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1
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Effect of Cold Rolling on Electrochemical Impedance Behavior of New Β-Type TI-6MO-6V-5CR-3SN-2.5ZR Alloy

100%
Song H., Zakiyuddin A., Kim S., Lee K.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 2
2
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Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method

100%
Mikołajczyk T., Turemko M., Pierożyński B.
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EN
In this study, palladium-modified nickel foam substrate was applied to examine ethanol oxidation reaction (EOR) in 0.1 M NaOH supporting solution. An EOR catalyst was prepared by physical vapour deposition (PVD) of palladium onto Ni foam material. Temperature-dependent kinetics of the EOR were studied over the temperature range: 20-60°C by means of a.c. impedance spectroscopy and cyclic voltammetry techniques. Deposition of a noble metal additive was clearly exposed through scanning electron microscopy: SEM/EDX-supported analysis. Most importantly, this work investigated the effect of pre-deposited fullerene on nickel foam, on the catalytic (EOR) properties of such-produced Ni foam/Pd composite material.
3
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Kinetics of electrooxidation of phenol on polycrystalline platinum

100%
Pierożyński B., Piotrowska G., Mikołajczyk T.
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EN
This work reports on kinetics of phenol electrooxidation reaction (PhER), examined at polycrystalline Pt electrode in 0.5 M H2SO4 and 0.1 M NaOH supporting solutions. Important aspects of PhER kinetics were analysed based on potential-dependent, a.c. impedance-derived values of charge-transfer resistance and capacitance parameters. Special attention was also given to the influence of supporting electrolyte ions on the process of phenol oxidation (pH dependence of the PhER), in relation to an important role of anion adsorption on the Pt catalyst surface.
4
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Towards understanding of protein adsorption behavior on plasma polymerized pyrrole film

88%
Zhang Z., Li G., Yan F., Zheng X., Li X.
Open Chemistry
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2012
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vol. 10
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issue 4
1157-1164
EN
Plasma polymerized pyrrole-like (PPpy) films exhibit good environmental stability and offer high reactivity with biomolecules. The present paper follows on from previous work on PPpy films applied as DNA immobilization/hybridization and describes the adsorption kinetics of bovine serum albumin (BSA) on PPpy films. Atom force microscopy was used to detect the surface roughness of PPpy surfaces obtained at different input powers or for different polymerization time, including the surface roughness before and after BSA adsorption. The influence of experimental conditions (i.e., the plasma input power, the polymerization time, the concentration of BSA, and the pH values of buffer solutions) on protein adsorption was investigated in situ by Surface plasmon resonance spectroscopy (SPR). SPR analysis confirmed the differently dynamic adsorption behavior of BSA on PPpy films under various experimental conditions. The adsorption constant, K a , was deduced from Langmuir isotherm equations, which were simulated using experimental data collected by SPR and electrochemical impedance spectroscopy (EIS). Analysis of the combination data of SPR and EIS indicates that PPpy films under various conditions show completely different adsorption behaviors and could be applied as biomaterials for electrochemical protein sensing or as protein-resistant. [...]
5
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Fractional model of the electrochemical capacitor relaxation phenomenon

88%
Martynyuk V., Ortigueira M. D., Fedula M., Savenko O.
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2018
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issue 4
6
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In vitro hemocompatibility and corrosion behavior of new Zr-binary alloys in whole human blood

88%
Totea G., Ionita D., Demetrescu I., Mitache M.
Open Chemistry
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2014
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vol. 12
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issue 7
796-803
EN
The aim of this study is to evaluate the accuracy of three binary alloys’ composition, and their biocompatibility. Depending on the intended use of the medical devices made from these materials, dynamic or static tests should be performed. We have chosen static tests as we thought they may be used as knee or hip replacement, and not as cardiac valves. Three binary alloys ( Zr10Nb, Zr2.5Nb and Zr12Ta) were obtained from high purity powders (>99.9%), using an induction furnace first, and an electric arc furnace for a perfect homogenization. Their final composition was verified with a XRF analyzer-INNOV-X. Hemolysis tests can determine the degree of red blood cells lysis and the release of hemoglobin. The released hemoglobin quantity was extremely small, under 2%, in all cases, and the coagulation tests showed no risk for thrombosis. The electrochemical behavior was also studied in biological fluid, human female serum, and showed a low corrosion rate. The obtained alloys do not cause hemolysis, so they are hemocompatible with all blood types.
7
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Sustainable use of Natural Resources as Alternative for the Hazardous Corrosion Inhibitor of Mild Steel/Dilute Sulfuric Acid Interface: Weight Loss, EIS, AFM and FTIR Studies

63%
Tezeghdenti M., Etteyeb N., Dhouibi L., Kanoun O.
Archives of Metallurgy and Materials
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2018
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vol. 63
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issue 2
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