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Polymer Film Supported Bimetallic Au–Ag Catalysts for Electrocatalytic Oxidation of Ammonia Borane in Alkaline Media

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Nano-Micro Letters 2016年第4期8卷 358-370页

作者： Sukriye Ulubay Karabiberoglu Cagri Ceylan kocak suleyman kocak Zekerya Dursun Department of Chemistry Science FacultyEge University Occupational Health and Safety Department Bergama Vocational SchoolDokuz Eylul University Department of Chemistry Science and Art FacultyCelal Bayar University

Ammonia borane is widely used in most areas including fuel cell *** present paper describes electrochemical behavior of ammonia borane in alkaline media on the poly(p-aminophenol) film modified with Au and Ag bimetallic *** glassy carbon electrode was firstly covered with polymeric film electrochemically and then,Au,Ag,and Au–Ag nanoparticles were deposited on the polymeric film,*** surface morphology and chemical composition of these electrodes were examined by scanning electron microscopy,transmission electron microscopy,electrochemical impedance spectroscopy,X-ray diffraction,and X-ray photoelectron *** was found that alloyed Au–Ag bimetallic nanoparticles are *** measurements indicate that the developed electrode modified by Au–Ag bimetallic nanoparticles exhibit the highest electrocatalytic activity for ammonia borane oxidation in alkaline *** rotating disk electrode voltammetry demonstrates that the developed electrode can catalyze almost six-electron oxidation pathway of ammonia *** results may be attractive for anode materials of ammonia borane fuel cells under alkaline conditions.

关键词： Au-Ag bimetallic nanoparticles Ammonia borane Electrocatalyst Electropolymerization Alkaline media

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Evaluation of systemic risk factors in different optical coherence tomographic patterns of diabetic macular edema

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International Journal of Ophthalmology(English edition) 2018年第7期11卷 1204-1209页

作者： Durgul Acan Eyyup Karahan Nilufer kocak suleyman Kaynak Department of Ophthalmology Yatagan Public Hospital Department of Ophthalmology Van Training and Research Hospital Department of Ophthalmology Dokuz Eylul University Faculty of Medicine

AIM： To elucidate the relationship between systemic risk factors and different patterns of diabetic macular edema（DME） determined with optical coherence tomography（OCT）. METHODS： In this cross-sectional study, DME was classified by OCT as diffuse retinal thickness（DRT）, cystoid macular edema（CME） and serous retinal detachment（SRD） and the relationship between the systemic risk factors and DME patterns was evaluated. RESULTS： Of the 57 patients with DME, 21（36.8%） had DRT, 24（42.1%） had CME and 12（21.0%） had SRD. Microor macro-albuminuria was significantly higher in the DRT pattern（61.9%） compared with the SRD（50.0%） and CME patterns（25.0%; P=0.040）. Hemoglobin A1 c（Hb A1 c） level was significantly higher and patients were younger in the DRT pattern group（P=0.034, P=0.032）. Best corrected visual acuity was the worst and central macular thickness was the thickest in the CME pattern group. CONCLUSION： Micro-or macro-albuminuria may be more frequent and Hb A1 c level may be higher in patients with DRT. These patients are also seen to be younger than patients with non-DRT.

关键词： cystoid macular edema diabetic macular edema diffuse retinal thickness optical coherence tomography serous retinal detachment

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Effects of resveratrol and methylprednisolone on biochemical,neurobehavioral and histopathological recovery after experimental spinal cord injury

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Acta Pharmacologica Sinica 2006年第10期27卷 1317-1325页

作者： Ozkan ARIES suleyman CAYLI Eyup ALTINOZ Iclal GURSES Neslihan YUCEL Ayhan kocak Saim YOLOGLU Yusuf TURKOZ Department of Neurosurgery Department of Biochemistry Department of Pathology Department of Emergency Medicine Department of Biostatistics Inonu UniversitySchool of Medicine44280 MalatyaTurkey

Aim:To investigate the neuroprotective effect of resveratrol in an experimentalspinal cord injury(SCI)model in ***:Male Wistar albino rats weighing200-250 g were randomized into six ***-drop trauma was performedfor *** 1 underwent laminectomy *** 2 underwent laminectomyfollowed by *** 3,4,5,and 6 underwent laminectomy followed by SCIand received resveratrol(100 mg/kg),methylprednisolone(MP)(30 mg/kg),resveratrol(100 mg/kg)plus MP(30 mg/kg),and ethanol(2%),*** were divided into two subgroups for biochemical analysis(killed at 24 h aftersurgery)and for neurobehavioral and histopathological evaluation(killed at 6weeks after surgery).Posttraumatic neurological recovery after surgery was re-corded ***:Groups 3 and 5 revealed significantly lower malon-dialdehyde,nitric oxide,xanthine oxidase,and higher glutathione levels than group4(P<0.05).Neurological recovery rates were significantly better in groups 3 and5 than group 4(P<0.05).When spinal trauma size ratios were compared,there wasno significant difference between treatment ***:Resveratroltreatment revealed better biochemical recovery in the acute stage of trauma thanMP *** resveratrol and combined treatment revealed betterneurobehavioral recovery than MP treatment;resveratrol,MP,and combined treat-ment modalities improved histopathological recovery at the same level in the finalstage of the *** studies involving different doses of resveratroland different doses combinations with MP could promise better results as eachdrug has a different anti-oxidative mechanism of action.

关键词： lipid peroxidation resveratrol spinal cord

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