...
Efficiency of glucose oxidase immobilized on tannin modified NiFe2O4 nanoparticles on decolorization of dye in the Fenton and photo-biocatalytic processes

Atacan, Keziban; Güy, Nuray; Güy, Nuray; Soner Cakar; Özacar, Mahmut (ELSEVIER SCIENCE SA, 2019)

Immobilized enzymes are significantly studied both environmental and textile industries. In this work, glucose oxidase was immobilized on the tannin coated NiFe2O4 magnetic nanoparticles for decolorization of indigo carmin. ...
Efficient protein digestion using immobilized trypsin onto tannin modified Fe3O4 magnetic nanoparticles

Atacan, Keziban; Atacan, Keziban; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2017)

Fe3O4 magnetic nanoparticles (MNPs) were prepared via solvothermal method. A commercially available trypsin was covalently immobilized onto MNPs modified with tannin (T) via a novel binding process. The morphology, structure, ...
Improvement of the stability and activity of immobilized trypsin on modified Fe3O4 magnetic nanoparticles for hydrolysis of bovine serum albumin and its application in the bovine milk

Atacan, Keziban; Atacan, Keziban; Çakıroğlu, Bekir; Çakıroğlu, Bekir; Özacar, Mahmut (ELSEVIER SCI LTD, 2016)

Trypsin (EC 3.4.21.4) was successfully immobilized on the surface of Fe3O4 magnetic nanoparticles that had been pre-treated with gallic acid (GA). Measurements of protein load by using Bradford assay and the trypsin-catalyzed ...
Investigation of antibacterial properties of novel papain immobilized on tannic acid modified Ag/CuFe2O4 magnetic nanoparticles

Atacan, Keziban; Munteha Ozacar; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2018)

The non-toxic CuFe2O4 magnetic nanoparticles have been solvothermally synthesized, characterized and used as an efficient magnetic precursor for papain immobilization and then investigated antibacterial properties of them. ...
Lipase-based on starch material as a development matrix with magnetite cross-linked enzyme aggregates and its application

Atheer Awad Mehde; Wesen Adel Mehdi; Severgün, Olcay; Soner Cakar; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2018)

The Fe3O4 magnetic nanoparticles were prepared by precipitating ferrous ion (Fe2+) and ferric ion (Fe3+) in alkaline solution. The Fe3O4 magnetic nanoparticles were modified by tannic acid. After functionalization process, ...
Microwave-assisted biomimetic synthesis of hydroxyapatite using different sources of calcium

Türk, Serbülent; Altınsoy, İbrahim; Çelebi Efe, Gözde Fatma; İpek, Mümtaz; Özacar, Mahmut; Bindal, Cuma (ELSEVIER SCIENCE BV, 2017)

In this study, some properties of biomimetic synthesized hydroxyapatite by using different sources of calcium were investigated. Biomimetic synthesis of hydroxyapatite was carried out in microwave oven using 1.5 simulated ...
New CuFe2O4/amorphous manganese oxide nanocomposites used as photocatalysts in photoelectrochemical water splitting

Atacan, Keziban; Burcu Topaloglu; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2018)

The utilization of visible light for the photoelectrochemical production of hydrogen gas from water is a scientific challenge. Water splitting for the production of hydrogen using copper-ferrite and amorphous manganese ...
Novel hydroxyapatite/graphene oxide/collagen bioactive composite coating on Ti16Nb alloys by electrodeposition

Yılmaz, Eren; Çakıroğlu, Bekir; Gökçe, Azim; Fındık, Fehim; H. Ozkan Gulsoy; Nagihan Gulsoy; Ozal Mutlu; Özacar, Mahmut (ELSEVIER SCIENCE BV, 2019)

A novel implant coating material containing graphene oxide (GO) and collagen (COL), and hydroxyapatite (HA) was fabricated with the aid of tannic acid by electrodeposition. The surface of Ti16Nb alloy was subjected to ...